干旱区生态环境知识资源中心(Arid): Extreme drought affects the productivity, but not the composition, of a desert plant community in Central Asia differentially across microtopographies

Arid

DOI	10.1016/j.scitotenv.2020.137251
	Extreme drought affects the productivity, but not the composition, of a desert plant community in Central Asia differentially across microtopographies
	Zang, Yong-Xin 1,2,3; Min, Xiao-Jun 1,2,3; Resco de Dios, Victor 4,5,6; Ma, Jian-Ying 1,2; Sun, Wei 7
通讯作者	Ma, Jian-Ying ; Sun, Wei
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	717
英文摘要	Extreme climatic conditions are major drivers of ecosystem function and dynamics and their frequency is increasing under climate change. Climatic conditions interact with local microtopography, which might either buffer or exacerbate the degree of climatic stress. Here we sought to understand how extremely dry growing seasons affected the composition and productivity of desert ephemeral communities growing in sand dunes from the Gurbantunggut desert in Central Asia, and to which extent did microtopography modulate the response. We set up a rainfall manipulation study on four sand dune microtopographies and, during two consecutive years, we measured soil moisture, nutrients and texture, ephemeral layer composition, plant phenology, biomass accumulation and biomass allocation patterns for the dominant species. We observed significant biomass reductions during the extreme drought but plant community richness and composition were not affected, indicating that the composition of the ephemeral layer in this desert ecosystem may resist under extreme conditions. Additionally, extreme drought increased biomass allocation to reproductive organs of the dominant species. There were also significant microtopographic effects as the sensitivity of biomass to drought in western aspects was larger than in eastern aspects. Our results indicate that previously overlooked microtopographical differences may mediate the impact of climate change on plant communities. (c) 2020 Elsevier B.V. All rights reserved.
英文关键词	Cold desert Microtopography Extreme drought Ephemeral plants
类型	Article
语种	英语
国家	Peoples R China ; Spain
收录类别	SCI-E
WOS记录号	WOS:000519994800054
WOS关键词	BIOLOGICAL SOIL CRUSTS ; ECOSYSTEM STABILITY ; ALLOCATION PATTERNS ; BIOMASS ALLOCATION ; EPHEMERAL PLANTS ; WATER ; RESPONSES ; PRECIPITATION ; NITROGEN ; GROWTH
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319119
作者单位	1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi, Peoples R China; 2.Chinese Acad Sci, Fukang Stn Desert Ecol, Fukang, Peoples R China; 3.Univ Chinese Acad Sci, Beijing, Peoples R China; 4.Southwest Univ Sci & Technol, Sch Life Sci & Engn, Mianyang, Sichuan, Peoples R China; 5.Univ Lleida, Dept Crop & Forest Sci, Lleida, Spain; 6.Univ Lleida, Agrotecnio Ctr, Lleida, Spain; 7.Northeast Normal Univ, Minist Educ, Inst Grassland Sci, Key Lab Vegetat Ecol, Changchun 130024, Peoples R China
推荐引用方式 GB/T 7714	Zang, Yong-Xin,Min, Xiao-Jun,Resco de Dios, Victor,et al. Extreme drought affects the productivity, but not the composition, of a desert plant community in Central Asia differentially across microtopographies[J]. 中国科学院新疆生态与地理研究所,2020,717.
APA	Zang, Yong-Xin,Min, Xiao-Jun,Resco de Dios, Victor,Ma, Jian-Ying,&Sun, Wei.(2020).Extreme drought affects the productivity, but not the composition, of a desert plant community in Central Asia differentially across microtopographies.SCIENCE OF THE TOTAL ENVIRONMENT,717.
MLA	Zang, Yong-Xin,et al."Extreme drought affects the productivity, but not the composition, of a desert plant community in Central Asia differentially across microtopographies".SCIENCE OF THE TOTAL ENVIRONMENT 717(2020).