关键词: 翼手目, 秦岭和大巴山区, 动物地理, 分界线

Abstract:

There have been different ideas over whether or not the Qinling and Daba mountain ranges are part of the dividing line in Central China between the Palaearctic realm and the Oriental realm in the zoogeographical distribution of animals. Our predecessors have tried to prove this hypothesis from the perspectives of different disciplines by conducting surveys of birds, fishes, amphibians, reptiles and some mammals. The authors have carried out 3 major collections of bat (CHIROPTERA) specimens in the Qinling and Daba mountain ranges since 1964. Over 2 000 obtained specimens were identified and classified as 32 species belonging to 4 families and 4 subfamilies. The analytical results indicate that 23 species belong to the Oriental realm, accounting for 71.8% of the total, and 9 belong to the Palaearctic realm, accounting for 28.2% . These species are all seen in every Chinese zoogeographic region and their frequencies range as follows: Central China region, Southwest China region, South China region, North China region, Inner Mongolia-Xinjiang region, and Qinghai-Xizang region. Some of China’s endemic genera and species, including monotypic ones, also are distributed in the Qinling and Daba mountain ranges. The authors believe that bats are a class affected by climate, topography, and vegetation, and their geographic distribution is relatively sensitive and therefore restricted. According to the regional composition and distribution characteristics of bats in the Qinling and Daba ranges, the Oriental realm is limited to the northern slopes of Qinling range while the Palaearctic realm gradually declines in number from the southern slopes of Qinling range to the northern slopes of Daba range. There is a gradual transition for bats between the two realms in the southern slopes of the Qinling range and the northern slopes of Daba range,demonstrating that this is a transitional region for bats. All this further proves that the view is correct to consider the Qinling range within Central China region and that the Qinling range is the dividing line between the two realms in central China.

Key words: CHIROPTERA, Dividing line, Qinling and Daba mountain range, Zoogeography