长白山阔叶红松林不同演替阶段地表甲虫组成和多样性(英文)

Composition and Diversity of Ground-dwelling Beetle (Coleoptera) Along a Succession Gradient in Broad-leaved and Korean Pine Mixed Forest in the Changbai Mountains, China

鞘翅目昆虫多样性的变化是森林演替过程的综合反映. 于2007年6-8月采用陷阱诱捕法对长白山阔叶红松林带不同演替阶段地表甲虫物种组成和数量进行了调查，并分析了该地区不同演替阶段地表甲虫多样性的变化趋势及主要生境因子对地表甲虫群落的影响. 结果显示，长白山阔叶红松林内共诱捕地表甲虫23种，共511头，隶属于10个科. 其中个体数最多的为埋葬甲科，物种数最多的为步甲科，优势类群为步甲科和埋葬甲科. 不同演替阶段中，次生白桦林地表甲虫物种数和个体数高于原始阔叶红松林和次生针阔混交林，3个生境内地表甲虫多样性无显著差别. 地表甲虫高峰期为7月份. 不同演替阶段的样地中物种统计数量都没有达到渐进线，次生白桦林样地中实际物种只占估计值的67%，其它2个生境实际物种数都在物种估计值的95%区间范围内，略低于平均值. 3个生境的地表甲虫种-多度曲线无显著差异，符合对数分布. 胸高断面积和土壤湿度对地表甲虫的分布有显著影响，它们可以解释99.2%的物种与环境之间的关系. 图5 表2

Some studies showed a mixed response of ground-dwelling beetle to forest regeneration and succession. In order to prove the change trend of beetle diversity following the gradient of succession and discuss the effect of environment factors on beetle community, a study of ground-dwelling beetle in three habitats along a succession gradient was carried out from June to August 2007 in the broad-leaved and Korean pine mixed forest in the Changbai Mountains, China using pitfall trapping. Total of 511 individuals and 23 species were identified. Carabidae and Silphidae were dominant families with maximum of species and individuals, respectively. The numbers of species and individuals in the secondary birch forest were greater than those in the secondary conifer and broad-leaved mixed forest and original broad-leaved and Korean pine forest. The investigation results suggested that the composition and diversity of ground-dwelling beetle was determined by succession stage. The beetle diversity in the secondary birch forest at the earlier succession stage was higher than that of climax forest community, but no significant differences in beetle diversity were showed among the three habitats. Highest numbers of beetle species and individuals were found in July. Species accumulation curves of all the three habitats did not reach an asymptote. The actual species richness values of the secondary conifer and broad-leaved mixed forest and original broad-leaved and Korean pine forest were both within the 95% confidence intervals, but that of the secondary birch forest was lower than the minimum estimated value. There were no significant differences in beetle species-abundance distributions among the three habitats and all of them fit the log series distribution. The result of DCA showed that the dominance species of all sites was similar and the difference among habitats was made by occasional species. According to analysis of RDA, the area of breast height and soil moisture were main environment factors affecting distribution of ground-dwelling beetle, which explained 99.2% of relationship between beetle and environment. Fig 5, Tab 2, Ref 36