{"day":"02","department":[{"_id":"FrPe"}],"type":"journal_article","intvolume":"       227","issue":"6","publisher":"Elsevier","pmid":1,"scopus_import":"1","date_updated":"2026-03-09T10:19:45Z","volume":227,"status":"public","language":[{"iso":"eng"}],"acknowledgement":"We thank the KIOST staff of the Jeju Marine Research Center for assisting sample collection, the research assistants and students of the Yoon Idea Lab led by Prof. Dr. Tae-Hyun Yoon at Hanyang University for facilitating and assisting in ICP-MS test runs involved in a pilot study preceding this study, Ms. Garance Perrois and Mr. Léonard Pons for assistance with statistics-related questions, and the two anonymous reviewers for their valuable comments and suggestions. The study described in this article was partially supported by grants from the Brain Pool Program through NRF funded by the Ministry of Science and ICT (reference code: 2019H1D3A1A01070922 to ABJ), by the Ministry of Oceans and Fisheries (grant number RS-2024-00406249 to TK), by the Korea Institute of Marine Science and Technology (KIMST), funded by the Ministry of Oceans and Fisheries (grant number RS-2025-02304432 to TK), and by the Korea Institute of Ocean Science and Technology (PEA0404 to TK).","doi":"10.1016/j.marpolbul.2026.119493","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"issn":["002-5326X"],"eissn":["1879-3363"]},"year":"2026","OA_type":"closed access","publication_status":"published","_id":"21406","date_created":"2026-03-08T23:01:44Z","publication":"Marine Pollution Bulletin","article_number":"119493","date_published":"2026-03-02T00:00:00Z","title":"Ostracod shell chemistry as proxy for coastal marine conditions of a highly urbanized megacity (Hong Kong SAR) and an agro-centric oceanic province (Jeju Island, Republic of Korea) – a preliminary comparative analysis","external_id":{"pmid":["41774948"]},"article_type":"original","oa_version":"None","author":[{"full_name":"Jöst, Anna B.","first_name":"Anna B.","last_name":"Jöst"},{"last_name":"Rodriguez Moreno","id":"59bea3b2-8c82-11ef-a41a-af7b0efd9065","first_name":"Maximiliano J","full_name":"Rodriguez Moreno, Maximiliano J"},{"last_name":"Kim","first_name":"Taihun","full_name":"Kim, Taihun"},{"full_name":"Baker, David M.","first_name":"David M.","last_name":"Baker"},{"last_name":"Yasuhara","full_name":"Yasuhara, Moriaki","first_name":"Moriaki"},{"last_name":"Not","first_name":"Christelle A.","full_name":"Not, Christelle A."},{"last_name":"Karanovic","first_name":"Ivana","full_name":"Karanovic, Ivana"}],"month":"03","quality_controlled":"1","article_processing_charge":"No","citation":{"ista":"Jöst AB, Rodriguez Moreno MJ, Kim T, Baker DM, Yasuhara M, Not CA, Karanovic I. 2026. Ostracod shell chemistry as proxy for coastal marine conditions of a highly urbanized megacity (Hong Kong SAR) and an agro-centric oceanic province (Jeju Island, Republic of Korea) – a preliminary comparative analysis. Marine Pollution Bulletin. 227(6), 119493.","chicago":"Jöst, Anna B., Maximiliano J Rodriguez Moreno, Taihun Kim, David M. Baker, Moriaki Yasuhara, Christelle A. Not, and Ivana Karanovic. “Ostracod Shell Chemistry as Proxy for Coastal Marine Conditions of a Highly Urbanized Megacity (Hong Kong SAR) and an Agro-Centric Oceanic Province (Jeju Island, Republic of Korea) – a Preliminary Comparative Analysis.” <i>Marine Pollution Bulletin</i>. Elsevier, 2026. <a href=\"https://doi.org/10.1016/j.marpolbul.2026.119493\">https://doi.org/10.1016/j.marpolbul.2026.119493</a>.","short":"A.B. Jöst, M.J. Rodriguez Moreno, T. Kim, D.M. Baker, M. Yasuhara, C.A. Not, I. Karanovic, Marine Pollution