数字农科院2.0

Effects of mowing frequency on abundance, genus diversity and community traits of soil nematodes in a meadow steppe in northeast China

文献类型： 外文期刊

作者： Pan, F. J.;Wang, C. L.;Li, C. J.;Hu, Y. F.;Jiang, Y.;Yang, L. Y.;Yang, L. Y.;Yan, R. R.;Cao, J.;Tan, H. Y.;Xin, X. P.

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关键词： Grassland; Vegetation; Biodiversity; Trophic group; Ecosystem function

期刊名称： PLANT AND SOIL

ISSN： 0032-079X

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页码：

收录情况： SCI

摘要： Aims Soil nematodes, as key bioindicators, play crucial roles in soil ecological process. Management of grasslands, such as meadow steppes in northeast China, is often done by mowing, which has an impact on soil nematode communities. However, few studies have explored effects of mowing frequency on the community structure and biomass of soil nematodes. Methods Routine field and laboratory methods concerning plant community, soil properties, and soil nematodes were applied in this study. Soil nematode community structure was analyzed by using nonmetric multidimensional scaling (NMDS) and principal component analysis (PCA). The relationships between nematode genus and biotic and abiotic factors were analyzed by redundancy analysis (RDA). Results High mowing frequency significantly reduced abundance, biomass, and functional or metabolic regimes of soil nematodes in this ecosystem, whereas moderate mowing frequency enhanced those indices and regimes. Conclusions Our findings showed that changing patterns in nematode indices across the mowing frequency conformed with the intermediate disturbance theory. Variations in soil nematode community were related to changes in belowground biomass, aboveground litter, soil available nitrogen and acidity, and the effects of edaphic and vegetal traits appeared to be trophic or genus-specific. This study has potential benefits for grassland restoration in northeast China.

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