气候变化领域集成服务门户(CCPortal): Leaf delta C-13 as an indicator of water availability along elevation gradients in the dry Himalayas

CCPortal

DOI	10.1016/j.ecolind.2018.07.002
	Leaf delta C-13 as an indicator of water availability along elevation gradients in the dry Himalayas
	Ale, Rita; Zhang, Lin; Li, Xiang; Raskoti, Bhakta Bahadur; Pugnaire, Francisco, I; Luo, Tianxiang
通讯作者	Luo, TX (通讯作者)
发表日期	2018
ISSN	1470-160X
EISSN	1872-7034
起始页码	266
结束页码	273
卷号	94
英文摘要	Understanding the variation of water availability along elevation gradients is essential for predicting the response of mountain ecosystems to global warming. However, it is challenging to precisely quantify water availability in dry mountains, especially in remote areas where climate records are limited. In dry habitats, leaf delta C-13 is highly sensitive to water availability. Here, we demonstrated how leaf delta C-13 of a widespread species could be used as an indicator of water availability in dry mountainous regions. We measured leaf delta C-13 and nitrogen content in one dominant forb and two cushion species along two elevational transects in the central Himalayas, Nepal. The Thornthwaite climatic moisture index was determined for each elevation site based on the 1-km(2) WorldClim data of monthly mean temperature and precipitation. We found that the elevational variation of delta C-13 in each of the three species was associated with precipitation, in which growing-season moisture index and annual precipitation were negatively correlated with delta C-13, regardless of elevation and temperature. Elevation and leaf nitrogen showed no significant relationship with leaf delta C-13. Thus, within-species leaf delta C-13 promises to be a simple and reliable indicator of environmental severity along elevation gradients, which can be easily quantified in remote high-mountain environments. Leaf delta C-13 would be a useful predictor of the change in water availability induced by warming in dry mountainous regions like the Himalayas
关键词	CARBON-ISOTOPE DISCRIMINATION METROSIDEROS-POLYMORPHA ALTITUDINAL TRENDS RAINFALL GRADIENT SOIL-MOISTURE PRECIPITATION PRODUCTIVITY RESPONSES NITROGEN NDVI
英文关键词	Alpine ecosystem; Carbon isotope; Dry mountains; Moisture index; Precipitation
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:000452692500027
来源期刊	ECOLOGICAL INDICATORS
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/259274
推荐引用方式 GB/T 7714	Ale, Rita,Zhang, Lin,Li, Xiang,et al. Leaf delta C-13 as an indicator of water availability along elevation gradients in the dry Himalayas[J]. 中国科学院青藏高原研究所,2018,94.
APA	Ale, Rita,Zhang, Lin,Li, Xiang,Raskoti, Bhakta Bahadur,Pugnaire, Francisco, I,&Luo, Tianxiang.(2018).Leaf delta C-13 as an indicator of water availability along elevation gradients in the dry Himalayas.ECOLOGICAL INDICATORS,94.
MLA	Ale, Rita,et al."Leaf delta C-13 as an indicator of water availability along elevation gradients in the dry Himalayas".ECOLOGICAL INDICATORS 94(2018).