Sökning: "Biogeochemistry"

Visar resultat 11 - 15 av 20 uppsatser innehållade ordet Biogeochemistry.

1. 11. Production and biodegradability of dissolved organic carbon from dIfferent litter sources

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

   Författare :Carlos Arellano; [2015]
   Nyckelord :biogeochemical cycles; physical geography and ecosystem analysis; dissolved organic carbon; carbon cycle; soil biogeochemistry; Earth and Environmental Sciences;

   Sammanfattning : The movement of carbon on Earth is based on exchange between pools that represent carbon in different physical forms, differing in chemical composition, structure and function. Dissolved organic carbon plays an important role in ecosystems because of its mobility, which can be relatively high in saturated soils, and because it is the most available fraction of organic matter for microorganisms in soil, being particularly active in microbial degradation processes through soil profile. LÄS MER

3. 12. Impact of photo-chemical processing of dissolved organic carbon on the bacterial respiratory quotient in aquatic ecosystems

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

   Författare :Lina Allesson; [2015]
   Nyckelord :bacterioplankton respiration; physical geography; biogeochemistry; photo-oxidation; degradation; nutrients; Earth and Environmental Sciences;

   Sammanfattning : Dissolved organic carbon (DOC) enters inland waters from the surrounding terrestrial ecosystems, and is assimilated by bacterioplankton, mineralizing it to carbon dioxide (CO2). This bacterial respiration (BR) is an important part of carbon processing in freshwater, but it is also a process of global significance; in oceans and inland waters combined, BR is probably the largest single sink of organic carbon on Earth. LÄS MER

4. 13. Logging impacts on catchment biogeochemistry: A review : with emphasis on northern boreal ecosystems

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

   Författare :Daniel Karlsson; [2014]
   Nyckelord :Boreal forest; clear-cutting; nutrients; lake ecosystems; physical parameters;

   Sammanfattning : The impacts of current forest management methods on surface water quality, especially in northern parts of Sweden, are largely unexplored. In this review reports linked to logging impacts on catchment biogeochemistry, (with special emphasis on boreal ecosystems) has been assessed. LÄS MER

5. 14. Modeling of the Nitrogen Cyclein the Sediments of the Western Gotland Basin, Baltic Sea

   Master-uppsats, KTH/Industriell ekologi

   Författare :Kamilia Muhanova; [2009]
   Nyckelord :eutrophication; the Baltic Sea; the Western Gotland Basin; environmental modeling; sediment; nitrogen cycle;

   Sammanfattning : Modeling of the nitrogen cycling in the sediments of the Baltic Sea is the major objective of thepresent study. A model of the nitrogen cycling in the sediment of the Western Gotland Basinwas developed. LÄS MER

7. 15. Årstidsdynamik för kvicksilver i ett sövattensediment

   L3-uppsats, SLU/Dept. of Forest Ecology and Management

   Författare :Anna Karlsson; [2008]
   Nyckelord :kvicksilver; metylering; sediment; sjöar;

   Sammanfattning : The limit for mercury in fish, set by health authorities, is exceeded in about half of the lakes in Sweden. Methyl mercury (MeHg) is the most toxic form of mercury and accumulates in fish. LÄS MER