DOI: 10.1111/gcb.12322
论文题名: Leaf and fine root carbon stocks and turnover are coupled across Arctic ecosystems
作者: Sloan V.L. ; Fletcher B.J. ; Press M.C. ; Williams M. ; Phoenix G.K.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 12 起始页码: 3668
结束页码: 3676
语种: 英语
英文关键词: Arctic
; Biomass
; Carbon stocks
; Fine root
; Leaf area index
; Root:leaf ratio
; Turnover
Scopus关键词: aboveground biomass
; climate change
; ecosystem response
; fine root
; leaf area index
; plant community
; root
; satellite data
; soil carbon
; vegetation
; Arctic
; Agave americana
; carbon
; agriculture
; Arctic
; article
; biomass
; carbon stocks
; climate change
; environment
; fine root
; Finland
; leaf area
; metabolism
; plant leaf
; plant root
; root:leaf ratio
; Sweden
; theoretical model
; turnover time
; Arctic
; biomass
; carbon stocks
; fine root
; leaf area index
; root:leaf ratio
; turnover
; Agriculture
; Arctic Regions
; Biomass
; Carbon
; Climate Change
; Environment
; Finland
; Models, Theoretical
; Plant Leaves
; Plant Roots
; Sweden
英文摘要: Estimates of vegetation carbon pools and their turnover rates are central to understanding and modelling ecosystem responses to climate change and their feedbacks to climate. In the Arctic, a region containing globally important stores of soil carbon, and where the most rapid climate change is expected over the coming century, plant communities have on average sixfold more biomass below ground than above ground, but knowledge of the root carbon pool sizes and turnover rates is limited. Here, we show that across eight plant communities, there is a significant positive relationship between leaf and fine root turnover rates (r2 = 0.68, P < 0.05), and that the turnover rates of both leaf (r2 = 0.63, P < 0.05) and fine root (r2 = 0.55, P < 0.05) pools are strongly correlated with leaf area index (LAI, leaf area per unit ground area). This coupling of root and leaf dynamics supports the theory of a whole-plant economics spectrum. We also show that the size of the fine root carbon pool initially increases linearly with increasing LAI, and then levels off at LAI = 1 m2 m-2, suggesting a functional balance between investment in leaves and fine roots at the whole community scale. These ecological relationships not only demonstrate close links between above and below-ground plant carbon dynamics but also allow plant carbon pool sizes and their turnover rates to be predicted from the single readily quantifiable (and remotely sensed) parameter of LAI, including the possibility of estimating root data from satellites. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62259
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, United Kingdom; College of Life and Environmental Sciences, Edgbaston, Birmingham B15 2TT, United Kingdom; School of Geosciences, University of Edinburgh, Crew Building, Kings Buildings, Edinburgh EH9 3JN, United Kingdom; Environmental Sciences Division, Oak Ridge National Laboratory, One Bethel Valley Road, Bldg. 2040, Oak Ridge, TN 37831, MS 6301, United States
Recommended Citation:
Sloan V.L.,Fletcher B.J.,Press M.C.,et al. Leaf and fine root carbon stocks and turnover are coupled across Arctic ecosystems[J]. Global Change Biology,2013-01-01,19(12)