---
OA_place: publisher
OA_type: free access
_id: '3922'
abstract:
- lang: eng
text: Dispersal is advantageous, but, at the same time, it implies high costs and
risks. Due to these counteracting selection pressures, many species evolved dispersal
polymorphisms, which, in ants, are typically restricted to the female sex (queens).
Male polymorphism is presently only known from a few genera, such as Cardiocondyla,
in which winged dispersing males coexist with wingless fighter males that mate
exclusively inside their maternal nests. We studied the developmental mechanisms
underlying these alternative male morphs and found that, first, male dimorphism
is not genetically determined, but is induced by environmental conditions (decreasing
temperature and density). Second, male morph is not yet fixed at the egg stage,
but it differentiates during larval development. This flexible developmental pattern
of male morphs allows Cardiocondyla ant colonies to react quickly to changes in
their environment. Under good conditions, they invest exclusively in philopatric
wingless males. But, when environmental conditions turn bad, colonies start to
produce winged dispersal males, even though these males require a many times higher
investment by the colony than their much smaller wingless counterparts. Cardiocondyla
ants share this potential of optimal resource allocation with other colonial animals
and some seed dimorphic plants.
article_processing_charge: No
article_type: original
author:
- first_name: Sylvia
full_name: Cremer, Sylvia
id: 2F64EC8C-F248-11E8-B48F-1D18A9856A87
last_name: Cremer
orcid: 0000-0002-2193-3868
- first_name: Jürgen
full_name: Heinze, Jürgen
last_name: Heinze
citation:
ama: 'Cremer S, Heinze J. Stress grows wings: Environmental induction of winged
dispersal males in Cardiocondyla ants. Current Biology. 2003;13(3):219-223.
doi:10.1016/S0960-9822(03)00012-5'
apa: 'Cremer, S., & Heinze, J. (2003). Stress grows wings: Environmental induction
of winged dispersal males in Cardiocondyla ants. Current Biology. Elsevier.
https://doi.org/10.1016/S0960-9822(03)00012-5'
chicago: 'Cremer, Sylvia, and Jürgen Heinze. “Stress Grows Wings: Environmental
Induction of Winged Dispersal Males in Cardiocondyla Ants.” Current Biology.
Elsevier, 2003. https://doi.org/10.1016/S0960-9822(03)00012-5.'
ieee: 'S. Cremer and J. Heinze, “Stress grows wings: Environmental induction of
winged dispersal males in Cardiocondyla ants,” Current Biology, vol. 13,
no. 3. Elsevier, pp. 219–223, 2003.'
ista: 'Cremer S, Heinze J. 2003. Stress grows wings: Environmental induction of
winged dispersal males in Cardiocondyla ants. Current Biology. 13(3), 219–223.'
mla: 'Cremer, Sylvia, and Jürgen Heinze. “Stress Grows Wings: Environmental Induction
of Winged Dispersal Males in Cardiocondyla Ants.” Current Biology, vol.
13, no. 3, Elsevier, 2003, pp. 219–23, doi:10.1016/S0960-9822(03)00012-5.'
short: S. Cremer, J. Heinze, Current Biology 13 (2003) 219–223.
date_created: 2018-12-11T12:05:54Z
date_published: 2003-02-04T00:00:00Z
date_updated: 2026-05-18T09:07:29Z
day: '04'
doi: 10.1016/S0960-9822(03)00012-5
extern: '1'
external_id:
pmid:
- '12573217'
fulldoi: https://doi.org/10.1016/S0960-9822(03)00012-5
intvolume: ' 13'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/S0960-9822(03)00012-5
month: '02'
oa: 1
oa_version: Published Version
page: 219 - 223
pmid: 1
publication: Current Biology
publication_status: published
publisher: Elsevier
publist_id: '2234'
quality_controlled: '1'
status: public
title: 'Stress grows wings: Environmental induction of winged dispersal males in Cardiocondyla
ants'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 13
year: '2003'
...
---
_id: '3991'
abstract:
- lang: eng
text: We give analytic inclusion-exclusion formulas for the area and perimeter derivatives
of a union of finitely many disks in the plane.
acknowledgement: Partially supported by NSF under grant DMS-98-73945 and CCR-00-86013.
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Ho
full_name: Cheng, Ho
last_name: Cheng
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
citation:
ama: 'Cheng H, Edelsbrunner H. Area and perimeter derivatives of a union of disks.
In: Computer Science in Perspective: Essays Dedicated to Thomas Ottmann.
Vol 2598. Springer; 2003:88-97. doi:10.1007/3-540-36477-3_7'
apa: 'Cheng, H., & Edelsbrunner, H. (2003). Area and perimeter derivatives of
a union of disks. In Computer Science in Perspective: Essays Dedicated to Thomas
Ottmann (Vol. 2598, pp. 88–97). Springer. https://doi.org/10.1007/3-540-36477-3_7'
chicago: 'Cheng, Ho, and Herbert Edelsbrunner. “Area and Perimeter Derivatives of
a Union of Disks.” In Computer Science in Perspective: Essays Dedicated to
Thomas Ottmann, 2598:88–97. Springer, 2003. https://doi.org/10.1007/3-540-36477-3_7.'
ieee: 'H. Cheng and H. Edelsbrunner, “Area and perimeter derivatives of a union
of disks,” in Computer Science in Perspective: Essays Dedicated to Thomas Ottmann,
vol. 2598, Springer, 2003, pp. 88–97.'
ista: 'Cheng H, Edelsbrunner H. 2003.Area and perimeter derivatives of a union of
disks. In: Computer Science in Perspective: Essays Dedicated to Thomas Ottmann.
LNCS, vol. 2598, 88–97.'
mla: 'Cheng, Ho, and Herbert Edelsbrunner. “Area and Perimeter Derivatives of a
Union of Disks.” Computer Science in Perspective: Essays Dedicated to Thomas
Ottmann, vol. 2598, Springer, 2003, pp. 88–97, doi:10.1007/3-540-36477-3_7.'
short: 'H. Cheng, H. Edelsbrunner, in:, Computer Science in Perspective: Essays
Dedicated to Thomas Ottmann, Springer, 2003, pp. 88–97.'
date_created: 2018-12-11T12:06:18Z
date_published: 2003-02-17T00:00:00Z
date_updated: 2024-02-27T12:15:02Z
day: '17'
doi: 10.1007/3-540-36477-3_7
extern: '1'
fulldoi: https://doi.org/10.1007/3-540-36477-3_7
intvolume: ' 2598'
language:
- iso: eng
month: '02'
oa_version: None
page: 88 - 97
publication: 'Computer Science in Perspective: Essays Dedicated to Thomas Ottmann'
publication_identifier:
isbn:
- '9783540005797'
publication_status: published
publisher: Springer
publist_id: '2132'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Area and perimeter derivatives of a union of disks
type: book_chapter
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 2598
year: '2003'
...
---
_id: '3992'
abstract:
- lang: eng
text: Computing the volume occupied by individual atoms in macromolecular structures
has been the subject of research for several decades. This interest has grown
in the recent years, because weighted volumes are widely used in implicit solvent
models. Applications of the latter in molecular mechanics simulations require
that the derivatives of these weighted volumes be known. In this article, we give
a formula for the volume derivative of a molecule modeled as a space-filling diagram
made up of balls in motion. The formula is given in terms of the weights, radii,
and distances between the centers as well as the sizes of the facets of the power
diagram restricted to the space-filling diagram. Special attention is given to
the detection and treatment of singularities as well as discontinuities of the
derivative.
article_processing_charge: No
article_type: original
author:
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Patrice
full_name: Koehl, Patrice
last_name: Koehl
citation:
ama: Edelsbrunner H, Koehl P. The weighted-volume derivative of a space-filling
diagram. PNAS. 2003;100(5):2203-2208. doi:10.1073/pnas.0537830100
apa: Edelsbrunner, H., & Koehl, P. (2003). The weighted-volume derivative of
a space-filling diagram. PNAS. National Academy of Sciences. https://doi.org/10.1073/pnas.0537830100
chicago: Edelsbrunner, Herbert, and Patrice Koehl. “The Weighted-Volume Derivative
of a Space-Filling Diagram.” PNAS. National Academy of Sciences, 2003.
https://doi.org/10.1073/pnas.0537830100.
ieee: H. Edelsbrunner and P. Koehl, “The weighted-volume derivative of a space-filling
diagram,” PNAS, vol. 100, no. 5. National Academy of Sciences, pp. 2203–2208,
2003.
ista: Edelsbrunner H, Koehl P. 2003. The weighted-volume derivative of a space-filling
diagram. PNAS. 100(5), 2203–2208.
mla: Edelsbrunner, Herbert, and Patrice Koehl. “The Weighted-Volume Derivative of
a Space-Filling Diagram.” PNAS, vol. 100, no. 5, National Academy of Sciences,
2003, pp. 2203–08, doi:10.1073/pnas.0537830100.
short: H. Edelsbrunner, P. Koehl, PNAS 100 (2003) 2203–2208.
date_created: 2018-12-11T12:06:19Z
date_published: 2003-03-04T00:00:00Z
date_updated: 2024-02-27T12:31:59Z
day: '04'
doi: 10.1073/pnas.0537830100
extern: '1'
external_id:
pmid:
- '12601153'
fulldoi: https://doi.org/10.1073/pnas.0537830100
intvolume: ' 100'
issue: '5'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC151318/
month: '03'
oa: 1
oa_version: Published Version
page: 2203 - 2208
pmid: 1
publication: PNAS
publication_identifier:
issn:
- 0027-8424
publication_status: published
publisher: National Academy of Sciences
publist_id: '2133'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The weighted-volume derivative of a space-filling diagram
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 100
year: '2003'
...
