气候变化领域集成服务门户(CCPortal): Group 2i Isochrysidales produce characteristic alkenones reflecting sea ice distribution

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DOI	10.1038/s41467-020-20187-z
	Group 2i Isochrysidales produce characteristic alkenones reflecting sea ice distribution
	Wang K.J.; Huang Y.; Majaneva M.; Belt S.T.; Liao S.; Novak J.; Kartzinel T.R.; Herbert T.D.; Richter N.; Cabedo-Sanz P.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Alkenones are biomarkers produced solely by algae in the order Isochrysidales that have been used to reconstruct sea surface temperature (SST) since the 1980s. However, alkenone-based SST reconstructions in the northern high latitude oceans show significant bias towards warmer temperatures in core-tops, diverge from other SST proxies in down core records, and are often accompanied by anomalously high relative abundance of the C37 tetra-unsaturated methyl alkenone (%C37:4). Elevated %C37:4 is widely interpreted as an indicator of low sea surface salinity from polar water masses, but its biological source has thus far remained elusive. Here we identify a lineage of Isochrysidales that is responsible for elevated C37:4 methyl alkenone in the northern high latitude oceans through next-generation sequencing and lab-culture experiments. This Isochrysidales lineage co-occurs widely with sea ice in marine environments and is distinct from other known marine alkenone-producers, namely Emiliania huxleyi and Gephyrocapsa oceanica. More importantly, the %C37:4 in seawater filtered particulate organic matter and surface sediments is significantly correlated with annual mean sea ice concentrations. In sediment cores from the Svalbard region, the %C37:4 concentration aligns with the Greenland temperature record and other qualitative regional sea ice records spanning the past 14 kyrs, reflecting sea ice concentrations quantitatively. Our findings imply that %C37:4 is a powerful proxy for reconstructing sea ice conditions in the high latitude oceans on thousand- and, potentially, on million-year timescales. © 2021, The Author(s).
语种	英语
scopus关键词	alkenone; ketone derivative; particulate organic matter; sea water; unclassified drug; alkenone; biomarker; coccolith; particulate organic matter; proxy climate record; sea ice; sea surface temperature; water mass; Article; concentration (parameter); Emiliania huxleyi; Gephyrocapsa oceanica; Greenland; high throughput sequencing; Iisochrysidales; latitude; marine environment; marine species; nonhuman; salinity; sea ice; sediment; surface property; Svalbard and Jan Mayen; temperature; Arctic; Greenland; Svalbard; Svalbard and Jan Mayen; Emiliania huxleyi; Gephyrocapsa oceanica; Indicator indicator; Isochrysidales
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/251542
作者单位	Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, United States; Institute at Brown for Environment and Society, Brown University, Providence, RI 02912, United States; Norwegian Institute for Nature Research (NINA), Trondheim, NO-7485, Norway; Biogeochemistry Research Centre, School of Geography, Earth and Environmental Sciences, Plymouth University, Plymouth, PL4 8AA, United Kingdom; Department of Chemistry, Brown University, Providence, RI 02912, United States; Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, United States; Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, Texel, Netherlands
推荐引用方式 GB/T 7714	Wang K.J.,Huang Y.,Majaneva M.,et al. Group 2i Isochrysidales produce characteristic alkenones reflecting sea ice distribution[J],2021,12(1).
APA	Wang K.J..,Huang Y..,Majaneva M..,Belt S.T..,Liao S..,...&Cabedo-Sanz P..(2021).Group 2i Isochrysidales produce characteristic alkenones reflecting sea ice distribution.Nature Communications,12(1).
MLA	Wang K.J.,et al."Group 2i Isochrysidales produce characteristic alkenones reflecting sea ice distribution".Nature Communications 12.1(2021).