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Structure of the microbial biomass and trophic groups of nematodes in soddy-podzolic soils of a postagrogenic succession in the southern taiga (Tver oblast)

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Abstract

The structure of the microbial biomass and trophic nematode groups were studied in soddy-podzolic soils under phytocenoses of a secondary succession initiated by the growth of forests on agricultural lands in the southern taiga. The microbial biomass became greater with the increasing amount of fungal mycelium, and the bacterial pool little changed in these soils. Bacteriovorous nematodes predominated (64% of the total number of nematodes) in the soils of a potato field, where the bacterial biomass was maximal; it was greater or close to the fungal biomass. In the soil under a mown meadow, where the fungal biomass was greater, the populations of fungivorous and bacteriovorous nematodes were close in number and share in the nematode complex (by 40%). In the soil under a spruce forest (climax stage), the main biomass pool was composed of fungi (97%), whose biomass is maximal, while fungivorous nematodes and nematodes with a mixed type of feeding occupy the dominant positions (69% in the nematode complex). In the course of the succession, the number of fungivorous and bacteriovorous nematodes decreased, but their ratio increased from 0.4 in the soil of the potato field to 0.8–1.0 under the meadows and mixed forest and to 2.0 in the soil under the sorrel spruce forest. These changes corresponded to the increasing microbial pool and the share of the fungal biomass in it.

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Authors and Affiliations

  1. Skryabin All-Russian Research Institute of Helminthology, ul. Bol’shaya Cheremushkinskaya 28, Moscow, 117218, Russia

    V. D. Migunova

  2. Faculty of Biology, Moscow State University, Leninskie gory 1, Moscow, 119991, Russia

    A. V. Kurakov

Authors
  1. V. D. Migunova
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  2. A. V. Kurakov
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Correspondence to V. D. Migunova.

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Original Russian Text © V.D. Migunova, A.V. Kurakov, 2014, published in Pochvovedenie, 2014, No. 5, pp. 584–589.

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Migunova, V.D., Kurakov, A.V. Structure of the microbial biomass and trophic groups of nematodes in soddy-podzolic soils of a postagrogenic succession in the southern taiga (Tver oblast). Eurasian Soil Sc. 47, 453–458 (2014). https://doi.org/10.1134/S1064229314050160

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