气候变化领域集成服务门户(CCPortal): Annual ring widths are good predictors of changes in net primary productivity of alpine Rhododendron shrubs in the Sergyemla Mountains, southeast Tibet

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DOI	10.1007/s11258-012-0140-3
	Annual ring widths are good predictors of changes in net primary productivity of alpine Rhododendron shrubs in the Sergyemla Mountains, southeast Tibet
	Kong, Gaoqiang; Luo, Tianxiang; Liu, Xinsheng; Zhang, Lin; Liang, Eryuan
通讯作者	Luo, TX (通讯作者)
发表日期	2012
ISSN	1385-0237
EISSN	1573-5052
起始页码	1843
结束页码	1855
卷号	213 期号:11
英文摘要	It is unclear whether annual ring widths (ARW) are good predictors of changes in net primary productivity (NPP) of trees or shrubs in cold environments. We test if the simulated NPP with inputs of observed leaf nitrogen concentration (N (mass)) and carbon isotope ratio (delta C-13) explains altitudinal variations of ARW, relative growth rate (RGR), and maximum photosynthetic rate (P (max)) within a widespread woody species at moist timberline ecotones. We measured plant-level ARW and RGR, and related leaf traits (P (max), N (mass), delta C-13 etc.) for an alpine Rhododendron shrub (R. aganniphum var. schizopeplum) across ten altitudes (4,190-4,500 m) in the Sergyemla Mountains, southeast Tibet. Based on climate data available from Nyingchi station at 3,000 m, non-age-related ARW chronologies (1960-2008) for each of ten altitudes were positively correlated with June mean temperature, but related little with precipitation and other monthly mean temperatures. With increasing altitude, N (mass) and P (max) decreased and delta C-13 increased, resulting in decreases of observed RGR and simulated NPP. Current-year and recent 50-year-averaged ARWs were well correlated with observed RGR and P (max) and simulated NPP. June mean temperature explained > 62 % of the altitudinal variations in observed RGR and ARW as well as simulated NPP. At moist high altitudes, ARWs can be used as predictors of changes in NPP of alpine shrubs because the low temperature in the early growing season is the primary factor limiting both ARW and NPP. This study suggests a methodology detecting the sensitivity of alpine woody species to varying climatic conditions.
关键词	CARBON-ISOTOPE DISCRIMINATION METROSIDEROS-POLYMORPHA SOIL-TEMPERATURE LEAF TRAITS TREE-GROWTH DELTA-C-13 NITROGEN TRENDS PLANTS LIMITATION
英文关键词	Alpine shrub; Carbon gain; Leaf traits; Ring-width growth; Timberline
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS记录号	WOS:000310833400014
来源期刊	PLANT ECOLOGY
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/257971
推荐引用方式 GB/T 7714	Kong, Gaoqiang,Luo, Tianxiang,Liu, Xinsheng,et al. Annual ring widths are good predictors of changes in net primary productivity of alpine Rhododendron shrubs in the Sergyemla Mountains, southeast Tibet[J]. 中国科学院青藏高原研究所,2012,213(11).
APA	Kong, Gaoqiang,Luo, Tianxiang,Liu, Xinsheng,Zhang, Lin,&Liang, Eryuan.(2012).Annual ring widths are good predictors of changes in net primary productivity of alpine Rhododendron shrubs in the Sergyemla Mountains, southeast Tibet.PLANT ECOLOGY,213(11).
MLA	Kong, Gaoqiang,et al."Annual ring widths are good predictors of changes in net primary productivity of alpine Rhododendron shrubs in the Sergyemla Mountains, southeast Tibet".PLANT ECOLOGY 213.11(2012).