---
OA_type: closed access
_id: '3993'
abstract:
- lang: eng
text: We present algorithms for constructing a hierarchy of increasingly coarse
Morse-Smale complexes that decompose a piecewise linear 2-manifold. While these
complexes are defined only in the smooth category, we extend the construction
to the piecewise linearcategory by ensuring structural integrity and simulating
differentiability. We then simplify Morse-Smale complexes by canceling pairs of
critical points in order of increasing persistence.
article_processing_charge: No
article_type: original
author:
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: John
full_name: Harer, John
last_name: Harer
- first_name: Afra
full_name: Zomorodian, Afra
last_name: Zomorodian
citation:
ama: Edelsbrunner H, Harer J, Zomorodian A. Hierarchical Morse-Smale complexes for
piecewise linear 2-manifolds. Discrete & Computational Geometry. 2003;30:87-107.
doi:10.1007/s00454-003-2926-5
apa: Edelsbrunner, H., Harer, J., & Zomorodian, A. (2003). Hierarchical Morse-Smale
complexes for piecewise linear 2-manifolds. Discrete & Computational Geometry.
Springer nature. https://doi.org/10.1007/s00454-003-2926-5
chicago: Edelsbrunner, Herbert, John Harer, and Afra Zomorodian. “Hierarchical Morse-Smale
Complexes for Piecewise Linear 2-Manifolds.” Discrete & Computational Geometry.
Springer nature, 2003. https://doi.org/10.1007/s00454-003-2926-5.
ieee: H. Edelsbrunner, J. Harer, and A. Zomorodian, “Hierarchical Morse-Smale complexes
for piecewise linear 2-manifolds,” Discrete & Computational Geometry,
vol. 30. Springer nature, pp. 87–107, 2003.
ista: Edelsbrunner H, Harer J, Zomorodian A. 2003. Hierarchical Morse-Smale complexes
for piecewise linear 2-manifolds. Discrete & Computational Geometry. 30, 87–107.
mla: Edelsbrunner, Herbert, et al. “Hierarchical Morse-Smale Complexes for Piecewise
Linear 2-Manifolds.” Discrete & Computational Geometry, vol. 30, Springer
nature, 2003, pp. 87–107, doi:10.1007/s00454-003-2926-5.
short: H. Edelsbrunner, J. Harer, A. Zomorodian, Discrete & Computational Geometry
30 (2003) 87–107.
date_created: 2018-12-11T12:06:19Z
date_published: 2003-05-01T00:00:00Z
date_updated: 2026-05-06T08:08:23Z
day: '01'
doi: 10.1007/s00454-003-2926-5
extern: '1'
fulldoi: https://doi.org/10.1007/s00454-003-2926-5
intvolume: ' 30'
language:
- iso: eng
month: '05'
oa_version: None
page: 87 - 107
publication: Discrete & Computational Geometry
publication_identifier:
eissn:
- 1432-0444
issnl:
- 0179-5376
publication_status: published
publisher: Springer nature
publist_id: '2134'
quality_controlled: '1'
status: public
title: Hierarchical Morse-Smale complexes for piecewise linear 2-manifolds
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 30
year: '2003'
...
---
OA_type: closed access
_id: '3994'
abstract:
- lang: eng
text: The body defined by a finite collection of disks is a subset of the plane
bounded by a tangent continuous curve, which we call the skin. We give analytic
formulas for the area, the perimeter, the area derivative, and the perimeter derivative
of the body. Given the filtrations of the Delaunay triangulation and the Voronoi
diagram of the disks, all formulas can be evaluated in time proportional to the
number of disks.
article_processing_charge: No
article_type: original
author:
- first_name: Ho
full_name: Cheng, Ho
last_name: Cheng
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
citation:
ama: Cheng H, Edelsbrunner H. Area, perimeter and derivatives of a skin curve. Computational
Geometry. 2003;26(2):173-192. doi:10.1016/S0925-7721(02)00124-4
apa: Cheng, H., & Edelsbrunner, H. (2003). Area, perimeter and derivatives of
a skin curve. Computational Geometry. Elsevier. https://doi.org/10.1016/S0925-7721(02)00124-4
chicago: Cheng, Ho, and Herbert Edelsbrunner. “Area, Perimeter and Derivatives of
a Skin Curve.” Computational Geometry. Elsevier, 2003. https://doi.org/10.1016/S0925-7721(02)00124-4.
ieee: H. Cheng and H. Edelsbrunner, “Area, perimeter and derivatives of a skin curve,”
Computational Geometry, vol. 26, no. 2. Elsevier, pp. 173–192, 2003.
ista: Cheng H, Edelsbrunner H. 2003. Area, perimeter and derivatives of a skin curve.
Computational Geometry. 26(2), 173–192.
mla: Cheng, Ho, and Herbert Edelsbrunner. “Area, Perimeter and Derivatives of a
Skin Curve.” Computational Geometry, vol. 26, no. 2, Elsevier, 2003, pp.
173–92, doi:10.1016/S0925-7721(02)00124-4.
short: H. Cheng, H. Edelsbrunner, Computational Geometry 26 (2003) 173–192.
date_created: 2018-12-11T12:06:20Z
date_published: 2003-10-01T00:00:00Z
date_updated: 2026-05-06T08:12:09Z
day: '01'
doi: 10.1016/S0925-7721(02)00124-4
extern: '1'
fulldoi: https://doi.org/10.1016/S0925-7721(02)00124-4
intvolume: ' 26'
issue: '2'
keyword:
- Computational geometry
- Differential geometry
- Skin curves
- Voronoi diagrams
- Delaunay triangulations
- Filtrations
- Disks
- Hyperbolas
- Area
- Perimeter
- Derivatives
language:
- iso: eng
month: '10'
oa_version: None
page: 173 - 192
publication: Computational Geometry
publication_status: published
publisher: Elsevier
publist_id: '2135'
quality_controlled: '1'
status: public
title: Area, perimeter and derivatives of a skin curve
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 26
year: '2003'
...
---
_id: '3997'
abstract:
- lang: eng
text: We combine topological and geometric methods to construct a multi-resolution
data structure for functions over two-dimensional domains. Starting with the Morse-Smale
complex, we construct a topological hierarchy by progressively canceling critical
points in pairs. Concurrently, we create a geometric hierarchy by adapting the
geometry to the changes in topology. The data structure supports mesh traversal
operations similarly to traditional multi-resolution representations.
acknowledgement: This work was performed under the auspices of the U. S. Department
of Energy by University of California Lawrence Livermore National Laboratory under
contract No. W-7405-Eng-48. H. Edelsbrunner is partially supported by the National
Science Foundation (NFS) under grants EIA-99-72879 and CCR-00-86013. B. Hamann is
supported by the NSF under contract ACI 9624034, through the LSSDSV program under
contract ACI 9982251, and through the NPACI; the National Institute of Mental Health
and the NSF under contract NIMH 2 P20 MH60975-06A2; the Lawrence Livermore National
Laboratory under ASCI ASAP Level-2 Memorandum Agreement B347878 and under Memorandum
Agreement B503159.
article_processing_charge: No
author:
- first_name: Peer
full_name: Bremer, Peer
last_name: Bremer
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Bernd
full_name: Hamann, Bernd
last_name: Hamann
- first_name: Valerio
full_name: Pascucci, Valerio
last_name: Pascucci
citation:
ama: 'Bremer P, Edelsbrunner H, Hamann B, Pascucci V. A multi-resolution data structure
for two-dimensional Morse-Smale functions. In: Proceedings of the 14th IEEE
Conference on Visualization . IEEE; 2003:139-146. doi:10.1109/VISUAL.2003.1250365'
apa: 'Bremer, P., Edelsbrunner, H., Hamann, B., & Pascucci, V. (2003). A multi-resolution
data structure for two-dimensional Morse-Smale functions. In Proceedings of
the 14th IEEE Conference on Visualization (pp. 139–146). Seattle, WA, USA
: IEEE. https://doi.org/10.1109/VISUAL.2003.1250365'
chicago: Bremer, Peer, Herbert Edelsbrunner, Bernd Hamann, and Valerio Pascucci.
“A Multi-Resolution Data Structure for Two-Dimensional Morse-Smale Functions.”
In Proceedings of the 14th IEEE Conference on Visualization , 139–46. IEEE,
2003. https://doi.org/10.1109/VISUAL.2003.1250365.
ieee: P. Bremer, H. Edelsbrunner, B. Hamann, and V. Pascucci, “A multi-resolution
data structure for two-dimensional Morse-Smale functions,” in Proceedings of
the 14th IEEE Conference on Visualization , Seattle, WA, USA , 2003, pp. 139–146.
ista: 'Bremer P, Edelsbrunner H, Hamann B, Pascucci V. 2003. A multi-resolution
data structure for two-dimensional Morse-Smale functions. Proceedings of the 14th
IEEE Conference on Visualization . VIS: IEEE Visualization, 139–146.'
mla: Bremer, Peer, et al. “A Multi-Resolution Data Structure for Two-Dimensional
Morse-Smale Functions.” Proceedings of the 14th IEEE Conference on Visualization
, IEEE, 2003, pp. 139–46, doi:10.1109/VISUAL.2003.1250365.
short: P. Bremer, H. Edelsbrunner, B. Hamann, V. Pascucci, in:, Proceedings of the
14th IEEE Conference on Visualization , IEEE, 2003, pp. 139–146.
conference:
end_date: 2003-10-24
location: 'Seattle, WA, USA '
name: 'VIS: IEEE Visualization'
start_date: 2003-10-19
date_created: 2018-12-11T12:06:21Z
date_published: 2003-08-01T00:00:00Z
date_updated: 2024-02-27T11:12:50Z
day: '01'
doi: 10.1109/VISUAL.2003.1250365
extern: '1'
fulldoi: https://doi.org/10.1109/VISUAL.2003.1250365
language:
- iso: eng
month: '08'
oa_version: None
page: 139 - 146
publication: 'Proceedings of the 14th IEEE Conference on Visualization '
publication_identifier:
isbn:
- '0780381203'
publication_status: published
publisher: IEEE
publist_id: '2131'
quality_controlled: '1'
scopus_import: '1'
status: public
title: A multi-resolution data structure for two-dimensional Morse-Smale functions
type: conference
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
year: '2003'
...
