Sökning: "Hymenoptera"

Visar resultat 6 - 10 av 17 uppsatser innehållade ordet Hymenoptera.

  1. 6. Flower-visiting insects benefit from forest in the surrounding landscape

    Kandidat-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Emilia Sundell; [2021]
    Nyckelord :Apoidea; clear-cut; Coleoptera; forest; Hymenoptera; landscape composition; Lepidoptera; Syrphoidea;

    Sammanfattning : Habitat loss and fragmentation due to agricultural practices are causing worrying declines in insect diversity and biomass. Agricultural intensification, among other things, have led to a decline in semi-natural grasslands. Forest in the surrounding landscape can have a positive effect on species abundance in grasslands. LÄS MER

  3. 7. Effekter på nyttoinsekter: Finns det en skillnad i diversitet hos parasitoida steklar mellan GMO och konventionell majs, i Borgeby, Skåne?

    Kandidat-uppsats, Lunds universitet/Examensarbeten i biologi

    Författare :Arvid Lindh; [2016]
    Nyckelord :Biology and Life Sciences;

    Sammanfattning : Genetically modified plants (GM-plants) have been controversial since they began being cultivated, especially within the European Union (EU). It is not well known how their unique properties affect both humans’ health and natural ecosystems and therefore lawmaking in EU has been very restrictive around cultivation of the plants. LÄS MER

  4. 8. AHA in northern Sweden – a case study : conservation values of deciduous trees based on saproxylic insects

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

    Författare :Marja Fors; [2015]
    Nyckelord :saproxylic; Coleoptera; Diptera; Hymenoptera; microhabitat; dead wood; biodiversity assessment; AHA-method;

    Sammanfattning : AHA is a Swedish abbreviation of "reveal threatened park and avenue trees" and is a method to assess the conservation value of individual trees, mainly in the park environments but also in natural stands. This method has previously only been practiced in southern Sweden (Sörensson 2008). LÄS MER

  5. 9. Trapping social wasps, in apple orchards and vineyards with synthetic volatiles and live yeast cultures in Scania, Scandinavia

    Magister-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

    Författare :Malin Iris Dörre; [2015]
    Nyckelord :Vespinae; social wasps; lure; semiochemicals; yeast; apple; grapes;

    Sammanfattning : Social wasps (Hymenoptera, Vespinae) foraging for carbohydrate nutrients are a major pest, particularly in berry and fruit orchards. The identification of volatile attractants for social wasp management is accordingly an urgent research challenge. Overripe fruit and fermenting sweet baits are since long known to attract wasps. LÄS MER

  7. 10. Retention of stumps on wet ground at stump-harvest and its effects on saproxylic insects

    Master-uppsats, SLU/Dept. of Forest Products

    Författare :Clémentine Ols; [2011]
    Nyckelord :stump harvesting; wet ground; saproxylic insects; biodiversity; stubbrytning;

    Sammanfattning : Low stumps represent on their own up to 80% of the dead wood remaining on clear cuts and therefore supply suitable habitat for saproxylic insects i.e. insects depending on dead wood for their survival. LÄS MER