水土保持研究2018，Vol.25Issue(2)：162-169,8.
干旱风沙区立地条件、季节变化对柠条灌丛“虫岛”效应的影响
Comparison of ‘ Arthropod Island’ Acted by Caragana Shrub Canopy Under Different Microsite Conditions Across Seasonal Changes in Desertified Region
摘要
Abstract
In order to probe into the spatiotemporal effect of shrub canopy on the distribution of soil faunal community diversity,a field investigation on ground-active arthropod by the pitfall trapping method was undertaken between Caragana Shrub microhabitats under different microsite conditions in desertified region in spring,summer and autumn.The relative interaction intensity (RⅡ) was used to examine the ‘arthropod island’ acted by shrub canopy under two microsite conditions with/without sand cover across seasonal changes.It was found that:(1) the Sorenson index between two microsite conditions increased across seasonal changes;Tenebrionidae was the dominant group which was not affected by the microsite conditions and seasonality;along with microsite condition and seasonal changes,the similar and/or reversing distribution of ‘arthropod island’ acted by shrub canopy was found in the ground-active arthropods;(2) it was found that there was significantly (p＜0.05) greater R Ⅱ value regarding Carabidae in the microsite without sand cover relative to that with sand cover only in summer season;whereas the R Ⅱ values regarding Tenebrionidae and Formicidae were found to follow a reverse pattern between microsite conditions across seasonal changes;(3) it was found that the R Ⅱ value regarding total abundance was significantlygreater in the microsite without sand cover relative to that with sand cover only in summer (p＜0.05),whereas it was followed a reverse pattern between the spring and autumn seasons;it was found that the RⅡ values regarding group richness in each microsite conditions were regulated by the seasonal changes;however,the R Ⅱ values regarding group richness were found to be little affected by the microsite conditions and seasonal changes.It was conclude that the ‘arthropod island’ regarding arthropod abundances was remarkably affected by the microsite conditions and seasonality.The ‘arthropod island ’ regarding group richness was much affected by the seasonality and little by microsite conditions.It was suggested that the shrub canopy facilitated the ground-active diversity irrespective of both microsite conditions and seasonality in desertified region.关键词
“虫岛”/灌丛/干旱风沙区/立地条件/季节变化Key words
arthropod island/shrub canopy/arid aeolian sand region/microsite condition/seasonal change分类
生物科学引用本文复制引用
郗伟华,刘任涛,刘佳楠,赵娟,常海涛,罗雅曦,张静,马继..干旱风沙区立地条件、季节变化对柠条灌丛“虫岛”效应的影响[J].水土保持研究,2018,25(2):162-169,8.基金项目
宁夏自然科学基金“路域建设对脆弱荒漠草原生物多样性的影响及生态效应评价”(NZ15025) （NZ15025）
