Essays about: "tundra"

Showing result 21 - 25 of 47 essays containing the word tundra.

  1. 21. Greenhoue gas flux over a 50-year post permafrost thaw gradient. Decomposition of soil organic carbon from the Swedish tussock tundra.

    University essay from Göteborgs universitet/Institutionen för geovetenskaper

    Author : Johan Martinelli; [2020-02-11]
    Keywords : greenhouse gas; permafrost;

    Abstract : As the globe is warming the extent of permafrost drastically decreases in the high latitudes. Upon thaw the stored soil organic carbon (SOC) undergoes rapid decomposition and is partly released as trace gases to the atmosphere. READ MORE

  3. 22. Feedback effects in the Arctic region and how they affect the global climate

    University essay from Lunds universitet/Miljövetenskaplig utbildning

    Author : Lotta Nyman; [2020]
    Keywords : Arctic warming; Arctic change; Climate feedback effect; Lower latitude weather; Arctic amplification; Permafrost; Earth and Environmental Sciences;

    Abstract : The Arctic is warming at a rate two to three times that of the global average. Although only covering a small area of the globe, it is a vital component of the climate system. Through climatic feedback effects the warming is enhanced, and risks leading to further climate change. READ MORE

  4. 23. Photo-chemical reactivity of dissolved organic carbon in subarctic lakes from northern Sweden

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Hani Younes; [2020]
    Keywords : Photo-reactivity; DOM; subarctic lakes; EEM-PARAFAC. Brownification; Earth and Environmental Sciences;

    Abstract : Dissolved organic matter (DOM) is the major absorber of sunlight in most natural waters and a critical component of the carbon cycle in aquatic systems. The photochemical decomposition of DOM can have a significant impact on the landscape-atmosphere carbon exchange. READ MORE

  5. 24. The role of wood ants (Formica rufa) in the Arctic tundra and how climate change may alter this role

    University essay from

    Author : Michael Meijer; [2020]
    Keywords : Wood ants; ants; mounds; climate change; arctic tundra; ecosystem; ecology; vegetation; arthropods;

    Abstract : In the Arctic tundra, wood ants play an important ecological role in aerating the soil, cycling nutrients, for seed dispersal and, as biological control by preying on forest pest insects during outbreaks. The increase in temperature, caused by climate change, is positively associated with ant abundance. READ MORE

  6. 25. Grazing Legacy Influence Nutrient Content and Dry Matter Digestibility of Five Reindeer Food Plants

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Oleksiy Hronskiy; [2020]
    Keywords : Nutrient content; N and C; reindeer; grazing; HMGs; tundra ecosystems;

    Abstract : Herbivores have a significant role in tundra ecosystem composition and processes. They can cause changes of vegetation composition and nutrient content that result in altered palatability of the vegetation and food availability for herbivores. READ MORE