气候变化领域集成服务门户(CCPortal): Upregulation of phytoplankton carbon concentrating mechanisms during low CO 2 glacial periods and implications for the phytoplankton pCO 2 proxy

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DOI	10.1016/j.quascirev.2019.01.012
	Upregulation of phytoplankton carbon concentrating mechanisms during low CO 2 glacial periods and implications for the phytoplankton pCO 2 proxy
	Stoll H.M.; Guitian J.; Hernandez-Almeida I.; Mejia L.M.; Phelps S.; Polissar P.; Rosenthal Y.; Zhang H.; Ziveri P.
发表日期	2019
ISSN	0277-3791
起始页码	1
结束页码	20
卷号	208
英文摘要	Published alkenone ε p records spanning known glacial pCO 2 cycles show considerably less variability than predicted by the diffusive model for cellular carbon acquisition and isotope fractionation. We suggest this pattern is consistent with a systematic cellular enhancement of the carbon supply to photosynthesis via carbon concentrating mechanisms under the case of carbon limitation during low pCO 2 glacial time periods, an effect also manifest under carbon limitation in experimental cultures of coccolithophores as well as diatoms. While the low-amplitude ε p signal over glacial pCO 2 cycles has led some to question the reliability of ε p for reconstructing long-term pCO 2 , the [CO 2 ] aq in the tropical oceans during glacial pCO 2 minima represents the most extreme low CO 2 conditions likely experienced by phytoplankton in the Cenozoic, and the strongest upregulation of carbon concentrating mechanisms. Using a statistical multilinear regression model, we quantitatively parse out the factors (namely light, growth rate, and [CO 2 ] aq ), that contribute to variation in ε p in alkenone-producing algae, which confirms a much smaller dependence of ε p on [CO 2 ] aq in the low [CO 2 ] aq range, than inferred from the hyperbolic form of the diffusive model. Application of the new statistical model to two published tropical ε p records spanning the late Neogene produces much more dynamic pCO 2 estimates than the conventional diffusive model and reveals a significant pCO 2 decline over the last 15 Ma, which is broadly consistent with recent results from boron isotopes of foraminifera. The stable isotopic fractionation between coccolith calcite and seawater dissolved inorganic carbon (here Δ coccolith-DIC ) also shows systematic variations over glacial-interglacial cycles which may, following future experimental constraints, help estimate the degree of upregulation of parts of the algal carbon concentrating mechanism over glacial cycles. © 2019 Elsevier Ltd
语种	英语
scopus关键词	Calcite; Carbon dioxide; Glacial geology; Growth rate; Isotopes; Phytoplankton; Regression analysis; Tropics; Carbon-concentrating mechanism; Dissolved inorganic carbon; Experimental cultures; Glacial-interglacial cycles; Isotope fractionation; Multilinear regression model; Stable isotopic fractionation; Statistical modeling; Carbon; alga; alkenone; carbon; carbon dioxide; Cenozoic; coccolith; diatom; dissolved inorganic carbon; foraminifera; glacial-interglacial cycle; isotopic fractionation; Neogene; photosynthesis; phytoplankton; stable isotope; algae; Bacillariophyta; Foraminifera; Haptophyceae
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/152006
作者单位	Department of Earth Sciences, ETH Zürich, Sonnegstrasse 5, Zürich, 8092, Switzerland; Biology and Paleo Environment, Lamont Doherty Earth Observatory, 61 Route 9W, PalisadesNY 10964, United States; Department of Marine and Coastal Sciences, Rutgers University, 71 Dudley Road, New Brunswick, NJ 08901-8560, United States; Institute of Environmental Science and Technology, Universidad Autonoma de Barcelona, Bellaterra, Spain; Catalan Institution for Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, Barcelona, 08010, Spain
推荐引用方式 GB/T 7714	Stoll H.M.,Guitian J.,Hernandez-Almeida I.,et al. Upregulation of phytoplankton carbon concentrating mechanisms during low CO 2 glacial periods and implications for the phytoplankton pCO 2 proxy[J],2019,208.
APA	Stoll H.M..,Guitian J..,Hernandez-Almeida I..,Mejia L.M..,Phelps S..,...&Ziveri P..(2019).Upregulation of phytoplankton carbon concentrating mechanisms during low CO 2 glacial periods and implications for the phytoplankton pCO 2 proxy.Quaternary Science Reviews,208.
MLA	Stoll H.M.,et al."Upregulation of phytoplankton carbon concentrating mechanisms during low CO 2 glacial periods and implications for the phytoplankton pCO 2 proxy".Quaternary Science Reviews 208(2019).