气候变化领域集成服务门户(CCPortal): Precipitation Variability Affects Aboveground Biomass Directly and Indirectly via Plant Functional Traits in the Desert Steppe of Inner Mongolia, Northern China

CCPortal

DOI	10.3389/fpls.2021.674527
	Precipitation Variability Affects Aboveground Biomass Directly and Indirectly via Plant Functional Traits in the Desert Steppe of Inner Mongolia, Northern China
	Cheng, Huan; Gong, Yuanbo; Zuo, Xiaoan
通讯作者	Gong, YB (通讯作者)，Sichuan Agr Univ, Coll Forestry, Chengdu, Peoples R China.
发表日期	2021
ISSN	1664-462X
卷号	12
英文摘要	Clarifying the response of community and dominance species to climate change is crucial for disentangling the mechanism of the ecosystem evolution and predicting the prospective dynamics of communities under the global climate scenario. We examined how precipitation changes affect community structure and aboveground biomass (AGB) according to manipulated precipitation experiments in the desert steppe of Inner Mongolia, China. Bayesian model and structural equation models (SEM) were used to test variation and causal relationship among precipitation, plant diversity, functional attributes, and AGB. The results showed that the responses of species richness, evenness, and plant community weighted means traits to precipitation changes in amount and year were significant. The SEM demonstrated that precipitation change in amount and year has a direct effect on richness, evenness, and community-weighted mean (CWM) for height, leaf area (LA), specific leaf area (SLA), leaf dry matter content (LDMC), leaf nitrogen content (LNC), and leaf carbon content (LCC) and AGB; there into CWM for height and LDMC had a direct positive effect on AGB; LA had a direct negative effect on AGB. Three dominant species showed diverse adaptation and resource utilization strategies in response to precipitation changes. A. polyrhizum showed an increase in height under the precipitation treatments that promoted AGB, whereas the AGB of P. harmala and S. glareosa was boosted through alterations in height and LA. Our results highlight the asynchronism of variation in community composition and structure, leaf functional traits in precipitation-AGB relationship. We proposed that altered AGB resulted from the direct and indirect effects of plant functional traits (plant height, LA, LDMC) rather than species diversity, plant functional traits are likely candidate traits, given that they are mechanistically linked to precipitation changes and affected aboveground biomass in a desert steppe.
关键词	ECOSYSTEM FUNCTION CLIMATE-CHANGE LEAF TRAITS PRODUCTIVITY RESPONSES MONSOON PRECIPITATION ENVIRONMENTAL-CHANGE NITROGEN DEPOSITION SOIL RESPIRATION GLOBAL PATTERNS GRASSLAND
英文关键词	precipitation; plant functional trafts; aboveground biomass; ecosystem function; desert steppe
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000684986800009
来源期刊	FRONTIERS IN PLANT SCIENCE
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/254046
作者单位	[Cheng, Huan; Gong, Yuanbo] Sichuan Agr Univ, Coll Forestry, Chengdu, Peoples R China; [Cheng, Huan] Univ Maryland, Dept Biol, College Pk, MD 20742 USA; [Zuo, Xiaoan] Chinese Acad Sci, Urat Desert Grassland Res Stn, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Huan,Gong, Yuanbo,Zuo, Xiaoan. Precipitation Variability Affects Aboveground Biomass Directly and Indirectly via Plant Functional Traits in the Desert Steppe of Inner Mongolia, Northern China[J]. 中国科学院西北生态环境资源研究院,2021,12.
APA	Cheng, Huan,Gong, Yuanbo,&Zuo, Xiaoan.(2021).Precipitation Variability Affects Aboveground Biomass Directly and Indirectly via Plant Functional Traits in the Desert Steppe of Inner Mongolia, Northern China.FRONTIERS IN PLANT SCIENCE,12.
MLA	Cheng, Huan,et al."Precipitation Variability Affects Aboveground Biomass Directly and Indirectly via Plant Functional Traits in the Desert Steppe of Inner Mongolia, Northern China".FRONTIERS IN PLANT SCIENCE 12(2021).