DOI: 10.1038/s41561-020-00660-6
论文题名: The role of environmental factors in the long-term evolution of the marine biological pump
作者: Fakhraee M. ; Planavsky N.J. ; Reinhard C.T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期: 12 起始页码: 812
结束页码: 816
语种: 英语
英文关键词: bacterioplankton
; biological pump
; carbon dioxide
; carbon sequestration
; eukaryote
; innovation
; organic carbon
; oxygenation
; vertical movement
; water column
; zooplankton
; Eukaryota
英文摘要: The biological pump—the transfer of atmospheric carbon dioxide to the ocean interior and marine sediments as organic carbon—plays a critical role in regulating the long-term carbon cycle, atmospheric composition and climate. Despite its centrality in the Earth system, the response of the biological pump to biotic innovation and climatic fluctuations through most stages of Earth’s history has been largely conjectural. Here we use a mechanistic model of the biological carbon pump to revisit the factors controlling the transfer efficiency of carbon from surface waters to the ocean interior and marine sediments. We demonstrate that a shift from bacterioplankton-dominated to more eukaryote-rich ecosystems is unlikely to have considerably impacted the efficiency of Earth’s biological pump. In contrast, the evolution of large zooplankton capable of vertical movement in the water column would have enhanced carbon transfer into the ocean interior. However, the impact of zooplankton on the biological carbon pump is still relatively minor when compared with environmental drivers. In particular, increased ocean temperatures and greater atmospheric oxygen abundance lead to notable decreases in global organic carbon transfer efficiency. Taken together, our results call into question causative links between algal diversification and planetary oxygenation and suggest that climate perturbations in Earth’s history have played an important and underappreciated role in driving both carbon sequestration in the ocean interior and Earth surface oxygenation. © 2020, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169590
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth and Planetary Sciences, Yale University, New Haven, CT, United States; School of Earth and Atmospheric Sciences, Georgia Tech, Atlanta, GA, United States; NASA Astrobiology Institute, Alternative Earths Team, Riverside, CA, United States
Recommended Citation:
Fakhraee M.,Planavsky N.J.,Reinhard C.T.. The role of environmental factors in the long-term evolution of the marine biological pump[J]. Nature Geoscience,2020-01-01,13(12)