Sökning: "Karl-Olof Bergman"
Hittade 4 avhandlingar innehållade orden Karl-Olof Bergman.
1. Ecology and conservation of the butterfly Lopinga achine
Sammanfattning : The ecology of the red-listed butterfly Lopinga achine was studied in partly open woodlands in the province of Östergotland, Sweden. Detailed autoecological research is essential for successful conservation of a species, and the present investigation focused on the initial aspects of such work, namely, choice of host plant, habitat selection, and dispersal ability. LÄS MER
2. Host plant choice, habitat selection, dispersal ability and population structure of a threatened butterfly, Lopinga achine
Sammanfattning : Host plant choice, habitat selection and dispersal ability of the red-listed butterfly Lopinga achine were studied in partly open woodland in the province of Östergötland. Females preferred to oviposit near Carex montana, although they did not attach their eggs to any plant. LÄS MER
3. Habitat requirements and preservation of the beetle assemblages associated with hollow oaks
Sammanfattning : One of the most endangered assemblages of species in Europe is saproxylic beetles associated with old trees. To be able to conserve these species there is a need of developing methods to survey the fauna and to evaluate the conservation value of different oak habitats, develop instruments for landscape planning and detailed knowledge of species habitat requirements. LÄS MER
4. Population dynamics in variable environments – impacts of noise colour and synchrony
Sammanfattning : Environmental variation is an essential part of population dynamics, and two characteristics of such variation—variance and the temporal autocorrelation termed ‘noise colour’—are essential for determining the persistence of a population. In addition, the spatial correlation of local environmental variation between habitat patches (i.e. LÄS MER
