DOI: 10.1007/s10533-017-0326-9
Scopus记录号: 2-s2.0-85016412665
论文题名: Oxygen dynamics in shelf seas sediments incorporating seasonal variability
作者: Hicks N. ; Ubbara G.R. ; Silburn B. ; Smith H.E.K. ; Kröger S. ; Parker E.R. ; Sivyer D. ; Kitidis V. ; Hatton A. ; Mayor D.J. ; Stahl H.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 135, 期: 2018-01-02 起始页码: 35
结束页码: 47
语种: 英语
英文关键词: Benthic biogeochemistry
; Benthic carbon cycling
; Benthic mineralisation
; Oxygen consumption
; Shelf sea
; Total oxygen uptake
Scopus关键词: benthic environment
; biogeochemical cycle
; biogeochemistry
; biomineralization
; carbon cycle
; cohesive sediment
; oxygen consumption
; phytoplankton
; seasonal variation
; seasonality
; sediment analysis
; shelf sea
; shelf sediment
; Atlantic Ocean
; Celtic Sea
英文摘要: Shelf sediments play a vital role in global biogeochemical cycling and are particularly important areas of oxygen consumption and carbon mineralisation. Total benthic oxygen uptake, the sum of diffusive and faunal mediated uptake, is a robust proxy to quantify carbon mineralisation. However, oxygen uptake rates are dynamic, due to the diagenetic processes within the sediment, and can be spatially and temporally variable. Four benthic sites in the Celtic Sea, encompassing gradients of cohesive to permeable sediments, were sampled over four cruises to capture seasonal and spatial changes in oxygen dynamics. Total oxygen uptake (TOU) rates were measured through a suite of incubation experiments and oxygen microelectrode profiles were taken across all four benthic sites to provide the oxygen penetration depth and diffusive oxygen uptake (DOU) rates. The difference between TOU and DOU allowed for quantification of the fauna mediated oxygen uptake and diffusive uptake. High resolution measurements showed clear seasonal and spatial trends, with higher oxygen uptake rates measured in cohesive sediments compared to the permeable sediment. The significant differences in oxygen dynamics between the sediment types were consistent between seasons, with increasing oxygen consumption during and after the phytoplankton bloom. Carbon mineralisation in shelf sediments is strongly influenced by sediment type and seasonality. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83231
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, United Kingdom; Centre for Environment, Fisheries and Aquaculture Science, Lowestoft, United Kingdom; Ocean Biogeochemistry and Ecosystems, National Oceanography Centre, Southampton, United Kingdom; Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, United Kingdom; College of Sustainability Sciences and Humanities, Zayed University, Dubai, United Arab Emirates; Department of Chemistry, University of Glasgow, University Avenue, Joseph Black Building, Glasgow, United Kingdom
Recommended Citation:
Hicks N.,Ubbara G.R.,Silburn B.,et al. Oxygen dynamics in shelf seas sediments incorporating seasonal variability[J]. Biogeochemistry,2017-01-01,135(2018-01-02)