Response of marine viral populations to a nutrient induced phytoplankton bloom at different pCO2 levels

Marine viral populations detected during a nutrient induced phytoplankton bloom at elevated pCO2 levels

Coupling of heterotrophic bacteria to phytoplankton bloom development at different pCO2 levels: a mesocosm study

The predicted rise in anthropogenic CO2 emissions will increase CO2 concentrations and decrease seawater pH in the upper ocean. Recent studies have revealed effects of pCO2 induced changes in seawater chemistry on a variety of marine life forms, in particular calcifying organisms. To test whether the predicted increase in pCO2 will directly or indirectly (via changes in phytoplankton dynamics) ...

Stimulated Bacterial Growth under Elevated pCO2: Results from an Off-Shore Mesocosm Study

Marine bacteria are the main consumers of freshly produced organic matter. Many enzymatic processes involved in the bacterial digestion of organic compounds were shown to be pH sensitive in previous studies. Due to the continuous rise in atmospheric CO2 concentration, seawater pH is presently decreasing at a rate unprecedented during the last 300 million years but the consequences for microbial...

Effects of increased atmospheric CO2 on small and intermediate sized osmotrophs during a nutrient induced phytoplankton bloom

We report the transient population dynamic response of the osmotrophic community initiated by a nutrient pulse in mesocosms exposed to different pCO2 levels. Differences in phytoplankton and heterotrophic bacteria abundances associated with the CO2 treatment are also described. Coastal seawater was enclosed in floating mesocosms (27 m3) and nutrients were supplied initially in order to stimulat...

Availability of phosphate for phytoplankton and bacteria and of glucose for bacteria at different pCO2 levels in a mesocosm study

Availability of phosphate for phytoplankton and bacteria and of glucose for bacteria at different pCO2 levels were studied in a mesocosm experiment (PeECE III). Using nutrient-depleted SW Norwegian fjord waters, three different levels of pCO2 (350μatm: 1×CO2; 700μatm: 2×CO2; 1050μatm: 3×CO2) were set up, and nitrate and phosphate were added at the start of the experiment in order to induce a ph...