Bacteria growth, enzyme activities and TEP during KOSMOS 2011 mesocosm experiment in the Raunefjord ...

• Main Authors: Endres, Sonja, Galgani, Luisa, Riebesell, Ulf, Schulz, Kai Georg, Engel, Anja, Dupont, Sam
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: DATE/TIME; Day of experiment; Sample code/label; Abundance per volume; Transparent exopolymer particles as Gum Xanthan equivalents per volume; Transparent exopolymer particles as Gum Xanthan equivalents per volume, std dev; Leucine aminopeptidase activity; pH; Chlorophyll a; Mesocosm experiment; Biological Impacts of Ocean Acidification BIOACID; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.857511; https://doi.pangaea.de/10.1594/PANGAEA.857511

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 physiology, organic matter cycling and marine biogeochemistry are still unresolved. We studied the effects of elevated seawater pCO2 on a natural plankton community during a large-scale mesocosm study in a Norwegian fjord. Nine Kiel Off-Shore Mesocosms for Future Ocean Simulations (KOSMOS) were adjusted to different pCO2 levels ranging initially from ca. 280 to 3000 µatm and sampled every second day for 34 days. The first phytoplankton bloom developed around day 5. On day 14, inorganic nutrients were added to the enclosed, nutrient-poor waters to stimulate a second phytoplankton bloom, which occurred around day 20. ... : Supplement to: Endres, Sonja; Galgani, Luisa; Riebesell, Ulf; Schulz, Kai Georg; Engel, Anja (2014): Stimulated Bacterial Growth under Elevated pCO2: Results from an Off-Shore Mesocosm Study. PLoS ONE, 9(6), e99228 ...