气候变化领域集成服务门户(CCPortal): Relationship between plant species diversity and aboveground biomass in alpine grasslands on the Qinghai-Tibet Plateau: Spatial patterns and the factors driving them

CCPortal

DOI	10.3389/fevo.2023.1138884
	Relationship between plant species diversity and aboveground biomass in alpine grasslands on the Qinghai-Tibet Plateau: Spatial patterns and the factors driving them
	Yang, Mingxin; Chen, Ang; Zhang, Min; Gu, Qiang; Wang, Yanhe; Guo, Jian; Yang, Dong; Zhao, Yun; Huang, Qingdongzhi; Ma, Leichao; Yang, Xiuchun
发表日期	2023
ISSN	2296-701X
卷号	11
英文摘要	Alpine grasslands are important ecosystems on the Qinghai-Tibet Plateau and are extremely sensitive to climate change. However, the spatial responses of plant species diversity and biomass in alpine grasslands to environmental factors under the background of global climate change have not been thoroughly characterized. In this study, a random forest model was constructed using grassland ground monitoring data with satellite remote sensing data and environmental variables to characterize the plant species diversity and aboveground biomass of grasslands in the Three-River Headwaters Region within the Qinghai-Tibet Plateau and analyze spatial variation in the relationship between the plant species diversity and aboveground biomass and their driving factors. The results show that (1) the selection of characteristic variables can effectively improve the accuracy of random forest models. The stepwise regression variable selection method was the most effective approach, with an R-2 of 0.60 for the plant species diversity prediction model and 0.55 for the aboveground biomass prediction model, (2) The spatial distribution patterns of the plant species diversity and aboveground biomass in the study area were similar, they were both high in the southeast and low in the northwest and gradually decreased from east to west. The relationship between the plant species diversity and aboveground biomass varied spatially, they were mostly positively correlated (67.63%), but they were negatively correlated in areas with low and high values of plant species diversity and aboveground biomass, and (3) Analysis with geodetector revealed that longitude, average annual precipitation, and elevation were the main factors driving variation in the plant species diversity and aboveground biomass relationship. We characterized plant species diversity and aboveground biomass, as well as their spatial relationships, over a large spatial scale. Our data will aid biodiversity monitoring and grassland conservation management, as well as future studies aimed at clarifying the relationship between biodiversity and ecosystem functions.
关键词	remote sensing plant species diversity random forest model plant species diversity and aboveground biomass relationships driving factors Qinghai-Tibet Plateau
英文关键词	PRODUCTIVITY; ECOSYSTEM; RICHNESS; BIODIVERSITY; CLIMATE
WOS研究方向	Ecology
WOS记录号	WOS:000977142400001
来源期刊	FRONTIERS IN ECOLOGY AND EVOLUTION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282934
作者单位	China Geological Survey; Beijing Forestry University; Beijing Normal University; Beijing Normal University; China Geological Survey
推荐引用方式 GB/T 7714	Yang, Mingxin,Chen, Ang,Zhang, Min,et al. Relationship between plant species diversity and aboveground biomass in alpine grasslands on the Qinghai-Tibet Plateau: Spatial patterns and the factors driving them[J],2023,11.
APA	Yang, Mingxin.,Chen, Ang.,Zhang, Min.,Gu, Qiang.,Wang, Yanhe.,...&Yang, Xiuchun.(2023).Relationship between plant species diversity and aboveground biomass in alpine grasslands on the Qinghai-Tibet Plateau: Spatial patterns and the factors driving them.FRONTIERS IN ECOLOGY AND EVOLUTION,11.
MLA	Yang, Mingxin,et al."Relationship between plant species diversity and aboveground biomass in alpine grasslands on the Qinghai-Tibet Plateau: Spatial patterns and the factors driving them".FRONTIERS IN ECOLOGY AND EVOLUTION 11(2023).