Sökning: "soil respiration"

Visar resultat 21 - 25 av 67 uppsatser innehållade orden soil respiration.

  1. 21. Emission of methane from tree stems in the Amazon basin : A study to investigate short temporal and spatial variability of methane emission of tree stems in the Amazon basin

    Kandidat-uppsats, Linköpings universitet/Tema Miljöförändring

    Författare :Magdalena Lindgren; Ida Pehrson; [2018]
    Nyckelord :Methane; tree stems; greenhouse gas; gas exchange; carbon cycle; seasonally flooded forests; short temporal variability; spatial variability; Amazon basin;

    Sammanfattning : It is well known that methane (CH4) is emitted from soil, water and wetlands under anaerobic conditions through methanogenesis. CH4 is the final product of the anaerobic respiration of the microorganism methanogen. LÄS MER

  3. 22. The influence of soil management on soil health : an on-farm study

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Soil and Environment

    Författare :Hanna Williams; [2018]
    Nyckelord :crop diversity; soil health assessment; indicator; soil quality; ecosystem services;

    Sammanfattning : The capacity of a soil to provide ecosystem services without negative impacts on the environment is defined as soil health. Healthy soils are a fundamental resource for agricultural production and our ability to feed a growing global population. We must therefore increase our understanding of how soil health is affected by soil management. LÄS MER

  4. 23. Estimation of Carbon Dioxide emissions from forest soils based on CO2 concentrations

    Magister-uppsats, Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Författare :Dennis Dennis Wilson; [2017]
    Nyckelord :Key Words: Soil Concentration; Soil CO2 production; Soil Respiration; Seasonal variation.;

    Sammanfattning : Forest soil is an important source of atmospheric CO2. Emission of CO2 from soil is the result of respiration of plant roots and soil organisms (Autotrophic and Heterotrophic respiration). This soil CO2 emission has a variation throughout the year with maximum emissions being in the summer. LÄS MER

  5. 24. Shifts within the carbon cycle in response to the absence of keystone herbivore Ovibos moschatus in a high arctic mire

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Joel White; [2017]
    Nyckelord :vegetation; carbon; wetland.; methane; Arctic; Physical Geography Ecosystem Science; herbivory; Earth and Environmental Sciences;

    Sammanfattning : Tundra ecosystems are generally recognized as globally important carbon sinks, yet the knowledge on threats to such ecosystems is narrow. Climate change is predicted to reduce the number of muskox (Ovibos moschatus) in the arctic, it is therefore essential to understand the effect herbivores induce on the arctic ecosystem. LÄS MER

  7. 25. Emissioner av växthusgaservid gödsling av granungskog isödra Sverige

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

    Författare :Magnus Axelsson; [2017]
    Nyckelord :Metanemissioner; Lustgasemissioner; Behovsanpassad gödsling; Kolbalans; BAG;

    Sammanfattning : Behovsanpassad gödsling (BAG) ökar skogens tillväxt, vilket kan ha en positivinverkan på kolbalansen. För att öka vår förståelse av vilken effekt gödslingsdoshar på växthusgasutsläpp, har denna studie undersökt respirationen i engranungskog på fastigheten Toftaholm (57°0'N; 14°3'E) med sandning morän ochfrisk markfuktighet, med främsta fokus på emissionerna från lustagas och metan. LÄS MER