Pollinering av tvåhjärtbladiga växter utanför hagmarker i Skåne

Sammanfattning: The aim of this study is to examine the spillover effects of diversity in insect pollinated plants in the vicinity of semi-natural grasslands, if the biodiversity in plants is increased as a result of being close to pastures and if a local environmental support has an effect on its surroundings. As agricultural intensification reduces biodiversity and contributes to habitat degradation, studies on the effects of semi-natural grasslands on the landscape will increase in importance. Not only for the conservation of species, but to keep ecosystem services like pollination of crops. Data collected for another project was utilized to determine which species of plants where abundant at predefined ranges (<100 meters, 250 meters and 500 meters) from the semi-natural grasslands. The different plant communities dependence on insect pollination and dependence on pollination by bumblebees where calculated to look for a possible decline with increased range from the semi-natural grasslands. To statistically account for the different soil conditions when calculating this, the traits for the different plant communities were classified to determine the ecological traits for these communities. The traits used in this study to represent the plant communities is specific leaf area , leaf dry matter content and canopy height. My results showed that the average dependence on pollination at all distances was just short of 90% and like the dependence on bumblebees for its pollination, was not changed over distance. Increased distance from the closest semi-natural grassland showed no significance for the degree of pollination performed by insects in general and the dependence of bumblebees. The analysis showed however a significant correlation between insect pollination and canopy height, and also between dependence on bumblebees and leaf dry matter content. This shows that plants which grow higher are more likely to be dependent on bumblebees.