Community assembly and functional leaf traits mediate precipitation use efficiency of alpine grasslands along environmental gradients on the Tibetan Plateau
Li, SW; Wu, JS
2016
Source PublicationPEERJ
ISSN2167-8359
Volume4Pages:-
AbstractThe alpine grasslands on the Tibetan Plateau are sensitive and vulnerable to climate change. However, it is still unknown how precipitation use efficiency (PUE), the ratio of aboveground net primary productivity (ANPP) to precipitation, is related to community assembly of plant species, functional groups or traits for the Tibetan alpine grasslands along actual environmental gradients. We conducted a multisite field survey at grazing-excluded pastures across meadow, steppe and desert-steppe to measure aboveground biomass (AGB) in August, 2010. We used species richness (SR), the Shannon diversity index, and cover-weighted functional group composition (FGC) of 1-xerophytes, 2-mesophytes, and 3-hygrophytes to describe community assembly at the species level; and chose community-level leaf area index (LAIc), specific leaf area (SLAc), and species-mixed foliar delta C-13 to quantify community assembly at the functional trait level. Our results showed that PUE decreased with increasing accumulated active temperatures (AccT) when daily temperature average is higher than 5 degrees C, but increased with increasing climatic moisture index (CMI), which was demined as the ratio of growing season precipitation (GSP) to AccT. We also found that PUE increased with increasing SR, the Shannon diversity index, FGC and LAIc, decreased with increasing foliar delta C-13, and had no relation with SLAc at the regional scale. Neither soil total nitrogen (STN) nor organic carbon has no influence on PUE at the regional scale. The community assembly of the Shannon index, LAIc and SLAc together accounted for 46.3% of variance in PUE, whilst CMI accounted for 47.9% of variance in PUE at the regional scale. This implies that community structural properties and plant functional traits can mediate the sensitivity of alpine grassland productivity in response to climate change. Thus, a long-term observation on community structural and functional changes is recommended for better understanding the response of alpine ecosystems to regional climate change on the Tibetan Plateau.
SubtypeJournal
KeywordLeaf functional traits Community species assembly Carbon isotope composition Rain use efficiency Tibetan alpine grasslands Regional precipitation gradients
Subject AreaScience & Technology - Other Topics
WOS Subject ExtendedMultidisciplinary Sciences
WOS KeywordWATER-USE EFFICIENCY ; RAIN-USE EFFICIENCY ; DIVERSITY-PRODUCTIVITY RELATIONSHIP ; CARBON-ISOTOPE DISCRIMINATION ; PLANT-SPECIES RICHNESS ; ABOVEGROUND BIOMASS ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; TEMPERATE GRASSLAND ; TEMPORAL VARIATION
Indexed BySCI
Language英语
WOS IDWOS:000387171900007
PublisherPEERJ INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44158
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Li, SW,Wu, JS. Community assembly and functional leaf traits mediate precipitation use efficiency of alpine grasslands along environmental gradients on the Tibetan Plateau[J]. PEERJ,2016,4:-.
APA Li, SW,&Wu, JS.(2016).Community assembly and functional leaf traits mediate precipitation use efficiency of alpine grasslands along environmental gradients on the Tibetan Plateau.PEERJ,4,-.
MLA Li, SW,et al."Community assembly and functional leaf traits mediate precipitation use efficiency of alpine grasslands along environmental gradients on the Tibetan Plateau".PEERJ 4(2016):-.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, SW]'s Articles
[Wu, JS]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, SW]'s Articles
[Wu, JS]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, SW]'s Articles
[Wu, JS]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.