横断山区蚜虫区系的特异性与历史渊源

文章系统分析了横断山区蚜虫区系的特异性,主要表现在:区系成分的复杂性、古北与东洋成分的交融性、区系组成的特有性和物种分布的间断性.进一步结合地质历史事件对横断山区蚜虫区系的历史渊源及其特异性演化进行了初步讨论.根据蚜虫类分布特点,建议古北区和东洋区在横断山区的分界线南移至丽江一线;横断山区蚜虫和其他地区的间隔分布可能是由地质历史上板块运动和青藏高原的隆升及第四纪冰期-间冰期的循环往复造成的;横断山区蚜虫区系是一个复合区系,同其他动物地理区划如新北区、澳洲区、非洲区等的蚜虫区系都有密切的历史渊源,青藏高原和横断山区的隆起及第四纪冰期-间冰期的循环往复又使得本区蚜虫区系有着独特的演化历程,从而造成了本区蚜虫区系的特有性.

PARTICULARITY AND ORIGIN OF THE APHID FAUNA OF HENGDUAN MOUNTAINS REGION, CHINA

The particularity of the aphid fauna of Hengduan Moutains Region is discussed here. The particularity are as follows: complexity of fauna components, blend of Palaearctic and Oriental species, endemic of fauna components, discontinuity distribution of species. Besides, the origin and the evolvement of particularity of the aphid fauna are discussed mostly based on the geological events. Based on the distribution of aphids, it is suggested that the south boundary of the Palaearctic and Oriental Realms in the Heng- duan Mountains Region may be moved to Lijiang and Yulong Snow Moutains Reigon. The discontinuity distribution of some species might be related to some geological events, such as the division of Euro-America. It is concluded that the aphid fauna of Hengduan Moutains Region is a compound fauna, and is closely related to the other aphid faunas, such as the Australian and Ethiopian. Moreover, the aphid fauna of Hengduan Moutains Region may suffer a unique evolvement process due to the upheaval of Qinghai-Tibet Plateau and the to-and-fro of Quarternary glacial and interglacial.