Arid
DOI10.1007/s10661-015-4707-z
Spatial and climatic patterns of the relative abundance of poisonous vs. non-poisonous plants across the Northern Tibetan Plateau
Wu, Jianshuang1,2; Yang, Pengwan1,3; Zhang, Xianzhou1; Shen, Zhenxi1; Yu, Chengqun1
通讯作者Wu, Jianshuang
来源期刊ENVIRONMENTAL MONITORING AND ASSESSMENT
ISSN0167-6369
EISSN1573-2959
出版年2015
卷号187期号:8
英文摘要

It is the most serious challenge to promote degraded grassland recovery currently facing the developing Tibetan Autonomous Region. We conducted field surveys of 75 grazing sites between 2009 and 2012 across the Northern Tibetan Plateau and described the spatial and climatic patterns of the occurrence of poisonous plants. Our results showed lower ratios of species richness (SprRatio), coverage (CovRatio), and biomass (BioRatio) of non-poisonous vs. poisonous plants in the semi-arid alpine steppe zone, where the growing season precipitation (GSP) is between 250 and 350 mm; however, this result is in contrast to the relatively wetter meadow (GSP >350 mm) and much drier desert-steppe (GSP <250mm) communities. Results from generalized additive models (GAMs) further confirmed that precipitation is primarily responsible for the initially decreasing and then increasing tendency of compositional ratios of non-poisonous to poisonous species. The wide confidence bands at GSP <250 mm indicated that precipitation is not an effective indicator for predicting compositional changes in desert-steppe communities. When mean annual livestock grazing pressure was incorporated into the optimal GAMs, the model performance improved: the Akaike information criterion (AIC) decreased by 1.20 for SprRatio and 3.09 for BioRatio, and the deviance explained (R2) increased by 6.0 % for SprRatio and 3.6 % for BioRatio. Therefore, more detailed information on grazing disturbance (timing, frequency, and density) should be collected to disentangle the relative contribution of climate change and grazing activities to changes in community assembly and ecological functions of alpine grasslands on the Northern Tibetan Plateau.


英文关键词Alpine grasslands Climate gradients Generalized additive model Grazing disturbance Growing season precipitation
类型Article
语种英语
国家Peoples R China ; Germany
收录类别SCI-E
WOS记录号WOS:000358782300010
WOS关键词NET PRIMARY PRODUCTION ; ALPINE GRASSLANDS ; PERMAFROST DEGRADATION ; ABOVEGROUND BIOMASS ; GRAZING-EXCLUSION ; IMPACT ; PRECIPITATION ; PRODUCTIVITY ; DIVERSITY ; RICHNESS
WOS类目Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
来源机构中国科学院地理科学与资源研究所
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187117
作者单位1.Chinese Acad Sci, Lhasa Plateau Ecosyst Res Stn, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China;
2.Free Univ Berlin, Funct Biodivers, Dahlem Ctr Plant Sci, D-14195 Berlin, Germany;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Wu, Jianshuang,Yang, Pengwan,Zhang, Xianzhou,et al. Spatial and climatic patterns of the relative abundance of poisonous vs. non-poisonous plants across the Northern Tibetan Plateau[J]. 中国科学院地理科学与资源研究所,2015,187(8).
APA Wu, Jianshuang,Yang, Pengwan,Zhang, Xianzhou,Shen, Zhenxi,&Yu, Chengqun.(2015).Spatial and climatic patterns of the relative abundance of poisonous vs. non-poisonous plants across the Northern Tibetan Plateau.ENVIRONMENTAL MONITORING AND ASSESSMENT,187(8).
MLA Wu, Jianshuang,et al."Spatial and climatic patterns of the relative abundance of poisonous vs. non-poisonous plants across the Northern Tibetan Plateau".ENVIRONMENTAL MONITORING AND ASSESSMENT 187.8(2015).
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