---
_id: '3999'
abstract:
- lang: eng
text: We introduce relaxed scheduling as a paradigm for mesh maintenance and demonstrate
its applicability to triangulating a skin surface in R-3.
acknowledgement: NSF under grant CCR-00- 86013.
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Alper
full_name: Üngör, Alper
last_name: Üngör
citation:
ama: 'Edelsbrunner H, Üngör A. Relaxed scheduling in dynamic skin triangulation.
In: Proceedings of the Japanese Conference on Discrete and Computational Geometry
. Vol 2866. Springer; 2003:135-151. doi:10.1007/978-3-540-44400-8_14'
apa: 'Edelsbrunner, H., & Üngör, A. (2003). Relaxed scheduling in dynamic skin
triangulation. In Proceedings of the Japanese Conference on Discrete and Computational
Geometry (Vol. 2866, pp. 135–151). Tokyo, Japan: Springer. https://doi.org/10.1007/978-3-540-44400-8_14'
chicago: Edelsbrunner, Herbert, and Alper Üngör. “Relaxed Scheduling in Dynamic
Skin Triangulation.” In Proceedings of the Japanese Conference on Discrete
and Computational Geometry , 2866:135–51. Springer, 2003. https://doi.org/10.1007/978-3-540-44400-8_14.
ieee: H. Edelsbrunner and A. Üngör, “Relaxed scheduling in dynamic skin triangulation,”
in Proceedings of the Japanese Conference on Discrete and Computational Geometry
, Tokyo, Japan, 2003, vol. 2866, pp. 135–151.
ista: 'Edelsbrunner H, Üngör A. 2003. Relaxed scheduling in dynamic skin triangulation.
Proceedings of the Japanese Conference on Discrete and Computational Geometry
. JCDCG: Japanese Conference on Discrete and Computational Geometry, LNCS, vol.
2866, 135–151.'
mla: Edelsbrunner, Herbert, and Alper Üngör. “Relaxed Scheduling in Dynamic Skin
Triangulation.” Proceedings of the Japanese Conference on Discrete and Computational
Geometry , vol. 2866, Springer, 2003, pp. 135–51, doi:10.1007/978-3-540-44400-8_14.
short: H. Edelsbrunner, A. Üngör, in:, Proceedings of the Japanese Conference on
Discrete and Computational Geometry , Springer, 2003, pp. 135–151.
conference:
end_date: 2002-12-09
location: Tokyo, Japan
name: 'JCDCG: Japanese Conference on Discrete and Computational Geometry'
start_date: 2002-12-06
date_created: 2018-12-11T12:06:21Z
date_published: 2003-12-16T00:00:00Z
date_updated: 2024-02-27T11:07:15Z
day: '16'
doi: 10.1007/978-3-540-44400-8_14
extern: '1'
fulldoi: https://doi.org/10.1007/978-3-540-44400-8_14
intvolume: ' 2866'
language:
- iso: eng
month: '12'
oa_version: None
page: 135 - 151
publication: 'Proceedings of the Japanese Conference on Discrete and Computational
Geometry '
publication_identifier:
isbn:
- '9783540207764'
publication_status: published
publisher: Springer
publist_id: '2127'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Relaxed scheduling in dynamic skin triangulation
type: conference
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 2866
year: '2003'
...
---
_id: '4146'
abstract:
- lang: eng
text: During vertebrate gastrulation, highly coordinated cellular rearrangements
lead to the formation of the three germ layers, ectoderm, mesoderm and endoderm.
In zebrafish, silberblick (slb)/wnt11 regulates normal gastrulation movements
by activating a signalling pathway similar to the Frizzled-signalling pathway,
which establishes epithelial planar cell polarity (PCP) in Drosophila. However,
the cellular mechanisms by which slb/wnt11 functions during zebrafish gastrulation
are still unclear. Using high-resolution two-photon confocal imaging followed
by computer-assisted reconstruction and motion analysis, we have analysed the
movement and morphology of individual cells in three dimensions during the course
of gastrulation. We show that in slb-mutant embryos, hypoblast cells within the
forming germ ring have slower, less directed migratory movements at the onset
of gastrulation. These aberrant cell movements are accompanied by defects in the
orientation of cellular processes along the individual movement directions of
these cells. We conclude that slb/wnt11-mediated orientation of cellular processes
plays a role in facilitating and stabilising movements of hypoblast cells in the
germ ring, thereby pointing at a novel function of the slb/wnt11 signalling pathway
for the regulation of migratory cell movements at early stages of gastrulation.
acknowledgement: 'We thank Jennifer Geiger, Mathias Köppen, Christian Dahmann and
Marcos Gonzalez-Gaitan for helpful comments on earlier versions of this manuscript,Beate
Kilian for technical assistance, Ugur Yalcin, Katrin Anczok and Viktor Schnabel
for help with the image analysis, Vinzenz Link for programming Excel Macros and
Harald Brush-Janovjak for extensive reviews of the statistics part of this work.
We are grateful to Kurt Anderson and Jan Peychl for help with the confocal microscopy.
P.J.H., E.V. and D.R.S. are supported by NIH grant HD-18577, The W.M Keck Foundation
and the Developmental Studies Hybridoma Bank(DSHB), P.J.H. by The American Cancer
Society (grant # PF-01-110-01-CSM),M.L.C. and S.W.W. by the Wellcome Trust, M.T.
by an MRC Career Development Award, and F.U. and C.P.H. by an Emmy-Noether-Fellowship
from the DFG.'
article_processing_charge: No
article_type: original
author:
- first_name: Florian
full_name: Ulrich, Florian
last_name: Ulrich
- first_name: Miguel
full_name: Concha, Miguel
last_name: Concha
- first_name: Paul
full_name: Heid, Paul
last_name: Heid
- first_name: Ed
full_name: Voss, Ed
last_name: Voss
- first_name: Sabine
full_name: Witzel, Sabine
last_name: Witzel
- first_name: Henry
full_name: Roehl, Henry
last_name: Roehl
- first_name: Masazumi
full_name: Tada, Masazumi
last_name: Tada
- first_name: Stephen
full_name: Wilson, Stephen
last_name: Wilson
- first_name: Richard
full_name: Adams, Richard
last_name: Adams
- first_name: David
full_name: Soll, David
last_name: Soll
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Ulrich F, Concha M, Heid P, et al. Slb/Wnt11 controls hypoblast cell migration
and morphogenesis at the onset of zebrafish gastrulation. Development.
2003;130(22):5375-5384. doi:10.1242/dev.00758
apa: Ulrich, F., Concha, M., Heid, P., Voss, E., Witzel, S., Roehl, H., … Heisenberg,
C.-P. J. (2003). Slb/Wnt11 controls hypoblast cell migration and morphogenesis
at the onset of zebrafish gastrulation. Development. Company of Biologists.
https://doi.org/10.1242/dev.00758
chicago: Ulrich, Florian, Miguel Concha, Paul Heid, Ed Voss, Sabine Witzel, Henry
Roehl, Masazumi Tada, et al. “Slb/Wnt11 Controls Hypoblast Cell Migration and
Morphogenesis at the Onset of Zebrafish Gastrulation.” Development. Company
of Biologists, 2003. https://doi.org/10.1242/dev.00758.
ieee: F. Ulrich et al., “Slb/Wnt11 controls hypoblast cell migration and
morphogenesis at the onset of zebrafish gastrulation,” Development, vol.
130, no. 22. Company of Biologists, pp. 5375–5384, 2003.
ista: Ulrich F, Concha M, Heid P, Voss E, Witzel S, Roehl H, Tada M, Wilson S, Adams
R, Soll D, Heisenberg C-PJ. 2003. Slb/Wnt11 controls hypoblast cell migration
and morphogenesis at the onset of zebrafish gastrulation. Development. 130(22),
5375–5384.
mla: Ulrich, Florian, et al. “Slb/Wnt11 Controls Hypoblast Cell Migration and Morphogenesis
at the Onset of Zebrafish Gastrulation.” Development, vol. 130, no. 22,
Company of Biologists, 2003, pp. 5375–84, doi:10.1242/dev.00758.
short: F. Ulrich, M. Concha, P. Heid, E. Voss, S. Witzel, H. Roehl, M. Tada, S.
Wilson, R. Adams, D. Soll, C.-P.J. Heisenberg, Development 130 (2003) 5375–5384.
date_created: 2018-12-11T12:07:13Z
date_published: 2003-11-15T00:00:00Z
date_updated: 2024-02-27T10:14:21Z
day: '15'
doi: 10.1242/dev.00758
extern: '1'
external_id:
pmid:
- ' PMC1414802'
fulldoi: https://doi.org/10.1242/dev.00758
intvolume: ' 130'
issue: '22'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1414802/
month: '11'
oa: 1
oa_version: None
page: 5375 - 5384
pmid: 1
publication: Development
publication_identifier:
issn:
- 1011-6370
publication_status: published
publisher: Company of Biologists
publist_id: '1975'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Slb/Wnt11 controls hypoblast cell migration and morphogenesis at the onset
of zebrafish gastrulation
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 130
year: '2003'
...
---
_id: '4168'
abstract:
- lang: eng
text: Recent studies show that signaling through integrin receptors is required
for normal cell movements during Xenopus gastrulation. Integrins function in this
process by modulating the activity of cadherin adhesion molecules within tissues
undergoing convergence and extension movements.
article_processing_charge: No
article_type: original
author:
- first_name: Juan
full_name: Montero, Juan
last_name: Montero
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Montero J, Heisenberg C-PJ. Adhesive crosstalk in gastrulation. Developmental
Cell. 2003;5(2):190-191. doi:10.1016/S1534-5807(03)00235-1
apa: Montero, J., & Heisenberg, C.-P. J. (2003). Adhesive crosstalk in gastrulation.
Developmental Cell. Cell Press. https://doi.org/10.1016/S1534-5807(03)00235-1
chicago: Montero, Juan, and Carl-Philipp J Heisenberg. “Adhesive Crosstalk in Gastrulation.”
