Sökning: "Recolonisation"

Hittade 4 uppsatser innehållade ordet Recolonisation.

  1. 1. A computational model of metapopulation dynamics and organism-mediated nutrient flow

    Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Amanda Hansson; [2023-08-07]
    Nyckelord :computational model; population dynamics; metapopulation dynamics; nutrient flow; simulation; spatially explicit; individual-based;

    Sammanfattning : The aim of this project was to assess, using in-silico experiments, how different life history char-acteristics, such as age at maturity and dispersal ability of individuals, influence the dynamics of a metapopulation. To achieve this, a novel model of a spatially explicit metapopulation, with organ-ism-mediated nutrient flow between fragmented habitat patches, was implemented by means of computer simulations. LÄS MER

  3. 2. Disentangling risk in a multi-predator landscape : roe deer respond to differing patterns of risk to lynx, wolves and humans through shifts in their habitat selection

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Andrew Lewis; [2015]
    Nyckelord :Canis lupus; Capreolus capreolus; indirect effects; landscape of fear; Lynx lynx; multi-predator systems; predation risk; Scandinavia; spatial risk patterns; ungulates;

    Sammanfattning : Predation risk is known to evoke behavioural responses in prey animals, and prey are often faced with a trade-off between lowering their risk to predation and acquiring resources. This situation becomes more complex in a multi-predator landscape, especially if those predators employ different hunting strategies, and induce different spatial patterns of risk. LÄS MER

  4. 3. Epiphytic lichens associated with different traffic intensities along the highway E4

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Chiho Okuyama; [2011]
    Nyckelord :Bioindicator; Air pollution; Species richness; Sensitivity; Recolonisation; Disappearance; Forest ecosystem;

    Sammanfattning : Inventories of epiphytic lichens on Scots pine (Pinus sylvestris) were conducted at three sites in east central Sweden: along the newly build motorway (Road E4), along the old road (Road 600) and in a reference site, to compare the effects of traffic pollution on lichen diversities. At each site, species richness, lichen mean sensitivity value (MK), air quality index of the forest stand/sample plot (LKI) and nitrogen impact value (N) were calculated and it was tested if there was any difference between the sites. LÄS MER

  5. 4. Naturvärden i en värmländsk bruksskog : en skogshistorisk studie av Åbengtshöjden/Bogranghöjden

    L3-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Martine Isaksson; [1997]
    Nyckelord :skogshistoria; biologisk mångfald; naturvård; kolning;

    Sammanfattning : In this study I have analysed the history of a forest belonging to Saxåhyttan in Värmland. The study area is 448 hectares and has been used by iron industry since the 16th century. A forest that has been used by man during at least 400 years should have few ecological values. This inventory however shows the opposite. LÄS MER