Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes

	Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes
	Cornelissen, Johannes H. C.; van Bodegom, Peter M.; Aerts, Rien ; Callaghan, Terry V.; van Logtestijn, Richard S. P.; Alatalo, Juha ; Chapin, F. Stuart ; Gerdol, Renato ; Gudmundsson, Jon ; Gwynn-Jones, Dylan
刊名	ecology letters
	2007-07-01
卷号	10 期号:7 页码:619-627
关键词	alpine carbon circum-arctic global change growth form litter turnover mass loss vegetation change
合作状况	其它
中文摘要	whether climate change will turn cold biomes from large long-term carbon sinks into sources is hotly debated because of the great potential for ecosystem-mediated feedbacks to global climate. critical are the direction, magnitude and generality of climate responses of plant litter decomposition. here, we present the first quantitative analysis of the major climate-change-related drivers of litter decomposition rates in cold northern biomes worldwide. leaf litters collected from the predominant species in 33 global change manipulation experiments in circum-arctic-alpine ecosystems were incubated simultaneously in two contrasting arctic life zones. we demonstrate that longer-term, large-scale changes to leaf litter decomposition will be driven primarily by both direct warming effects and concomitant shifts in plant growth form composition, with a much smaller role for changes in litter quality within species. specifically, the ongoing warming-induced expansion of shrubs with recalcitrant leaf litter across cold biomes would constitute a negative feedback to global warming. depending on the strength of other (previously reported) positive feedbacks of shrub expansion on soil carbon turnover, this may partly counteract direct warming enhancement of litter decomposition.
英文摘要	whether climate change will turn cold biomes from large long-term carbon sinks into sources is hotly debated because of the great potential for ecosystem-mediated feedbacks to global climate. critical are the direction, magnitude and generality of climate responses of plant litter decomposition. here, we present the first quantitative analysis of the major climate-change-related drivers of litter decomposition rates in cold northern biomes worldwide. leaf litters collected from the predominant species in 33 global change manipulation experiments in circum-arctic-alpine ecosystems were incubated simultaneously in two contrasting arctic life zones. we demonstrate that longer-term, large-scale changes to leaf litter decomposition will be driven primarily by both direct warming effects and concomitant shifts in plant growth form composition, with a much smaller role for changes in litter quality within species. specifically, the ongoing warming-induced expansion of shrubs with recalcitrant leaf litter across cold biomes would constitute a negative feedback to global warming. depending on the strength of other (previously reported) positive feedbacks of shrub expansion on soil carbon turnover, this may partly counteract direct warming enhancement of litter decomposition.
学科主题	生物科学
WOS标题词	science & technology ; life sciences & biomedicine
类目[WOS]	ecology
研究领域[WOS]	environmental sciences & ecology
关键词[WOS]	arctic tundra ; plant community ; soil respiration ; carbon storage ; ecosystem ; term ; co2 ; sensitivity ; quality ; alaska
收录类别	SCI
语种	英语
WOS记录号	WOS:000247123900008
公开日期	2009-12-07
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1275]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
作者单位	1.Vrije Univ Amsterdam, Dept Syst Ecol, Fac Earth & Life Sci, Inst Ecol Sci, NL-1081 HV Amsterdam, Netherlands 2.Royal Swedish Acad Sci, Abisko Res Stn, S-98107 Abisko, Sweden 3.Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England 4.Swedish Govt Agcy Innovat Syst, VINNOVA, SE-10158 Stockholm, Sweden 5.Univ Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK 99775 USA 6.Univ Ferrara, Dipartimento Risorse Nat & Culturali, I-44100 Ferrara, Italy 7.Agr Univ Iceland, IS-112 Reykjavik, Iceland 8.Univ Wales, Inst Biol Sci, Aberystwyth SY23 3DA, Dyfed, Wales 9.Florida Int Univ, Dept Environm Studies, Miami, FL 33199 USA 10.Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada
推荐引用方式 GB/T 7714	Cornelissen, Johannes H. C.,van Bodegom, Peter M.,Aerts, Rien,et al. Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes[J]. ecology letters,2007,10(7):619-627.
APA	Cornelissen, Johannes H. C..,van Bodegom, Peter M..,Aerts, Rien.,Callaghan, Terry V..,van Logtestijn, Richard S. P..,...&M O L Team.(2007).Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes.ecology letters,10(7),619-627.
MLA	Cornelissen, Johannes H. C.,et al."Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes".ecology letters 10.7(2007):619-627.