摘要
选取陕西子午岭国家级自然保护区阔叶林—针叶林、农田—灌丛和草地—灌丛3种边缘地带为研究样地,在科级水平上探讨边缘效应对鞘翅目昆虫群落多样性的影响。共采集鞘翅目昆虫4935只,隶属于28科,其中步甲科、叶甲科和瓢虫科的个体数量分别占个体总数的44.19%、21.95%和13.66%,构成该地区鞘翅目昆虫的优势类群。3种边缘类型中鞘翅目昆虫的科多样性、丰富度和均匀度均沿边缘向相邻生境内部降低,EH′值均大于1,呈现边缘正效应。经多元回归分析表明,植被密度影响阔叶林—针叶林边缘鞘翅目昆虫群落的多样性和丰富度,植被密度和盖度影响整个群落鞘翅目昆虫的个体数量分布。以上结论可为陕西子午岭自然保护区鞘翅目昆虫生物多样性的保护和合理利用提供科学依据。
Three edge zones,broad-leaved-coniferous forest,farmland-shrub and grassland-shrub of Ziwuling National Nature Reserve in Shaanxi Province were selected as the sample plots,and the impact of the edge effect on the diversity of Coleopteran insect community was discussed at family level.A total of4935Coleopteran insects were collected,belonging to28families,among which the individual amount of Carabidae,Chrysomelidae and Coccinellidae accounted for44.19%,21.95%and13.66%of the total number of individuals respectively,which constituted the dominant group of Coleopteran insects in this area.The family diversity,richness and evenness of Coleopteran insects in the three edge types decreased from the edge to the adjacent habitats,with the EH′values greater than1,showing a positive edge effect.The multiple regression analysis showed that the vegetation density affected the diversity and richness of Coleopteran insect community in the broad-leaved-coniferous forest,and the vegetation density and coverage affected the individual population distribution of the entire Coleopteran insects community.The above conclusions provide scientific evidence for the conservation and rational utilization of the biodiversity of Coleopteran insects in Shaanxi Ziwuling National Nature Reserve.
作者
徐世才
王丽娟
XU Shicai;WANG Lijuan(College of Life Sciences, Yan’an University, Yan’an Shaanxi 716000, China)
出处
《生态科学》
CSCD
2017年第5期204-210,共7页
Ecological Science
基金
陕西省高水平大学建设专项资金项目"生态学"(2012SXTS03)
延安大学引导项目"陕北烟区烟粉虱的发生规律及其有机防控"(YD2015-11)
关键词
鞘翅目
群落多样性
边缘效应
Coleoptera
community diversity
edge effect