Developmental Cell. Cell Press, 2003. https://doi.org/10.1016/S1534-5807(03)00235-1.
ieee: J. Montero and C.-P. J. Heisenberg, “Adhesive crosstalk in gastrulation,”
Developmental Cell, vol. 5, no. 2. Cell Press, pp. 190–191, 2003.
ista: Montero J, Heisenberg C-PJ. 2003. Adhesive crosstalk in gastrulation. Developmental
Cell. 5(2), 190–191.
mla: Montero, Juan, and Carl-Philipp J. Heisenberg. “Adhesive Crosstalk in Gastrulation.”
Developmental Cell, vol. 5, no. 2, Cell Press, 2003, pp. 190–91, doi:10.1016/S1534-5807(03)00235-1.
short: J. Montero, C.-P.J. Heisenberg, Developmental Cell 5 (2003) 190–191.
date_created: 2018-12-11T12:07:21Z
date_published: 2003-08-01T00:00:00Z
date_updated: 2024-02-27T09:54:53Z
day: '01'
doi: 10.1016/S1534-5807(03)00235-1
extern: '1'
external_id:
pmid:
- '12919669 '
fulldoi: https://doi.org/10.1016/S1534-5807(03)00235-1
intvolume: ' 5'
issue: '2'
language:
- iso: eng
month: '08'
oa_version: None
page: 190 - 191
pmid: 1
publication: Developmental Cell
publication_identifier:
eissn:
- 1878-1551
issn:
- 1534-5807
publication_status: published
publisher: Cell Press
publist_id: '1949'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Adhesive crosstalk in gastrulation
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 5
year: '2003'
...
---
_id: '4169'
abstract:
- lang: eng
text: 'Background: During vertebrate gastrulation, cell polarization and migration
are core components in the cellular rearrangements that lead to the formation
of the three germ layers, ectoderm, mesoderm, and endoderm. Previous studies have
implicated the Wnt/planar cell polarity (PCP) signaling pathway in controlling
cell morphology and movement during gastrulation. However, cell polarization and
directed cell migration are reduced but not completely abolished in the absence
of Wnt/PCP signals; this observation indicates that other signaling pathways must
be involved. Results: We show that Phosphoinositide 3-Kinases (PI3Ks) are required
at the onset of zebrafish gastrulation in mesendodermal cells for process formation
and cell polarization. Platelet Derived Growth Factor (PDGF) functions upstream
of PI3K, while Protein Kinase B (PKB), a downstream effector of PI3K activity,
localizes to the leading edge of migrating mesendodermal cells. In the absence
of PI3K activity, PKB localization and cell polarization are strongly reduced
in mesendodermal cells and are followed by slower but still highly coordinated
and directed movements of these cells. Conclusions: We have identified a novel
role of a signaling pathway comprised of PDGF, PI3K, and PKB in the control of
morphogenetic cell movements during gastrulation. Furthermore, our findings provide
insight into the relationship between cell polarization and directed cell migration
at the onset of zebrafish gastrulation.'
acknowledgement: 'We would like to thank Jennifer Geiger, Juan Hurl& Hannu Mansu-koski,
Florian Raible, Marino Zerial, Steve Wilson, and Kurt Anderson for critical reading
of earlier versions of this manuscript. We thank Erez Raz, Bart Vanhaesebroeck,
and Lukas Roth for sending us the pCS2-PH-GFP-nos, the p1IOCAAX, and the pCS2-actin-GFP
constructs, respectively. We are grateful to Marino Zerial and his lab for encouraging
us to start this work and providing us with the dnP13K construct and to Florian
Ulrich and Franziska Friedrich for help with the confocal microscope and artwork,
respectively. We thank Gunter Junghanns and Evelyn Lehmann for excellent fish care.
C.-P.H. is supported by an Emmy-Noother-Fellowship from the Deutsche Forschungsgemeinschaft. '
article_processing_charge: No
article_type: original
author:
- first_name: Juan
full_name: Montero, Juan
last_name: Montero
- first_name: Beate
full_name: Kilian, Beate
last_name: Kilian
- first_name: Joanne
full_name: Chan, Joanne
last_name: Chan
- first_name: Peter
full_name: Bayliss, Peter
last_name: Bayliss
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Montero J, Kilian B, Chan J, Bayliss P, Heisenberg C-PJ. Phosphoinositide 3-kinase
is required for process outgrowth and cell polarization of gastrulating mesendodermal
cells. Current Biology. 2003;13(15):1279-1289. doi:10.1016/S0960-9822(03)00505-0
apa: Montero, J., Kilian, B., Chan, J., Bayliss, P., & Heisenberg, C.-P. J.
(2003). Phosphoinositide 3-kinase is required for process outgrowth and cell polarization
of gastrulating mesendodermal cells. Current Biology. Cell Press. https://doi.org/10.1016/S0960-9822(03)00505-0
chicago: Montero, Juan, Beate Kilian, Joanne Chan, Peter Bayliss, and Carl-Philipp
J Heisenberg. “Phosphoinositide 3-Kinase Is Required for Process Outgrowth and
Cell Polarization of Gastrulating Mesendodermal Cells.” Current Biology.
Cell Press, 2003. https://doi.org/10.1016/S0960-9822(03)00505-0.
ieee: J. Montero, B. Kilian, J. Chan, P. Bayliss, and C.-P. J. Heisenberg, “Phosphoinositide
3-kinase is required for process outgrowth and cell polarization of gastrulating
mesendodermal cells,” Current Biology, vol. 13, no. 15. Cell Press, pp.
1279–1289, 2003.
ista: Montero J, Kilian B, Chan J, Bayliss P, Heisenberg C-PJ. 2003. Phosphoinositide
3-kinase is required for process outgrowth and cell polarization of gastrulating
mesendodermal cells. Current Biology. 13(15), 1279–1289.
mla: Montero, Juan, et al. “Phosphoinositide 3-Kinase Is Required for Process Outgrowth
and Cell Polarization of Gastrulating Mesendodermal Cells.” Current Biology,
vol. 13, no. 15, Cell Press, 2003, pp. 1279–89, doi:10.1016/S0960-9822(03)00505-0.
short: J. Montero, B. Kilian, J. Chan, P. Bayliss, C.-P.J. Heisenberg, Current Biology
13 (2003) 1279–1289.
date_created: 2018-12-11T12:07:22Z
date_published: 2003-08-05T00:00:00Z
date_updated: 2024-02-27T10:03:37Z
day: '05'
doi: 10.1016/S0960-9822(03)00505-0
extern: '1'
external_id:
pmid:
- ' 12906787'
fulldoi: https://doi.org/10.1016/S0960-9822(03)00505-0
intvolume: ' 13'
issue: '15'
language:
- iso: eng
month: '08'
oa_version: None
page: 1279 - 1289
pmid: 1
publication: Current Biology
publication_identifier:
eissn:
- 1879-0445
issn:
- 0960-9822
publication_status: published
publisher: Cell Press
publist_id: '1950'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Phosphoinositide 3-kinase is required for process outgrowth and cell polarization
of gastrulating mesendodermal cells
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 13
year: '2003'
...
---
_id: '4185'
abstract:
- lang: eng
text: Wnt genes play important roles in regulating patterning and morphogenesis
during vertebrate gastrulation. In zebrafish, slb/wnt11 is required for convergence
and extension movements, but not cell fate specification during gastrulation.
To determine if other Wnt genes functionally interact with slb/wnt11, we analysed
the role of ppt/wnt5 during zebrafish gastrulation. ppt/wnt5 is maternally provided
and zygotically expressed at all stages during gastrulation. The analysis of ppt
mutant embryos reveals that Ppt/Wnt5 regulates cell elongation and convergent
extension movements in posterior regions of the gastrula, while its function in
more anterior regions is largely redundant to that of Slb/Wnt11. Frizzled-2 functions
downstream of ppt/wnt5, indicating that it might act as a receptor for Ppt/Wnt5
in this process. The characterisation of the role of Ppt/Wnt5 provides insight
into the functional diversity of Wnt genes in regulating vertebrate gastrulation
movements. (C) 2003 Elsevier Science Ireland Ltd. All rights reserved.
acknowledgement: We thank Michael Brand, Florian Raible, Gerlinde Reim, Tobias Langenberg,
Jennifer Geiger and Kate Poole for helpful comments on earlier versions of this
manuscript. We are grateful to Henry Roehl and Christiane Nüsslein Volhard for sending
us the ppt mutant stock. M.T. was supported by a Career Development Fellowship from
the MRC. B.K., H.M. and C.P.H. are supported by an Emmy Noether-Fellowship from
the DFG.
article_processing_charge: No
article_type: original
author:
- first_name: Beate
full_name: Kilian, Beate
last_name: Kilian
- first_name: Hannu
full_name: Mansukoski, Hannu
last_name: Mansukoski
- first_name: Filipa
full_name: Barbosa, Filipa
last_name: Barbosa
- first_name: Florian
full_name: Ulrich, Florian
last_name: Ulrich
- first_name: Masazumi
full_name: Tada, Masazumi
last_name: Tada
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Kilian B, Mansukoski H, Barbosa F, Ulrich F, Tada M, Heisenberg C-PJ. The role
of Ppt/Wnt5 in regulating cell shape and movement during zebrafish gastrulation.
Mechanisms of Development. 2003;120(4):467-476. doi:10.1016/S0925-4773(03)00004-2
apa: Kilian, B., Mansukoski, H., Barbosa, F., Ulrich, F., Tada, M., & Heisenberg,
C.-P. J. (2003). The role of Ppt/Wnt5 in regulating cell shape and movement during
zebrafish gastrulation. Mechanisms of Development. Elsevier. https://doi.org/10.1016/S0925-4773(03)00004-2
chicago: Kilian, Beate, Hannu Mansukoski, Filipa Barbosa, Florian Ulrich, Masazumi
Tada, and Carl-Philipp J Heisenberg. “The Role of Ppt/Wnt5 in Regulating Cell
Shape and Movement during Zebrafish Gastrulation.” Mechanisms of Development.
