Essays about: "Hymenoptera"

Showing result 1 - 5 of 13 essays containing the word Hymenoptera.

  1. 1. Insects in conifer logs : their association to the polypore fungi Amyloporia sinuosa, A. xantha and Neoantrodia serialis and impact of aggregations of wood

    University essay from SLU/Dept. of Ecology

    Author : Tore Dahlberg; [2023]
    Keywords : polypores; dead wood volume; Amyloporia sinuosa; A. xantha; Neoantrodia serialis; Nemapogon fungivorellus; Agnathosia sandoeensis;

    Abstract : A large number of insects are associated with polypores. They can be monophagous, polyphagous and use several fungal hosts, or be parasites on the insects utilize the fungus. The insect assemblage for some polypores is well investigated but there is still a lack of knowledge for many species. READ MORE

  3. 2. Complementary sex determination in a solitary bee : Mapping candidate sex determination loci and associated genes

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Sara Magnusson; [2022]
    Keywords : Osmia bicornis; solitary bee; sex determination; Csd; Fem; complementary sex determination; hymenoptera;

    Abstract : The molecular mechanism of complementary sex determination in the haplodiploid organisms is poorly understood and has only been described in the honeybee Apis mellifera. In the haplodiploid system, males develop from unfertilized eggs and females from fertilized eggs. However, in some rare cases, diploid males develop from fertilized eggs. READ MORE

  4. 3. Insektsamhällen i restaurerade skogar : en studie på hur abundansen av insektordningarna skalbaggar (Coleoptera), tvåvingar (Diptera), steklar (Hymenoptera) och fjärilar (Lepidoptera) ser ut i luckhuggna och brända bestånd jämfört med kontrollskogar

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : William Arnvik; Emil Gustavsson; [2022]
    Keywords : Naturvårdsbränning; Luckhuggning; Skogsrestaurering; Boreal skog; Död ved; Naturvård;

    Abstract : Den biologiska mångfalden i de boreala skogarna har minskat. Det finns flera orsaker till detta, varav ett är trakthyggesbruket. På grund av trakthyggesbruk har dynamiken och strukturen i skogarna förändrats och strukturen till ett onaturligt tillstånd. Det skapas inte mycket gammal skog p. READ MORE

  5. 4. Diversity patterns and composition of wild bee communities (Hymenoptera: Anthophila) in Swedish boreal forests under different management regimes

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

    Author : Jaime Ramón Luna Santa-María; [2021]
    Keywords : wild bees; Anthophila; forest management; functional diversity; landscape ecology; inventory diversity; boreal forest;

    Abstract : Intensive forest management has led to forest homogenization with associated changes to biodiversity. Compensatory actions have been taken to counteract the negative effects of these practices on biodiversity, but the effectiveness of these actions depends both on which scale they are evaluated and the group of species they are addressed to. READ MORE

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

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

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

    Abstract : 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. READ MORE