干旱区生态环境知识资源中心(Arid): Effects of long-term warming on the aboveground biomass and species diversity in an alpine meadow on the Qinghai-Tibetan Plateau of China

Arid

DOI	10.1007/s40333-020-0064-z
	Effects of long-term warming on the aboveground biomass and species diversity in an alpine meadow on the Qinghai-Tibetan Plateau of China
	Wen, Jing; Qin, Ruimin; Zhang, Shixiong; Yang, Xiaoyan; Xu, Manhou
通讯作者	Xu, Manhou
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2020
卷号	12 期号:2 页码:252-266
英文摘要	Ecosystems in high-altitude regions are more sensitive and respond more rapidly than other ecosystems to global climate warming. The Qinghai-Tibet Plateau (QTP) of China is an ecologically fragile zone that is sensitive to global climate warming. It is of great importance to study the changes in aboveground biomass and species diversity of alpine meadows on the QTP under predicted future climate warming. In this study, we selected an alpine meadow on the QTP as the study object and used infrared radiators as the warming device for a simulation experiment over eight years (2011-2018). We then analyzed the dynamic changes in aboveground biomass and species diversity of the alpine meadow at different time scales, including an early stage of warming (2011-2013) and a late stage of warming (2016-2018), in order to explore the response of alpine meadows to short-term (three years) and long-term warming (eight years). The results showed that the short-term warming increased air temperature by 0.31 degrees C and decreased relative humidity by 2.54%, resulting in the air being warmer and drier. The long-term warming increased air temperature and relative humidity by 0.19 degrees C and 1.47%, respectively, and the air tended to be warmer and wetter. The short-term warming increased soil temperature by 2.44 degrees C and decreased soil moisture by 12.47%, whereas the long-term warming increased soil temperature by 1.76 degrees C and decreased soil moisture by 9.90%. This caused the shallow soil layer to become warmer and drier under both short-term and longterm warming. Furthermore, the degree of soil drought was alleviated with increased warming duration. Under the long-term warming, the importance value and aboveground biomass of plants in different families changed. The importance values of grasses and sedges decreased by 47.56% and 3.67%, respectively, while the importance value of weeds increased by 1.37%. Aboveground biomass of grasses decreased by 36.55%, while those of sedges and weeds increased by 8.09% and 15.24%, respectively. The increase in temperature had a non-significant effect on species diversity. The species diversity indices increased at the early stage of warming and decreased at the late stage of warming, but none of them reached significant levels (P>0.05). Species diversity had no significant correlation with soil temperature and soil moisture under both short-term and long-term warming. Soil temperature and aboveground biomass were positively correlated in the control plots (P=0.014), but negatively correlated under the long-term warming (P=0.013). Therefore, eight years of warming aggravated drought in the shallow soil layer, which is beneficial for the growth of weeds but not for the growth of grasses. Warming changed the structure of alpine meadow communities and had a certain impact on the community species diversity. Our studies have great significance for the protection and effective utilization of alpine vegetation, as well as for the prevention of grassland degradation or desertification in high-altitude regions.
英文关键词	climate warming long-term warming species diversity indices aboveground biomass soil microclimate correlation analysis alpine meadows
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000522574200003
WOS关键词	PLANT COMMUNITY ; TEMPORAL STABILITY ; CLIMATE-CHANGE ; RESPONSES ; VEGETATION ; ECOSYSTEM ; GROWTH ; GRADIENT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314893
作者单位	Taiyuan Normal Univ, Jinzhong 030619, Peoples R China
推荐引用方式 GB/T 7714	Wen, Jing,Qin, Ruimin,Zhang, Shixiong,et al. Effects of long-term warming on the aboveground biomass and species diversity in an alpine meadow on the Qinghai-Tibetan Plateau of China[J],2020,12(2):252-266.
APA	Wen, Jing,Qin, Ruimin,Zhang, Shixiong,Yang, Xiaoyan,&Xu, Manhou.(2020).Effects of long-term warming on the aboveground biomass and species diversity in an alpine meadow on the Qinghai-Tibetan Plateau of China.JOURNAL OF ARID LAND,12(2),252-266.
MLA	Wen, Jing,et al."Effects of long-term warming on the aboveground biomass and species diversity in an alpine meadow on the Qinghai-Tibetan Plateau of China".JOURNAL OF ARID LAND 12.2(2020):252-266.