Sökning: "Freshwater systems"

Visar resultat 1 - 5 av 88 uppsatser innehållade orden Freshwater systems.

  1. 1. Changes in lake-water organic carbon over recent centuries in northern Sweden, Västerbotten : Past and present mechanisms, and the potential implications on mercury

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

    Författare :Magnusson Petter; [2023]
    Nyckelord :Lake-water TOC; Summer forest farming; traditional agriculture; land-use; geochemistry; mercury;

    Sammanfattning : Due to the current increase in lake water total organic carbon (LW-TOC), many studies have investigated the long-term dynamics using lake sediments. However, these have mainly been focused on Sweden’s south and south-central parts. LÄS MER

  3. 2. More Fish, more Mahasoa? A Quantitative Analysis of Food Security & Poverty Reduction in Rural Small-scale Aquaculture in Madagascar

    Master-uppsats, Lunds universitet/Ekonomisk-historiska institutionen

    Författare :Gianna Laura Angermayr; [2023]
    Nyckelord :Madagascar; Small-scale Aquaculture; Pond Aquaculture; Integrated Rice-Fish Farming; Community Well- being; Poverty Reduction; Food Security.; Business and Economics;

    Sammanfattning : The role of food-producing sectors such as agriculture and aquaculture in the development process is debated and while some consider industrial production to be the answer, others suggest that small-scale production can also make contributions to poverty reduction and food security. This thesis aims to shed light on these relationships by performing quantitative analyses of the small-scale freshwater aquaculture sector in six regions of Madagascar. LÄS MER

  4. 3. Utvärdering av artificiell syresättning i syrefria bottenvatten och modellering av fjärden Slätbaken

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Arvid Jonsson; [2023]
    Nyckelord :Artificial oxygenation; Geo-engineering; oxygenation; Slätbaken; mass-balance modelling; oxygen demand; Artificiell syresättning; syresättning; syrgasnedpumpning; Slätbaken; massabalansmodellering; syrebehov;

    Sammanfattning : Östersjön är idag det system med störst utbredning av syrefattiga eller syrefria bottnar i hela världen. Problemet har uppstått som följd av den massiva näringsbelastning från de kringliggande länderna som pågått sedan industrialiseringen intensifierades på 1900-talet. LÄS MER

  5. 4. Habitatpreferens hos Anguilla anguilla: makrofyters påverkan på gulålars habitatval under dag och natt

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

    Författare :Hannah Wiklund; [2023]
    Nyckelord :European eel; Anguilla anguilla; Yellow eel; Habitat preference; Macrophytes; Substrate; Europeisk ål; Anguilla anguilla; Gulål; Habitatpreferens; Makrofyter; Substrat;

    Sammanfattning : Aquatic vegetation and different substrates can be important factors for fish habitat. The European eel (Anguilla anguilla) is threatened by habitat loss in freshwater systems during its life stage as a yellow eel. To conserve the species, restoration measures and increased knowledge about its preference for benthic habitats are needed. LÄS MER

  7. 5. Metagenomic insights into AMR distributions in freshwaters and soils

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Jay Håkansson; [2023]
    Nyckelord :AMR; metagenomics; freshwater; microbial ecology; soil; antimicrobial resistance;

    Sammanfattning : Antimicrobial resistance (AMR) is rapidly becoming a public health issue, as more and more infectious bacteria become resistant to our known antibiotics. Suggested reasons for the proliferation of these strains are misuse and overuse of antimicrobials, especially on an industrial level, in agriculture, livestock and aquaculture. LÄS MER