西藏食蚜蝇科昆虫地理分布与区系分析

Geographical Distribution and Analysis on Fauna of Syrphidae in Tibet

【目的】食蚜蝇是重要的天敌昆虫和访花昆虫,西藏地区拥有丰富的生物多样性,且具有特殊的地理位置和人文环境。本文探明了西藏食蚜蝇科昆虫物种多样性及其地理分布与区系特性。为天敌昆虫利用和生物多样性保护提供基础资料。【方法】以物种调查和整理文献记录获得物种资源数据。结合研究资料,依据世界动物地理区划及中国动物地理区划,研究了西藏地区的食蚜蝇科昆虫的地理分布。通过对已知种类进行地理分布和区系特性分析,获得西藏食蚜蝇昆虫种类、地理分布和区系特性数据。【结果】西藏食蚜蝇科昆虫117种,分别隶属于3亚科16族43属。其区系组成是:东洋区成分39种,占已知总数的33.3%,古北区成分20种,占已知总数的17.1%,广布种58种,占总数的49.6%。青藏亚区与华北亚区共有种39种,占已知总数的33.33%;与西南亚区共有种38种,占统计总数的32.5%,与蒙新亚区和华中亚区共有种都是30种,占统计总数的25.6%。【结论】西藏已知食蚜蝇科昆虫区系组成以广布种为主,其次为东洋区成分,古北区成分最少。在中国各动物地理亚区中,青藏亚区和华北亚区的共有种类最多。

【Objective】The syrphid flies are a group of important natural enemy insect and insect pollination.This paper aimed to explore the diversity,geographical distribution and faunistic characteristics of Syrphidae in Tibet.Using natural enemy insects and protecting the biodiversity is dedicated to provide you with basic information.【Method】Tibet region was rich in biodiversity and had a special geographical Ioca-tion and human environment.Species data were obtained through field survey and document literature.Combined with the research data,the geographical distribution of the family Syrphidae in Tibet was studied on the basis of the world animal geographical division and China animal geographical division.By geographical distribution and faunistic analyzing,the data of species,geographical distribution and faunistic characteristics was obtained.【Result】There were 117 species of Syrphidae in Tibet,belonging to 3 subfamilies,16 families and 43 genera.The faunistic composition was just like following:39 species in oriental region,accounting for 33.3%of the total;20 species in the Palaearctic region,accounting for 17.I%;and 58 species were cosmopolitan species,accounting for 49.6%.There were 39 species in Qinghai-Tibet subregion and North China subregion,accounting for 33.33%.There were 38 species in Qinghai-Tibet subregion and Northwest subregion,accounting for 32.5%.There were 30 species in Qinghai-Tibet subregion and Inner Mongolia-Xinjiang region,accounting for 25.6%,which was the same number in Qinghai-Tibet region and central China.【Conclusion】The faunistic of Syrphidae dominated by the widespread species,followed by the oriental ones,and then Palaearctic ones.Among the zoogeographic subregions in China,the species in Qinghai-Tibet region and North China region shared the most species.