Contribution of bacterivorous nematodes to soil resistance and resilience under copper or heat stress
作者机构：Soil Ecology LabCollege of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China SRUCCrop and Soil Systems Research GroupWest Mains RoadEdinburghEH93JGUK Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilizationNanjing 210095China
出 版 物：《Soil Ecology Letters》 (土壤生态学快报（英文）)
年 卷 期：2020年第2卷第3期
页 面：220-229页
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：supported by the National Foundation of Sciences in China(No.41877056) China Agriculture Research System-Green Manure(No.CARS-22-G-10)
主 题：Stress Soil resistant Soil resilience Bacterivores Functional stability
摘 要：The functional performance of soil ecosystems following disturbance determines ecosystem stability,and although contributions of bacterivorous nematodes to soil ecosystems are recognized,their roles in functional stability have received little *** objective of this study was to evaluate the roles of bacterivorous nematodes in functional stability following *** a factorial laboratory experiment,soil microcosms were prepared with two levels of nematode abundance,either an enriched abundance of bacterivores(Nema soil)or background abundance of nematodes(CK soil),and three levels of stress,copper,heat,or an unstressed *** resistance and resilience of nematode abundance,as well as soil microbial function by determining decomposition of plant residues and microbial substrate utilization pattern using a BIOLOG microplate,were followed post *** relative changes of two dominant bacterivores,Acrobeloides and Protorhabditis,responded differently to *** resistance and resilience of Protorhabditis were greater than that of Acrobeloides to copper stress during the whole incubation period,while both bacterivores only showed higher resilience under heat stress at the end of *** enrichment of bacterivores had no significant effects on the soil microbial resistance but significantly increased its resilience to copper *** heat stress,the positive effect of bacterivores on soil resilience was only evident from 28 days to the end of *** differences in the responses of soil function to stress with or without bacterivores suggested that soil nematodes could be conducive to ecosystem stability,highlighting the soil fauna should be taken into account in soil sustainable management.
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