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2 Polish Journal of Ecology

2 Olejniczak I.

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Communities of soil microarthropods with special reference to Collembola in midfield shelterbelts

Olejniczak I.

Polish Journal of Ecology

2004

Vol. 52, nr 2

123-133

Density of microarthropods, Collembola and Acarina were studied in 2000 in soil and litter of 7-years old shelterbelt and in nearby field sown by winter wheat in Turew (Wielkopolska Region, West Poland). Samples were taken in the shelterbelt centre and in the field at a distance of 0.5 m, 10m and 50 m from the tree line. Collembola were analysed in soil and in litter samples placed in containers and located in different sited, Acarina only in soil samples. Density of Collembola in soil was found to be higher in the shelterbelt than in the adjacent field (P=0.003). Similar relationship was not, however, noted for insects in litter, density in open field was higher than in the shelterbelt. Density of Acarina in soil decreased gradually with the distance from the shelterbelt (P=0.007). Twenty three species of springtails were found; the highest species richness (12) was noted in shelterbelts, but also in the litter in the open field. The dominant species common for soil and litter were Isotoma notabilis in the shelterbelt while Isotomina thermophila and Isotoma viridis in the field. With the increasing distance from shelterbelt Proisotoma minuta increased its contribution to the soil community, Entomobrya multifasiata was the dominant only in litter. In the field soil, 50 m from woods, the highest share of young individuals was noted. The highest species richness of Oribatida was found in the field margin (18). The Tectocepheus velatus was the dominant species both in the shelterbelt and the field, accounted for 30-70% of the total number of individuals.

Effect of simplification of grass cultures and soil conditions on Collembola (Apterygota) communities in a lysimetric experiment

Olejniczak I.

Polish Journal of Ecology

2000

Vol. 48, nr 3

209-224

In 1987-1989 a lysimetric experiment was designed to determine the effect of species composition of grass cultures (mono- and polyculture cultures) on Collembola communities, and to examine correlations between the abundance of Collembola and other soil organisms. Also the dependence of Collembola abundance on plant biomass was examined. Two plant communities were under study: simplified (Dactylis glomerata - monoculture) and comprising several species (a mixture of six grass species - polyculture). Plastic 0.16 m^2 lysimeters were used, filled with alluvial soil made up of coarse sand. The soil was watered and fertilized with earthworm casts. The simplification of the plant community had an unequivocal effect on the density and species diversity of collembolans. Watering and fertilization accounted for an increase in the density of collembolans only in the upper soil layer of the severalspecies plant community. Fertilization had a shortterm effect, noticeable within 30 days after the introduction of casts. Cryptopygus bipunctatus, a pioneer species, was the dominant, accounting for over 50% of the community in the upper soil layer and for 30% in the lower layer.