Sökning: "labile dissolved organic matter"
Visar resultat 1 - 5 av 8 avhandlingar innehållade orden labile dissolved organic matter.
1. Molecular-level dissolved organic matter dynamics in lakes : Constraints on reactivity and persistence
Sammanfattning : Dissolved organic matter (DOM) is a central component of the global carbon cycle. Thus, small changes to the amount of DOM imported, processed and produced within lakes can have a large effect on regional carbon budgets. In addition to being a vital energy source at the base of the aquatic food web, DOM is physico-chemically reactive. LÄS MER
2. Characterisation of natural dissolved organic matter with liquid chromatography and high resolution mass spectrometry
Sammanfattning : Dissolved organic matter (DOM) is one of the most heterogeneous and complex mixture on Earth. DOM plays a crucial role in biogeochemical processes on the global scale and it is essential to sustain and regulate the biological processes in aquatic ecosystems. LÄS MER
3. Molecular mechanisms involved in prokaryotic cycling of labile dissolved organic matter in the sea
Sammanfattning : Roughly half of the global primary production originates from microscopic phytoplankton in marine ecosystems, converting carbon dioxide into organic matter. This organic matter pool consists of a myriad of compounds that fuel heterotrophic bacterioplankton. LÄS MER
4. Dissolved organic matter across terrestrial and aquatic systems : sources, chemistry and microbial processing
Sammanfattning : The movement of DOM from terrestrial to aquatic systems is a globally significant flux affecting both carbon sequestration and CO2 emissions. Here, DOM dynamics were investigated in terrestrial and aquatic systems within the context of this carbon flux. LÄS MER
5. Utilization of terrestrially derived dissolved organic nitrogen by aquatic bacteria
Sammanfattning : I investigated the bacterial utilization of terrestrially derived dissolved organic nitrogen (DON) in aquatic ecosystems, and assessed the potential role of river-born DON in marine eutrophication. To determine the bioavailability of DON, I developed a bioassay employing N-limited bacterial regrowth cultures, which were calibrated with additions of inorganic nitrogen. LÄS MER