气候变化领域集成服务门户(CCPortal): The role of environmental factors in the long-term evolution of the marine biological pump

CCPortal

DOI	10.1038/s41561-020-00660-6
	The role of environmental factors in the long-term evolution of the marine biological pump
	Fakhraee M.; Planavsky N.J.; Reinhard C.T.
发表日期	2020
ISSN	17520894
起始页码	812
结束页码	816
卷号	13 期号:12
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.
英文关键词	bacterioplankton; biological pump; carbon dioxide; carbon sequestration; eukaryote; innovation; organic carbon; oxygenation; vertical movement; water column; zooplankton; Eukaryota
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206771
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
推荐引用方式 GB/T 7714	Fakhraee M.,Planavsky N.J.,Reinhard C.T.. The role of environmental factors in the long-term evolution of the marine biological pump[J],2020,13(12).
APA	Fakhraee M.,Planavsky N.J.,&Reinhard C.T..(2020).The role of environmental factors in the long-term evolution of the marine biological pump.Nature Geoscience,13(12).
MLA	Fakhraee M.,et al."The role of environmental factors in the long-term evolution of the marine biological pump".Nature Geoscience 13.12(2020).