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Aim We investigated how current and historical land use and landscape structure affect species richness and the processes of extinction, immigration and species turnover. We resurveyed 27 islands ranging from 0. Methods We compared current plant survey data, cadastral maps and aerial photographs with records obtained from a survey inusing databases and a digital elevation model to examine changes in plant community dynamics in space and time. We examined the effects of local and landscape structure and land use changes on plant species dynamics by using stepwise regression in relation to eight local and three landscape variables. The eight local variables were area, relative age, shape, soil heterogeneity, bedrock ratio, number of houses, forest cover change, and grazing years ago. The three landscape variables were distance to mainland, distance to closest island with a farm years ago, and structural connectivity.

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