Benthic Ecology

(Analysis of species-habitat relationships, benthic community analyses)

The distribution of species is influenced by environmental (abiotic and biotic) factors. Modern statistical techniques make it possible to analyse species-habitat relationships and, given a sufficient data availability, to develop habitat models. Such models provide a quantitative description of species-habitat relationships. Results of such analyses for different polychaete species are shown in the images to the right.

Focus of the IceAGE project is on the development of species distribution models for benthic invertebrates occurring in Icelandic waters. As a result, species distribution maps as seen to the right for the polychaete Prionospio cirrifera are presented. In subarctic environments (as e.g. Iceland) the importance of climate-related predictors in the models is of particular interest. Potential changes of species distribution against the background of future climate scenarios can be discussed.

Apart from focussing on single species the analysis of species assemblages (e.g. benthic communities) by means of multivariate statistical methods can be undertaken. One aspect is to analyse community structure against the background of various environmental conditions. In conclusion, a change in community structure can be described in detail and the cause of change might be revealed.

Infauna Benthosökologie
Principal Component Analysis (PCA)