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Distribution patterns and traits of weed communities along an urban-rural gradient under rapid urbanization in Shanghai, China

文献类型： 外文期刊

作者： Tian, Zhihui 1 ; Song, Kun 1 ; Da, Liangjun 1 ;

作者机构： 1.E China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China

2.E China Normal Univ, Shanghai Key Lab Ecol Urbanizat Proc & Ecorestora, Shanghai 200241, Peoples R China

3.Shanghai Acad Agr Sci, Inst Ecoenvironm & Plant Protect, Shanghai, Peoples R China

关键词： diversity pattern;growth form;life form;weed management;weed types

期刊名称：WEED BIOLOGY AND MANAGEMENT （ 影响因子：1.059； 五年影响因子：1.276 ）

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收录情况： SCI

摘要： In order to better understand the effects of urbanization on weed communities, the distribution of weed communities in Shanghai, China, was systematically investigated. The diversity of weed communities and four environmental factors, including the relative light intensity, soil moisture, soil compaction and soil pH, were measured in 1375 plots along an urban-rural gradient. The species diversity indices in each area along the urban-rural gradient were compared by using a one-way ANOVA. The weed communities were identified by using clustering methods that were based on relative dominance information. A canonical correspondence analysis was used to reveal the relationships between the species composition and the environmental factors at the community level and the Spearman's rank correlation test was used to test the relationship between the number of weed communities and each environmental factor. A total of 183 species, belonging to 41 families and 123 genera, was recorded. It was found that the species richness, Shannon-Wiener diversity index and Pielou evenness index followed a unimodal curve along the urban-rural gradient. The 1375 plots were divided into 133 weed community types. All four environmental factors significantly affected the species composition of the weed communities, but only soil compaction had significant effects on the number of weed communities. It was concluded that the diversification of habitat type and environmental change along the urban-rural gradient led to more weed communities in rural areas and fewer weed communities in urban areas. Based on the species' habitats and distribution patterns, the weeds were divided into widespread, urban and rural.

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