DOI: 10.1038/ngeo2920
论文题名: Microbially driven export of labile organic carbon from the Greenland ice sheet
作者: Musilova M. ; Tranter M. ; Wadham J. ; Telling J. ; Tedstone A. ; Anesio A.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 5 起始页码: 360
结束页码: 365
语种: 英语
Scopus关键词: dissolved organic carbon
; glacier dynamics
; ice sheet
; marine ecosystem
; meltwater
; microbial activity
; microbial community
; primary production
; runoff
; stream
; subglacial environment
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Glaciers and ice sheets are significant sources of dissolved organic carbon and nutrients to downstream subglacial and marine ecosystems. Climatically driven increases in glacial runoff are expected to intensify the impact of exported nutrients on local and regional downstream environments. However, the origin and bioreactivity of dissolved organic carbon from glacier surfaces are not fully understood. Here, we present simultaneous measurements of gross primary production, community respiration, dissolved organic carbon composition and export from different surface habitats of the Greenland ice sheet, throughout the ablation season. We found that microbial production was significantly correlated with the concentration of labile dissolved organic species in glacier surface meltwater. Further, we determined that freely available organic compounds made up 62% of the dissolved organic carbon exported from the glacier surface through streams. We therefore conclude that microbial communities are the primary driver for labile dissolved organic carbon production and recycling on glacier surfaces, and that glacier dissolved organic carbon export is dependent on active microbial processes during the melt season. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105793
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; School of Geoscience, University of Edinburgh, Edinburgh, United Kingdom; Slovak Organisation for Space Activities (SOSA), Bratislava, Slovakia; Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Bratislava, Slovakia
Recommended Citation:
Musilova M.,Tranter M.,Wadham J.,et al. Microbially driven export of labile organic carbon from the Greenland ice sheet[J]. Nature Geoscience,2017-01-01,10(5)