Search for dissertations about: "soil carbon spatial degradation"

Showing result 1 - 5 of 11 swedish dissertations containing the words soil carbon spatial degradation.

  1. 1. Spatial variability linking carbon resource heterogeneity and microorganisms; causes and consequences

    Author : Niklas Törneman; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bakteriologi; virologi; mykologi; Environmental chemistry; Miljökemi; Mikrobiologi; mycology; virology; bacteriology; Microbiology; Ekologi; Ecology; Geostatistics; Microbial activity; Soil organic carbon; Microbial diversity; Biodegradation; Bioremediation; PAH; Spatial patterns;

    Abstract : Organic carbon and bacteria have a high variability at different scales in the soil, and organic carbon may be a limiting factor for growth of soil bacteria. Thus, it can be expected that these co-vary at different scales in the soil. READ MORE

  2. 2. Understanding the causes of spatial variation in pesticide sorption and degradation at the catchment scale

    Author : Abdul Ghafoor; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Intensive agricultural practices and use of pesticides, essential to achieve high crop yields, present particular risks to soil and water resources which sustain life. Degradation and sorption of pesticides in soils are both spatially variable and also among the most sensitive factors determining losses to surface water and groundwater. READ MORE

  3. 3. Northern peatland carbon biogeochemistry : the influence of vascular plants and edaphic factors on carbon dioxide and methane exchange

    Author : Mats Öquist; Bo Svensson; Joseph B. Yavitt; Linköpings universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Biogeokemi; Biologi; Autekologi; Klimatologi; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Abstract : The interest in carbon dynamics and the interactions between ecosystems and the atmosphere has increased during the last decade due to the postulated threat of anthropgenically induced global and climate change. Northern peatlands, with their large stores of organic carbon and long-term net accumulation of atmospheric carbon dioxide are key ecosystems in these interactions. READ MORE

  4. 4. Microbial life in boreal soils : on the availability and fate of carbon substrates for microbial activity in boreal soils

    Author : Javier Segura; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : The large pool of carbon (C) stored as soil organic matter (SOM) in soils of high-latitude ecosystems contains more organic C than all global vegetation and the atmosphere combined. Global climate change is expected to have especially pronounced effects in these ecosystems, and even small changes in the accumulation and decomposition of their soil C pool driven by heterotrophic microbial activity could profoundly affect atmospheric CO₂ levels and thus the global climate. READ MORE

  5. 5. Temporal and spatial dynamics in subarctic peat plateaus and thermokarst lakes

    Author : A. Britta K. Sannel; Peter Kuhry; Peter Jansson; Ian A. Brown; Serge Payette; Stockholms universitet; []
    Keywords : Peatlands; permafrost; subarctic; peat plateau; thermokarst lake; macrofossil analysis; carbon nitrogen ratio; peat accumulation; carbon accumulation; remote sensing; binary encoding; time-series analysis; Physical Geography; naturgeografi;

    Abstract : Permafrost peatlands are widespread at high northern latitudes and are important soil organic carbon reservoirs. A future warming in these areas, as suggested by global climate models, can cause thawing and increased ground subsidence (thermokarst), resulting in changes in surface hydrology and ecosystem functioning. READ MORE