Essays about: "insect populations"

Showing result 16 - 20 of 24 essays containing the words insect populations.

  1. 16. Staden som habitat för vilda pollinerande insekter : en möjlig tillflykt för missgynnade arter

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Julia Serfezi; [2017]
    Keywords : solitärbi; humla; fjäril; blomfluga; blommande; nektarväxt;

    Abstract : Vilda pollinerande insekter spelar en viktig roll i upprätthållandet av såväl naturliga som konstgjorda, av människan skapade, landskap. De underhåller exempelvis pollineringen av blommande växter. Då insekter är mycket känsliga för miljöförändringar har deras biologiska mångfald och antal minskat under de senaste årtiondena. READ MORE

  3. 17. Snytbagge på brända och obrända kalhyggen

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

    Author : Erik Fernemar; [2016]
    Keywords : Hylobius abietis; brand; hyggesbränning; kalhyggen;

    Abstract : I dagens skogsbruk har större skogsägare en typ av certifiering som kallas för FSC (Forest Stewardship Council). Denna standardkvalificering ger olika krav på miljö, skogsbruk och socialstandard som skogsägaren måste uppfylla för att certifieringen skall gälla. READ MORE

  4. 18. Extended phenotypes in the canopies of Norway spruce

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

    Author : Christofer Johansson; [2016]
    Keywords : extended phenotypes; Cinara spp.; Picea abies; associated organisms; C:N ratio; growth rate; aphid abundance;

    Abstract : The extended phenotype may help us understand how genetically determined trait variation in foundation species can influence associated organisms. Today, there is no existing demonstration of how genetically determined trait variation in Norway spruce (Picea abies) may affect associated organisms in tree canopies. READ MORE

  5. 19. Fatal attraction : do virus-infected cadavers of Spodoptera littoralis larvae attract healthy conspecifics?

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Saki Matsumoto; [2015]
    Keywords : Spodoptera littoralis; cannibalism; necrophagy; nucleopolyhedrovirus; horizontal transmission; Baculovirus;

    Abstract : Baculoviruses manipulate insect larval behaviour by inducing increased activity and by enhancing the movement to the top of the host plant. The Spodoptera littoralis nucleopolyhedrovirus (SpliNPV) may have a large impact on larval populations and is currently used as a control method. READ MORE

  6. 20. The foliar bacterial endophyte community in native Pinus radiata: a role for protection against fungal disease?

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Arielle Reivant Munters; [2014]
    Keywords : 16S; bacterial endophytes; endophyte; Illumina; conifers; Monterey pine; Pinus raditata;

    Abstract : Pinus radiata is the most planted tree in the southern hemisphere. The planted trees are especially susceptible to pathogens, but even the native population, nowadays limited tomerely five locations, are threatened by diseases caused by arthropods, fungi and dehydration. READ MORE