Sökning: "vindel river"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden vindel river.

  1. 1. Biflödens effekt på mångfald och abundans av växter i strandzonen utmed älvar : Test av hydrochorins effekt och den longitudinella teorin

    Kandidat-uppsats, Karlstads universitet

    Författare :Daniel Berger; [2023]
    Nyckelord :biology; ecology; hydrochory; plants; biological diversity; riparian; riparian zone; river collector hypothesis; ume river; vindel river; biologi; ekologi; hydrochori; växter; biologisk mångfald; strandzon; kantzon; river collector hypothesis; umeälven; vindelälven;

    Sammanfattning : The riparian zone is a changeable and species-rich habitat with important ecological functions that have long been affected by human activities such as hydropower and forestry. Rivers and their adjacent riparian zones also constitute a transport route for plant parts and seeds in a form of passive transport, called hydrochory, which can contribute to the establishment of plants or the preservation of diversity in the riparian zone. LÄS MER

  3. 2. Restaureringens effekt på öringpopulationen

    Kandidat-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Ola Carlström; Sebastian Dagman; [2022]
    Nyckelord :restaurering; flottning; öring; älv; bäck;

    Sammanfattning : Until the 1970s, rivers in Sweden were used for timber floating. In order for the floating to be as efficient as possible, with a minimum of timber getting stuck, many rivers were cleared. Large rocks and boulders were removed from the main channel and tributaries, backwaters and shallow areas were secluded. LÄS MER

  4. 3. 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

  5. 4. Intra and interhabitat migration in junvenile brown trout and Atlantic salmon in restored tributaries of the Vindelriver

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

    Författare :Matti Erikoinen; [2016]
    Nyckelord :migration; movement; temperature; pit-tag; electrofishing;

    Sammanfattning : Several techniques are used to sample juvenile salmonids in lotic environments. Electrofishing is by far the most commonly used method on the Scandinavian peninsula. LÄS MER

  7. 5. Effects of restoration on instream bryophyte communities : Monitoring of two different restoration techniques in the Vindel River system

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

    Författare :Lisa Sandberg; [2015]
    Nyckelord :Restoration; timber-floating; instream bryophytes; boreal river system; disturbance;

    Sammanfattning : Ecological restoration is the practice of assisting the recovery of a degraded, damaged or destroyed ecosystem. The aim of this study was to analyse the effects of two different restoration techniques on instream bryophyte abundance, species richness and diversity as well as community composition, in streams channelized for timber-floating. LÄS MER