Sökning: "Channelized streams"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Channelized streams.

  1. 1. Utvärdering av biotopvårdande åtgärder i Grimåsbäcken. En analys av fysikaliska egenskaper och sammansättning av makroevertebrater.

    Kandidat-uppsats, Göteborgs universitet / Instiutionen för biologi och miljövetenskap

    Författare :Björn Andermo; [2024-01-22]
    Nyckelord :Channelized streams; retention; biotope preservation; macroinvertebrates; bottom substrate; woody debris.;

    Sammanfattning : Many streams have been exposed to extensive anthropogenic impact for the benefit of forestry and agriculture. The effects has mainly been channelization characterized by lowered and straightened channels. This homogeneous morphology leads to decreased ability to retain water as well as lost connection to the floodplain. LÄS MER

  3. 2. Dispersal and habitat use of juvenile brown trout (Salmo trutta) following egg stocking : -A case study in the river Rotälven, Sweden

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

    Författare :Jonathan Larsson; [2022]
    Nyckelord :brown trout; egg stocking; dispersal; alevin; fry; parr; redd; habitat preference; Öring; romutsättning; spridning; yngel; parr; habitatpreferens;

    Sammanfattning : Egg stocking in rivers and streams is a common measure to support and re-introduce salmonid populations. To ensure the success of egg stocking programs, knowledge of the early life stages of juveniles including dispersal ability and habitat preferences of fry is a prerequisite. LÄS MER

  4. 3. Aspects of erosion of restored trout spawning beds in two streams in Northern Sweden

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

    Författare :Frida Michelle Granlund; [2021]
    Nyckelord :in-stream restoration; reproductive habitat; salmonids; passive integrated transponders tags PIT-tags ;

    Sammanfattning : Many rivers and streams in northern Sweden have been channelized due to timber floating. This has severely degraded the spawning habitats for salmon and trout, and therefore a common action when restoring channelized rivers is to establish new spawning beds by adding gravel to the streambed. LÄS MER

  5. 4. Physical microhabitat requirements for Margaritifera margaritifera and the influence of hydro- and morphodynamics on mussel bed stability

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

    Författare :Tove Westberg; [2020]
    Nyckelord :Stream restoration; Freshwater pearl mussel; Microhabitat requirements; Sediment transport; Mussel translocation;

    Sammanfattning : Margaritifera margaritifera is an endangered freshwater pearl mussel with population declines throughout its Holarctic range. Boulder-bed channels with little input of fine sediment in previously channelized streams are abundant in Sweden. Hence, restoration efforts for M. LÄS MER

  7. 5. Kanalisering och restaurering av vattendrag och dess påverkan på mossamhällen i strandzonen

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

    Författare :Carola Knudsen; [2019]
    Nyckelord :Bryophytes; liverworths; mosses; channelization; restoration; stream ecosystem; bryophyte communities; riparian zone; Mossa; mossor; kanaliserade vattendrag; restaurering; mossamhällen; sötvattensekosystem; levermossor; strandzonen;

    Sammanfattning : In the 1850s when the timber floating began in Sweden many streams were channelized, which meant that the streams were straightened out, side channels were closed, and stones, trees and boulders were moved out to the banks of the streams. These measures altered the morphology of the streams, causing impediments to water moving in from the stream to the riparian zone, and reduced flooding frequency. LÄS MER