Sökning: "bumblebee"

Visar resultat 1 - 5 av 18 uppsatser innehållade ordet bumblebee.

  1. 1. Bumblebee resource dynamics : a review of foraging and nesting in the agricultural landscape

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Anna Douhan Sundahl; [2020]
    Nyckelord :bumblebees; bumblebee population dynamics; bumblebee drivers; flower strips; competition with honeybees; foraging; nesting; hibernation;

    Sammanfattning : 90 % of all plants on earth either benefits or entirely depends on pollination. There are pollinators among families of bees (Apidea), butterflies (Lepidoptera) and birds (Aves). Bees of genus Bombus spp., bumblebees, are especially important and provide pollination service for 80 % of the crops of Europe and many wild plant species. LÄS MER

  2. 2. Park för biologisk mångfald : ett förslag för utformning med fokus på pollinerande insekter och fåglar

    Master-uppsats, SLU/Department of Landscape Architecture, Planning and Management (from 130101)

    Författare :Sofie Valtinat; [2020]
    Nyckelord :ekologisk design; gestaltning; indikatorarter; habitatkrav; solitärbin; humlor; dagfjärilar; fåglar;

    Sammanfattning : Biologisk mångfald minskar, och att ta hänsyn till den även i urban planering blir viktigare och allt vanligare. Urbanisering ses som en av de största faktorerna till minskad biologisk mångfald, men urbana områden kan även tillhandahålla habitat som gynnar en mängd arter. LÄS MER

  3. 3. Bumblebee learning flights at a flower : viewing direction on departure is influenced by landmark position on approach

    Master-uppsats, Linköpings universitet/Biologi

    Författare :Michael Plante-Ajah; [2019]
    Nyckelord :bumblebee; bee; learning flight; insect navigation;

    Sammanfattning : Bumblebees, like other Hymenopterans, perform learning flights when departing their nest for the first few times or when departing from a newly discovered food source. As bees can learn about the landmarks around a flower both on approach and on departure, it is possible that what they see and learn on approach affects what they focus on during their learning flight on departure. LÄS MER

  4. 4. Hur påverkas humlor, Bombus spp., av artrika vägkanter?

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Mika Thunell; [2019]
    Nyckelord :humlor; artrika vägkanter; artdiversitet;

    Sammanfattning : Bumblebees are decreasing in large areas around the world due to a homogenous and fragmented landscape as a result of intensified agriculture. In this study I will investigate if species rich roadsides can work as a substitute to the habitat-loss for the bumblebees. LÄS MER

  5. 5. The effect of ecological forest restoration on bumblebees (Bombus spp.) in the boreal forest

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Raisja Spijker; [2018]
    Nyckelord :bumblebee; Bombus spp.; forest restoration; abundance; species richness; species composition; boreal forest;

    Sammanfattning : Insect pollinators are an important part of biodiversity, yet the number of pollinating insects is declining all over the world. Of all the wild plant species about 80% are reliant on insect pollinators, with bees being most important. One of the main causes behind the decline of insect pollinators is the loss and fragmentation of habitats. LÄS MER