1 Department of Policy Analysis, National Environmental Research Institute, Aarhus University, Aarhus University2 Department of Environmental Science - Emission modeling & enviromental geography, Department of Environmental Science, Science and Technology, Aarhus University3 Department of Environmental Science - Emission modeling & enviromental geography, Department of Environmental Science, Science and Technology, Aarhus University
Provision of semi-natural habitats is an important service of agricultural ecosystems. Quality and extent of semi-natural habitats is closely linked with intensity of agricultural management. Grass-dominated habitat types often depend on extensive management in terms of grazing or mowing. Lack of management is followed by succession to scrub and forest vegetation, leading to declining habitat quality or even disappearance of the habitat. In contrast, intensive management in terms of ploughing, sowing and often draining alter the biophysical conditions in such degree that characteristic vegetation compositions of semi-natural habitats disappear. For Denmark, we apply parcel-specific data on agricultural land use to map convergences and conflicts between agriculture and biodiversity. We group land-uses into intensive and extensive and overlay these with a map of grass-dominated semi-natural habitats. 61 % of habitats overlap with extensively managed land, indicating convergence between agriculture and biodiversity. In contrast, 13 % of habitats overlap with intensively managed land, pointing at severe conflicts between agriculture and biodiversity. 27 % of habitats are located outside any agricultural land indicating declining habitat quality due to lack of management. Meanwhile, 53 % of all extensively managed land does not overlap with semi-natural habitats, pointing at a potential for development of semi-natural vegetation compositions. We conclude that parcel-specific data on agricultural land use have a high potential for mapping of convergences and conflicts between agriculture and semi-natural habitats and consequently for location-specific management of biodiversity in agricultural landscapes.