Sökning: "Hester-Dendy-provtagare"

Hittade 3 uppsatser innehållade ordet Hester-Dendy-provtagare.

  1. 1. How does hydropeaking and geological substrate affect aquatic macroinvertebrates in a regulated river?

    Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Författare :Andreas Vernby; [2021]
    Nyckelord :Hydropeaking; geological substrate; aquatic macroinvertebrates; EPT species; Hester-Dendy samplers; Korttidsreglering; geologiskt substrat; akvatiska makroevertebrater; EPT; Hester-Dendy-provtagare;

    Sammanfattning : Hydropower is an important source of renewable energy, but is often a cause of degradation to river ecosystems. Hydropeaking, i.e. the frequent alteration of discharge, is a process involved in hydropower generation and has been proven to affect aquatic organisms negatively. LÄS MER

  3. 2. Sammansättning av funktionella födosöksgrupper hos akvatiska insekter i vattendrag med och utan korttidsreglering

    Kandidat-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Pontus Hindrikes Bergström; [2021]
    Nyckelord :Functional feeding groups; Aquatic invertebrates; FFG; Shredders; Grazers; Gatherers; Filter feeders; Predators; Hydropeaking; EPT; Funktionella födosöksgrupper; Korttidsreglering; akvatiska insekter; FFG; EPT;

    Sammanfattning : Hydropeaking is important to meet peak demand of electricity on the Swedish powergrid. The rapid changes in discharge may affect the ecology of streams and rivers negatively downstream of hydropeaking powerplants. LÄS MER

  4. 3. Macroinvertebrate sampling in hydropeaking rivers : Testing Hester-Dendy samplers in a laboratory environment using different flow conditions

    Kandidat-uppsats, Karlstads universitet/Avdelningen för biologi

    Författare :Mattias Hansson; [2020]
    Nyckelord :hydropower; bioassessment; benthic macroinvertebrates; biotic indicator; vattenkraft; biologiska bedömningsgrunder; bentiska makroevertebrater; bioindikator;

    Sammanfattning : Degraded rivers and streams caused by disturbances have created a need for reliable tools to assess the ecological status of such ecosystems. Numerous methods and programs have been developed to assess ecological status using biological indicators, benthic macroinvertebrates are the most commonly used biotic indicator. LÄS MER