Biodiversitet av evertebrater på vegetativa tak
In a city sometimes conflicts arise between either to save the species-rich vacant lots where many species thrive, or to build new buildings. Green roofs can then serve as a refuge for plants and animals that have had their natural habitat destroyed or diminished. Today we know too little about green roofs contribution to the biodiversity in the cities. We also know very little about how various types of vegetation on roof can increase biodiversity and its ability to attract different species.The aim with this study was to examine how different types of vegetation on the roofs affect the biodiversity of the invertebrate and how species-composition and number of individuals differ between the roof- and groundlevel.This study has been carried out on Augustenborg Botanical Roof Gardens in Malmo, and in an area about 1.5 kilometers away from Augustenborg. Three different types of vegetation on the roof and ground floor were selected: sedum- ruderal and grass. The sedum roof consists of a thin layer of soil where sedum species and mosses grow. Grass roof consists of a thicker layer of soil with different grasses and meadow plants. The ruderal roof consists of a thin layer of soil with plenty of rocks and gravel on top and the vegetation is varied and scarce.Grass roof had the highest biodiversity and was also the roof with the highest number of species and individuals. The thick soil on this roof serves as protection against sun and heat, and allows species to lay eggs and to find food. The grassvegetation on the ground also contained the greatest number of species and individuals and had the highest biodiversity. This is explained by its thick soil substrate and that the area is covered with a large variety of both high-and low-growing plant species which provide shelter, shade and nectar for both mobile and non-mobile invertebrates.The sedum roof has the lowest biodiversity and the highest eveness in abundance among species. The combination of plantdiversity and thin soil layer allows just a small number of species to thrive on the roof. The invertebrates consists of mainly mobile species. Many of the species found depends on nectar and pollen as a foodsource, which is abundant on the roof from early summer and autumn when the sedum species are in bloom.The ruderal roof is slightly different from the other roofs, the landscape is dry and scarce which makes it difficult for many species to survive. Ruderal roof have the least number of species and lowest biodiversity. The results