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DOI | 10.1073/pnas.1917001117 |
Laminarin is a major molecule in the marine carbon cycle | |
Becker S.; Tebben J.; Coffinet S.; Wiltshire K.; Iversen M.H.; Harder T.; Hinrichs K.-U.; Hehemann J.-H. | |
发表日期 | 2020 |
ISSN | 0027-8424 |
起始页码 | 6599 |
结束页码 | 6607 |
卷号 | 117期号:12 |
英文摘要 | Marine microalgae sequester as much CO2 into carbohydrates as terrestrial plants. Polymeric carbohydrates (i.e., glycans) provide carbon for heterotrophic organisms and constitute a carbon sink in the global oceans. The quantitative contributions of different algal glycans to cycling and sequestration of carbon remain unknown, partly because of the analytical challenge to quantify glycans in complex biological matrices. Here, we quantified a glycan structural type using a recently developed biocatalytic strategy, which involves laminarinase enzymes that specifically cleave the algal glycan laminarin into readily analyzable fragments. We measured laminarin along transects in the Arctic, Atlantic, and Pacific oceans and during three time series in the North Sea. These data revealed a median of 26 ± 17% laminarin within the particulate organic carbon pool. The observed correlation between chlorophyll and laminarin suggests an annual production of algal laminarin of 12 ± 8 gigatons: that is, approximately three times the annual atmospheric carbon dioxide increase by fossil fuel burning. Moreover, our data revealed that laminarin accounted for up to 50% of organic carbon in sinking diatom-containing particles, thus substantially contributing to carbon export from surface waters. Spatially and temporally variable laminarin concentrations in the sunlit ocean are driven by light availability. Collectively, these observations highlight the prominent ecological role and biogeochemical function of laminarin in oceanic carbon export and energy flow to higher trophic levels. © 2020 National Academy of Sciences. All rights reserved. |
英文关键词 | Carbon cycle; Diatoms; Diel cycle; Glycans; Laminarin |
语种 | 英语 |
scopus关键词 | carbon dioxide; chlorophyll; laminaran; organic carbon; surface water; carbon; carbon dioxide; chlorophyll; glucan; laminaran; sea water; air pollution; algal bloom; Arctic Ocean; Article; Atlantic Ocean; biocatalysis; carbon cycle; carbon fixation; carbon sink; degradation; diatom; food web; fossil fuel burning; light exposure; marine environment; nonhuman; North Sea; Pacific Ocean; phytoplankton; priority journal; time series analysis; trophic level; chemistry; growth, development and aging; metabolism; sea; Carbon; Carbon Cycle; Carbon Dioxide; Chlorophyll; Diatoms; Glucans; Oceans and Seas; Seawater |
来源期刊 | Proceedings of the National Academy of Sciences of the United States of America
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/159028 |
作者单位 | Becker, S., MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany, Max Planck Institute for Marine Microbiology, Bremen, 28359, Germany, Department of Geosciences, University of Bremen, Bremen, 28359, Germany; Tebben, J., Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany; Coffinet, S., MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany, Department of Geosciences, University of Bremen, Bremen, 28359, Germany; Wiltshire, K., Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany; Iversen, M.H., MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany, Department of Geosciences, University of Bremen, Bremen, 28359, Germany; Harder, T., Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany, Faculty of Biology and Chemistry, University of Bremen, Brem... |
推荐引用方式 GB/T 7714 | Becker S.,Tebben J.,Coffinet S.,et al. Laminarin is a major molecule in the marine carbon cycle[J],2020,117(12). |
APA | Becker S..,Tebben J..,Coffinet S..,Wiltshire K..,Iversen M.H..,...&Hehemann J.-H..(2020).Laminarin is a major molecule in the marine carbon cycle.Proceedings of the National Academy of Sciences of the United States of America,117(12). |
MLA | Becker S.,et al."Laminarin is a major molecule in the marine carbon cycle".Proceedings of the National Academy of Sciences of the United States of America 117.12(2020). |
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