Response of Meso and Micro-Soil Fauna to Nitrogen Deposition in an Evergreen Broad-Leaved Forest in the Rainy Area of Western China
[Objective]Mastering the impact of nitrogen deposition on soil fauna community characteris-tics,providing data support for the sustainable development of subtropical evergreen broad-leaved forests.[Method]From January 2014,a simulated nitrogen deposition experiment was conducted in an evergreen broad-leaved forest in the Rainy Area of Western China.Three nitrogen levels(control(0 g/(m2·a)),low nitrogen(5 g/(m2·a))and high nitrogen(15 g/(m2·a))were set.To study the charac-teristics of soil fauna community,we isolated and identified the meso and micro-fauna by using a dry fun-nel method.[Result]The results showed that 8 390 meso and micro-fauna were captured during the study period,belonging to 2 phylums,5 classes,8 orders and 40 families.The dominant groups were Iso-tomidae,accounting for 31.05%of the total density of soil fauna.The vertical distribution of soil fauna community showed obvious characteristics of surface clustering.There were no significant changes in the diversity characteristics.The functional groups of soil fauna were mainly microorganism-feeding,scav-enging and predatory soil fauna.[Conclusion]Simulated N deposition decreased the average density of soil fauna,while promoted the number of soil fauna groups.The increasing nitrogen deposition is not con-ducive to the survival and development of meso and micro-fauna.
Rainy Area of Western Chinaevergreen broad-leaf forestsimulated nitrogen depositionmeso and micro-soil faunaresponse
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