Forest soil respiration and its heterotrophic and autotrophic   components: Global patterns and responses to temperature and   precipitation

doi:10.1016/j.soilbio.2010.04.013

CORC > 北京大学 > 城市与环境学院

	Forest soil respiration and its heterotrophic and autotrophic components: Global patterns and responses to temperature and precipitation
	Wang Wei ; Chen Weile ; Wang Shaopeng
刊名	土壤生物学与土壤生物化学
	2010
关键词	Autotrophic respiration Heterotrophic respiration Mean annual precipitation Mean annual temperature Non-linear responses FINE-ROOT DYNAMICS CO2 EFFLUX TERRESTRIAL ECOSYSTEMS ECOLOGICAL THRESHOLDS HARDWOOD FOREST CLIMATE-CHANGE SPRUCE FOREST WATER-CONTENT CARBON SENSITIVITY
DOI	10.1016/j.soilbio.2010.04.013
英文摘要	Quantifying global patterns of forest soil respiration (SR), its components of heteroteophic respiration (FIR) and belowground autotrophic respiration (AR), and their responses to temperature and precipitation are vital to accurately evaluate responses of the terrestrial carbon balance to future climate change. There is great uncertainty associated with responses of SR to climate change, concerning the differences in climatic controls and apparent Q(10) (the factor by which respiration increases for a 10 degrees C increase in temperature) over HR and AR. Here, we examine available information on SR, HR, AR, the contribution of HR to SR (HR/SR), and Q(10) of SR and its components from a diverse global database of forest ecosystems. The goals were to test how SR and its two components (AR and FIR) respond to temperature and precipitation changes, and to test the differences in apparent Q(10) between AR and HR. SR increased linearly with mean annual temperature (MAT), but responded non-linearly to mean annual precipitation (MAP) in naturally-regenerated forests. For every 1 degrees C increase in MAT, overall emissions from SR increased by 24.6 g C m(-2) yr(-1). When MAP was less than 813 mm, every 100 mm increase in MAP led to a release of 75.3 g C m(-2) yr(-1), but the increase rate declined to 20.3 g C m(-2) yr(-1) when MAP was greater than 813 mm. MAT explained less variation in AR than that in HR. The overall emissions in AR and HR for every 1 degrees C increase in MAT, increased by 12.9 and 16.1 g C m(-2) yr(-1), respectively. The AR emissions for every 100 mm increase in MAP, increased by 44.5 g C m(-2) yr(-1) when MAP less than 1000 mm. However, above the threshold. AR emissions stayed relatively constant. HR increased linearly by 15.0 g C m(-2) yr(-1) with every 100 mm increased in MAR The Q(10) value of SR increased with increasing depth at which soil temperature was measured up to 10 cm and was negatively correlated with HR/SR. Our synthesis suggests AR and HR differ in their responses to temperature and precipitation change. We also emphasized the importance of information on soil temperature measurement depth when applying field estimation of Q(10) values into current terrestrial ecosystem models. Q(10) values derived from field SR measurements including AR, will likely overestimate the temperature response of HR on a future warmer earth. (c) 2010 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000279503400006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Soil Science; SCI(E); EI; 20; ARTICLE; 8; 1236-1244; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/161102]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Wang Wei,Chen Weile,Wang Shaopeng. Forest soil respiration and its heterotrophic and autotrophic components: Global patterns and responses to temperature and precipitation[J]. 土壤生物学与土壤生物化学,2010.
APA	Wang Wei,Chen Weile,&Wang Shaopeng.(2010).Forest soil respiration and its heterotrophic and autotrophic components: Global patterns and responses to temperature and precipitation.土壤生物学与土壤生物化学.
MLA	Wang Wei,et al."Forest soil respiration and its heterotrophic and autotrophic components: Global patterns and responses to temperature and precipitation".土壤生物学与土壤生物化学 (2010).