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Summary The common spadefoot toad (Pelobates fuscus) in an agricultural landscape near Heimerzheim in the Rhein Sieg district, Germany: local abundance, amphibian community and introduction success At three ponds in an agricultural landscape near Bonn, Germany we surveyed the common spadefoot toad using drift fences in springtime. We aimed to get t...
We studied an isolated population of Campanula rapunculus and two oligolectic bee species of Chelostoma (Megachilidae), their main pollinators. The population of C. rapunculus consisted of 2808 plants. Measurements of pollen flow showed that 3.7% of the pollen produced by a flower contribute to pollination, 95.5% was collected by bees for their off...
Resource partitioning between the oligolectic leafcutter bee Megachile lapponica (Hymenoptera, Apiformes) and other visitors on flowers of Epilobium angustifolium (Onagraceae). In a clear-felling in the Kottenforst (Bonn) we registered the abundance of flower visiting insects on Epilobium angustifolium and observed their behaviour during flower vis...