9 uppsatser
Statusbedömning enligt EU:s ramdirektiv för vatten
… the ecological quality of River Lillån based on water chemistry analyses and benthic fauna investigations. The aim was also for the benthic fauna to compere different samplingsites and sampling methods with each other in order to see how the species composition changes in the …
The aim of this work is to analyze if a change in the benthic community can be detected two years after a restoration of a small stream. The samples were taken in a small stream at Tinnerö Eklandskap just south of Linköping. In addition to the restored area, two reference sites …
… one stretch downstream and one upstream stretches of the restored stream. The benthic invertebrates were collected using standardized kick sampling. In order to classify the communities and estimate any differences, three different indices were exercised. In addition …
… and Water Inventory" in the county of Värmland. It was also determined if the benthic fauna composition had been changed downstream from the tracks, in the parts of the stream that had been affected by erosion. This data was then compared with the parts of the stream that had …
Benthic invertebrates play important roles as feeding resources for many organisms in different food webs. Shifts in predation of these organisms can generate cascading effects and potentially lead to the disappearance of one or more species from a site. Cascading effects can …
Effekt på abundans, samt återhämning, av funktionella födogrupper efter kalavverkning kring små vattendrag.
… ecosystems. The aim of this study was to investigate how the abundance of benthic invertebrate functional feeding groups in headwater streams develops after clear-cutting and if it also is possible to detect a change in the composition of feeding groups. The study also attempts …
en identifiering av utfasningsämnen i spillvattnet
Benthic invertebrates play important roles as feeding resources for many organisms in different food webs. Shifts in predation of these organisms can generate cascading effects and potentially lead to the disappearance of one or more species from a site. Cascading effects can …
… quality factors used for lakes. The others are phytoplankton, diatoms, benthic fauna and fish. The two latter were included in this thesis. In addition to the biological factors the chemical factor, nutrients in lakes, i.e. the total phosphorus, was included. The macrophyte …
en fältstudie av bieffekter av insekticidinducerad eliminering av signalkräfta på Gotland
Direct effects of the insecticide deltamethrin on zooplankton and benthic invertebrates werestudied during an attempt to eradicate signal crayfish. In accordance with earlier studies theresults of this investigation showed that deltamethrin is highly toxic for arthropods …
