| Relationship between ecological stoichiometry and plant community diversity in the upper reaches of Tarim River,northwestern China |
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| 作者姓名： | ZHAO Jingjing GONG Lu CHEN Xin |
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| 作者单位： | College of Resources and Environment Science;Key Laboratory of Oasis Ecology |
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| 摘 要： | Changes in ecological stoichiometry reflect nitrogen(N),phosphorus(P)and both N and P limitations in a plant community,which in turn affect plant diversity of the community.However,the relationship between plant community diversity and ecological stoichiometry has not yet been fully researched in arid and semi-arid regions.Ecological stoichiometry and plant community diversity indices of eighteen communities in the upper reaches of Tarim River,northwestern China,were analyzed by multivariate analysis of variance in 2016.The correlation between ecological stoichiometry and plant community diversity was assessed by redundancy analysis(RDA).Results indicated that the Margalef index was significantly correlated with carbon(C)and P concentrations,the Simpson index and Shannon-Weaner index were significantly correlated with plant C concentration,and the Pielou index was significantly correlated with plant C and N concentrations.Moreover,C:N and C:P ratios had significant impacts on plant community diversity.Our results highlight the importance of ecological stoichiometry in driving plant community diversity in the upper reaches of Tarim River,northwestern China.
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| 关 键 词： | Margalef INDEX SIMPSON INDEX Shannon-Weaner INDEX REDUNDANCY analysis TARIM RIVER |
Relationship between ecological stoichiometry and plant community diversity in the upper reaches of Tarim River,northwestern China |
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| ZHAO Jingjing,GONG Lu,CHEN Xin.Relationship between ecological stoichiometry and plant community diversity in the upper reaches of Tarim River,northwestern China[J].Journal of Arid Land,2020,12(2):227-238. |
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| Authors: | ZHAO Jingjing |
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| Institution: | 1. College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China;2. Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi 830046, China |
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| Abstract: | Changes in ecological stoichiometry reflect nitrogen (N), phosphorus (P) and both N and P limitations in a plant community, which in turn affect plant diversity of the community. However, the relationship between plant community diversity and ecological stoichiometry has not yet been fully researched in arid and semi-arid regions. Ecological stoichiometry and plant community diversity indices of eighteen communities in the upper reaches of Tarim River, northwestern China, were analyzed by multivariate analysis of variance in 2016. The correlation between ecological stoichiometry and plant community diversity was assessed by redundancy analysis (RDA). Results indicated that the Margalef index was significantly correlated with carbon (C) and P concentrations, the Simpson index and Shannon-Weaner index were significantly correlated with plant C concentration, and the Pielou index was significantly correlated with plant C and N concentrations. Moreover, C:N and C:P ratios had significant impacts on plant community diversity. Our results highlight the importance of ecological stoichiometry in driving plant community diversity in the upper reaches of Tarim River, northwestern China. |
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| Keywords: | Margalef index Simpson index Shannon-Weaner index redundancy analysis Tarim River |
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