气候变化领域集成服务门户(CCPortal): Drought of early time in growing season decreases community aboveground biomass, but increases belowground biomass in a desert steppe

CCPortal

DOI	10.1186/s12862-021-01842-5
	Drought of early time in growing season decreases community aboveground biomass, but increases belowground biomass in a desert steppe
	Li, Xiangyun; Zuo, Xiaoan; Yue, Ping; Zhao, Xueyong; Hu, Ya; Guo, Xinxin; Guo, Aixia; Xu, Chong; Yu, Qiang
通讯作者	Zuo, XA (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Peoples R China.
发表日期	2021
EISSN	2730-7182
卷号	21 期号:1
英文摘要	Background Increasing drought induced by global climate changes is altering the structure and function of grassland ecosystems. However, there is a lack of understanding of how drought affects the trade-off of above- and belowground biomass in desert steppe. We conducted a four-year (2015-2018) drought experiment to examine the responses of community above-and belowground biomass (AGB and BGB) to manipulated drought and natural drought in the early period of growing season (from March to June) in a desert steppe. We compared the associations of drought with species diversity (species richness and density), community-weighted means (CWM) of five traits, and soil factors (soil Water, soil carbon content, and soil nitrogen content) for grass communities. Meanwhile, we used the structural equation modeling (SEM) to elucidate whether drought affects AGB and BGB by altering species diversity, functional traits, or soil factors. Results We found that manipulated drought affected soil water content, but not on soil carbon and nitrogen content. Experimental drought reduced the species richness, and species modified the CWM of traits to cope with a natural drought of an early time in the growing season. We also found that the experimental and natural drought decreased AGB, while natural drought increased BGB. AGB was positively correlated with species richness, density, CWM of plant height, and soil water. BGB was negatively correlated with CWM of plant height, CWM of leaf dry matter content, and soil nitrogen content, while was positively correlated with CWM of specific leaf area, CWM of leaf nitrogen content, soil water, and soil carbon content. The SEM results indicated that the experimental and natural drought indirectly decreased AGB by reducing species richness and plant height, while natural drought and soil nitrogen content directly affected BGB. Conclusions These results suggest that species richness and functional traits can modulate the effects of drought on AGB, however natural drought and soil nitrogen determine BGB. Our findings demonstrate that the long-term observation and experiment are necessary to understand the underlying mechanism of the allocation and trade-off of community above-and belowground biomass.
关键词	PLANT FUNCTIONAL TRAITS EXTREME DROUGHT SPECIES-DIVERSITY SOIL PROPERTIES ROOT BIOMASS PATTERNS PRODUCTIVITY GRASSLAND RESPONSES CLIMATE
英文关键词	Precipitation changes; Species diversity; Plant traits; Plant biomass
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity
WOS类目	Ecology ; Evolutionary Biology ; Genetics & Heredity
WOS记录号	WOS:000658937300001
来源期刊	BMC ECOLOGY AND EVOLUTION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253688
作者单位	[Li, Xiangyun; Zuo, Xiaoan; Yue, Ping; Zhao, Xueyong; Hu, Ya; Guo, Xinxin; Guo, Aixia] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Peoples R China; [Li, Xiangyun; Hu, Ya; Guo, Xinxin; Guo, Aixia] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zuo, Xiaoan; Zhao, Xueyong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Lanzhou 730000, Peoples R China; [Li, Xiangyun; Zuo, Xiaoan; Yue, Ping; Zhao, Xueyong; Hu, Ya; Guo, Xinxin; Guo, Aixia] Key Lab Stress Physiol & Ecol Cold & Arid Reg, Lanzhou 730000, Gansu, Peoples R China; [Xu, Chong; Yu, Qiang] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 10008, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiangyun,Zuo, Xiaoan,Yue, Ping,et al. Drought of early time in growing season decreases community aboveground biomass, but increases belowground biomass in a desert steppe[J]. 中国科学院西北生态环境资源研究院,2021,21(1).
APA	Li, Xiangyun.,Zuo, Xiaoan.,Yue, Ping.,Zhao, Xueyong.,Hu, Ya.,...&Yu, Qiang.(2021).Drought of early time in growing season decreases community aboveground biomass, but increases belowground biomass in a desert steppe.BMC ECOLOGY AND EVOLUTION,21(1).
MLA	Li, Xiangyun,et al."Drought of early time in growing season decreases community aboveground biomass, but increases belowground biomass in a desert steppe".BMC ECOLOGY AND EVOLUTION 21.1(2021).