Perspectives on the microbial carbon pump with special reference to microbial respiration and ecosystem efficiency in large estuarine systems

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 海洋生物与碳汇研究中心

	Perspectives on the microbial carbon pump with special reference to microbial respiration and ecosystem efficiency in large estuarine systems
	Dang, H.1,2,3; Jiao, N.1,2,3
刊名	BIOGEOSCIENCES
	2014
卷号	11 期号:14 页码:3887-3898
英文摘要	Although respiration-based oxidation of reduced carbon releases CO into the environment, it provides an ecosystem with the metabolic energy for essential biogeochemical processes, including the newly proposed microbial carbon pump (MCP). The efficiency of MCP in heterotrophic microorganisms is related to the mechanisms of energy transduction employed and hence is related to the form of respiration utilized. Anaerobic organisms typically have lower efficiencies of energy transduction and hence lower efficiencies of energy-dependent carbon transformation. This leads to a lower MCP efficiency on a per-cell basis. Substantial input of terrigenous nutrients and organic matter into estuarine ecosystems typically results in elevated heterotrophic respiration that rapidly consumes dissolved oxygen, potentially producing hypoxic and anoxic zones in the water column. The lowered availability of dissolved oxygen and the excessive supply of nutrients such as nitrate from river discharge lead to enhanced anaerobic respiration processes such as denitrification and dissimilatory nitrate reduction to ammonium. Thus, some nutrients may be consumed through anaerobic heterotrophs, instead of being utilized by phytoplankton for autotrophic carbon fixation. In this manner, eutrophied estuarine ecosystems become largely fueled by anaerobic respiratory pathways and their efficiency is less due to lowered ecosystem productivity when compared to healthy and balanced estuarine ecosystems. This situation may have a negative impact on the ecological function and efficiency of the MCP which depends on the supply of both organic carbon and metabolic energy. This review presents our current understanding of the MCP mechanisms from the view point of ecosystem energy transduction efficiency, which has not been discussed in previous literature.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Ecology ; Geosciences, Multidisciplinary
研究领域[WOS]	Environmental Sciences & Ecology ; Geology
关键词[WOS]	DISSOLVED ORGANIC-MATTER ; OXYGEN MINIMUM ZONES ; HARMFUL ALGAL BLOOMS ; VI SECRETION ; OPEN-OCEAN ; MARINE PROTEOBACTERIA ; NITROGEN-CYCLE ; COMPARATIVE GENOMICS ; DEPENDENT TRANSPORT ; AQUATIC ECOSYSTEMS
收录类别	SCI
语种	英语
WOS记录号	WOS:000339895600012
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/6278]
专题	青岛生物能源与过程研究所_海洋生物与碳汇研究中心
作者单位	1.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China 2.Xiamen Univ, Inst Marine Microbes & Ecospheres, Joint Res Ctr Carbon Sink, Qingdao 266101, Peoples R China 3.Chinese Acad Sci, Qingdao Inst BioEnergy & Bioproc Technol, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Dang, H.,Jiao, N.. Perspectives on the microbial carbon pump with special reference to microbial respiration and ecosystem efficiency in large estuarine systems[J]. BIOGEOSCIENCES,2014,11(14):3887-3898.
APA	Dang, H.,&Jiao, N..(2014).Perspectives on the microbial carbon pump with special reference to microbial respiration and ecosystem efficiency in large estuarine systems.BIOGEOSCIENCES,11(14),3887-3898.
MLA	Dang, H.,et al."Perspectives on the microbial carbon pump with special reference to microbial respiration and ecosystem efficiency in large estuarine systems".BIOGEOSCIENCES 11.14(2014):3887-3898.