DOI: 10.1002/2016GL070438
论文题名: Microbial functional diversity alters the structure and sensitivity of oxygen deficient zones
作者: Penn J. ; Weber T. ; Deutsch C.
刊名: Geophysical Research Letters
ISSN: 0094-8614
EISSN: 1944-8345
出版年: 2016
卷: 43, 期: 18 起始页码: 9773
结束页码: 9780
语种: 英语
英文关键词: climate change
; deoxygenation
; ecological stoichiometry
; microbial ecology
; nitrogen cycle
; oxygen minimum zones
Scopus关键词: Denitrification
; Ecology
; Nitrogen
; Nitrogen removal
; Oxygen
; Reaction intermediates
; Stoichiometry
; Wastewater treatment
; Deoxygenations
; Ecological stoichiometry
; Microbial ecology
; Nitrogen cycles
; Oxygen minimum zone
; Climate change
英文摘要: Oxygen deficient zones (ODZs) below the ocean surface regulate marine productivity by removing bioavailable nitrogen (N). A complex microbial community mediates N loss, but the interplay of its diverse metabolisms is poorly understood. We present an ecosystem model of the North Pacific ODZ that reproduces observed chemical distributions yet predicts different ODZ structure, rates, and climatic sensitivity compared to traditional geochemical models. An emergent lower O2 limit for aerobic nitrification lies below the upper O2 threshold for anaerobic denitrification, creating a zone of microbial coexistence that causes a larger ODZ but slower total rates of N loss. The O2-dependent competition for the intermediate nitrite produces gradients in its oxidation versus reduction, anammox versus heterotrophic denitrification, and the net ecological stoichiometry of N loss. The latter effect implies that an externally driven ODZ expansion should favor communities that more efficiently remove N, increasing the sensitivity of the N cycle to climate change. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987990660&doi=10.1002%2f2016GL070438&partnerID=40&md5=4b7d80db8586ec2cac1d5ac06bd2273f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9577
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Oceanography, University of Washington, Seattle, WA, United States
Recommended Citation:
Penn J.,Weber T.,Deutsch C.. Microbial functional diversity alters the structure and sensitivity of oxygen deficient zones[J]. Geophysical Research Letters,2016-01-01,43(18).