不同立地条件柠条灌丛内外地面节肢动物群落结构分布特征  

Distribution of Terrestrial Arthropod Communities in and out-of Caragana Korshinskii Shrubberies under Different Site Conditions

作　　者：刘任涛[1,2] 郗伟华 赵娟[1] 刘佳楠[1] LIU Ren-tao;XI Wei-hua;ZHAO Juan;LIU Jia-nan(Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Ningxia University,College of Life Science,Shanxi Normal Universit)

机构地区：[1]宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,宁夏银川750021 [2]山西师范大学生命科学学院,山西临汾041004

出　　处：《干旱区研究》2018年第2期354-362,共9页Arid Zone Research

基　　金：宁夏自然科学基金项目(NZ15025)

摘　　要：以宁夏盐池沙地柠条（Caragana korshinskii）灌丛林地为研究对象,于2012年春、夏、秋季,利用陷阱诱捕法调查了有无流沙覆盖两种立地条件下灌丛内外微生境中地面节肢动物群落组成与多样性分布特征。结果表明：（1）灌丛内外地面节肢动物优势类群有鳃金龟科、拟步甲科和蚁科类群的个体数分布,在不同季节不同立地条件生境中均差异较大。（2）春季和秋季,相同立地条件中灌丛内外地面节肢动物个体数分布呈现出相似性,而不同立地条件间灌丛内外的分布则存在显著差异性（P〈0.05）。但是在夏季,两种立地条件间灌丛内外地面节肢动物个体数呈现出相反的分布规律。（3）地面节肢动物类群数和Shannon指数分布在夏季和秋季两种立地条件均表现为灌丛内外无显著差异性（P〉0.05）,而在春季不同立地条件灌丛内外类群数分布呈现出较大变化。不同季节两种立地条件对灌丛内外地面节肢动物优势度指数分布格局均影响较大。（4）随季节变化,灌丛内外地面节肢动物群落相似性指数在有流沙覆盖和无流沙覆盖的柠条林地呈现出相反变化趋势。（5）立地条件、灌丛微生境和季节变化不仅对地面节肢动物类群个体数产生深刻影响,而且影响到了地面节肢动物群落总个体数和优势度的时空分布。灌丛微生境对地面节肢动物多样性具有聚集作用,同时受到立地条件和季节的调控。In desertified region in Yanchi County,Ningxia,a field investigation on terrestrial arthropods was carried out by taking the pitfall trapping method in and out-of the Caragana Korshinskii shrubberies under different site conditions with and without mobile sand cover in spring,summer and autumn. It was found that：（1） There was a remarkably seasonal difference in the activity distribution of dominant groups including Melolonthidae,Tenebrionidae and Formicidae families between the two kinds of sites conditions;（2） In spring and autumn,there was a similar distribution of total abundance between the shrub microhabitats under the same site conditions,but a significantly（ P 〈0. 05） difference in total abundance between shrub microsites under the distinctive site conditions. In summer,there was a reverse distribution of total abundance between the shrub microhabitats under two kinds of site conditions;（3）In summer and autumn,there were no significant（ P 〉 0. 05） differences in group richness and Shannon index between the shrub microhabitats under both kinds of site conditions,but a significant（ P 〈 0. 05） different distribution of group richness between the shrub microhabitats from one kind of site conditions to another in spring. Likewise,the distribution of dominance index between the shrub microhabitats was found to be affected by the site conditions in each season;（4） The seasonal Sorenson index between the shrub microhabitats showed a reverse pattern between the two kinds of site conditions with and without mobile sand cover;（5） It was suggested that the individual distribution of taxonomical groups and related total abundance and dominance index was affected by the site conditions,shrub microhabitat and seasonal change. It was found that the shrub canopy facilitated the diversity of terrestrial arthropods.

关 键 词：立地条件 地面节肢动物 群落结构 灌丛 微生境 盐池 宁夏 

分 类 号：S718[农业科学—林学]