Sökning: "Chironomidae larvae"

Hittade 5 uppsatser innehållade orden Chironomidae larvae.

  1. 1. Metaller i Vombsjön - Mygglarver som bioindikator för miljöövervakning

    Kandidat-uppsats, Lunds universitet/Centrum för miljö- och klimatvetenskap (CEC)

    Författare :Siri Bengtsson; [2024]
    Nyckelord :Bioindicators; Chironomidae; Freshwater source; Lake Vomb; Metal concentrations; Pollution; Sediment sampling; Earth and Environmental Sciences;

    Sammanfattning : This study investigates concentrations of eight metals (Cu, Zn, Cd, Pb, Hg, Cr, Ni, As) in the freshwater resource Lake Vomb, located in the south of Sweden (Scania), and explores the potential use of deformed Chironomidae larvae as bioindicator. Sediment samples from six locations were analysed against threshold values from the Swedish Agency for Marine and Water Management and background values from the Swedish Environmental Protection Agency. LÄS MER

  3. 2. Stickleback diets in bays along the northen Baltic Sea

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Douglas Skarp; [2019]
    Nyckelord :stickleback; perch larvae; predation; competition; bay;

    Sammanfattning : Coastal populations of perch (Perca fluviatilis) in the Baltic Sea has declined substantially the last decades while the populations of three-spined sticklebacks (Gasterosteus aculeatus) has increased rapidly during the same time period. Earlier studies have suggested that predation on perch larvae and or competition from sticklebacks are the causes behind the decline in perch. LÄS MER

  4. 3. Mouthpart deformities of Chironomid larvae as an indicator of heavy metal polluted water

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Tim Lindström Jonsson; [2019]
    Nyckelord :Chironomidae larvae; Deformities; Heavy metals; Biomonitoring; Mining; Northern Sweden;

    Sammanfattning : Freshwater ecosystems are under increasing pressure from a variety of contaminants, including heavy metals from mining operations, which can have complex effects that are difficult to evaluate. To detect early warnings from elevated concentrations of metals, organisms are sought to be used as monitoring tools. LÄS MER

  5. 4. Förekomsten av mundelsskador hos Fjädermygglarver i Skellefteälven

    Magister-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Julia Hofman; [2015]
    Nyckelord :Mouthpart deformity; Chironomidae; Skellefteälven; environmental pollution; Earth and Environmental Sciences;

    Sammanfattning : Larvae from the non-biting midge family Chironomidae have previously been demonstrated to be sensitive to environmental pollution in aquatic environments. Exposure to different contaminants has resulted in an increasing occurrence of deformities of the mouthparts in the larvae. LÄS MER

  7. 5. How does predation from fish influence the benthic invertebrates’ species composition in the Phragmites australis and Chara vegetation of Lake Takern?

    Master-uppsats, Ekologi

    Författare :Ernest Aigbavbiere; [2011]
    Nyckelord :Handling time; intake rate; predation; macro-invertebrates.;

    Sammanfattning : Predation is one of the important selective factors that regulate the species composition of benthic invertebrate communities. The study objective was to investigate the invertebrate distribution in two contrasting habitats in Lake Takern, southern Sweden, submerged Chara vegetation and emergent Phragmites australis vegetation, and to investigate the influence of predation from fish on certain invertebrates. LÄS MER