Sökning: "bumblebee"

Visar resultat 16 - 20 av 33 uppsatser innehållade ordet bumblebee.

1. 16. The impact of managed honeybees and commercial reared bumblebees on pathogens in wild bees

   Master-uppsats, SLU/Dept. of Ecology

   Författare :Sofie Tinggren; [2020]
   Nyckelord :honey bee; bumblebee; diseases; commercial bees; bee intensity;

   Sammanfattning : Bees are important beneficial insects due to their ability to pollinate our crops and vegetables, as well as being critically important for maintaining wild floral biodiversity. Bees are important from both an economic perspective and an environmental perspective, which highlights the importance of having healthy and sustainable bee populations. LÄS MER

3. 17. Flowering phenology, pollination and seeding interactions in Garden Lupine (Lupinus polyphyllus)

   Kandidat-uppsats, Karlstads universitet

   Författare :Amanda Boström; [2020]
   Nyckelord :pollination; Garden Lupine; bumblebee; Bombus; Lupinus polyphyllus; self-pollination; pollinering; blomsterlupin; humlor; Bombus; Lupinus polyphyllus; självpollinering;

   Sammanfattning : The spreading of the invasive plant Garden Lupine (Lupinus polyphyllus) has become a matter of national importance in Sweden, due to it posing a threat to native plant and pollinator diversity. The effective attraction of bumblebees (Bombus spp. LÄS MER

4. 18. 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

5. 19. 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

7. 20. 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