Bulletin 227 (2026).","apa":"Jöst, A. B., Rodriguez Moreno, M. J., Kim, T., Baker, D. M., Yasuhara, M., Not, C. A., &#38; Karanovic, I. (2026). Ostracod shell chemistry as proxy for coastal marine conditions of a highly urbanized megacity (Hong Kong SAR) and an agro-centric oceanic province (Jeju Island, Republic of Korea) – a preliminary comparative analysis. <i>Marine Pollution Bulletin</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.marpolbul.2026.119493\">https://doi.org/10.1016/j.marpolbul.2026.119493</a>","mla":"Jöst, Anna B., et al. “Ostracod Shell Chemistry as Proxy for Coastal Marine Conditions of a Highly Urbanized Megacity (Hong Kong SAR) and an Agro-Centric Oceanic Province (Jeju Island, Republic of Korea) – a Preliminary Comparative Analysis.” <i>Marine Pollution Bulletin</i>, vol. 227, no. 6, 119493, Elsevier, 2026, doi:<a href=\"https://doi.org/10.1016/j.marpolbul.2026.119493\">10.1016/j.marpolbul.2026.119493</a>.","ieee":"A. B. Jöst <i>et al.</i>, “Ostracod shell chemistry as proxy for coastal marine conditions of a highly urbanized megacity (Hong Kong SAR) and an agro-centric oceanic province (Jeju Island, Republic of Korea) – a preliminary comparative analysis,” <i>Marine Pollution Bulletin</i>, vol. 227, no. 6. Elsevier, 2026.","ama":"Jöst AB, Rodriguez Moreno MJ, Kim T, et al. Ostracod shell chemistry as proxy for coastal marine conditions of a highly urbanized megacity (Hong Kong SAR) and an agro-centric oceanic province (Jeju Island, Republic of Korea) – a preliminary comparative analysis. <i>Marine Pollution Bulletin</i>. 2026;227(6). doi:<a href=\"https://doi.org/10.1016/j.marpolbul.2026.119493\">10.1016/j.marpolbul.2026.119493</a>"},"abstract":[{"lang":"eng","text":"This preliminary study investigates the trace-element composition of ostracod shells (Ostracoda: Crustacea) as biogenic calcium carbonates in their role as environmental sentinels of pollution. Using high-resolution in-situ analysis, we compared two contrasting coastal systems: the highly urbanized seascape of metropolitan megacity Hong Kong (HKSAR) and the agriculturally dominated waters of rural retreat Jeju Island, Republic of Korea (ROK). The goal was to assess whether anthropogenic stress gradients affect trace element-to‑calcium ratios (E/Ca) in the carapaces of shallow-marine Neonesidea Maddocks, 1969 species. Hereby, the focus is laid on potential differences in the effects of extreme urbanization and extreme agriculturalization. We analyzed 12 trace elements commonly incorporated into ostracod shells using Inductively Coupled Plasma–Mass Spectrometry (ICP-MS). Only Mn/Ca, Mg/Ca, and Ni/Ca ratios showed strong correlations with specific seawater physicochemical parameters. Notably, Mn/Ca differed significantly between the two sites, seemingly driven mainly by variations in nitrite nitrogen levels. This suggests that Mn incorporation is sensitive to pollution source, urban versus agricultural, though species-specific uptake effects cannot be excluded. No significant differences in elemental uptake were found between adult and A-1 juvenile stages of Neonesidea mutsuensis Ishizaki, 1961 or Neonesidea elegans (Brady, 1969), supporting the use of both age groups in environmental reconstructions and increasing potential sample yields. While remaining empirical and exploratory, our tentative findings suggest that ostracod geochemistry holds promise for marine pollution monitoring and cautiously supports the application of ostracod Mn/Ca ratios to reconstruct anthropogenic, particularly nitrogen-related, impacts in nearshore environments using sediment core records."}]}