气候变化领域集成服务门户(CCPortal): Long-Term Effects of Altered Precipitation Patterns on Alpine Vegetation Species Composition on the Qinghai-Tibet Plateau

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DOI	10.3390/f14010047
	Long-Term Effects of Altered Precipitation Patterns on Alpine Vegetation Species Composition on the Qinghai-Tibet Plateau
	Ni, Xiangnan; Guo, Wei; Liu, Tong; Li, Shuheng; Zhang, Junzhe
发表日期	2023
EISSN	1999-4907
卷号	14 期号:1
英文摘要	Changes in global precipitation patterns have had important impacts on terrestrial ecosystems. However, the relationship between alpine vegetation species composition and precipitation patterns remained uncertain. Based on in situ observations, long-term datasets of monthly aboveground biomass (AGB) and daily precipitation were applied in an alpine grassland on the Qinghai-Tibet Plateau (QTP), in order to characterize the responses of multi-species biomass to changing rainfall patterns. In this study, vegetation species composition exhibited obvious variations during 1997-2011 in alpine grasslands on the Qinghai-Tibet Plateau. Rapid increases in weed, Kobresia humilis, and Poa crymophila Keng squeezed the living space of the dominant species, Stipa sareptana var. krylovii. Meanwhile, effective precipitation had stronger effects on vegetation biomass, which were heterogeneous in different precipitation periods. Therefore, the crucial effective precipitation, accounting the effective precipitation in crucial periods, could better explain vegetation biomass variations, which could be a new representative climatic indicator to accurately describe vegetation change in alpine grasslands. In addition, crucial periods of effective precipitation appeared to influence heterogeneity for different vegetation species, which showed the heterogeneous adaptability of species to the changes in precipitation patterns. Precipitation patterns during 1997-2011 were more conducive to the growth of Poa crymophila Keng and Kobresia humilis, thereby changing the species composition in alpine grasslands. The coupling of biological environmental adaptability and abiotic crucial effective precipitation determined the variations of vegetation species composition. The new indicator of crucial effective precipitation could provide a new perspective for studying and predicting the species dynamics of alpine grassland.
关键词	effective precipitation alpine grassland aboveground biomass species composition
英文关键词	NET PRIMARY PRODUCTIVITY; CLIMATE-CHANGE; PLANT-COMMUNITIES; RAINFALL INTENSITY; DYNAMICS; INCREASES; VARIABILITY; GRASSLANDS; RESISTANCE; DIVERSITY
WOS研究方向	Forestry
WOS记录号	WOS:000915227600001
来源期刊	FORESTS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283073
作者单位	Xi'an Jiaotong University; Northwest University Xi'an; University of California System; University of California Los Angeles
推荐引用方式 GB/T 7714	Ni, Xiangnan,Guo, Wei,Liu, Tong,et al. Long-Term Effects of Altered Precipitation Patterns on Alpine Vegetation Species Composition on the Qinghai-Tibet Plateau[J],2023,14(1).
APA	Ni, Xiangnan,Guo, Wei,Liu, Tong,Li, Shuheng,&Zhang, Junzhe.(2023).Long-Term Effects of Altered Precipitation Patterns on Alpine Vegetation Species Composition on the Qinghai-Tibet Plateau.FORESTS,14(1).
MLA	Ni, Xiangnan,et al."Long-Term Effects of Altered Precipitation Patterns on Alpine Vegetation Species Composition on the Qinghai-Tibet Plateau".FORESTS 14.1(2023).