STRUCTURE OF THE BREEDING BIRD ASSEMBLAGE OF A NATURAL BEECH-SPRUCE FOREST IN THE ŠÚTOVSKÁ DOLINA NATIONAL NATURE RESERVE, THE MALÁ FATRA MTS

Korňan M., Adamik P.: Structure of the breeding bird assemblage of a natural beech-spruce forest in the Sutovska dolina National Nature Reserve, the Mala Fatra Mts. Ekologia (Bratislava), Vol. 33, No. 2, p. 138–150, 2014. The structure of a breeding bird assemblage of a natural beech-spruce forest in the Sutovska dolina National Nature Reserve, the Mala Fatra Mts was studied in the period 2000−2002. A 20-ha forest interior study plot was established for bird censusing. Population abundances were estimated by a combined version of the mapping method from April to the beginning of July. Altogether, 49 breeders were recorded and the total mean breeding bird assemblage density of the beech-spruce forest was 54.23±8.60 pairs/10 ha (CV = 15.85%). One species were characterised as eudominant (≥10%): Fringilla coelebs; and five species as dominant (≥5%): Erithacus rubecula, Sylvia atricapilla, Parus ater, Regulus regulus and Certhia familiaris. The Shannon diversity index ( H') varied between 3.97 and 4.04 bites. The evenness index ( J') reached values between 0.74 and 0.79. Expected species diversity in random sample of 100 pairs calculated by rarefaction [E (S100 pairs)] was 21.02 ± 0.46 (SD) species derived as a mean value from the years 2000−2002. The mean rarefaction estimate on area [E (S 10 ha )] was 17.35 ± 1.31 species. Species richness compared to other studied mixed forest in Slovakia was one of the highest, yet the species diversity values belong among the lowest.