A Late Pleistocene coastal ecosystem in French Guiana was hyperdiverse relative to today

• 成果类型: Article
• 署名作者: Antoine, Pierre Olivier; Wieringa, Linde N.; Adnet, Sylvain; Aguilera, Orangel; Bodin, Stephanie C.; Cairns, Stephen; Conejeros-Vargase, Carlos A.; Cornee, Jean-Jacques; Ezerinskis, Zilvinas; Fietzke, Jan; Gribenski, Natacha O.; Grouard, Sandrine; Hendy, Austin; Hoorn, Carina; Joannes-Boyau, Renaud; Langer, Martin R.; Luque, Javier; Marivaux, Laurent; Moissette, Pierre; Nooren, Kees; Quillevere, Frederic; Sapolaite, Justina; Sciumbata, Matteo; Valla, Pierre G.; Witteveen, Nina H.; Casanova, Alexandre; Clavier, Simon; Bidgrain, Philibert; Gallay, Marjorie; Rhone, Mathieu; Heuret, Arnauld
• 署名单位: Centre National de la Recherche Scientifique (CNRS); Institut de Recherche pour le Developpement (IRD); Universite de Montpellier; Universidade Federal Fluminense; Leibniz Association; Senckenberg Gesellschaft fur Naturforschung (SGN); Smithsonian Institution; Smithsonian National Museum of Natural History; Universidad Nacional Autonoma de Mexico; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Earth Sciences & Astronomy (INSU); Universite de Montpellier; Center for Physical Sciences & Technology - Lithuania; Helmholtz Association; GEOMAR Helmholtz Center for Ocean Research Kiel; University of Bern; Museum National d'Histoire Naturelle (MNHN); Centre National de la Recherche Scientifique (CNRS); University of Amsterdam; Southern Cross University; University of Johannesburg; University of Bonn; University of Cambridge; National & Kapodistrian University of Athens; Ecole Normale Superieure de Lyon (ENS de LYON); Centre National de la Recherche Scientifique (CNRS); Universite Claude Bernard Lyon 1; Vrije Universiteit Amsterdam; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Institut de Recherche pour le Developpement (IRD); Universite Gustave-Eiffel; Universite Savoie Mont Blanc; CIRAD
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-10700
• DOI: 10.1073/pnas.2311597121
• 发表日期: 2024-04-02
• 关键词: sea-level; atlantic; diversity

摘要

Warmer temperatures and higher sea level than today characterized the Last Interglacial interval [Pleistocene, 128 to 116 thousand years ago (ka)]. This period is a remarkable deep-time analog for temperature and sea-level conditions as projected for 2100 AD, yet there has been no evidence of fossil assemblages in the equatorial Atlantic. Here, we report foraminifer, metazoan (mollusks, bony fish, bryozoans, decapods, and sharks among others), and plant communities of coastal tropical marine and mangrove affinities, dating precisely from a ca. 130 to 115 ka time interval near the Equator, at Kourou, in French Guiana. These communities include ca. 230 recent species, some being endangered today and/or first recorded as fossils. The hyperdiverse Kourou mollusk assemblage suggests stronger affinities between Guianese and Caribbean coastal waters by the Last Interglacial than today, questioning the structuring role of the Amazon Plume on tropical Western Atlantic communities at the time. Grassland- dominated pollen, phytoliths, and charcoals from younger deposits in the same sections attest to a marine retreat and dryer conditions during the onset of the last glacial (ca. 110 to 50 ka), with a savanna- dominated landscape and episodes of fire. Charcoals from the last millennia suggest human presence in a mosaic of modern-like continental habitats. Our results provide key information about the ecology and biogeography of pristine Pleistocene tropical coastal ecosystems, especially relevant regarding the-widely anthropogenic- ongoing global warming. Significance The Last Interglacial interval (128 to 116 ka) is a remarkable deep- time analog for temperature and sea- level conditions as projected for 2100, that had not been documented in the equatorial Atlantic thus far. Here, we report hyperdiverse fossil communities of coastal marine and mangrove affinities, dating back from this interval and unearthed at the Europe's Spaceport in Kourou, French Guiana. Mollusk assemblages suggest stronger ecological affinities between Guianas and the Caribbean than today. Grassland- dominated pollen, phytoliths, and charcoals from younger deposits in the same sections attest to a marine retreat and dryer conditions during the Last Glacial Period (100 to 50 ka). These records provide key ecological and biogeographic information about Late Pleistocene tropical coastal ecosystems prior to human influence.