Line Island Foraminifera – the ultimate stepping stone for the dispersal of species across the Pacific Ocean
Final Report Abstract
This project examined the spatial distribution and species richness studies of modern benthic foraminifera from the Line Islands, an isolated island chain located in the Central Pacific Ocean. The Line Islands constitute a chain of 11 atolls in the central Pacific Ocean. Situated in the Central Pacific Ocean, they rank among the most isolated islands in the world and hold a biogeographic key position. Due to their isolated location in the central tropical Pacific and comparatively difficult accessibility, the Line Islands include some of the least visited coral reefs on earth. To date, information on marine microbiota biodiversity in these atolls is almost nonexistent. To explore the role of the Line Islands in facilitating the dispersal and colonization of marine species across the vast expanse of the Pacific Ocean, we documented the composition, species richness, and structure of modern foraminiferal assemblages, and present the first fully illustrated catalog of shallow benthic foraminifera from the northern Line Islands. During the funding period we have identified a total of more than 25-thousand individuals and documented their distribution across six island. This resulted in a total of 140 species, and quadrupled the number of all taxa reported so far. Our study is based on 69 sediment samples from a total of 6 coral reef islands and atolls spanning ~6.8° latitude and ~5.2° longitude in the central Pacific Ocean (: Kingman Reef, Palmyra Atoll, Teraina Island (Washington), Tabuearan Atoll (Fanning), Kiritimati Atoll (Christmas), and Jarvis Island. Analysis of these data revealed statistically significant patterns of anthropogenic influence. Comparative studies of biogeographic distributions show that many tropical species are not dispersing further east and are not crossing the East Pacific Barrier.
Publications
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Assemblages of agglutinated foraminifera from Paleogene deposits of Western Siberia. Abstract Volume Eleventh International Workshop on Agglutinated Foraminifera (19-22 April 2023, Kraków, Poland). 2023. P. 77-78.
Trubin Y.S., Marinov V.A. & Langer M.R.
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Benthic assemblages from Paleogene shallow-water marine facies of Fergana Basin (Central Asia). 94. Jahrestagung der Paläontologischen Gesellschaft (18-22 September 2023, Jena, Germany). 2023. P. 88-89.
Trubin Y.S., Smirnov P.V., Kogan I., Wikler A. & Langer M.R.
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Benthic foraminifera as proxies to infer paleoenvironmental conditions: Case studies from Western Siberia, and the Arabian and Mediterranean Sea. Dissertation Universität Bonn, 152 pp.
Trubin, I.
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Benthic foraminifera from shallow-water of Line Islands. International Symposium on Foraminifera (FORAMS 2023) (26-30 June 2023, Perugia, Italy). 2023. P. 258.
Trubin Y.S. & Langer M.R.
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Bioerosion Structures on Benthic Foraminiferal Tests from the Upper Cretaceous and Paleogene of Western Siberia. Paleontological Journal, 57(10), 1212-1223.
Trubin, Ya. S.; Marinov, V. A.; Kosenko, I. N.; Smirnov, P. V. & Novoselov, A. A.
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Distribution patterns of living benthic foraminifera in Mahrés Bay (Gulf of Gabes, Tunisia): Linking habitats and faunal components. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 310(1), 13-24.
Kamoun, Mohamed; Trubin, Yaroslav S.; Ben, Khalifa Khawla; Zaïbi, Chahira & Langer, Martin R.
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Early Mesozoic evolution of Madygen (Kyrgyzstan, Central Asia). 94. Jahrestagung der Paläontologischen Gesellschaft (18-22 September 2023, Jena, Germany). 2023. P. 38-39.
Kogan I., Fischer J., Voigt S., Brosig A., Moisan P. & Trubin, Y.S.
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Environmental Signatures Preserved in Extremely Shallow-Water Benthic Foraminiferal Assemblages From Oman, Arabian Sea. Journal of Foraminiferal Research, 53(4), 362–377.
Trubin, Yaroslav S.; Kamoun, Mohamed & Langer, Martin R.
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Foraminiferal assemblages from the Upper Paleocene of the Turgai depression (Northern Kazakhstan). 94. Jahrestagung der Paläontologischen Gesellschaft (18-22 September 2023, Jena, Germany). 2023. P. 80-81.
Trubin Y.S., Marinov V.A., Smirnov P.V. & Langer M.R.
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Large aggutinated foraminifera from the Line Islands (Pacific Ocean): Architecture, preferential mineral selection and geochemical test composition. Abstract Volume Eleventh International Workshop on Agglutinated Foraminifera (19-22 April 2023, Kraków, Poland). 2023. P. 75-76.
Trubin Y.S. & Langer M.R.
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Large trace fossils from the Upper Cretaceous of the Fergana Basin (Kyrgyzstan, Central Asia). 94. Jahrestagung der Paläontologischen Gesellschaft (18-22 September 2023, Jena, Germany). 2023. P. 88-89.
Winkler A., Trubin, Y.S., Brosig A., Kogan I. & Rust J.
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The Foraminifera of the Western Siberian Seas - with what sorts of treasures they filled their homes after life? International Symposium on Foraminifera (FORAMS 2023) (26-30 June 2023, Perugia, Italy). 2023. P. 258-259.
Trubin Y.S., Marinov V.A., Rudmin M.A., Smirnov P.V., Wikler A., Brit V.A., Novoselov A.A. & Langer M.R.
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The lowdiversity benthic foraminiferal assemblages from Late Eocene deposits of Western Siberia. 4th International Congress on Stratigraphy (11-13 July 2023, Lille, France). 2023. P. 76-77.
Trubin Y.S., Marinov V.A., Smirnov P.V., Novoselov A.A. & Langer M.R.
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Diversity, biostratigraphy and paleobiogeographic distribution of Bagginoides, two new species of benthic foraminifera from Upper Cretaceous and Paleocene deposits of Western Siberia. Micropaleontology, 70(5), 531-539.
Trubin, Yaroslav S.; Marinov, Vladimir A.; Smirnov, Pavel V. & Winkler, Alina
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Heterogeneity among juvenile megalospheres in Peneroplis pertusus (Forskål) from the Line Islands (Pacific Ocean): Size range, morphotypes, and test deformations. Journal of Foraminiferal Research, 54(3), 264-270.
Langer, Martin R.; Trubin, Yaroslav; Tian, Skye Yunshu & Goldstein, Susan T.
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Upper Eocene benthic foraminiferal assemblages from Western Siberia (Trans-Ural Region): a multi-proxy approach to infer environmental changes. Micropaleontology, 70(3), 287-299.
Trubin, Yaroslav S.; Marinov, Vladimir A.; Smirnov, Pavel V.; Novoselov, Andrey A. & Langer, Martin R.
