Essays about: "allochthonous carbon"

Showing result 1 - 5 of 6 essays containing the words allochthonous carbon.

  1. 1. Effects of allochthonous organic matter and iron on plankton community functioning and annual carbon cycling in a subarctic estuary under winter conditions.

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

    Author : Hendricus Verheijen; [2016]
    Keywords : C cycling; plankton respiration; Fe; Öre estuary;

    Abstract : High winter respiration has been observed in a subarctic estuary with high levels of organic matter inputs, while winter is generally thought to be a non-productive season. We constructed an oxygen and carbon budget of the system to validate the high respiration rate, including the resulting low production-to-respiration ratio, and to identify important carbon and energy sources. READ MORE

  2. 2. Tracing the source of colourless carbon in an arctic lake on SW Greenland : Insights of organic matter origin from hydrogen isotope analyses of samples prepared using steam equilibration

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

    Author : Bror Holmgren; [2016]
    Keywords : Søndre Strømfjord; dissolved organic carbon; stable isotopes; steam equilibration;

    Abstract : Lakes play an important role in the global carbon (C) cycle as they process carbon from terrestrial (allochthonous) and within lake (autochthonous) sources and may store C over long periods of time. Some arctic lakes contain high concentrations of dissolved organic carbon (DOC) that does not absorb light and thus remains colourless. READ MORE

  3. 3. Sources of organic carbon fueling carbon emissions from tropical reservoirs

    University essay from

    Author : Gabriella Villamor Saucedo; [2016]
    Keywords : tropical reservoirs; decomposition; autochthonous carbon; allochthonous carbon; tropical macrophytes; methanogenesis; tropiska vattenkraftsmagasin; metangasproduktion; autoktont OM; alloktont OM; tropiska makrofyter;

    Abstract : For a sustainable energy supply, it is of importance to be aware about the environmental impacts from the different energy sources. Hydroelectric reservoirs in tropical areas have been found to emit more greenhouse gases (GHG) than reservoirs from boreal regions. READ MORE

  4. 4. Resource use by macroinvertebrates within boreal stream food webs

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

    Author : Emelie Landström; [2015]
    Keywords : Allochthonous; Autochthonous; Food webs; Boreal; Streams; Deuterium; Carbon;

    Abstract : Stream food webs are supported by carbon produced within the stream (autochthonous) and from terrestrial environments (allochthonous). Allochthonous carbon (C) inputs are assumed to be the dominant C source supporting food webs within small streams, but few direct estimates of resource use in small streams have been made, especially in boreal streams. READ MORE

  5. 5. Impact of vegetation on soil and lake DOC and δ13C

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

    Author : Stina Eriksson; [2009]
    Keywords : vegetation; soil; interactions;

    Abstract : The climate change is expected to affect especially alpine areas negatively, replacing the alpine flora with subalpine forest. The understanding of how vegetation influences total organic carbon (TOC) in soil, streams and lakes in alpine and subalpine areas will lead to a better understanding of the effects of climate change, and will also increase the knowledge of the ecotone as a whole. READ MORE