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调查了北京密云县李各庄和小漕村荒草地90个2m×2m草本优势型样方的刺萼龙葵入侵地,分析了样方中各种植物的种类组成和区系特点以及种群的多度、频度和重要值,并结合其生长型、生态优势和竞争关系,评估了北京外来入侵植物刺萼龙葵的生态状况和生态危害风险。结果表明:在多度方面,刺萼龙葵在李各庄群落(共29种植物)中位列第3,在小漕村群落(共51种植物)中位列第5;在频度方面,刺萼龙葵在李各庄群落和小漕村群落中都位列第1;重要值数据表明,刺萼龙葵在李各庄群落和小漕村群落中的综合适应力均最大。综合分析可知,刺萼龙葵在北京的入侵生长尚处于局部危害阶段,但在其范围内已经突破生长瓶颈,成为优势种,同时禾本科、菊科和桑科的一些物种在抗衡刺萼龙葵的进一步扩展上具有一定的潜力。在生态干预策略上,可立足于若干具一定优势的本地物种,在刺萼龙葵发展到单优势种之前对其实行生态更替和铲除。
In this study, we investigated the invasive sites of 90 2m × 2m herbaceous dominant quadrats in Ligezhuang and Xiaocao village of Miyun County in Beijing. Species composition, fauna and flora of various plants in the quadrat were analyzed Degree, frequency and important value of the alien invasive alien Solanum lycopersicum in Beijing, combined with its growth pattern, ecological superiority and competition, the ecological status and ecological risk of alien invasive allantraceae in Beijing were evaluated. The results showed that in the aspect of abundance, Calyx japonica ranked third in Ligezhuang community (29 species in total), fifth in Xiaocao village (51 species in total), and in terms of frequency , Calyx japonica was ranked No. 1 in Ligezhuang community and Xiaocao village community. The important value data showed that the comprehensive adaptability of Solanum glaucum in Ligezhuang community and Xiaocao village was the highest. According to the comprehensive analysis, the invasive growth of Solanum glaucum in Beijing is still in the stage of partial damage, but within its scope, the growth bottleneck has been crossed to become the dominant species. Meanwhile, some species of Gramineae, The further expansion of the sun has some potential. In the strategy of ecological intervention, we can base ourselves on a number of local species with certain advantages to conduct ecological replacement and eradication before they develop into dominant species.