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Biotic Homogenization Caused by the Invasion of Solidago canadensis in China

Journal of Integrative Agriculture 2013年第5期12卷 835-845页

作者： CHEN Guo-qi ZHANG Chao-bin MA Ling QIANG Sheng john asilander Li Li Qi Weed Research Laboratory Nanjing Agricultural University Department of Ecology and Evolutionary Biology University of Connecticut Northern Crop Science Laboratory USDA-ARS

Although studies argue that invasive species can cause biotic differentiation, some cases show that biological invasions actually decrease biodiversity through biotic homogenization. The concept of biotic homogenization through the invasion of a certain serious invasive plant species merit more studies. Hence, we used field surveys to quantitatively compare invasive populations of Solidago canadensis （SC） in China with the control sites （adjacent sites to SC present sites yet without the species） and SC native populations in the USA. We found that plant communities in SC invaded habitats shared similarities with those in SC native ranges. Bray-Curtis similarity clearly showed that the composition of plant communities in SC invaded habitats were similar to those in SC native ranges. Both in the native and introduced range, plant communities with SC present were characterized by SC being dominant, significantly lower species richness, or-diversity and p-diversity, as well as a decrease in the correlation coefficient between geographic distance and floristic similarities. SC favors fertile and moist loam habitat, while it dominated in various habitats in China, where more than 20 different dominants should have occurred. In conclusion, serious invasive species can quickly remodel and homogenize diverse communities by dominating them.

关键词： biodiversity control site field survey geographic distance invasive population native population similarity

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