干旱区生态环境知识资源中心(Arid): Impacts of grazing exclusion on productivity partitioning along regional plant diversity and climatic gradients in Tibetan alpine grasslands

Arid

DOI	10.1016/j.jenvman.2018.10.097
	Impacts of grazing exclusion on productivity partitioning along regional plant diversity and climatic gradients in Tibetan alpine grasslands
	Wu, Jianshuang 1,2,5; Li, Meng 1; Fiedler, Sebastian 2; Ma, Weiling 1; Wang, Xiangtao 1,3; Zhang, Xianzhou 1; Tietjen, Britta 2,4
通讯作者	Wu, Jianshuang
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2019
卷号	231 页码:635-645
英文摘要	The biodiversity-productivity relationship is critical for better predicting ecosystem responses to climate change and human disturbance. However, it remains unclear about the effects of climate change, land use shifts, plant diversity, and their interactions on productivity partitioning above- and below-ground components in alpine grasslands on the Tibetan Plateau. To answer this question, we conducted field surveys at 33 grazed vs. fenced paired sites that are distributed across the alpine meadow, steppe, and desert-steppe zones on the northern Tibetan Plateau in early August of 2010-2013. Generalized additive models (GAMs) showed that aboveground net primary productivity (ANPP) linearly increased with growing season precipitation (GSP) while belowground net primary productivity (BNPP) decreased with growing season temperature (GST). Compared to grazed sites, short-term fencing did not alter the patterns of ANPP along climatic gradients but tended to decrease BNPP at moderate precipitation levels of 200 mm < GSP < 450 mm. We also found that ANPP and BNPP linearly increased with species richness, ANPP decreased with Shannon diversity index, and BNPP did not correlate with the Shannon diversity index. Fencing did not alter the relationships between productivity components and plant diversity indices. Generalized additive mixed models furtherly confirmed that the interaction of localized plant diversity and climatic condition nonlinearly regulated productivity partitioning of alpine grasslands in this area. Finally, structural equation models (SEMs) revealed the direction and strength of causal links between biotic and abiotic variables within alpine grassland ecosystems. ANPP was controlled directly by GSP (0.53) and indirectly via species richness (0.41) and Shannon index (- 0.12). In contrast, BNPP was influenced directly by GST (- 0.43) and indirectly by GSP via species richness (0.05) and Shannon index (- 0.02). Therefore, we recommend using a joint approach of GAMs and SEMs for better understanding mechanisms behind the relationship between biodiversity and ecosystem function under climate change and human disturbance.
英文关键词	Biodiversity-productivity relationship Biomass allocation Ecological network Generalized additive model Structural equation model
类型	Article
语种	英语
国家	Peoples R China ; Germany
收录类别	SCI-E
WOS记录号	WOS:000456641100068
WOS关键词	PRECIPITATION GRADIENT ; USE EFFICIENCY ; ECOSYSTEM ; BIODIVERSITY ; VEGETATION ; CARBON ; NITROGEN ; BIOMASS ; STORAGE ; PLATEAU
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/2XILL650/216956
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Lhasa Natl Ecol Res Stn, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China; 2.Free Univ Berlin, Inst Biol, Biodivers Theoret Ecol, D-14195 Berlin, Germany; 3.Xizang Agr & Anim Husb Coll, Dept Anim Sci, Linzhi 860000, Peoples R China; 4.Berlin Brandenburg Inst Adv Biodivers Res BBIB, D-14195 Berlin, Germany; 5.Altensteinstr 34, D-14195 Berlin, Germany
推荐引用方式 GB/T 7714	Wu, Jianshuang,Li, Meng,Fiedler, Sebastian,et al. Impacts of grazing exclusion on productivity partitioning along regional plant diversity and climatic gradients in Tibetan alpine grasslands[J]. 中国科学院地理科学与资源研究所,2019,231:635-645.
APA	Wu, Jianshuang.,Li, Meng.,Fiedler, Sebastian.,Ma, Weiling.,Wang, Xiangtao.,...&Tietjen, Britta.(2019).Impacts of grazing exclusion on productivity partitioning along regional plant diversity and climatic gradients in Tibetan alpine grasslands.JOURNAL OF ENVIRONMENTAL MANAGEMENT,231,635-645.
MLA	Wu, Jianshuang,et al."Impacts of grazing exclusion on productivity partitioning along regional plant diversity and climatic gradients in Tibetan alpine grasslands".JOURNAL OF ENVIRONMENTAL MANAGEMENT 231(2019):635-645.