Sökning: "aquatic insects"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden aquatic insects.

  1. 1. Restaureringens betydelse för insekter i strandzonen

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

    Författare :Oskar Johansson; Isak Landström; [2019]
    Nyckelord :akvatiska insekter; fisk; flottning; makroevertebrat; vattenekologi; älv;

    Sammanfattning : Flottningen har varit en dominerande del av transporten för skogsråvara sedan skogsindustrierna började växa fram under mitten av 1800-talet. Trots att flottningen idag har upphört är effekterna fortfarande kvarvarande efter den flottledsrensning som utfördes i vattendragen. LÄS MER

  3. 2. Stigande havsnivåers påverkan på hotade groddjur

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Linn Andersson; [2017]
    Nyckelord :havsnivåhöjning; klimatförändringar; kustnära habitat; groddjur; bevarandearbete; naturvård; GIS; Earth and Environmental Sciences;

    Sammanfattning : Climate change and biodiversity loss are two of the major challenges of our time, and are strongly interconnected. Sea level rise is a consequence of these and a significant threat to global coastal habitats. LÄS MER

  4. 3. Inelastic LIDAR for Monitoring Aquatic Fauna

    Master-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

    Författare :Mikael Ljungholm; [2016]
    Nyckelord :LIDAR; Laser; hyperspectral; multispectral; inelastic; ecology; monitoring; plankton; aquatic; Scheimpflug; Technology and Engineering;

    Sammanfattning : This thesis is oriented around designing the world first inelastic hyperspectral LiDAR(Light Detection and Ranging) system for aquatic use. The system was designed around the task of monitoring zooplankton and environmental indicators in water. Scheimpflug lidar was previously developed for monitoring flying insects, aerosols and gases. LÄS MER

  5. 4. Do Trichoptera in running water fly upstream?

    Kandidat-uppsats, Linköpings universitet/Biologi; Linköpings universitet/Tekniska fakulteten

    Författare :Malin Larsson; [2015]
    Nyckelord :Trichoptera; drift; colonisation cycle; upstream flight;

    Sammanfattning : Drift moves aquatic insects downstream, risking depopulation of upstream reaches. However, the necessity and exist­ence of an upstream flight to compensate for drift has not been undisputed. I analysed a sample of approximately 70 000 Trichoptera from a stream in northern Sweden collected during one season in 1974. LÄS MER

  7. 5. Effects of Environmental Variables on Four Aquatic Insect Taxa among Smaller Water Bodies of Different Ages on Farmland; A Pilot Study

    Master-uppsats, Högskolan i Halmstad/Bio- och miljösystemforskning (BLESS)

    Författare :Assad Jaggwe; [2015]
    Nyckelord :Water bodies; Age; Insect species; Biodiversity; Agricultural land; Conservation;

    Sammanfattning : High anthropogenic modification like infrastructural development, drainage, eutrophication, dumping garbage, is a threat to biodiversity of smaller water bodies in agricultural landscapes. However, smaller water bodies have historically been constructed for drainage, waste treatment and other purposes. LÄS MER