Elsevier, 2003. https://doi.org/10.1016/S0925-4773(03)00004-2.
ieee: B. Kilian, H. Mansukoski, F. Barbosa, F. Ulrich, M. Tada, and C.-P. J. Heisenberg,
“The role of Ppt/Wnt5 in regulating cell shape and movement during zebrafish gastrulation,”
Mechanisms of Development, vol. 120, no. 4. Elsevier, pp. 467–476, 2003.
ista: Kilian B, Mansukoski H, Barbosa F, Ulrich F, Tada M, Heisenberg C-PJ. 2003.
The role of Ppt/Wnt5 in regulating cell shape and movement during zebrafish gastrulation.
Mechanisms of Development. 120(4), 467–476.
mla: Kilian, Beate, et al. “The Role of Ppt/Wnt5 in Regulating Cell Shape and Movement
during Zebrafish Gastrulation.” Mechanisms of Development, vol. 120, no.
4, Elsevier, 2003, pp. 467–76, doi:10.1016/S0925-4773(03)00004-2.
short: B. Kilian, H. Mansukoski, F. Barbosa, F. Ulrich, M. Tada, C.-P.J. Heisenberg,
Mechanisms of Development 120 (2003) 467–476.
date_created: 2018-12-11T12:07:27Z
date_published: 2003-04-01T00:00:00Z
date_updated: 2024-02-27T09:46:39Z
day: '01'
doi: 10.1016/S0925-4773(03)00004-2
extern: '1'
external_id:
pmid:
- '12676324 '
fulldoi: https://doi.org/10.1016/S0925-4773(03)00004-2
intvolume: ' 120'
issue: '4'
language:
- iso: eng
month: '04'
oa_version: None
page: 467 - 476
pmid: 1
publication: Mechanisms of Development
publication_identifier:
issn:
- 0925-4773
publication_status: published
publisher: Elsevier
publist_id: '1934'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The role of Ppt/Wnt5 in regulating cell shape and movement during zebrafish
gastrulation
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 120
year: '2003'
...
---
_id: '4254'
abstract:
- lang: eng
text: Chromosomal rearrangements can promote reproductive isolation by reducing
recombination along a large section of the genome. We model the effects of the
genetic barrier to gene flow caused by a chromosomal rearrangement on the rate
of accumulation of postzygotic isolation genes in parapatry. We find that, if
reproductive isolation is produced by the accumulation in parapatry of sets of
alleles compatible within but incompatible across species, chromosomal rearrangements
are far more likely to favor it than classical genetic barriers without chromosomal
changes. New evidence of the role of chromosomal rearrangements in parapatric
speciation suggests that postzygotic isolation is often due to the accumulation
of such incompatibilities. The model makes testable qualitative predictions about
the genetic signature of speciation.
acknowledgement: "We thank A. Andrés, C. Bartolomé, J. Bertranpetit, F. Calafell,
B. Charlesworth, D. Charlesworth, F. Depaulis, S. Gavrilets, T. Johnson, P. Keightley,
M. Kirkpatrik, A. Kondrashov, H. Laayouni, X. Maside, M. Noor, D. Ortiz-Barrientos,\r\nL.
Rieseberg, and T. Vines for valuable discussion and criticism. The detailed comments
of B. Charlesworth, D. Charlesworth, and F. Depaulis greatly improved the original
manuscript. AN is particularly grateful to X. Maside, who was a patient guide through
the jungle of speciation. This work was supported by the NERC grant GR3/11635 (United
Kingdom). AN is funded by the Ramón y Cajal Program (Spain)."
article_processing_charge: No
article_type: original
author:
- first_name: Arcadio
full_name: Navarro, Arcadio
last_name: Navarro
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: 'Navarro A, Barton NH. Accumulating postzygotic isolation genes in parapatry:
a new twist on chromosomal speciation. Evolution; International Journal of
Organic Evolution. 2003;57(3):447-459. doi:10.1111/j.0014-3820.2003.tb01537.x'
apa: 'Navarro, A., & Barton, N. H. (2003). Accumulating postzygotic isolation
genes in parapatry: a new twist on chromosomal speciation. Evolution; International
Journal of Organic Evolution. Wiley-Blackwell. https://doi.org/10.1111/j.0014-3820.2003.tb01537.x'
chicago: 'Navarro, Arcadio, and Nicholas H Barton. “Accumulating Postzygotic Isolation
Genes in Parapatry: A New Twist on Chromosomal Speciation.” Evolution; International
Journal of Organic Evolution. Wiley-Blackwell, 2003. https://doi.org/10.1111/j.0014-3820.2003.tb01537.x.'
ieee: 'A. Navarro and N. H. Barton, “Accumulating postzygotic isolation genes in
parapatry: a new twist on chromosomal speciation,” Evolution; International
Journal of Organic Evolution, vol. 57, no. 3. Wiley-Blackwell, pp. 447–459,
2003.'
ista: 'Navarro A, Barton NH. 2003. Accumulating postzygotic isolation genes in parapatry:
a new twist on chromosomal speciation. Evolution; International Journal of Organic
Evolution. 57(3), 447–459.'
mla: 'Navarro, Arcadio, and Nicholas H. Barton. “Accumulating Postzygotic Isolation
Genes in Parapatry: A New Twist on Chromosomal Speciation.” Evolution; International
Journal of Organic Evolution, vol. 57, no. 3, Wiley-Blackwell, 2003, pp. 447–59,
doi:10.1111/j.0014-3820.2003.tb01537.x.'
short: A. Navarro, N.H. Barton, Evolution; International Journal of Organic Evolution
57 (2003) 447–459.
date_created: 2018-12-11T12:07:52Z
date_published: 2003-03-01T00:00:00Z
date_updated: 2024-01-23T10:21:57Z
day: '01'
doi: 10.1111/j.0014-3820.2003.tb01537.x
extern: '1'
external_id:
pmid:
- '12703935 '
fulldoi: https://doi.org/10.1111/j.0014-3820.2003.tb01537.x
intvolume: ' 57'
issue: '3'
language:
- iso: eng
month: '03'
oa_version: None
page: 447 - 459
pmid: 1
publication: Evolution; International Journal of Organic Evolution
publication_identifier:
issn:
- 0014-3820
publication_status: published
publisher: Wiley-Blackwell
publist_id: '1840'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Accumulating postzygotic isolation genes in parapatry: a new twist on chromosomal
speciation'
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 57
year: '2003'
...
---
_id: '4255'
abstract:
- lang: eng
text: 'Humans and their closest evolutionary relatives, the chimpanzees, differ
in ∼1.24% of their genomic DNA sequences. The fraction of these changes accumulated
during the speciation processes that have separated the two lineages may be of
special relevance in understanding the basis of their differences. We analyzed
human and chimpanzee sequence data to search for the patterns of divergence and
polymorphism predicted by a theoretical model of speciation. According to the
model, positively selected changes should accumulate in chromosomes that present
fixed structural differences, such as inversions, between the two species. Protein
evolution was more than 2.2 times faster in chromosomes that had undergone structural
rearrangements compared with colinear chromosomes. Also, nucleotide variability
is slightly lower in rearranged chromosomes. These patterns of divergence and
polymorphism may be, at least in part, the molecular footprint of speciation events
in the human and chimpanzee lineages. '
article_processing_charge: No
article_type: original
author:
- first_name: Arcadio
full_name: Navarro, Arcadio
last_name: Navarro
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Navarro A, Barton NH. Chromosomal speciation and molecular divergence -- Accelerated
evolution in rearranged chromosomes. Science. 2003;300(5617):321-324. doi:10.1126/science.1080600
apa: Navarro, A., & Barton, N. H. (2003). Chromosomal speciation and molecular
divergence -- Accelerated evolution in rearranged chromosomes. Science.
American Association for the Advancement of Science. https://doi.org/10.1126/science.1080600
chicago: Navarro, Arcadio, and Nicholas H Barton. “Chromosomal Speciation and Molecular
Divergence -- Accelerated Evolution in Rearranged Chromosomes.” Science.
American Association for the Advancement of Science, 2003. https://doi.org/10.1126/science.1080600 .
ieee: A. Navarro and N. H. Barton, “Chromosomal speciation and molecular divergence
-- Accelerated evolution in rearranged chromosomes,” Science, vol. 300,
no. 5617. American Association for the Advancement of Science, pp. 321–324, 2003.
ista: Navarro A, Barton NH. 2003. Chromosomal speciation and molecular divergence
-- Accelerated evolution in rearranged chromosomes. Science. 300(5617), 321–324.
mla: Navarro, Arcadio, and Nicholas H. Barton. “Chromosomal Speciation and Molecular
Divergence -- Accelerated Evolution in Rearranged Chromosomes.” Science,
vol. 300, no. 5617, American Association for the Advancement of Science, 2003,
pp. 321–24, doi:10.1126/science.1080600
.
short: A. Navarro, N.H. Barton, Science 300 (2003) 321–324.
date_created: 2018-12-11T12:07:53Z
date_published: 2003-04-11T00:00:00Z
date_updated: 2024-02-26T13:37:51Z
day: '11'
doi: '10.1126/science.1080600 '
extern: '1'
external_id:
pmid:
- ' 12690198'
fulldoi: 'https://doi.org/10.1126/science.1080600 '
intvolume: ' 300'
issue: '5617'
language:
- iso: eng
month: '04'
oa_version: None
page: 321 - 324
pmid: 1
publication: Science
publication_identifier:
issn:
- 0036-8075
publication_status: published
publisher: American Association for the Advancement of Science
publist_id: '1841'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Chromosomal speciation and molecular divergence -- Accelerated evolution in
rearranged chromosomes
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 300
year: '2003'
...
---
_id: '4256'
abstract:
- lang: eng
text: Artificial Life models may shed new light on the long-standing challenge for
evolutionary biology of explaining the origins of complex organs. Real progress
on this issue, however, requires Artificial Life researchers to take seriously
the tools and insights from population genetics.
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Willem
full_name: Zuidema, Willem
last_name: Zuidema
citation:
ama: Barton NH, Zuidema W. The erratic path towards complexity. Current Biology.
