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Interactions between the moisture and activity of soil and the biomass of vegetation and invertebrates in non-grazed Siberian steppe (Russia)

Fischer Z., Pachowska M., Tomala K.

Polish Journal of Ecology

2010

Vol. 58, nr 3

525-531

Our aim was to test the correlations of the plant and invertebrate biomass and several soil characteristics on six sites in a nonmanaged and un-grazed Siberian steppe (Russia). The study was done in the Chakasja National Park, in the southern part of the Yenisei-Czulyn basin (54[degrees]38'N; 90[degrees]15'E). Soil was characterized by its water holding capacity (WHC), loss on ignition (LOI) and standardized soil respiration related to the dry mass of the soil (OCD). Correlations between these parameters were significant (R2 = 0.71 to 0.95, P <0.05 or 0.01), as was the relationship between plant biomass and soil activity (respiration).

Relationship between Cognetia sphagnetorum Vejd. (Oligochaeta, Enchytraeidae) and soil microorganisms : a microcosm experiment

Nowak E., Piotrowska-Seget Z.

Polish Journal of Ecology

2005

Vol. 53, nr 2

215-223

Changes in densities of microorganisms were analysed in Cognetia sphagnetorum Vejd. Cultures at normal and low numbers of microorganisms. Different abundance of microorganisms was achieved by using captan and oxytetracycline. During 14 weeks, the following variables were measured: total numbers of bacteria and fungi by plate method, the biomass of microorganisms by PLFA method, content of ions, and activity of acid and alkaline phosphatase and urease. Numbers of enchytraeids increased with numbers of fungi. The presence of animals reduced the activity of soil enzymes and the content of Cl, SO4, Na, Ca and Mg ions in soil leacheates. An increase in the content of N-NO3 and N-NH4 was not significant.