云南拟步甲区系特征与分布格局

Owing to their high adaptability to heterogeneous habitats and strong differentiation among species, as well as highly complex topography of Yunnan, the darkling beetles in this area are unique, fecund and diverse, and have important ecological and economic value. However, the tenebrionid fauna in this area is still underestimated despite previous efforts conducted by many researchers locally and internationally. So far, there is still no systematic research on its species diversity and other theoretical issues, such as distribution patterns and the underlying evolutionary mechanisms. . Based on systematic and thorough field investigation and sample collection, as well as the data from the original manuscript, taxonomic and faunistic studies on the tenebrionid beetles in Yunnan will be carried out in this study. Using the modern methods and theories of biogeography, such as GIS methods, parsimony analysis of endemicity (PAE) and vicariance biogeography, this study will also analyzes faunal composition, distribution patterns, patterns of endemism and faunal evolution for tenebrionids in Yunnan based on precise species information and distributional data.. This research will strongly advance our understanding of tenebrionid species diversity and systematics. The results of this study will greatly enrich the data of insect fauna and animal geography in Yunnan, which are helpful for defining general biogeographical patterns in this region, and also provide the basic data for effective conservation and rational utilization of the biodiversity in Yunnan.

云南自然环境高度异质，生活于其间的拟步甲适应性特殊、分化强烈，物种丰富、多样且独特，颇具经济和生态价值。然而，至今缺乏对其物种本底的系统调查，其地理分布格局及区系演化等理论问题亦急需深入探究。. 本项目以云南拟步甲科昆虫为对象，拟进行更全面、深入、细致的资源本底调查，重点对其区系分类问题进行系统总结，建立较为完整的系统分类目录和地理分布信息数据库，进而应用GIS 方法、特有性简约性分析方法（PAE）及隔离分化等现代生物地理学的方法和理论对其区系组成、分布格局、特有性及区系演化等理论问题做出科学分析和阐述。. 本项目的实施对深化我国拟步甲区系分类研究和摸清该类昆虫家底具有重要意义，研究结果将丰富云南昆虫区系和动物地理学基础资料，有助于揭示该区一致性生物地理格局，同时也为生物多样性保护与资源利用提供科学依据。

云南自然环境高度异质，生活于其间的拟步甲适应性特殊、分化强烈，物种丰富、多样且独特，颇具经济和生态价值。然而，在本项目实施前缺乏对其物种本底的系统调查，其地理分布格局及区系演化等理论问题亦急需深入探究。. 本项目以云南拟步甲科昆虫为对象，首先对其区系分类问题进行系统总结，基于约2万件标本的鉴定结果，结合有关文献资料记载，将云南拟步甲分类目录更新为：6亚科31族123属509种（其中研究期间新增2族22属72种）。. 其次，基于物种分布信息数据库，应用生物地理学的方法和理论对其区系组成、分布格局、特有性及区系演化等理论问题进行科学分析，结果表明：①云南拟步甲区系具明显的热带亲缘，在世界动物地理区划中（除东洋界及古北界外）与非洲界特别是热带非洲及北非具有较密切的渊源关系；在东洋界内，与印度亚界有较近的亲缘关系；在中印亚界内，则与四川亲缘关系最近，其族、属均以热带成分占有绝对优势，区系成分以东洋种占主要地位（354种），占69.5%。②云南特有成分丰富，共206特有种，占总数的40.5%，有4个特有分布区：即滇南山地小区、南部横断山小区、中部横断山小区、滇东高原小区。③物种由南向北、由西向东种类均呈减少的态势，但在不同纬度带上有较大波动，分布显著地受云南独特的地貌分异所影响。此外，古北界（尤其是青藏高原）类群可沿高山向南延伸，典型的东洋界的类群，亦可沿峡谷向北延伸，呈垂直相混分布的状态。④现代云南拟步甲区系是以古近纪古热带区系为基础演化而来，但深受青藏高原隆升及第四纪冰川的强烈影响，其区系性质发生了深刻改变，带有明显的过渡性。. 总之，通过本项目的实施基本摸清了云南拟步甲的家底，它是我国拟步甲物种多样性最丰富的省区，为拟步甲区系分类研究积累了更翔实的本底调查资料，对深化我国拟步甲区系分类研究具有重要意义，研究结果丰富了云南昆虫区系和动物地理学基础资料，同时也为生物多样性保护与资源利用提供科学依据。