2003;13(16):R649-R651. doi:10.1016/S0960-9822(03)00573-6
apa: Barton, N. H., & Zuidema, W. (2003). The erratic path towards complexity.
Current Biology. Cell Press. https://doi.org/10.1016/S0960-9822(03)00573-6
chicago: Barton, Nicholas H, and Willem Zuidema. “The Erratic Path towards Complexity.”
Current Biology. Cell Press, 2003. https://doi.org/10.1016/S0960-9822(03)00573-6.
ieee: N. H. Barton and W. Zuidema, “The erratic path towards complexity,” Current
Biology, vol. 13, no. 16. Cell Press, pp. R649–R651, 2003.
ista: Barton NH, Zuidema W. 2003. The erratic path towards complexity. Current Biology.
13(16), R649–R651.
mla: Barton, Nicholas H., and Willem Zuidema. “The Erratic Path towards Complexity.”
Current Biology, vol. 13, no. 16, Cell Press, 2003, pp. R649–51, doi:10.1016/S0960-9822(03)00573-6.
short: N.H. Barton, W. Zuidema, Current Biology 13 (2003) R649–R651.
date_created: 2018-12-11T12:07:53Z
date_published: 2003-08-19T00:00:00Z
date_updated: 2024-01-23T09:41:33Z
day: '19'
doi: 10.1016/S0960-9822(03)00573-6
extern: '1'
fulldoi: https://doi.org/10.1016/S0960-9822(03)00573-6
intvolume: ' 13'
issue: '16'
language:
- iso: eng
month: '08'
oa_version: Published Version
page: R649 - R651
publication: Current Biology
publication_identifier:
issn:
- 0960-9822
publication_status: published
publisher: Cell Press
publist_id: '1838'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The erratic path towards complexity
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 13
year: '2003'
...
---
_id: '4257'
abstract:
- lang: eng
text: Variation within a species may be structured both geographically and by genetic
background. We review the effects of such structuring on neutral variants, using
a framework based on the coalescent process. Short-term effects of sex differences
and age structure can be averaged out using fast timescale approximations, allowing
a simple general treatment of effective population size and migration. We consider
the effects of geographic structure on variation within and between local populations,
first in general terms, and then for specific migration models. We discuss the
close parallels between geographic structure and stable types of genetic structure
caused by selection, including balancing selection and background selection. The
effects of departures from stability, such as selective sweeps and population
bottlenecks, are also described. Methods for distinguishing population history
from the effects of ongoing gene flow are discussed. We relate the theoretical
results to observed patterns of variation in natural populations.
article_processing_charge: No
article_type: original
author:
- first_name: Brian
full_name: Charlesworth, Brian
last_name: Charlesworth
- first_name: Deborah
full_name: Charlesworth, Deborah
last_name: Charlesworth
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Charlesworth B, Charlesworth D, Barton NH. The effects of genetic and geographic
structure on neutral variation. Annual Review of Ecology and Systematics.
2003;34:99-125. doi:10.1146/annurev.ecolsys.34.011802.132359
apa: Charlesworth, B., Charlesworth, D., & Barton, N. H. (2003). The effects
of genetic and geographic structure on neutral variation. Annual Review of
Ecology and Systematics. Annual Reviews. https://doi.org/10.1146/annurev.ecolsys.34.011802.132359
chicago: Charlesworth, Brian, Deborah Charlesworth, and Nicholas H Barton. “The
Effects of Genetic and Geographic Structure on Neutral Variation.” Annual Review
of Ecology and Systematics. Annual Reviews, 2003. https://doi.org/10.1146/annurev.ecolsys.34.011802.132359.
ieee: B. Charlesworth, D. Charlesworth, and N. H. Barton, “The effects of genetic
and geographic structure on neutral variation,” Annual Review of Ecology and
Systematics, vol. 34. Annual Reviews, pp. 99–125, 2003.
ista: Charlesworth B, Charlesworth D, Barton NH. 2003. The effects of genetic and
geographic structure on neutral variation. Annual Review of Ecology and Systematics.
34, 99–125.
mla: Charlesworth, Brian, et al. “The Effects of Genetic and Geographic Structure
on Neutral Variation.” Annual Review of Ecology and Systematics, vol. 34,
Annual Reviews, 2003, pp. 99–125, doi:10.1146/annurev.ecolsys.34.011802.132359.
short: B. Charlesworth, D. Charlesworth, N.H. Barton, Annual Review of Ecology and
Systematics 34 (2003) 99–125.
date_created: 2018-12-11T12:07:53Z
date_published: 2003-11-01T00:00:00Z
date_updated: 2024-01-23T10:15:44Z
day: '01'
doi: 10.1146/annurev.ecolsys.34.011802.132359
extern: '1'
fulldoi: https://doi.org/10.1146/annurev.ecolsys.34.011802.132359
intvolume: ' 34'
language:
- iso: eng
month: '11'
oa_version: None
page: 99 - 125
publication: Annual Review of Ecology and Systematics
publication_identifier:
issn:
- 1543-592X
publication_status: published
publisher: Annual Reviews
publist_id: '1839'
quality_controlled: '1'
status: public
title: The effects of genetic and geographic structure on neutral variation
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 34
year: '2003'
...
---
_id: '4338'
abstract:
- lang: eng
text: 'Mosaic hybrid zones arise when ecologically differentiated taxa hybridize
across a network of habitat patches. Frequent interbreeding across a small-scale
patchwork can erode species differences that might have been preserved in a clinal
hybrid zone. In particular, the rapid breakdown of neutral divergence sets an
upper limit to the time for which differences at marker loci can persist. We present
here a case study of a mosaic hybrid zone between the fire-bellied toads Bombina
bombina and B. variegata (Anura: Discoglossidae) near Apahida in Romania. In our
20 × 20 km study area, we detected no evidence of a clinal transition but found
a strong association between aquatic habitat and mean allele frequencies at four
molecular markers. In particular, pure populations of B. bombina in ponds appear
to cause massive introgression into the surrounding B. variegata gene pool found
in temporary aquatic sites. Nevertheless, the genetic structure of these hybrid
populations was remarkably similar to those of a previously studied transect near
Pescenica (Croatia), which had both clinal and mosaic features: estimates of heterozygote
deficit and linkage disequilibrium in each country are similar. In Apahida, the
observed strong linkage disequilibria should stem from an imperfect habitat preference
that guides most (but not all) adults into the habitats to which they are adapted.
In the absence of a clinal structure, the inferred migration rate between habitats
implies that associations between selected loci and neutral markers should break
down rapidly. Although plausible selection strengths can maintain differentiation
at those loci adapting the toads to either permanent or temporary breeding sites,
the divergence at neutral markers must be transient. The hybrid zone may be approaching
a state in which the gene pools are homogenized at all but the selected loci,
not dissimilar from an early stage of sympatric divergence.'
acknowledgement: "We thank G. Mara and T. Galbena for enthusiastic field\r\nassistance,
A. Hofmann and R. Sieglstetter for access to their\r\nunpublished data, B. Fo¨rg-Brey
and G. Praetzel for help in\r\nthe lab. Helpful comments on a previous version of
the man-\r\nuscript were provided by R. Ennos, J. Szymura, F. Balloux,\r\nJ. Bridle,
L. Kruuk, F. Bonhomme, M. Arnold, and two anon-\r\nymous reviewers. We also thank
A. Pinggera for providing\r\nthe cover illustration. This work was supported by
Natural\r\nEnvironment Research Council studentships to THV and TRS\r\nand Deutsche
Forschungsgemeinschaft grant Nu 51/2-1 to BN."
article_processing_charge: No
article_type: original
author:
- first_name: Timothy
full_name: Vines, Timothy
last_name: Vines
- first_name: S C
full_name: Kohler, S C
last_name: Kohler
- first_name: M
full_name: Thiel, M
last_name: Thiel
- first_name: Ioan
full_name: Ghira, Ioan
last_name: Ghira
- first_name: T R
full_name: Sands, T R
last_name: Sands
- first_name: Catriona
full_name: Maccallum, Catriona
last_name: Maccallum
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Beate
full_name: Nürnberger, Beate
last_name: Nürnberger
citation:
ama: Vines T, Kohler SC, Thiel M, et al. On the maintenance of reproductive isolation
in a mosaic hybrid zone between the toads Bombina bombina and B. variegata. Evolution.
2003;57(8):1876-1888. doi:10.1111/j.0014-3820.2003.tb00595.x
apa: Vines, T., Kohler, S. C., Thiel, M., Ghira, I., Sands, T. R., Maccallum, C.,
… Nürnberger, B. (2003). On the maintenance of reproductive isolation in a mosaic
hybrid zone between the toads Bombina bombina and B. variegata. Evolution.
Wiley-Blackwell. https://doi.org/10.1111/j.0014-3820.2003.tb00595.x
chicago: Vines, Timothy, S C Kohler, M Thiel, Ioan Ghira, T R Sands, Catriona Maccallum,
Nicholas H Barton, and Beate Nürnberger. “On the Maintenance of Reproductive Isolation
in a Mosaic Hybrid Zone between the Toads Bombina Bombina and B. Variegata.” Evolution.
Wiley-Blackwell, 2003. https://doi.org/10.1111/j.0014-3820.2003.tb00595.x.
ieee: T. Vines et al., “On the maintenance of reproductive isolation in a
mosaic hybrid zone between the toads Bombina bombina and B. variegata,” Evolution,
vol. 57, no. 8. Wiley-Blackwell, pp. 1876–1888, 2003.
ista: Vines T, Kohler SC, Thiel M, Ghira I, Sands TR, Maccallum C, Barton NH, Nürnberger
B. 2003. On the maintenance of reproductive isolation in a mosaic hybrid zone
between the toads Bombina bombina and B. variegata. Evolution. 57(8), 1876–1888.
mla: Vines, Timothy, et al. “On the Maintenance of Reproductive Isolation in a Mosaic
Hybrid Zone between the Toads Bombina Bombina and B. Variegata.” Evolution,
vol. 57, no. 8, Wiley-Blackwell, 2003, pp. 1876–88, doi:10.1111/j.0014-3820.2003.tb00595.x.
short: T. Vines, S.C. Kohler, M. Thiel, I. Ghira, T.R. Sands, C. Maccallum, N.H.
