DOI: 10.1002/2016GL067719
论文题名: Metabolism of mineral-sorbed organic matter and microbial lifestyles in fluvial ecosystems
作者: Hunter W.R. ; Niederdorfer R. ; Gernand A. ; Veuger B. ; Prommer J. ; Mooshammer M. ; Wanek W. ; Battin T.J.
刊名: Geophysical Research Letters
ISSN: 0094-9360
EISSN: 1944-9091
出版年: 2016
卷: 43, 期: 4 起始页码: 1582
结束页码: 1588
语种: 英语
英文关键词: amino acid
; biofilm
; carbon
; nitrogen
; organomineral
; suspended aggregate
Scopus关键词: Amino acids
; Biofilms
; Biogeochemistry
; Carbon
; Ecology
; Ecosystems
; Efficiency
; Metabolism
; Mineralogy
; Minerals
; Nitrogen
; Physiology
; Biogeochemical
; C and N mineralization
; Microbial lifestyles
; Microbial metabolism
; Mineral surfaces
; Organic molecules
; Organo-mineral particles
; Organominerals
; Aggregates
; amino acid
; biofilm
; complexation
; fluvial landform
; metabolism
; microbial community
; mineral
; mineralization
; nutrient cycling
; organic matter
; stable isotope
; suspended sediment
英文摘要: In fluvial ecosystems mineral erosion, carbon (C), and nitrogen (N) fluxes are linked via organomineral complexation, where dissolved organic molecules bind to mineral surfaces. Biofilms and suspended aggregates represent major aquatic microbial lifestyles whose relative importance changes predictably through fluvial networks. We tested how organomineral sorption affects aquatic microbial metabolism, using organomineral particles containing a mix of 13C, 15N-labeled amino acids. We traced 13C and 15N retention within biofilm and suspended aggregate biomass and its mineralization. Organomineral complexation restricted C and N retention within biofilms and aggregates and also their mineralization. This reduced the efficiency with which biofilms mineralize C and N by 30% and 6%. By contrast, organominerals reduced the C and N mineralization efficiency of suspended aggregates by 41% and 93%. Our findings show how organomineral complexation affects microbial C:N stoichiometry, potentially altering the biogeochemical fate of C and N within fluvial ecosystems. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84975743609&doi=10.1002%2f2016GL067719&partnerID=40&md5=3c5691007ace41924933f35713a30293
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10323
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: Queen's University Marine Laboratory, School of Biological Sciences, Queen's University of Belfast, Portaferry, United Kingdom
Recommended Citation:
Hunter W.R.,Niederdorfer R.,Gernand A.,et al. Metabolism of mineral-sorbed organic matter and microbial lifestyles in fluvial ecosystems[J]. Geophysical Research Letters,2016-01-01,43(4).