Sökning: "B. terrestris"
Visar resultat 1 - 5 av 8 uppsatser innehållade orden B. terrestris.
1. Competition between managed honeybees and wild bumblebees - Quantifying dietary overlap in semi-natural grasslands
Kandidat-uppsats, Lunds universitet/Centrum för miljö- och klimatvetenskap (CEC)Sammanfattning : The decline of bees, such as bumblebees, over the last decades raises concerns as they are key pollinators in both agricultural and natural ecosystems. One proposed cause for the decline of wild bees is competition for food resources with managed honeybees. LÄS MER
2. The relative effects of season and imported bumblebee colonies on the distribution of ten common pathogens in wild Swedish bumblebees
Kandidat-uppsats, Uppsala universitet/Institutionen för medicinsk cellbiologiSammanfattning : Due to recent declines regarding pollinators, The Swedish Civil Contingencies Agency launched a project investigating possible biological threats towards wild bumblebees. This led to an extensive collection of bumblebees from areas in southern Sweden during the summer of 2018. LÄS MER
3. Insect pollination of faba beans, Vicia faba : the abundance and foraging behaviour of different pollinators and their effect on crop yield
Kandidat-uppsats, SLU/Dept. of EcologySammanfattning : Faba beans, Vicia faba is known as a self-pollinating crop, however significant yield increases have been found in plants visited by honeybees and bumblebees. The bees either make positive visits, entering the flower and transferring pollen between different flowers resulting in cross-pollination, or negative visits, piercing the flower to “steal” nectar or collect nectar from extrafloral nectaries. LÄS MER
4. The impact of managed honeybees and commercial reared bumblebees on pathogens in wild bees
Master-uppsats, SLU/Dept. of EcologySammanfattning : 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
5. Importance of bumble bee community evenness for crop pollination : a simulation analysis of Swedish red clover seed production
Magister-uppsats, SLU/Dept. of EcologySammanfattning : The red clover seed production systems are dependent on pollinators for increase in red clover seed yield and its stability. When compared to domesticated honey bees, the wild bumble bees are highly efficient in pollinating the red clover crop due to its relatively longer tongue length. Longer dependence on single pollinator species i.e. LÄS MER