Barton, B. Nürnberger, Evolution 57 (2003) 1876–1888.
date_created: 2018-12-11T12:08:20Z
date_published: 2003-08-01T00:00:00Z
date_updated: 2024-01-23T09:16:43Z
day: '01'
doi: 10.1111/j.0014-3820.2003.tb00595.x
extern: '1'
fulldoi: https://doi.org/10.1111/j.0014-3820.2003.tb00595.x
intvolume: ' 57'
issue: '8'
language:
- iso: eng
month: '08'
oa_version: None
page: 1876 - 1888
publication: Evolution
publication_identifier:
issn:
- 0014-3820
publication_status: published
publisher: Wiley-Blackwell
publist_id: '1692'
quality_controlled: '1'
scopus_import: '1'
status: public
title: On the maintenance of reproductive isolation in a mosaic hybrid zone between
the toads Bombina bombina and B. variegata
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 57
year: '2003'
...
---
_id: '17741'
abstract:
- lang: eng
text: The recent discovery of a Gunn-Peterson (GP) trough in the spectrum of the
redshift 6.28 SDSS quasar has raised the tantalizing possibility that we have
detected the reionization of the universe. However, a neutral fraction (of hydrogen)
as small as 0.1% is sufficient to cause the GP trough; hence, its detection alone
cannot rule out reionization at a much earlier epoch. The cosmic microwave background
(CMB) polarization anisotropy offers an alternative way to explore the dark age
of the universe. We show that for most models constrained by the current CMB data
and by the discovery of a GP trough (showing that reionization occurred at z >
6.3), Microwave Anisotropy Probe (MAP) can detect the reionization signature in
the polarization power spectrum. The expected 1 σ error on the measurement of
the electron optical depth is around 0.03 with a weak dependence on the value
of that optical depth. Such a constraint on the optical depth will allow MAP to
achieve a 1 σ error on the amplitude of the primordial power spectrum of 6%. MAP
with 2 yr (Planck with 1 yr) of observation can distinguish a model with 50% (6%)
partial ionization between redshifts of 6.3 and 20 from a model in which hydrogen
was completely neutral at redshifts greater than 6.3. Planck will be able to distinguish
between different reionization histories even when they imply the same optical
depth to electron scattering for the CMB photons.
article_processing_charge: No
article_type: original
author:
- first_name: Manoj
full_name: Kaplinghat, Manoj
last_name: Kaplinghat
- first_name: Mike
full_name: Chu, Mike
last_name: Chu
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Gilbert P.
full_name: Holder, Gilbert P.
last_name: Holder
- first_name: Lloyd
full_name: Knox, Lloyd
last_name: Knox
- first_name: Constantinos
full_name: Skordis, Constantinos
last_name: Skordis
citation:
ama: Kaplinghat M, Chu M, Haiman Z, Holder GP, Knox L, Skordis C. Probing the reionization
history of the universe using the cosmic microwave background polarization. The
Astrophysical Journal. 2003;583(1):24-32. doi:10.1086/344927
apa: Kaplinghat, M., Chu, M., Haiman, Z., Holder, G. P., Knox, L., & Skordis,
C. (2003). Probing the reionization history of the universe using the cosmic microwave
background polarization. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/344927
chicago: Kaplinghat, Manoj, Mike Chu, Zoltán Haiman, Gilbert P. Holder, Lloyd Knox,
and Constantinos Skordis. “Probing the Reionization History of the Universe Using
the Cosmic Microwave Background Polarization.” The Astrophysical Journal.
American Astronomical Society, 2003. https://doi.org/10.1086/344927.
ieee: M. Kaplinghat, M. Chu, Z. Haiman, G. P. Holder, L. Knox, and C. Skordis, “Probing
the reionization history of the universe using the cosmic microwave background
polarization,” The Astrophysical Journal, vol. 583, no. 1. American Astronomical
Society, pp. 24–32, 2003.
ista: Kaplinghat M, Chu M, Haiman Z, Holder GP, Knox L, Skordis C. 2003. Probing
the reionization history of the universe using the cosmic microwave background
polarization. The Astrophysical Journal. 583(1), 24–32.
mla: Kaplinghat, Manoj, et al. “Probing the Reionization History of the Universe
Using the Cosmic Microwave Background Polarization.” The Astrophysical Journal,
vol. 583, no. 1, American Astronomical Society, 2003, pp. 24–32, doi:10.1086/344927.
short: M. Kaplinghat, M. Chu, Z. Haiman, G.P. Holder, L. Knox, C. Skordis, The Astrophysical
Journal 583 (2003) 24–32.
date_created: 2024-09-06T09:25:08Z
date_published: 2003-01-20T00:00:00Z
date_updated: 2024-09-26T14:15:21Z
day: '20'
doi: 10.1086/344927
extern: '1'
fulldoi: https://doi.org/10.1086/344927
intvolume: ' 583'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/344927
month: '01'
oa: 1
oa_version: Published Version
page: 24-32
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Probing the reionization history of the universe using the cosmic microwave
background polarization
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 583
year: '2003'
...
---
_id: '17748'
abstract:
- lang: eng
text: 'Recent results by the WMAP satellite suggest that the intergalactic medium
was significantly reionized at redshifts as high as z~17. At this early epoch,
the first ionizing sources likely appeared in the shallow potential wells of mini-halos
with virial temperatures T < 10^4 K. Once such an ionizing source turns off, its
surrounding HII region Compton cools and recombines. Nonetheless, we show that
the ``fossil'''' HII regions left behind remain at high adiabats, prohibiting
gas accretion and cooling in subsequent generations of mini-halos. Thus, early
star formation is self-limiting. We quantify this effect to show that star formation
in mini-halos cannot account for the bulk of the electron scattering opacity measured
by WMAP, which must be due to more massive objects. We argue that gas entropy,
rather than IGM metallicity, regulates the evolution of the global ionizing emissivity,
and impedes full reionization until lower redshifts. We discuss several important
consequences of this early entropy floor for reionization. It reduces gas clumping,
curtailing the required photon budget for reionization. An entropy floor also
prevents H2 formation and cooling, due to reduced gas densities: it greatly enhances
feedback from UV photodissociation of H2. An early X-ray background would also
furnish an entropy floor to the entire IGM; thus, X-rays impede rather than enhance
H2 formation. Future 21cm observations may probe the topology of fossil HII regions.'
alternative_title:
- Fossil H ii regions
article_processing_charge: No
article_type: original
author:
- first_name: S. Peng
full_name: Oh, S. Peng
last_name: Oh
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Oh SP, Haiman Z. Fossil H ii regions: Self-limiting star formation at high
redshift. Monthly Notices of the Royal Astronomical Society. 2003;346(2):456-472.
doi:10.1046/j.1365-2966.2003.07103.x'
apa: 'Oh, S. P., & Haiman, Z. (2003). Fossil H ii regions: Self-limiting star
formation at high redshift. Monthly Notices of the Royal Astronomical Society.
Oxford University Press. https://doi.org/10.1046/j.1365-2966.2003.07103.x'
chicago: 'Oh, S. Peng, and Zoltán Haiman. “Fossil H Ii Regions: Self-Limiting Star
Formation at High Redshift.” Monthly Notices of the Royal Astronomical Society.
Oxford University Press, 2003. https://doi.org/10.1046/j.1365-2966.2003.07103.x.'
ieee: 'S. P. Oh and Z. Haiman, “Fossil H ii regions: Self-limiting star formation
at high redshift,” Monthly Notices of the Royal Astronomical Society, vol.
346, no. 2. Oxford University Press, pp. 456–472, 2003.'
ista: 'Oh SP, Haiman Z. 2003. Fossil H ii regions: Self-limiting star formation
at high redshift. Monthly Notices of the Royal Astronomical Society. 346(2), 456–472.'
mla: 'Oh, S. Peng, and Zoltán Haiman. “Fossil H Ii Regions: Self-Limiting Star Formation
at High Redshift.” Monthly Notices of the Royal Astronomical Society, vol.
346, no. 2, Oxford University Press, 2003, pp. 456–72, doi:10.1046/j.1365-2966.2003.07103.x.'
short: S.P. Oh, Z. Haiman, Monthly Notices of the Royal Astronomical Society 346
(2003) 456–472.
date_created: 2024-09-06T09:36:17Z
date_published: 2003-12-01T00:00:00Z
date_updated: 2024-09-26T15:00:48Z
day: '01'
doi: 10.1046/j.1365-2966.2003.07103.x
extern: '1'
fulldoi: https://doi.org/10.1046/j.1365-2966.2003.07103.x
intvolume: ' 346'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1046/j.1365-2966.2003.07103.x
month: '12'
oa: 1
oa_version: Published Version
page: 456-472
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Fossil H ii regions: Self-limiting star formation at high redshift'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 346
year: '2003'
...
