Förändringar av miljöförhållanden i två naturområden i Helsingborg

Sammanfattning: Since the 1800’s the agriculture has changed and intensified significantly, going from small scale farming to large homogenous arable landscapes with fewer grazing animals, more fertilizers and pesticides. In Sweden, this pattern of intensification has been very distinct, especially in Scania, which today is dominated by plains. This has left substantial changes in the surrounding ecosystems, affecting biodiversity and flora as well as ecosystem services. Because the flora adapts according to the surrounding environment, it is possible to detect which environmental factors that has changes by comparing the flora through time. Here I have tested if the floral changes in two semi-natural habitats in Helsingborg, surrounded by farmland, could show environmental changes connected to the plant species requirements of nitrogen availability in the soil, pollination dependence, dependence of mowing or grazing and pH levels requirements. I found effects from increased nitrogen availability and a decrease in pollinators in one of the study sites, but no changes in the other area, although both are surrounded by farmland.