DOI: 10.1002/2013GB004634
Scopus记录号: 2-s2.0-84887918071
论文题名: Impact of water mass mixing on the biogeochemistry and microbiology of the Northeast Atlantic Deep Water
作者: Reinthaler T ; , Álvarez Salgado X ; A ; , Álvarez M ; , Van Aken H ; M ; , Herndl G ; J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 4 起始页码: 1151
结束页码: 1162
语种: 英语
英文关键词: dark ocean
; hetertrophic activity
; mineralization
; mixing
; North Atlantic
; prokaryotes
Scopus关键词: Apparent oxygen utilizations
; dark ocean
; Dissolved organic carbon
; Dissolved organic matters
; mineralization
; North Atlantic
; Particulate organic matters
; prokaryotes
; Bioactivity
; Microorganisms
; Mixing
; Nucleic acids
; Nutrients
; Oceanography
; Phosphorus compounds
; Stream flow
; Substrates
; Mineralogy
; biogeochemical cycle
; deep water
; mineralization
; parameterization
; phosphorus
; substrate
; water mass
; Atlantic Ocean
; Atlantic Ocean (Northeast)
; Prokaryota
英文摘要: The extent to which water mass mixing contributes to the biological activity of the dark ocean is essentially unknown. Using a multiparameter water mass analysis, we examined the impact of water mass mixing on the nutrient distribution and microbial activity of the Northeast Atlantic Deep Water (NEADW) along an 8000 km long transect extending from 62°N to 5°S. Mixing of four water types (WT) and basin scale mineralization from the site where the WT where defined to the study area explained up to 95% of the variability in the distribution of inorganic nutrients and apparent oxygen utilization. Mixing-corrected average O2:N:P mineralization ratios of 127(±11):13.0(±0.7):1 in the core of the NEADW suggested preferential utilization of phosphorus compounds while dissolved organic carbon mineralization contributed a maximum of 20% to the oxygen demand of the NEADW. In conjunction with the calculated average mineralization ratios, our results indicate a major contribution of particulate organic matter to the biological activity in the NEADW. The variability in prokaryotic abundance, high nucleic acid containing cells, and prokaryotic heterotrophic production in the NEADW was explained by large scale (64-79%) and local mineralization processes (21-36%), consistent with the idea that deep-water prokaryotic communities are controlled by substrate supply. Overall, our results suggest a major impact of mixing on the distribution of inorganic nutrients and a weaker influence on the dissolved organic matter pool supporting prokaryotic activity in the NEADW. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77556
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Limnology and Oceanography, University of Vienna, Althanstrasse 14, Vienna, AT-1090, Austria; Department of Marine Biology, University of Vienna, Vienna, Austria; Instituto de Investigaciones Marinas (IIM-CSIC), Vigo, Spain; Instituto Español de Oceanografía (IEO), A Coruña, Spain; Department of Physical Oceanography, Royal Netherlands Institute for Sea Research (NIOZ), Den Burg, Netherlands; Department of Biological Oceanography, Royal Netherlands Institute for Sea Research (NIOZ), Den Burg, Netherlands
Recommended Citation:
Reinthaler T,, Álvarez Salgado X,A,et al. Impact of water mass mixing on the biogeochemistry and microbiology of the Northeast Atlantic Deep Water[J]. Global Biogeochemical Cycles,2013-01-01,27(4)