DOI: 10.1038/ngeo1921
论文题名: Microbial control of the dark end of the biological pump
作者: Herndl G.J. ; Reinthaler T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 9 起始页码: 718
结束页码: 724
语种: 英语
Scopus关键词: biological pump
; carbon dioxide
; community composition
; inorganic carbon
; microbial community
; phytoplankton
; sea surface
; sediment trap
; surface water
英文摘要: A fraction of the carbon captured by phytoplankton in the sunlit surface ocean sinks to depth as dead organic matter and faecal material. The microbial breakdown of this material in the subsurface ocean generates carbon dioxide. Collectively, this microbially mediated flux of carbon from the atmosphere to the ocean interior is termed the biological pump. In recent decades it has become clear that the composition of the phytoplankton community in the surface ocean largely determines the quantity and quality of organic matter that sinks to depth. This settling organic matter, however, is not sufficient to meet the energy demands of microbes in the dark ocean. Two additional sources of organic matter have been identified: non-sinking organic particles of debated origin that escape capture by sediment traps and exhibit stable concentrations throughout the dark ocean, and microbes that convert inorganic carbon into organic matter. Whether these two sources can together account for the significant mismatch between organic matter consumption and supply in the dark ocean remains to be seen. It is clear, however, that the microbial community of the deep ocean works in a fundamentally different way from surface water communities. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106717
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Limnology and Oceanography, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria; Department of Biological Oceanography, Royal Netherlands Institute for Sea Research, 1790 AB Den Burg, Texel, Netherlands
Recommended Citation:
Herndl G.J.,Reinthaler T.. Microbial control of the dark end of the biological pump[J]. Nature Geoscience,2013-01-01,6(9)