重庆市主城区不同生境类型的蝴蝶多样性

Butterfly diversity in different types of habitat in Chongqing urban area

2006年9—11月,选取重庆主城区人工次生林、溪流沿岸农田、山地农田、天然次生林和人工园林等5种不同的生境类型,进行蝴蝶调查。共采集蝴蝶529只,隶属于6科16属20种。研究区优势种蝶类为酢浆灰蝶(Pseudozizeeria maha)(相对多度为38.75%)和菜粉蝶(Pierisrapae)(相对多度为17.01%)。5种生境类型的多样性指数变化趋势为天然次生林>溪流沿岸农田>山地农田>人工次生林>人工园林。同时分析了人为干扰和生境类型与蝴蝶多样性的关系。结果表明,人为干扰对蝴蝶多样性的负面影响尤其严重,保留城区内残存的农田生境斑块对蝴蝶多样性的保护有积极的意义。

An investigation was made on the butterfly diversity in the artificial secondary forest, cropland along stream, mountain cropland, natural secondary forest, and artificial garden in Chongqing urban area from September to November 2006. A total of 529 individuals belonging to 6 families, 16 genera and 20 species were collected, among which, Psedozizeeria maha and Pieris rapae were the dominant species, with their relative dominance being 38.75% and 17.01%, respectively. The diversity indices of butterfly in the five type habitats ranked in order of natural secondary forest 〉 cropland along stream 〉 mountain cropland 〉 artificial secondary forest 〉 artificial garden. Compared with habitat type, human disturbance had more impact on the butterfly diversity. To reserve the remaining agricultural fields in urban area would have positive significance in the conservation of butterfly diversity.