生态学报2025，Vol.45Issue(6)：2723-2732,10.DOI:10.20103/j.stxb.202312082678
腾格里沙漠固沙植被区土壤质地对地面节肢动物功能群结构的影响
Effect of soil texture on functional group structure of ground-active arthropods in sand-fixing revegetated area of Tengger Desert
摘要
Abstract
Soil texture is a keystone of soil condition restoration for revegetated areas.The effects of soil texture on trophic structure of ground-active arthropods have implications for the recovery of trophic structure and food-web stability of revegetated areas.In the southeastern Tengger Desert,three treatment sites were setup based on soil texture including S(only sand soils),SS(sand and silt soil),and SSC(sand,silt and clay soil).The ground-active arthropods were examined using pitfall trapping method,and the functional groups were clarified based on their feeding traits.The objectives of the present study were to probe into the effects of soil texture on trophic structure and its diversity in revegetated areas.The results showed that:(1)The ground-active arthropods included four functional groups:predatory,herbivorous,omnivorous and saprovorous arthropods.On the basis of arthropod abundance,herbivorous and omnivorous arthropods dominated the present ground-active arthropod communities.(2)With the improvement of soil texture,the abundance of predatory arthropods decreased first and then increased,whereas the abundance of herbivorous arthropods increased first and then decreased,and the abundance of omnivorous arthropods showed an increasing trend.(3)The group richness of predatory,herbivorous and omnivorous arthropods and their Shannon-Wiener diversity index were found to be significantly greater in SSC than in SS and S.The group richness of predatory,herbivorous and omnivorous arthropods was found to increase by 0.70-3.95,0.45-1.23,and 0.50-1.33,respectively from S and SS to SSC.The Shannon-wiener diversity index of predatory,herbivorous and omnivorous arthropods was found to increase by 1.32-6.43,0.81-1.59,and 10 times more,respectively from S and SS to SSC.(4)From the results of structural equation modes(SEM),there were facilitative effects of soil texture on the diversity of functional groups along succession.The improvement of soil texture indicated not only a direct effect on the group richness of predator arthropods,and but also an indirect effect through the improvement of soil physical-chemical properties.With regard to the group richness of herbivorous arthropods,there was an indirect effects of soil texture through herbaceous performances;With regard to the group richness of omnivorous arthropods,there was an indirect effects of soil texture through soil physical-chemical properties.In conclusion,the improvement of soil properties and herbaceous performances under finer soil texture would enhance the diversity of functional groups including omnivorous and saprovorous arthropods in addition to predators and herbivorous arthropods in revegetated areas.Therefore,the diversity increase of trophic groups would be beneficial for lengthening the food chain within ground-active arthropods and thus the stability.Furthermore,there was predatory pressure on herbivorous arthropods by predators in the finest soil texture containing great soil clay plus silt;it was suggested that there were a reflective of bottom-up or top-down effects between functional groups of predators and herbivores within ground-active arthropod trophic structure.关键词
腾格里沙漠/土壤质地/地面节肢动物/功能群结构/固沙植被区Key words
Tengger Desert/soil texture/ground-active arthropods/trophic structure/revegetated area引用本文复制引用
杨敏,刘任涛,方进,郭志霞,赵璇,周磊..腾格里沙漠固沙植被区土壤质地对地面节肢动物功能群结构的影响[J].生态学报,2025,45(6):2723-2732,10.基金项目
国家自然科学基金项目(32360318) （32360318）
宁夏自然科学基金创新群体项目(2023AAC01002) （2023AAC01002）
干旱区生态水文宁夏科技创新团队项目(2021RXTDLX01) （2021RXTDLX01）
中央引导地方科技发展专项(2024FRD05049) （2024FRD05049）
