Realm: Terrestrial
Climate: Temperate
Biome: Boreal forests/Taiga
Central latitude: 63.416670
Central longitude: 10.500000
Duration: 12 years, from 1960 to 1972

327 records

34 distinct species

Across the time series Prunella modularis is the most frequently occurring species

Methods

The density of the bird community was estimated by the territory mapping method mainly in accordance with the international recommendations (Anon 1970). The position of the individual singing males were plotted on a gridded census map and great care was taken in mapping simultaneously singing neighbours. In addition, other territorial behaviour such as courtship feeding, nest building behaviour and copulation was used to delimit the individual territories. Considerable time was spent in searching for nests. Mapping of colourringed individuals was also used to determine the number of territories involved. Each year 13 - 20 census visits were made of which about two thirds took place during the mornings. Each visit lasted about 5 to 5.5 hours and was started alternatively from the eastern and western parts of the area. the census work was coarried out from the last week of May to the end of June. Data were analysed using Mann-Whitney U-tests Spearman rank correlation (rn where the subscript n denotes df). All tests were two tailed. Unit of abundance = IndCountInt, Unit of biomass = NA

Citation(s)

Hogstad, O. (1993) Structure and dynamics of a passerine bird community in a spruce-dominated boreal forest. A 12-year study. Annales Zoologici Fennici, 30, 43-54.