Invasion Possibility and Potential Effects of Rhus typhina on Beijing Municipality

查看全文 作　　者：Guangmei [1,2]Wang;Gaoming [1]Jiang;Shunli [1]Yu;Yinghao [1,3]Li;Hui [1,3]Liu

机构地区：[1]State Key Laboratory of Vegetation Science and Environmental Changes, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China;[2]Yantai Institute of Coastal Zone Research for Sustainable Development, the Chinese Academy of Sciences, Yantai 264003, China;[3]Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Journal of Integrative Plant Biology》索引2008年第50卷第5期,共9页

基　　金：the Innovative Group Grant of the National Natural ScienceFoundation of China (30521002);Beijing Science and Technology Committee (H030630050490). 摘　　要：Rhus typhina,an alien species introduced from North America,was identified as a main afforestation species in Beijing municipality. However,its invasiveness is still at odds. To clarify this problem,we applied the North American Screening System and the Australian Screening System to preliminarily predict its invasion possibility. Both screening systems gave the same recommendation to 'reject'. The geographical distribution was surveyed,with the population features of R. typhina against the native plant communities being assessed. With anthropogenic assistance,R. typhina has been scattered on almost all habitats from downtown to mountains,including roadsides,farmlands and protected areas. As a clonal shrub,R. typhina possessed a high spreading rate,varying from 6.3m/3years at sterile habitats to 6.7m/3years at fertile ones. Significantly lower species richness,individual density and diversity were observed in the R. typhina community than those of the native Vitex negundo Linn.var. heterophylla (Franch.) Rehd. community at both sterile and fertile habitats. Continual wide plantation of R. typhina may further foster its population expansion,which helps the species to overcome spatial isolation. The fact that each root fragment can develop into a new individual makes R. typhina very difficult to be eradicated once established. From a biological point of view,we believe that R. typhina is a plant invader in Beijing. We therefore suggest the government should remove the name of R. typhina from the main tree species list in afforesting Beijing. 关键词：外来物种北京生态冲击外来生物入侵

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Invasion Possibility and Potential Effects of Rhus typhina on Beijing Municipality

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