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Precipitation reduction alters herbaceous community structure and composition in a savanna
Jin, Yanqiang1; Li, Jing2; Liu, Chenggang1; Liu, Yuntong; Zhang, Yiping; Song, Qinghai; Sha, Liqing; Balasubramanian, Durairaj; Chen, Aiguo3; Yang, Daxin3; Li, Peiguang4
2019
Source PublicationJOURNAL OF VEGETATION SCIENCE
ISSN1100-9233
VolumexIssue:xPages:-
Abstract

Questions In the changing climate scenario, the decline in precipitation is expected to alter water availability for plants, which in turn affects plant community structure and composition. The responses of community composition and structure to declines in precipitation are well documented in other biomes but remain understudied in water-limited savannas. Location A savanna ecosystem in southwest China. Methods We used a four-year (2014-2017) precipitation manipulation experiment to examine changes in herbaceous community composition and structure across the species, functional group and community levels under precipitation reduction. Results Precipitation reduction significantly decreased the average height and percentage cover of the herbaceous community, while increasing species richness and the Pielou evenness index. Precipitation reduction significantly decreased average height, percentage cover and relative abundance of graminoids and perennials, but increased those of forbs and annuals. Precipitation reduction prompted a shift in the dominant species of the herbaceous community towards Fimbristylis monostachya. Conclusions The results show that precipitation reduction changed the composition and structure of the herbaceous community of this savanna. Furthermore, they provide strong evidence that changes in herbaceous community structure and composition in response to the intensity and duration of precipitation reduction in this savanna exhibited relatively low thresholds, which suggests that the herbaceous community's response to a decline in precipitation was essentially nonlinear. These findings imply that even relatively small declines in precipitation may stimulate shifts in plant community structure and composition and affect the function and stability of savanna ecosystems.

KeywordPLANT DIVERSITY CLIMATE-CHANGE RAINFALL VARIABILITY FUNCTIONAL DIVERSITY ECOSYSTEM FUNCTION SPECIES-DIVERSITY DROUGHT DYNAMICS RESISTANCE PRODUCTIVITY
Subject AreaPlant Sciences ; Environmental Sciences & Ecology ; Forestry
DOI10.1111/jvs.12766
Indexed BySCI
Language英语
WOS IDWOS:000474151700001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11337
Collection全球变化研究组
Affiliation1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Forest Ecol, Menglun 666303, Peoples R China
2.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Plant Resources & Sustainable Us, Menglun, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Yuanjiang Savanna Ecosyst Res Stn, Yuanjiang, Peoples R China
5.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yellow River Delta Ecol Res Stn Coastal Wetland, Yantai, Peoples R China
Recommended Citation
GB/T 7714
Jin, Yanqiang,Li, Jing,Liu, Chenggang,et al. Precipitation reduction alters herbaceous community structure and composition in a savanna[J]. JOURNAL OF VEGETATION SCIENCE,2019,x(x):-.
APA Jin, Yanqiang.,Li, Jing.,Liu, Chenggang.,Liu, Yuntong.,Zhang, Yiping.,...&Li, Peiguang.(2019).Precipitation reduction alters herbaceous community structure and composition in a savanna.JOURNAL OF VEGETATION SCIENCE,x(x),-.
MLA Jin, Yanqiang,et al."Precipitation reduction alters herbaceous community structure and composition in a savanna".JOURNAL OF VEGETATION SCIENCE x.x(2019):-.
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