不同林分结构的马尾松林对昆虫多样性的影响——以湖南湘乡东台山自然保护区为例

Effects of Pinus massoniana Forests with Different Stand Structures on Insect Diversity——A Case Study of Hunan Xiangxiang Dongtaishan Nature Reserve

通过研究马尾松纯林和马尾松针阔混交林之间的林分空间结构、林中昆虫生物多样性,并分析二者之间的关联程度,得出以下结论:马尾松针阔混交林中的林木更趋向于中庸状态,且开敞度更高;马尾松针阔混交林中昆虫类群的物种丰富度、Simpson指数、Shannon-Wiener指数和Pielou指数均高于马尾松纯林,且5—8月的昆虫种类和数量比其他月份多;不同马尾松林分类型的林分空间结构指数和昆虫生物多样性关联程度基本相似,主要表现为:混交度>开敞度>大小比数。

By studying the stand space structure and insect biodiversity between the pure Pinus massoniana for⁃ests and the Pinus massoniana conifer⁃broadleaved mixed forests,and analyzing the degree of correlation be⁃tween the two,the following conclusions were drawn:Pinus massoniana conifer⁃broadleaved mixed forests ten⁃ded to be more moderate and more open.The number of insect species,Simpson index,Shannon⁃Wiener in⁃dex,and Pielou index in the mixed forests of Pinus massoniana were higher than those in the pure Pinus masso⁃niana forests,and the number and species diversity of insects were higher from May to August comparing other months.It was similar in different Pinus massoniana stand types,that the correlation degree between the spatial structure index and the insect biodiversity,mainly charactered as follows:mingling degree>opening degree>neighborhood comparison.