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	Stoichiometry and large-scale patterns of leaf carbon and nitrogen in the grassland biomes of China
	He, Jin-Sheng ; Fang, Jingyun ; Wang, Zhiheng ; Guo, Dali ; Flynn, Dan F. B. ; Geng, Zhi
	2006
关键词	biogeochemical hypothesis C : N ratio inner Mongolia the Tibetan Plateau Xinjiang N-P STOICHIOMETRY MINERAL-NUTRITION WILD PLANTS TERRESTRIAL WORLDWIDE TEMPERATURE CONVERGENCE STRATEGIES EVOLUTION TRAITS
英文摘要	Nitrogen (N) and carbon-nitrogen (C:N) ratio are key foliar traits with great ecological importance, but their patterns across biomes have only recently been explored. We conducted a systematic census of foliar C, N and C:N ratio for 213 species, from 41 families over 199 research sites across the grassland biomes of China following the same protocol, to explore how different environmental conditions and species composition affect leaf N and C:N stoichiometry. Leaf C:N stoichiometry is stable in three distinct climatic regions in Inner Mongolia, the Tibetan Plateau, and Xinjiang Autonomous Region, despite considerable variations among co-existing species and among different vegetation types. Our results also show that life form and genus identity explain more than 70% of total variations of foliar N and C:N ratio, while mean growing season temperature and growing season precipitation explained only less than 3%. This suggests that, at the biome scale, temperature affects leaf N mainly through a change in plant species composition rather than via temperature itself. When our data were pooled with a global dataset, the previously observed positive correlation between leaf N and mean annual temperature (MAT) at very low MATs, disappeared. Thus, our data do not support the previously proposed biogeochemical hypothesis that low temperature limitations on mineralization of organic matter and N availability in soils lead to low leaf N in cold environments.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000240338500013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Ecology; SCI(E); PubMed; 69; ARTICLE; 1; 115-122; 149
语种	英语
出处	PubMed ; SCI
出版者	oecologia
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/198911]
专题	数学科学学院 城市与环境学院
推荐引用方式 GB/T 7714	He, Jin-Sheng,Fang, Jingyun,Wang, Zhiheng,et al. Stoichiometry and large-scale patterns of leaf carbon and nitrogen in the grassland biomes of China. 2006-01-01.

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