森林-草原交错带天然次生林夏季鸟类群落多样性研究

为研究内蒙古高原东南缘森林-草原交错带不同林型鸟类群落特征,2005—2006年夏季对其天然次生林夏季鸟类进行了调查研究,共记录鸟类8目17科36种,天然次生林鸟类占该地区夏季鸟类总数的49.32%。其中,鸟类优势种为沼泽山雀(Parus palustris hellmayri),常见种为山斑鸠(Streptopelia orientalis orientalis)、小嘴乌鸦(Corvus corone orientalis)和黄眉柳莺(Phylloscopus inornatus inornatus),天然阔叶林有鸟类24种,天然混交林有鸟类27种,天然混交林具有最大的鸟种数、密度和多样性指数。天然阔叶林和天然混交林鸟类群落具有较高的相似性,有4种鸟类的密度在两种林型间差异显著(P<0.05)。结果表明:天然次生林对丰富交错带鸟类群落具有重要作用,建议保护天然次生林,以促进该地区生物多样性保存和健康发展。

The summer birds diversity of natural forest in forest-grassland ecotone

In order to study the features of bird community in different forest types of forest-grassland ecotone of Inner Mongolia plateau southeast edge,the summer birds of natural forest were investigated in 2005—2006.Total of 36 species were recorded,which belong to 17 families,8 orders and 49.32% of the total birds in summer.The dominant species were Parus palustris hellmayri,the common species were Streptopelia orientalis orientalis,Corvus corone orientalis and Phylloscopus inornatus inornatus.There were 24 species of birds in natural dediduous forest and 27 species in natural mixed forest.The natural mixed forest had the greatest number of bird species,density and diversity index.The similarity was high between natural dediduous forest and natural mixed forest.The densities of 4 species of birds were significantly different(P<0.05)between the two types of forests.The results showed that the natural forest played an important role to increase the bird community.And the protection for the natural forest is encouraged in order to promote biodiversity conservation and the healthy development in the region.