Search for dissertations about: "Bacterioplankton production"

Showing result 1 - 5 of 14 swedish dissertations containing the words Bacterioplankton production.

2. 1. Allochthonous and autochthonous carbon sources of lake bacterioplankton

   Author : Emma Kritzberg; Enhet akvatisk ekologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Marinbiologi; limnologi; akvatisk ekologi; aquatic ecology; marine biology; Hydrobiology; bacterial community composition; bacterial growth efficiency; bacterioplankton; carbon subsidy; dissolved organic carbon; limnology;

   Abstract : Organic substrates for pelagic bacteria are derived from dissolved organic carbon (DOC) in the water column that originates either from primary production from within the lake itself (autochthonous), or import of organic matter from the terrestrial watershed (allochthonous production). This thesis addresses the utilization of allochthonous versus autochthonous carbon (C) sources by lake bacterioplankton. READ MORE

4. 2. Riverine sources of bioreactive macroelements and their impact on bacterioplankton metabolism in a recipient boreal estuary

   Author : Ana Soares; Institutionen för naturgeografi och ekosystemvetenskap; []
   Keywords : Dissolved organic carbon; DOC bioreactivity; nutrient bioavailability; dissolved organic matter; bacterioplankton production; bacterial respiration; aquatic ecology;

   Abstract : The loading of terrestrially derived macroelements, such as dissolved organic carbon (DOC), total nitrogen (N), and total phosphorus (P), to inland and estuarine waters is increasing in the northern hemisphere. Thesemacroelements often limit heterotrophic bacterioplankton metabolism (production and respiration), which in turn influence food web structures, exchange of greenhouse gases between the atmosphere and aquatic systems and oxygen consumption in estuarine ecosystems. READ MORE

5. 3. Bacterioplankton in the Baltic Sea : influence of allochthonous organic matter and salinity

   Author : Daniela Figueroa; Agneta Andersson; Laura Alonso-Saéz; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bacterioplankton production; bacterial community structure; allochthonous organic matter; carbon utilization; dissolved organic carbon composition; bacterioplankton ecological function; bacterial diversity; bacterial network; Baltic Sea estuary; food web; climate change.; Environmental Science; miljövetenskap;

   Abstract : Climate change is expected to increase the precipitation ~30% in higher latitudes during the next century, increasing the land runoff via rivers to aquatic ecosystems. The Baltic Sea will receive higher river discharges, accompanied by larger input of allochthonous dissolved organic matter (DOM) from terrestrial ecosystems. READ MORE

6. 4. Attached Bacterial Communities in Lakes – Habitat-Specific Differences

   Author : Ann-Louise Haglund; Lars Tranvik; Helmut Fischer; Bengt Boström; Erik Törnblom; Paul del Giorgio; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; bacteria; freshwater; sediment; epiphyton; bacterioplankton; metabolically active; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Abstract : For many years, the importance of microorganisms attached to surfaces in littoral zones and wetlands has been disregarded when describing aquatic ecosystem dynamics. Supporting evidence is scarce but convincing that these microbial communities are not only very productive but can often serve as major regulators of nutrient and carbon dynamics in many freshwaters. READ MORE

7. 5. Bacterioplankton production and biomass in two lakes of different trophic status : Responses to inorganic nutrients, organic carbon, and other planktonic biota

   Author : Katarina Vrede; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi; Biology; Biologi; limnologi; Limnology;

   Abstract : Bacterioplankton growth is affected by physical, chemical, and biological factors. Theavailability of energy and carbon sources, as well as inorganic nutrients, are of specialinterest when studying regulation of heterotrophic bacterioplankton in lakes. READ MORE