Essays about: "habitat patch size"

Showing result 1 - 5 of 10 essays containing the words habitat patch size.

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

    University essay from Göteborgs universitet / Institutionen för biologi och miljövetenskap

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

    Abstract : 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. READ MORE

  3. 2. Ground-nesting bees in the age of urbanization : quality of sandy habitat and wild bee diversity in Uppsala, Sweden

    University essay from SLU/Dept. of Ecology

    Author : Indre Cepukaite; [2022]
    Keywords : ground-nesting bees; wild bees; cleptoparasitic bees; indicator taxon; urbanization; sandy soil; bare soil; habitat age; ground cover; diversity; pollinator protection and conservation;

    Abstract : Wild bees are indispensable pollinators of most flowering plants and agricultural crops, and thus are vital components of functioning ecosystems and provide essential ecosystem services to humans. This study primarily aimed to discover the environmental features of nesting habitat that are mostly associated with wild ground-nesting and associated cleptoparasitic bee species diversity in urban landscape. READ MORE

  4. 3. Humpback whale (Megaptera novaeangliae) location in Southeast Alaska : modeling the influence of mesoscale krill (Euphausiacea) patch depth and size

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Christine Walder; [2018]
    Keywords : physical geography and ecosystem analysis; humpback whales; krill; patchiness; vertical distribution; Generalized Additive Models GAMs ; spatial modeling; Earth and Environmental Sciences;

    Abstract : Humpback whales ([i]Megaptera novaeangliae[/i]) require dense prey aggregations due to the high energetic cost of their feeding methods. Modeling studies have shown that when whales are on their feeding grounds, they are closely associated with high prey concentrations. READ MORE

  5. 4. Do we protect the right forests? – A case study of representativeness of protected forests in Östergötland, Sweden, and identification of tracts of value.

    University essay from Linköpings universitet/Biologi; Linköpings universitet/Tekniska fakulteten

    Author : Emilia Bröms Axelsson; [2015]
    Keywords : Forest representativeness; connectivity; protected forests; forest productivity;

    Abstract : Protected forests need to be a representative selection of the natural proportion of forest types, including distribution of productivity levels, age classes and nature types This is important for the possibility to preserve biodiversity. In addition, the protected areas has to be of sufficient size and not isolated from each other, to function as effective biodiversity preservers. READ MORE

  6. 5. Spawning site selection of brown trout in habitat restored streams

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Jonas Svensson; [2012]
    Keywords : Salmo trutta; Vindelälven; in-stream restoration; Hartijokki-method;

    Abstract : During the timber floating era, most of Sweden’s watercourses were altered. This decreased the amount of available spawning habitats for salmonids, and hence had a negative effect on the riverine brown trout (Salmo trutta) populations. Reconstruction of spawning grounds is today a common measure in restoration of altered streams in Sweden. READ MORE