气候变化领域集成服务门户(CCPortal): Nutrient availability as the key regulator of global forest carbon balance

CCPortal

DOI	10.1038/NCLIMATE2177
	Nutrient availability as the key regulator of global forest carbon balance
	Fernandez-Martinez, M.; Vicca, S.; Janssens, I. A.; Sardans, J.; Luyssaert, S.; Campioli, M.; Chapin, F. S., III; Ciais, P.; Malhi, Y.; Obersteiner, M.; Papale, D.; Piao, S. L.; Reichstein, M.; Roda, F.; Penuelas, J.
通讯作者	Fernandez-Martinez, M (通讯作者)
发表日期	2014
ISSN	1758-678X
EISSN	1758-6798
起始页码	471
结束页码	476
卷号	4 期号:6
英文摘要	Forests strongly affect climate through the exchange of large amounts of atmospheric CO2 (ref. 1). The main drivers of spatial variability in net ecosystem production (NEP) on a global scale are, however, poorly known. As increasing nutrient availability increases the production of biomass per unit of photosynthesis(2) and reduces heterotrophic(3) respiration in forests, we expected nutrients to determine carbon sequestration in forests. Our synthesis study of 92 forests in different climate zones revealed that nutrient availability indeed plays a crucial role in determining NEP and ecosystem carbon-use efficiency (CUEe; that is, the ratio of NEP to gross primary production (GPP)). Forests with high GPP exhibited high NEP only in nutrient-rich forests (CUEe = 33 +/- 4%; mean +/- s.e.m.). In nutrient-poor forests, a much larger proportion of GPP was released through ecosystem respiration, resulting in lower CUEe (6 +/- 4%). Our finding that nutrient availability exerts a stronger control on NEP than on carbon input (GPP) conflicts with assumptions of nearly all global coupled carbon cycle-climate models, which assume that carbon inputs through photosynthesis drive biomass production and carbon sequestration. An improved global understanding of nutrient availability would therefore greatly improve carbon cycle modelling and should become a critical focus for future research.
关键词	SPATIAL VARIABILITY RESPIRATION EFFICIENCY BOREAL STOCKS
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000337138700023
来源期刊	NATURE CLIMATE CHANGE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258414
推荐引用方式 GB/T 7714	Fernandez-Martinez, M.,Vicca, S.,Janssens, I. A.,et al. Nutrient availability as the key regulator of global forest carbon balance[J]. 中国科学院青藏高原研究所,2014,4(6).
APA	Fernandez-Martinez, M..,Vicca, S..,Janssens, I. A..,Sardans, J..,Luyssaert, S..,...&Penuelas, J..(2014).Nutrient availability as the key regulator of global forest carbon balance.NATURE CLIMATE CHANGE,4(6).
MLA	Fernandez-Martinez, M.,et al."Nutrient availability as the key regulator of global forest carbon balance".NATURE CLIMATE CHANGE 4.6(2014).