DOI: 10.1111/gcb.13862
Scopus记录号: 2-s2.0-85031492077
论文题名: Global-scale impacts of nitrogen deposition on tree carbon sequestration in tropical, temperate, and boreal forests: A meta-analysis
作者: Schulte-Uebbing L. ; de Vries W.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 2 起始页码: e416
结束页码: e431
语种: 英语
英文关键词: C–N response
; fertilization experiments
; forest carbon sink
; meta-analysis
; nitrogen deposition
; woody biomass
Scopus关键词: aboveground biomass
; belowground biomass
; boreal forest
; carbon sequestration
; carbon sink
; meta-analysis
; nitrogen
; temperate forest
; terrestrial ecosystem
; tropical forest
英文摘要: Elevated nitrogen (N) deposition may increase net primary productivity in N-limited terrestrial ecosystems and thus enhance the terrestrial carbon (C) sink. To assess the magnitude of this N-induced C sink, we performed a meta-analysis on data from forest fertilization experiments to estimate N-induced C sequestration in aboveground tree woody biomass, a stable C pool with long turnover times. Our results show that boreal and temperate forests responded strongly to N addition and sequestered on average an additional 14 and 13 kg C per kg N in aboveground woody biomass, respectively. Tropical forests, however, did not respond significantly to N addition. The common hypothesis that tropical forests do not respond to N because they are phosphorus-limited could not be confirmed, as we found no significant response to phosphorus addition in tropical forests. Across climate zones, we found that young forests responded more strongly to N addition, which is important as many previous meta-analyses of N addition experiments rely heavily on data from experiments on seedlings and young trees. Furthermore, the C–N response (defined as additional mass unit of C sequestered per additional mass unit of N addition) was affected by forest productivity, experimental N addition rate, and rate of ambient N deposition. The estimated C–N responses from our meta-analysis were generally lower that those derived with stoichiometric scaling, dynamic global vegetation models, and forest growth inventories along N deposition gradients. We estimated N-induced global C sequestration in tree aboveground woody biomass by multiplying the C–N responses obtained from the meta-analysis with N deposition estimates per biome. We thus derived an N-induced global C sink of about 177 (112–243) Tg C/year in aboveground and belowground woody biomass, which would account for about 12% of the forest biomass C sink (1,400 Tg C/year). © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110558
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Environmental Systems Analysis Group, Wageningen University and Research, Wageningen, Netherlands; Environmental Research (Alterra), Wageningen University and Research, Wageningen, Netherlands
Recommended Citation:
Schulte-Uebbing L.,de Vries W.. Global-scale impacts of nitrogen deposition on tree carbon sequestration in tropical, temperate, and boreal forests: A meta-analysis[J]. Global Change Biology,2018-01-01,24(2)