Essays about: "habitat fragmentation"

Showing result 1 - 5 of 83 essays containing the words habitat fragmentation.

  1. 1. Integrerat växtskydd i stadsmiljö : en undersökning av förutsättningar för en hållbar skötsel av grön infrastruktur

    University essay from SLU/Department of Plant Protection Biology

    Author : Fanny Berglund; [2022]
    Keywords : IPM; ekosystemtjänster; biodiversitet; växtskyddsmedel; bekämpning; grön infrastruktur; urbana miljöer; skadegörare; invasiva främmande arter;

    Abstract : Den ökade urbaniseringen i världen har resulterat i en fragmentering av det naturliga landskapet. Som ett resultat har detta lett till förlust av habitat, en minskad artdiversitet och en påverkan på ekosystemtjänster som är nödvändiga för människans välbefinnande. READ MORE

  2. 2. Effects of past fragmentation and habitat loss and current management methods on the changes in vascular plant communities. : An evaluation of extinction debt in semi-natural grasslands in Sweden

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Adina Sennblad; [2021]
    Keywords : ;

    Abstract : Habitat loss and fragmentation are believed to be two of the main reasons for high extinction rates of species, resulting in decreased biodiversity. According to the island biogeography theory, the species richness in a patch, here a semi-natural grassland, is dependent on the landscape composition, and therefore changes in the landscape composition will result in changes in the species richness of the grassland. READ MORE

  3. 3. Flower-visiting insects benefit from forest in the surrounding landscape

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Emilia Sundell; [2021]
    Keywords : Apoidea; clear-cut; Coleoptera; forest; Hymenoptera; landscape composition; Lepidoptera; Syrphoidea;

    Abstract : Habitat loss and fragmentation due to agricultural practices are causing worrying declines in insect diversity and biomass. Agricultural intensification, among other things, have led to a decline in semi-natural grasslands. Forest in the surrounding landscape can have a positive effect on species abundance in grasslands. READ MORE

  4. 4. Direct and indirect effects of roe deer (Capreolus capreolus) herbivory on an island population of Chequered blue butterfly (Scolitantides orion).

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Alexandra Johansson; [2021]
    Keywords : Scolitantides orion; Chequered blue butterfly; oviposition; oviposition behaviour; Indirect and direct effects; herbivory;

    Abstract : Herbivory by ungulates is a known agent of disturbance in many ecological systems around the globe. At high abundances and through a selective foraging behaviour herbivory may inflict significant direct and indirect effects on local plant and animal communities. READ MORE

  5. 5. Effects of population size, density and local environment on the population dynamics of the fragrant orchid (Gymnadenia conopsea)

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Kasper Kupka; [2021]
    Keywords : Demography; Gymnadenia conopsea; local habitat; matrix models; orchids; population density; population size; stochastic growth rate; soil organic matter; quasi-extinction probability;

    Abstract : A wide majority of orchid populations are decreasing due to habitat fragmentation and to changes in land management. Population size, density and habitat quality are factors that are expected to be positively related to the viability and future growth of a population. READ MORE