Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau
Qin, XJ; Sun, J; Wang, XD
2018
Source PublicationECOLOGICAL INDICATORS
ISSN1470-160X
Volume84Pages:507-514
AbstractSpecies diversity (SD) and total plant coverage (PC) are commonly used predictors of primary productivity (i.e., above ground biomass (ABG)). PC is a characteristic frequently used in remote sensing to assess land cover, land use, and vegetative condition, while species diversity serves as a measure of the existence and utilization of ecological niches. Both SD and PC are thought to be positively related to primary productivity, with SD further contributing to community stability. We investigate the effects of SD and PC on ABG under different mean annual precipitation (MAP) levels. The influences of SD and PC on community stability and biomass allocation were analyzed using redundancy analysis (RDA), correlation analysis (CA), and generalized linear models (GLM). Significantly positive relationships between precipitation and above-ground biomass, species diversity, and plant coverage occurred in the low rainfall gradient (100-400 mm/y) in the alpine steppes, while these relationships appeared in the high rainfall gradient (500-700 mm/y) in alpine meadow ecosystems. Second, we determined that plant coverage (r(2) = 0.88, P < 0.001) provided a better explanation for above-ground biomass than species diversity (r(2) = 0.67, P < 0.001). Moreover, we found that the relationships between SD and AGB and PC and AGB (r(2) = 0.52, P < 0.001, and r(2) = 0.85, P < 0.001, respectively) were more positive in the alpine steppes than in the alpine meadows (r(2) = 0.41, P < 0.001, and r(2) = 0.77, P < 0.001, respectively). Third, at the different precipitation gradients, especially at the 400-500 mm/y and > 600 mm/y ranges, the PC continued to increase, while SD decreased with increasing AGB. Moreover, SD was more sensitive to community stability and reproduction allocation than PC. Overall, plant coverage is better than species diversity in indicating the dynamics of above-ground biomass along a precipitation gradient.
SubtypeJournal
KeywordAbove-ground biomass Plant coverage Species diversity Community stability Precipitation gradient
Subject AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS Subject ExtendedBiodiversity Conservation ; Environmental Sciences
WOS KeywordNET PRIMARY PRODUCTIVITY ; GRASSLAND COMMUNITIES ; SEMIARID GRASSLAND ; VEGETATION COVER ; CLIMATE-CHANGE ; FUNCTIONAL DIVERSITY ; ALPINE GRASSLANDS ; RICHNESS PATTERNS ; CHINA ; SCALE
Indexed BySCI
Language英语
WOS IDWOS:000425828200052
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/43936
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
Qin, XJ,Sun, J,Wang, XD. Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau[J]. ECOLOGICAL INDICATORS,2018,84:507-514.
APA Qin, XJ,Sun, J,&Wang, XD.(2018).Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau.ECOLOGICAL INDICATORS,84,507-514.
MLA Qin, XJ,et al."Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau".ECOLOGICAL INDICATORS 84(2018):507-514.
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