气候变化领域集成服务门户(CCPortal): Fast and pervasive diagenetic isotope exchange in foraminifera tests is species-dependent

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DOI	10.1038/s41467-021-27782-8
	Fast and pervasive diagenetic isotope exchange in foraminifera tests is species-dependent
	Cisneros-Lazaro D.; Adams A.; Guo J.; Bernard S.; Baumgartner L.P.; Daval D.; Baronnet A.; Grauby O.; Vennemann T.; Stolarski J.; Escrig S.; Meibom A.
发表日期	2022
ISSN	2041-1723
卷号	13 期号:1
英文摘要	Oxygen isotope compositions of fossil foraminifera tests are commonly used proxies for ocean paleotemperatures, with reconstructions spanning the last 112 million years. However, the isotopic composition of these calcitic tests can be substantially altered during diagenesis without discernible textural changes. Here, we investigate fluid-mediated isotopic exchange in pristine tests of three modern benthic foraminifera species (Ammonia sp., Haynesina germanica, and Amphistegina lessonii) following immersion into an 18O-enriched artificial seawater at 90 °C for hours to days. Reacted tests remain texturally pristine but their bulk oxygen isotope compositions reveal rapid and species-dependent isotopic exchange with the water. NanoSIMS imaging reveals the 3-dimensional intra-test distributions of 18O-enrichment that correlates with test ultra-structure and associated organic matter. Image analysis is used to quantify species level differences in test ultrastructure, which explains the observed species-dependent rates of isotopic exchange. Consequently, even tests considered texturally pristine for paleo-climatic reconstruction purposes may have experienced substantial isotopic exchange; critical paleo-temperature record re-examination is warranted. © 2022, The Author(s).
语种	英语
scopus关键词	benthic foraminifera; diagenesis; foraminifera; fossil record; isotopic analysis; oxygen isotope; paleotemperature; proxy climate record; reconstruction; testing method; calcium carbonate; oxygen; sea water; chemical analysis; chemistry; foraminifer; heat; human; sediment; species difference; ultrastructure; Calcium Carbonate; Chemistry Techniques, Analytical; Foraminifera; Geologic Sediments; Hot Temperature; Humans; Oxygen Isotopes; Seawater; Species Specificity
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251258
作者单位	Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland; Museum National d’Histoire Naturelle, Sorbonne Université, CNRS UMR 7590, IMPMC, Paris, 75005, France; Center for Advanced Surface Analysis, Institute of Earth Science, University of Lausanne, Lausanne, CH-1015, Switzerland; ISTerre, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, Grenoble, 38058, France; CNRS, CINaM, Aix-Marseille Université, Marseille, 13009, France; Institute of Earth Surface Dynamics, University of Lausanne, Lausanne, CH-1015, Switzerland; Institute of Paleobiology, Polish Academy of Sciences, Warsaw, PL-00-818, Poland
推荐引用方式 GB/T 7714	Cisneros-Lazaro D.,Adams A.,Guo J.,et al. Fast and pervasive diagenetic isotope exchange in foraminifera tests is species-dependent[J],2022,13(1).
APA	Cisneros-Lazaro D..,Adams A..,Guo J..,Bernard S..,Baumgartner L.P..,...&Meibom A..(2022).Fast and pervasive diagenetic isotope exchange in foraminifera tests is species-dependent.Nature Communications,13(1).
MLA	Cisneros-Lazaro D.,et al."Fast and pervasive diagenetic isotope exchange in foraminifera tests is species-dependent".Nature Communications 13.1(2022).