气候变化领域集成服务门户(CCPortal): Correlations between net primary productivity and foliar carbon isotope ratio across a Tibetan ecosystem transect

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DOI	10.1111/j.1600-0587.2008.05735.x
	Correlations between net primary productivity and foliar carbon isotope ratio across a Tibetan ecosystem transect
	Luo, Tianxiang; Zhang, Lin; Zhu, Huazhong; Daly, Christopher; Li, Mingcai; Luo, Ji
通讯作者	Luo, TX (通讯作者)
发表日期	2009
ISSN	0906-7590
EISSN	1600-0587
起始页码	526
结束页码	538
卷号	32 期号:3
英文摘要	Warming climate could affect leaf-level carbon isotope composition (delta C-13) through variations in photosynthetic gas exchange. However, it is still unclear to what extent variations in foliar delta C-13 can be used to detect changes in net primary productivity (NPP) because leaf physiology is only one of many determinants of stand productivity. We aim to examine how well site-mean foliar delta C-13 and stand NPP co-vary across large resource gradients using data obtained from the Tibetan Alpine Vegetation Transects (1900-4900 m, TAVT). The TAVT data indicated a robust negative correlation between foliar delta C-13 and NPP across ecosystems (NPP=-2.7224 delta C-13-67.738, r(2)=0.60, p < 0.001). The mean foliar delta C-13 decreased with increasing annual precipitation and its covariation with mean temperature and soil organic carbon and nitrogen contents. The results were further confirmed by global literature data. Pooled delta C-13 data from global literature and this study explained 60% of variations in annual NPP both from TAVT-measures and MODIS-estimates across 67 sites. Our results appear to support a conceptual model relating foliar delta C-13 and nitrogen concentration (N-mass) to NPP, suggesting that: 1) there is a general (negative) relationship between delta C-13 and NPP across different water availability conditions; 2) in water-limited conditions, water availability has greater effects on NPP than N-mass; 3) when water is not limiting, NPP increases with increasing N-mass.
关键词	WATER-USE EFFICIENCY LEAF-AREA INDEX CANOPY PHOTOSYNTHESIS NITROGEN ALLOCATION RAINFALL GRADIENT NATURAL-ABUNDANCE ALPINE GRADIENTS ATMOSPHERIC CO2 DISCRIMINATION DELTA-C-13
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology
WOS记录号	WOS:000267659400018
来源期刊	ECOGRAPHY
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/257672
推荐引用方式 GB/T 7714	Luo, Tianxiang,Zhang, Lin,Zhu, Huazhong,et al. Correlations between net primary productivity and foliar carbon isotope ratio across a Tibetan ecosystem transect[J]. 中国科学院青藏高原研究所,2009,32(3).
APA	Luo, Tianxiang,Zhang, Lin,Zhu, Huazhong,Daly, Christopher,Li, Mingcai,&Luo, Ji.(2009).Correlations between net primary productivity and foliar carbon isotope ratio across a Tibetan ecosystem transect.ECOGRAPHY,32(3).
MLA	Luo, Tianxiang,et al."Correlations between net primary productivity and foliar carbon isotope ratio across a Tibetan ecosystem transect".ECOGRAPHY 32.3(2009).