DOI: 10.1038/ngeo2782
论文题名: Biomass turnover time in terrestrial ecosystems halved by land use
作者: Erb K.-H. ; Fetzel T. ; Plutzar C. ; Kastner T. ; Lauk C. ; Mayer A. ; Niedertscheider M. ; Körner C. ; Haberl H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期: 9 起始页码: 674
结束页码: 678
语种: 英语
Scopus关键词: biomass
; carbon cycle
; carbon sequestration
; global change
; land use change
; net primary production
; terrestrial ecosystem
; trade-off
英文摘要: The terrestrial carbon cycle is not well quantified. Biomass turnover time is a crucial parameter in the global carbon cycle, and contributes to the feedback between the terrestrial carbon cycle and climate. Biomass turnover time varies substantially in time and space, but its determinants are not well known, making predictions of future global carbon cycle dynamics uncertain. Land use-the sum of activities that aim at enhancing terrestrial ecosystem services-alters plant growth and reduces biomass stocks, and is hence expected to affect biomass turnover. Here we explore land-use-induced alterations of biomass turnover at the global scale by comparing the biomass turnover of the actual vegetation with that of a hypothetical vegetation state with no land use under current climate conditions. We find that, in the global average, biomass turnover is 1.9 times faster with land use. This acceleration affects all biomes roughly equally, but with large differences between land-use types. Land conversion, for example from forests to agricultural fields, is responsible for 59% of the acceleration; the use of forests and natural grazing land accounts for 26% and 15% respectively. Reductions in biomass stocks are partly compensated by reductions in net primary productivity. We conclude that land use significantly and systematically affects the fundamental trade-off between carbon turnover and carbon stocks. © 2016 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/105924
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: Institute of Social Ecology Vienna, Alpen-Adria Universitaet Klagenfurt, Vienna-Graz, Schottenfeldgasse 29, Vienna, Austria; Division of Conservation Biology, Vegetation Ecology and Landscape Ecology, University of Vienna, Rennweg 14, Vienna, Austria
Recommended Citation:
Erb K.-H.,Fetzel T.,Plutzar C.,et al. Biomass turnover time in terrestrial ecosystems halved by land use[J]. Nature Geoscience,2016-01-01,9(9)