Sökning: "in-stream"

Visar resultat 11 - 15 av 36 avhandlingar innehållade ordet in-stream.

  1. 11. Effects of fine woody debris on juvenile brown trout (Salmo trutta) and drifting invertebrates

    Författare :Åsa Enefalk; Eva Bergman; Siân Griffiths; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; brown trout; juvenile; stream; woody debris; invertebrates; fine woody debris; Biology; Biologi;

    Sammanfattning : In boreal forest streams, woody debris is an important habitat component. Stream invertebrates and salmonids such as brown trout benefit from in-stream wood. LÄS MER

  3. 12. Function and dynamics of woody debris in boreal forest streams

    Författare :Niklas Dahlström; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Boreal forest; CPOM; CWD; forest management; geomorphology; LWD; riparian forest; retention; residence time; streams; Sweden; woody debris; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : The work in this thesis deals with (1) the effects of woody debris on stream channel morphology and retention of organic material, and (2) the dynamics of woody debris and its relation to riparian forest history and composition. The studied stream reaches are situated in mature, productive forests in the boreal zone of Sweden. LÄS MER

  4. 13. Transformation of Micropollutants in the Hyporheic Zone

    Författare :Malte Posselt; Jonathan P. Benskin; Michael Radke; Merle Plassmann; Magnus Breitholtz; Ian Cousins; Gudrun Massmann; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; micropollutants; hyporheic zone; biodegradation; bacteria; pharmaceuticals; transformation products; LC-MS MS; macrophytes; bedforms; suspect screening; mesocosm; flume; river; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Hyporheic zones (HZs) are reactive transition regions between rivers and aquifers which are thought to play an important role in the attenuation of micropollutants. Micropollutants are chemical substances such as pharmaceuticals, industrial chemicals or personal care products that are found in trace concentrations in the environment and that can be harmful to organisms. LÄS MER

  5. 14. Biophysical controls on CO2 evasion from Arctic inland waters

    Författare :Gerard Rocher-Ros; Reiner Giesler; Ryan A. Sponseller; Ann-Kristin Bergström; Paul del Giorgio; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Inland waters; carbon dioxide; organic carbon; inorganic carbon; arctic; CO2 evasion; DOC; DIC; streams; metabolism; oxygen; Limnology; limnologi;

    Sammanfattning : CO2 evasion to the atmosphere from inland waters is a major component of the global carbon (C) cycle. Yet spatial patterns of CO2 evasion and the sources of C that fuel evasion remain poorly understood. LÄS MER

  7. 15. Land use effects on ecological linkages between small streams and their surrounding terrestrial habitats

    Författare :Peter Carlson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Adult aquatic insects are important vectors for aquatic transfers to terrestrial consumers and an integral component of riparian and terrestrial food webs. Incorporation of aquatic subsidies into terrestrial food webs depends heavily on the dispersal and life history traits of aquatic insects. LÄS MER