气候变化领域集成服务门户(CCPortal): Leaf traits and associated ecosystem characteristics across subtropical and timberline forests in the Gongga Mountains, Eastern Tibetan Plateau

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DOI	10.1007/s00442-004-1729-6
	Leaf traits and associated ecosystem characteristics across subtropical and timberline forests in the Gongga Mountains, Eastern Tibetan Plateau
	Luo, TX; Luo, J; Pan, Y
发表日期	2005
ISSN	0029-8549
EISSN	1432-1939
起始页码	261
结束页码	273
卷号	142 期号:2
英文摘要	Knowledge of how leaf characteristics might be used to deduce information on ecosystem functioning and how this scaling task could be done is limited. In this study, we present field data for leaf lifespan, specific leaf area (SLA) and mass and area-based leaf nitrogen concentrations (N-mass, N-area) of dominant tree species and the associated stand foliage N-pool, leaf area index (LAI), root biomass, aboveground biomass, net primary productivity (NPP) and soil available-N content in six undisturbed forest plots along subtropical to timberline gradients on the eastern slope of the Gongga Mountains. We developed a methodology to calculate the whole-canopy mean leaf traits to include all tree species (groups) in each of the six plots through a series of weighted averages scaled up from leaf-level measurements. These defined whole-canopy mean leaf traits were equivalent to the traits of a leaf in regard to their Interrelationships and altitudinal trends, but were more useful for large-scale pattern analysis of ecosystem structure and function. The whole-canopy mean leaf lifespan and leaf N-mass mainly showed significant relationships with stand foliage N-pool, NPP, LAI and root biomass. In general, as elevation increased, the whole-canopy mean leaf lifespan and leaf N-area and stand LAI and foliage N-pool increased to their maximum, whereas the whole-canopy mean SLA and leaf N-mass and stand NPP and root biomass decreased from their maximum. The whole-canopy mean leaf lifespan and stand foliage N-pool both converged towards threshold-like logistic relationships with annual mean temperature and soil available-N variables. Our results are further supported by additional literature data in the Americas and eastern China.
关键词	AREA INDEX LIFE-SPAN NITROGEN CONCENTRATION STOMATAL CONDUCTANCE CONIFEROUS FORESTS USE EFFICIENCY CARBON GAIN PLANT PHOTOSYNTHESIS PRODUCTIVITY
英文关键词	altitudinal patterns; leaves; tree canopies; communities; scaling-up
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000226285000012
来源期刊	OECOLOGIA
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/257381
推荐引用方式 GB/T 7714	Luo, TX,Luo, J,Pan, Y. Leaf traits and associated ecosystem characteristics across subtropical and timberline forests in the Gongga Mountains, Eastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2005,142(2).
APA	Luo, TX,Luo, J,&Pan, Y.(2005).Leaf traits and associated ecosystem characteristics across subtropical and timberline forests in the Gongga Mountains, Eastern Tibetan Plateau.OECOLOGIA,142(2).
MLA	Luo, TX,et al."Leaf traits and associated ecosystem characteristics across subtropical and timberline forests in the Gongga Mountains, Eastern Tibetan Plateau".OECOLOGIA 142.2(2005).