Changes in Species Diversity of Rove Beetles (Coleoptera,Staphylinidae) Depending on the Age of Pine Plantations in Central Belarus

Trends of changes in species richness and dominance in staphylinid communities depending on the age of pine plantations have been analyzed. The species richness of these communities is high in the plantations of age classes 1 and 2 (11 and 28 years, respectively) but decreases in the plantations of age class 3 (60 years). The highest and lowest indices of species diversity are observed in the plantations of age classes 2 and 3, respectively. Four groups of rove beetles have been distinguished by the criterion of their dominance in pine plantations of different ages.__________Translated from Ekologiya, No. 4, 2005, pp. 306–313.Original Russian Text Copyright © 2005 by Derunkov.     

Caddis flies (Trichoptera) in the benthos and food of fish from streams of the Pechora-Ilych State Biosphere Reserve, the northern Urals

Data on the numbers and biomass of caddis fly species (Trichoptera) in the benthos and in the diets of fish from streams of the Pechora-Ilych State Reserve (the northern Urals) are provided. In the diets of grayling and juvenile Atlantic salmon caught in the rivers of the reserve, 17 and 10 species of caddis flies have been identified. As a rule, one to three species (in most cases, two species) prevail in the diet of fish.     

Changes in the Species Composition of Parasites in European Perch, <Emphasis Type=Italic>Perca fluviatilis</Emphasis>, in Lake Gusinoye (Lake Baikal Basin) during Depression and Subsequent Recovery of Host Abundance

Changes in the species composition of parasite fauna in the European perch in Lake Gusinoye (the Lake Baikal basin) were analyzed in the periods before and during depression of host abundance (the early and late 1970s) and in the years of its recovery to a stable level (the mid-2010s). The period of depression was associated with a significant decrease in the species richness of parasite fauna. Subsequent recovery of perch abundance to a stable level resulted in an increase in the parasite species richness, but it remained lower than before the depression of host abundance.