---
_id: '17750'
abstract:
- lang: eng
text: We present the discovery of three new quasars at z>6 in 1300 deg^2 of SDSS
imaging data, J114816.64+525150.3 (z=6.43), J104845.05+463718.3 (z=6.23) and J163033.90+401209.6
(z=6.05). The first two objects have weak Ly alpha emission lines; their redshifts
are determined from the positions of the Lyman break. They are only accurate to
0.05 and could be affected by the presence of broad absorption line systems. The
last object has a Ly alpha strength more typical of lower redshift quasars. Based
on a sample of six quasars at z>5.7 that cover 2870 deg^2 presented in this paper
and in Paper I, we estimate the comoving density of luminous quasars at z 6 and
M_{1450} < -26.8 to be (8 +/- 3)x10^{-10} Mpc^{-3} (for H_0 = 50 km/s/Mpc, Omega
= 1). HST imaging of two z>5.7 quasars and high-resolution ground-based images
(seeing 0.4'') of three additional z>5.7 quasars show that none of them is gravitationally
lensed. The luminosity distribution of the high-redshfit quasar sample suggests
the bright end slope of the quasar luminosity function at z 6 is shallower than
Psi L^{-3.5} (2-sigma), consistent with the absence of strongly lensed objects.
article_processing_charge: No
article_type: original
author:
- first_name: Xiaohui
full_name: Fan, Xiaohui
last_name: Fan
- first_name: Michael A.
full_name: Strauss, Michael A.
last_name: Strauss
- first_name: Donald P.
full_name: Schneider, Donald P.
last_name: Schneider
- first_name: Robert H.
full_name: Becker, Robert H.
last_name: Becker
- first_name: Richard L.
full_name: White, Richard L.
last_name: White
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Michael
full_name: Gregg, Michael
last_name: Gregg
- first_name: Laura
full_name: Pentericci, Laura
last_name: Pentericci
- first_name: Eva K.
full_name: Grebel, Eva K.
last_name: Grebel
- first_name: Vijay K.
full_name: Narayanan, Vijay K.
last_name: Narayanan
- first_name: Yeong-Shang
full_name: Loh, Yeong-Shang
last_name: Loh
- first_name: Gordon T.
full_name: Richards, Gordon T.
last_name: Richards
- first_name: James E.
full_name: Gunn, James E.
last_name: Gunn
- first_name: Robert H.
full_name: Lupton, Robert H.
last_name: Lupton
- first_name: Gillian R.
full_name: Knapp, Gillian R.
last_name: Knapp
- first_name: Željko
full_name: Ivezić, Željko
last_name: Ivezić
- first_name: W. N.
full_name: Brandt, W. N.
last_name: Brandt
- first_name: Matthew
full_name: Collinge, Matthew
last_name: Collinge
- first_name: Lei
full_name: Hao, Lei
last_name: Hao
- first_name: Daniel
full_name: Harbeck, Daniel
last_name: Harbeck
- first_name: Francisco
full_name: Prada, Francisco
last_name: Prada
- first_name: Joop
full_name: Schaye, Joop
last_name: Schaye
- first_name: Iskra
full_name: Strateva, Iskra
last_name: Strateva
- first_name: Nadia
full_name: Zakamska, Nadia
last_name: Zakamska
- first_name: Scott
full_name: Anderson, Scott
last_name: Anderson
- first_name: Jon
full_name: Brinkmann, Jon
last_name: Brinkmann
- first_name: Neta A.
full_name: Bahcall, Neta A.
last_name: Bahcall
- first_name: Don Q.
full_name: Lamb, Don Q.
last_name: Lamb
- first_name: Sadanori
full_name: Okamura, Sadanori
last_name: Okamura
- first_name: Alex
full_name: Szalay, Alex
last_name: Szalay
- first_name: Donald G.
full_name: York, Donald G.
last_name: York
citation:
ama: Fan X, Strauss MA, Schneider DP, et al. A survey of z > 5.7 quasars in
the Sloan Digital Sky Survey. II. Discovery of three additional quasars at z >
6. The Astronomical Journal. 2003;125(4):1649-1659. doi:10.1086/368246
apa: Fan, X., Strauss, M. A., Schneider, D. P., Becker, R. H., White, R. L., Haiman,
Z., … York, D. G. (2003). A survey of z > 5.7 quasars in the Sloan Digital
Sky Survey. II. Discovery of three additional quasars at z > 6. The Astronomical
Journal. American Astronomical Society. https://doi.org/10.1086/368246
chicago: Fan, Xiaohui, Michael A. Strauss, Donald P. Schneider, Robert H. Becker,
Richard L. White, Zoltán Haiman, Michael Gregg, et al. “A Survey of z > 5.7
Quasars in the Sloan Digital Sky Survey. II. Discovery of Three Additional Quasars
at z > 6.” The Astronomical Journal. American Astronomical Society,
2003. https://doi.org/10.1086/368246.
ieee: X. Fan et al., “A survey of z > 5.7 quasars in the Sloan Digital
Sky Survey. II. Discovery of three additional quasars at z > 6,” The Astronomical
Journal, vol. 125, no. 4. American Astronomical Society, pp. 1649–1659, 2003.
ista: Fan X, Strauss MA, Schneider DP, Becker RH, White RL, Haiman Z, Gregg M, Pentericci
L, Grebel EK, Narayanan VK, Loh Y-S, Richards GT, Gunn JE, Lupton RH, Knapp GR,
Ivezić Ž, Brandt WN, Collinge M, Hao L, Harbeck D, Prada F, Schaye J, Strateva
I, Zakamska N, Anderson S, Brinkmann J, Bahcall NA, Lamb DQ, Okamura S, Szalay
A, York DG. 2003. A survey of z > 5.7 quasars in the Sloan Digital Sky Survey.
II. Discovery of three additional quasars at z > 6. The Astronomical Journal.
125(4), 1649–1659.
mla: Fan, Xiaohui, et al. “A Survey of z > 5.7 Quasars in the Sloan Digital
Sky Survey. II. Discovery of Three Additional Quasars at z > 6.” The Astronomical
Journal, vol. 125, no. 4, American Astronomical Society, 2003, pp. 1649–59,
doi:10.1086/368246.
short: X. Fan, M.A. Strauss, D.P. Schneider, R.H. Becker, R.L. White, Z. Haiman,
M. Gregg, L. Pentericci, E.K. Grebel, V.K. Narayanan, Y.-S. Loh, G.T. Richards,
J.E. Gunn, R.H. Lupton, G.R. Knapp, Ž. Ivezić, W.N. Brandt, M. Collinge, L. Hao,
D. Harbeck, F. Prada, J. Schaye, I. Strateva, N. Zakamska, S. Anderson, J. Brinkmann,
N.A. Bahcall, D.Q. Lamb, S. Okamura, A. Szalay, D.G. York, The Astronomical Journal
125 (2003) 1649–1659.
date_created: 2024-09-06T09:38:08Z
date_published: 2003-04-01T00:00:00Z
date_updated: 2024-09-30T07:33:02Z
day: '01'
doi: 10.1086/368246
extern: '1'
fulldoi: https://doi.org/10.1086/368246
intvolume: ' 125'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/368246
month: '04'
oa: 1
oa_version: Published Version
page: 1649-1659
publication: The Astronomical Journal
publication_identifier:
issn:
- 0004-6256
- 1538-3881
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: A survey of z > 5.7 quasars in the Sloan Digital Sky Survey. II. Discovery
of three additional quasars at z > 6
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 125
year: '2003'
...
---
_id: '17754'
abstract:
- lang: eng
text: 'The recent discovery of a high optical depth tau to Thomson scattering from
the WMAP data implies that significant reionization took place at redshifts z~15.
This discovery has important implications for the sources of reionization, and
allows, for the first time, constraints to be placed on physical reionization
scenarios out to redshift z~20. Using a new suite of semi-analytic reionization
models, we show that the high value of tau requires a surprisingly high efficiency
epsilon of the first generation of UV sources for injecting ionizing photons into
the intergalactic medium. We find that no simple reionization model can be consistent
with the combination of the WMAP result with data from the z<6.5 universe. Satisfying
both constraints requires either of the following: (i) H_2 molecules form efficiently
at z~20, survive feedback processes, and allow UV sources in halos with virial
temperatures below Tvir=10^4 K to contribute substantially to reionization, or
(ii) the efficiency epsilon in halos with Tvir>10^4K decreased by a factor of
~ 30 between (z~20) and (z~6). We discuss the relevant physical issues to produce
either scenario, and argue that both options are viable, and allowed by current
data. In detailed models of the reionization history, we find that the evolution
of the ionized fractions in the two scenarios have distinctive features that Planck
can distinguish at 3 sigma significance. At the high WMAP value for tau, Planck
will also be able to provide tight statistical constraints on reionization model
parameters, and elucidate much of the physics at the end of the Dark Ages. The
sources responsible for the high optical depth discovered by WMAP should be directly
detectable out to z~15 by the James Webb Space Telescope.'
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Gilbert P.
full_name: Holder, Gilbert P.
last_name: Holder
citation:
ama: Haiman Z, Holder GP. The reionization history at high redshifts. I. Physical
models and new constraints from cosmic microwave background polarization. The
Astrophysical Journal. 2003;595(1):1-12. doi:10.1086/377337
apa: Haiman, Z., & Holder, G. P. (2003). The reionization history at high redshifts.
I. Physical models and new constraints from cosmic microwave background polarization.
The Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/377337
chicago: Haiman, Zoltán, and Gilbert P. Holder. “The Reionization History at High
Redshifts. I. Physical Models and New Constraints from Cosmic Microwave Background
Polarization.” The Astrophysical Journal. American Astronomical Society,
2003. https://doi.org/10.1086/377337.
ieee: Z. Haiman and G. P. Holder, “The reionization history at high redshifts. I.
Physical models and new constraints from cosmic microwave background polarization,”
The Astrophysical Journal, vol. 595, no. 1. American Astronomical Society,
pp. 1–12, 2003.
ista: Haiman Z, Holder GP. 2003. The reionization history at high redshifts. I.
Physical models and new constraints from cosmic microwave background polarization.
The Astrophysical Journal. 595(1), 1–12.
mla: Haiman, Zoltán, and Gilbert P. Holder. “The Reionization History at High Redshifts.
I. Physical Models and New Constraints from Cosmic Microwave Background Polarization.”
The Astrophysical Journal, vol. 595, no. 1, American Astronomical Society,
2003, pp. 1–12, doi:10.1086/377337.
short: Z. Haiman, G.P. Holder, The Astrophysical Journal 595 (2003) 1–12.
date_created: 2024-09-06T09:42:24Z
date_published: 2003-09-20T00:00:00Z
date_updated: 2024-09-30T08:02:54Z
day: '20'
doi: 10.1086/377337
extern: '1'
fulldoi: https://doi.org/10.1086/377337
intvolume: ' 595'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/377337
month: '09'
oa: 1
oa_version: Published Version
page: 1-12
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: The reionization history at high redshifts. I. Physical models and new constraints
from cosmic microwave background polarization
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 595
year: '2003'
...