敦煌北山及马鬃山地区植物群落β多样性及其解释

doi:10.13866/j.azr.2022.05.11

Abstract

Abstract:

β diversity reflects the different composition of species between communities and is prevalent topic in ecological research. Based on the community survey sites in Beishan and Manongshan areas of Dunhuang of Bray-Curtis index of 79 plants, this study analyzed the relationship between community and climatic factors, soil factors and geographical distance. The results showed a geographical decay pattern of plant communities in the Beishan and Manongshan areas of Dunhuang, and the β diversity was dominated by β_sim. The β diversity and its turnover components were significantly affected by climate, soil, and geographical distance. Multiple regression analysis (MRM) showed that climate, and soil factors and geographical distance affected β diversity and its turnover components differently, and the effects of climate and soil factors were more important than the geographical distance. These results indicated that β diversity of plant community species in the Beishan and Manongshan areas of Dunhuang resulted from habitat filtration and dispersal restriction. Species composition of communities differed greatly, and habitat filtration accounted for a large proportion of species turnover.

Key words: plant communities, β diversity, environmental filtration, diffusion restriction, climate, in Beishan and Manongshan of Dunhuang

LI Xing,XIN Zhiming,DONG Xue,LI Yonghua,DUAN Ruibing,MA Yuan,LI Xing,LI Kuan. β diversity and interpretation of plant communities in Beishan and Manongshan areas of Dunhuang[J].Arid Zone Research, 2022, 39(5): 1464-1472.

Figures/Tables 7

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序号	科	属		种
序号	科	数量/个	百分比/%	数量/个	百分比/%
1	藜科（Chenopodiaceae）	12	26.70	14	24.56
2	菊科（Asteraceae）	6	13.33	12	21.05
3	禾本科（Poaceae）	6	13.33	7	12.28
4	豆科（Fabaceae）	4	8.89	4	7.02
5	蒺藜科（Zygophyllaceae）	3	6.67	4	7.02
6	百合科（Liliaceae）	1	2.22	3	5.26
7	蓼科（Polygonaceae）	2	4.44	2	3.52
8	十字花科（Brassicaceae）	2	4.44	2	3.52
9	柽柳科（Tamaricaceae）	2	4.44	2	3.52
10	夹竹桃科（Apocynaceae）	1	2.22	1	1.75
11	景天科（Crassulaceae）	1	2.22	1	1.75
12	白花丹科（Plumbaginaceae）	1	2.22	1	1.75
13	麻黄科（Ephedraceae）	1	2.22	1	1.75
14	毛茛科（Ranunculaceae）	1	2.22	1	1.75
15	蔷薇科（Rosaceae）	1	2.22	1	1.75
16	石竹科（Caryophyllaceae）	1	2.22	1	1.75

影响因素	β多样性		更替
影响因素	R²	P	R²	P
气候因素	0.27	<0.001	0.19	<0.001
土壤因素	0.13	<0.001	0.15	<0.001
地理距离	0.03	<0.001	0.01	<0.001
气候因素×土壤因素	0.32	<0.001	0.26	<0.001
气候因素×地理距离	0.17	<0.001	0.10	<0.001
土壤因素×地理距离	0.16	<0.001	0.15	<0.001
气候因素×土壤因素×地理距离	0.33	<0.001	0.26	<0.001

β diversity and interpretation of plant communities in Beishan and Manongshan areas of Dunhuang

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