PRIRODOZNANSTVENA IZUČAVANJA OTOKA U SVJETLU TEORIJE BIOGEOGRAFIJE
SCIENTIFIC ISLAND RESEARCH BASED ON THE THEORY OF BIOGEOGRAPHY

Summary/Abstract: Damaging anthropogenic impact on fragile biotops makes islands the most endangered components of the planeta biodiversity. Specific island animal populations and associations and their exceptional vulnerability call for specific approach to the natural scientific island research and protection of island natural heritage. Due to local extinction and recolonization the number of species of nesting birds and other animal species on an island is never definite nor is their quantitative biocenosis structure. However, the total number of species on an island equilibrates due to the ratio between extinct and immigrated species which is stable in the long run. This is stated by the theory of island biogeography (or equi- Iibrium theory of island zoogeography). The theory is confirmed by the data on qualitative structure of ornithofauna (in particular nesting birds) on the Adriatic islands.

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