DOI: 10.1007/s10533-014-9997-7
Scopus记录号: 2-s2.0-84904812926
论文题名: Soil geochemistry confines microbial abundances across an arctic landscape; implications for net carbon exchange with the atmosphere
作者: Gray N.D. ; McCann C.M. ; Christgen B. ; Ahammad S.Z. ; Roberts J.A. ; Graham D.W.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 120, 期: 2018-01-03 起始页码: 307
结束页码: 317
语种: 英语
英文关键词: Biogeochemistry
; Climate science
; Ecology
; Methanotrophs
; Mineralogy
Scopus关键词: Bacteria (microorganisms)
英文摘要: A large portion of the World's terrestrial organic carbon is stored in Arctic permafrost soils. However, due to permafrost warming and increased in situ microbial mineralisation of released carbon, greenhouse gas releases from Arctic soils are increasing, including methane (CH4(g)). To identify environmental controls on such releases, we characterised soil geochemistry and microbial community conditions in 13 near-surface Arctic soils collected across Kongsfjorden, Svalbard. Statistically significant correlations were found between proxies for carbonate mineral content (i.e. Ca and Mg) and soil pH (Spearman rho = 0.87, p < 0.001). In turn, pH significantly inversely correlated with bacterial and Type I methanotroph gene abundances across the soils (r = -0.71, p = 0.01 and r = -0.74, p = 0.006, respectively), which also co-varied with soil phosphorous (P) level (r = 0.79, p = 0.01 and r = 0.63, p = 0.02, respectively). These results suggest that soil P supply, which is controlled by pH and other factors, significantly influences in situ microbial abundances in these Arctic soils. Overall, we conclude microbial responses to increasing 'old carbon' releases in this Arctic region are constrained by nutrient-deficiency in surface soils, with consequential impacts on the flux and composition of carbon gasses released to the atmosphere. © 2014 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83664
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom; Department of Geology, University of Kansas, Lawrence, KS, 66045, United States; Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
Recommended Citation:
Gray N.D.,McCann C.M.,Christgen B.,et al. Soil geochemistry confines microbial abundances across an arctic landscape; implications for net carbon exchange with the atmosphere[J]. Biogeochemistry,2014-01-01,120(2018-01-03)