外来广聚萤叶甲在我国大陆潜在分布区的预测

A Prediction of Potential Distribution of Ophraella communa(LeSage)(Coleoptera: Chrysomelidae) in China's Mainland

豚草是传入我国的恶性外来入侵杂草,广聚萤叶甲(Ophraella communaLeSage)是新近发现、专食豚草的潜在有效天敌。为预测广聚萤叶甲的潜在分布范围,利用CLIMEX软件对该叶甲与豚草及其近缘植物三裂叶豚草、向日葵等潜在寄主植物的适生区进行了分析和预测;采用由生态气候指数(EI)衍生的生物-气候风险指数(BCRI),分别分析了该叶甲与这3种植物同域分布的范围。广聚萤叶甲在我国大陆的潜在分布区向北可以分布到沈阳,向南可能分布到海南;而华东、华南和西南东部地区是其适宜的分布区域。广聚萤叶甲与豚草在我国北部的共同适宜边际区到达山东济南,与三裂叶豚草和向日葵的北部边际区达到辽宁沈阳,而该叶甲与这3种植物的共同适宜区主要分布在华东、华南和西南东部等地。我国北方种植的向日葵受广聚萤叶甲取食危害的风险很低。

Ophraella communa LeSage （ Coleoptera ： Chrysomelidae） is an exotic herbivorous specialist on the ragweed, Ambrosia artemisiifolia （Compositae）, an exotic invasive weed in China's Mainland. Potential habitats of the leafbeetle were assessed in relation to its host A. artemisiifolia, and potential host plants, A. trifida and Helianthus annum in China's Mainland using the CLIMEX software. The Bioclimatic Risk Index （BCRI）, derived from the Ecoclimate Index （EI） in output of the CLIMEX analysis, was used to measure the probability of overlapping distribution between the leafbeetle and host plant. The results show that O. communa has the potential to establish at locations from Shenyang, Liaoning Province in the north, through to Hainan Province in the south of China, and east China, south China, and the east in southwest China are potentially suitable areas for its establishment. Suitable areas shared by O. communa and A. artemisiifolia border to the north at Jinan, Shandong Province, while those shared by O. communa and A. trifida and H. annuus border to the north at Shenyang, Liaoning Province. Suitable areas shared by the leafbeetle and all the three plant species lie in east and south China, and the eastern part in southwest China. Sunflower crop in north China is at low risk of feeding damage by O. communa .