Plant community heterogeneity and its influencing factors in the Ulan Buh Desert

doi:10.7522/j.issn.1000-694X.2022.00037

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (5): 187-194.DOI: 10.7522/j.issn.1000-694X.2022.00037

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Plant community heterogeneity and its influencing factors in the Ulan Buh Desert

Xing Li¹^,²(), Yuan Ma¹^,², Xing Li¹^,²(), Junliang Gao¹^,², Zhiming Xin¹^,²(), Qi Lu¹^,³

^1.Experimental Center of Desert Forestry /, Chinese Academy of Forestry，Beijing 100091，China
^2.Inner Mongolia Dengkou Desert Ecosystem /, Chinese Academy of Forestry，Beijing 100091，China
^3.Institute of Desertification, Chinese Academy of Forestry，Beijing 100091，China

Received:2021-12-27 Revised:2022-03-11 Online:2022-09-20 Published:2022-09-22
Contact: Zhiming Xin

Abstract

Abstract:

β diversity reflects the heterogeneity of species composition in communities， and is a hot topic in ecological research. In this study， we investigated plant communities from 46 sites in Ulan Buh Desert and used S?rensen heterogeneity index to measure β diversity patterns. Principal component analysis （PCA）， Mantel and Partial Mantel tests were used to evaluate the effects of different environmental factors （including climate and soil） and community spatial distance on β diversity. The results showed that species composition differed greatly between ulan Bu and desert plant communities， and species turnover dominated the β diversity. Climate， soil and spatial distance had significant effects on β diversity and its turnover components， and the response of species turnover to β diversity was consistent with β diversity. The spatial alternation of plant species in Ulan Buh Desert is the result of the combined effects of environmental and dispersal limits， but the effects of environmental filtration on β diversity and composition exceed dispersal limits.

Key words: β diversity, environmental filtration, diffusion restriction, turnover, nested, Ulan Buh Desert

CLC Number:

Q948.1

Xing Li, Yuan Ma, Xing Li, Junliang Gao, Zhiming Xin, Qi Lu. Plant community heterogeneity and its influencing factors in the Ulan Buh Desert[J]. Journal of Desert Research, 2022, 42(5): 187-194.

Figures/Tables 4

References 47

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环境因子	主成分
环境因子	1	2	3	4
年均气温（MAT）	0.358	0.143	0.222	0.16
最暖月最高气温 (MTWM)	0.330	0.139	0.308	<0.1
最冷月最低气温(MTCM)	0.226	<0.1	-0.272	0.454
年降水量(MAP)	-0.413	<0.1	<0.1	0.114
最湿润月降水量 (PWM)	-0.406	<0.1	<0.1	0.109
最干旱月降水量 (PDM)	-0.151	<0.1	0.586	<0.1
最湿润季降水量(PWQ)	-0.412	<0.1	<0.1	0.123
最干旱季降水量(PDQ)	-0.181	<0.1	0.584	<0.1
全氮(STN)	<0.1	-0.365	<0.1	<0.1
全磷(STP)	0.164	-0.481	<0.1	<0.1
全钾(STK)	0.150	-0.219	<0.1	-0.66
有机质(SOM)	<0.1	-0.555	<0.1	<0.1
速效磷(SAP)	0.149	-0.231	<0.1	0.444
速效钾(SAK)	<0.1	-0.399	<0.1	0.244
海拔	-0.263	-0.149	-0.277	-0.152
特征值	5.37	2.60	2.19	1.17
贡献率/%	35.8	17.3	14.6	7.8
累积贡献率/%	35.8	53.1	66.7	75.5

环境因子	主成分
环境因子	1	2	3	4
年均气温（MAT）	0.358	0.143	0.222	0.16
最暖月最高气温 (MTWM)	0.330	0.139	0.308	<0.1
最冷月最低气温(MTCM)	0.226	<0.1	-0.272	0.454
年降水量(MAP)	-0.413	<0.1	<0.1	0.114
最湿润月降水量 (PWM)	-0.406	<0.1	<0.1	0.109
最干旱月降水量 (PDM)	-0.151	<0.1	0.586	<0.1
最湿润季降水量(PWQ)	-0.412	<0.1	<0.1	0.123
最干旱季降水量(PDQ)	-0.181	<0.1	0.584	<0.1
全氮(STN)	<0.1	-0.365	<0.1	<0.1
全磷(STP)	0.164	-0.481	<0.1	<0.1
全钾(STK)	0.150	-0.219	<0.1	-0.66
有机质(SOM)	<0.1	-0.555	<0.1	<0.1
速效磷(SAP)	0.149	-0.231	<0.1	0.444
速效钾(SAK)	<0.1	-0.399	<0.1	0.244
海拔	-0.263	-0.149	-0.277	-0.152
特征值	5.37	2.60	2.19	1.17
贡献率/%	35.8	17.3	14.6	7.8
累积贡献率/%	35.8	53.1	66.7	75.5

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Plant community heterogeneity and its influencing factors in the Ulan Buh Desert

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