Effects of Prescribed Fire on Community Composition and Structure of Soil Nematodes
Fire is the most common disturbance in many biomes and can affect the soil properties and soil biotic communities in a number of ways.We established a field manipulation experiment to investigate the effects of prescribed fire on the soil parameters and nematode community characteristics(abundance,genus richness,community diversity and ecological indices)in an old-field grassland of North China.The results showed prescribed fire significantly increased soil nematode abundance and genus richness and such changes correlated with soil nutrient content,microbial biomass and soil pH.The abundance of trophic groups in soil nematode community were considerably modified in prescribed fire plots due to the increase in proportion of plant parasites and reduced number of fungivore.These results suggest that prescribed fire results in a more abundant and diverse nematode community in old filed ecosystem and meanwhile such effects are indirect,i.e.,by increase of soil resources availability and change of soil pH.
prescribed firesoil nematodessoil propertiesdown control
NETL
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万方数据
