Sökning: "DOC concentration"

Visar resultat 1 - 5 av 63 uppsatser innehållade orden DOC concentration.

  1. 1. Coupling between iron and humic substances in a land-sea transitional zone in the northern Baltic Sea

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

    Författare :Anna Osterman; [2023]
    Nyckelord :Iron; Humic substances; Dissolved organic carbon; Baltic Sea; Rivers;

    Sammanfattning : In marine ecosystems around the world, iron (Fe) is a well-studied and important trace element which has been found to stimulate phytoplankton and cyanobacteria growth, as well as limit nitrogen fixation and being essential for Legionella pneumophila which is known as the main cause of Legionnaires’ disease. Fe also contributes to the brownification of freshwater and has recently been documented to increase in concentration in rivers in Sweden. LÄS MER

  3. 2. Ecological impacts of dam removal in Swedish inland waters : Effects on water chemistry and fish demography

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

    Författare :Johanna Ekman; [2023]
    Nyckelord :biology; ecology; dam removal; Sweden; impact; inland waters; ecosystem; water chemistry; fish demography; Perca fluviatilis; European perch; biologi; ekologi; dammutrivning; Sverige; påverkan; inlandsvatten; ekosystem; vattenkemi; fiskdemografi; Perca fluviatilis; abborre;

    Sammanfattning : Dams play an important role in our society, but their negative impacts on aquatic ecosystems have led to a need for conservation efforts to mitigate the negative effects. In some instances, dam removal has been suggested to be the most economically and ecologically beneficial restoration method to improve longitudinal connectivity. LÄS MER

  4. 3. Kalknings påverkan och brunifiering av ytvatten i Västra Götalands län, Sverige : Drivande faktorer och trender

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

    Författare :Hanna Andersson; [2023]
    Nyckelord :Brownification; Surface waters; Acid deposition; Liming;

    Sammanfattning : For more than 45 years an extensive liming measure has taken place in the southwest of Sweden in Västra Götaland county. The goal with the liming is to improve the aquatic ecosystems and counteract the acidification that has occurred in a large part of catchments in this area. LÄS MER

  5. 4. Mercury in a Swedish landscape over 30 years : a thesis on mercury concentrations in different water-cathments in Krycklan and Degerö stormyr

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

    Författare :Ted Pettersson; Isak Haglund; [2023]
    Nyckelord :Atmospheric deposition; concentrations; dissolved organic carbon; mercury; methylmercury; peatlands; water-catchments;

    Sammanfattning : The purpose of this thesis is to examine trends in concentrations of total mercury (TotHg) and methylmer¬cury (MeHg) in water streams around Vindeln, Sweden, located northwest of Umeå. The relation¬ship between dissolved organic carbon (DOC) and TotHg were also examined in this thesis. LÄS MER

  7. 5. En undersökning av Murån : Brunifiering och orsak

    Kandidat-uppsats, Högskolan i Halmstad

    Författare :Johan Eliasson; [2022]
    Nyckelord :Brunifiering;

    Sammanfattning : Att vatten blir brunare, så kallad brunifiering är en trend som har pågått de senaste decennierna och har uppmärksammats mer och mer. Vad som gör ett vatten brunt är koncentrationen av vattenlösligt organiskt kol (DOC). Problemet med brunifiering är de många negativa konsekvenserna som brunifieringen orsakar. LÄS MER