Data for manuscript 'Ocean acidification of a coastal Antarctic marine microbial community reveals a critical threshold for CO2 tolerance in phytoplankton productivity'

• Other Authors: AADC (owner), AADC, DATA OFFICER (distributor), AADC, DATA OFFICER (custodian), AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith), Australian Antarctic Data Centre (publisher), Australian Antarctic Division (sponsor), DAVIDSON, ANDREW TIMOTHY (hasPrincipalInvestigator), DEPPELER, STACY LOUISE (collaborator), DEPPELER, STACY LOUISE (hasPrincipalInvestigator), DEPPELER, STACY LOUISE (author), Deppeler, S.L., Petrou, K., Schulz, K., Davidson, A.T., McKinlay, J., Pearce, I. and Westwood, K.J. (originator), MCKINLAY, JOHN (hasPrincipalInvestigator), PEARCE, IMOJEN (hasPrincipalInvestigator), SCHULZ, KAI (hasPrincipalInvestigator), WESTWOOD, KAREN JILLIAN (hasPrincipalInvestigator)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: biota; oceans; EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE; BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON; BIOLOGICAL CLASSIFICATION > BACTERIA/ARCHAEA; ORGANIC MATTER; ocean acidification; primary productivity; bacterial productivity; photophysiology; oxygen sensor spots; HPLC > High-Performance Liquid Chromatograph; LBLSC > Low Background Liquid Scintillation Counter; FLOW CYTOMETRY; CHNS/O ELEMENTAL ANALYZERS > Carbon; Hydrogen; Nitrogen Elemental Analyzers; PAM > PORTABLE FLUORESCENCE ANALYZERS; LICOR QUANTUM SENSOR; LABORATORY; FIELD INVESTIGATION; MINICOSM; ACE/CRC; AMD/AU; AMD; CEOS; GEOGRAPHIC REGION > POLAR; CONTINENT > ANTARCTICA > Davis Station; OCEAN > SOUTHERN OCEAN; Antarc*; Antarctic; Antarctica; East Antarctica; Ocean acidification; Prydz Bay; Southern Ocean
• Online Access: https://researchdata.edu.au/data-manuscript-ocean-phytoplankton-productivity/2816130

Progress Code: completed Statement: The minicosm experimental design measured the microbial community growth in six unreplicated fCO2 treatments. Therefore, sub-samples from each minicosm were within-treatment pseudoreplicates and thus, results of statistical analysis must be interpreted conservatively. Purpose One community-level study has been performed in Antarctic waters on a natural coastal marine microbial community at Davis Station, Antarctica during the 2008/09 summer season. This study in Prydz Bay, East Antarctica reported declines in primary and bacterial productivity when CO2 concentration exceeded 780 micro atm. A shift in community composition was also observed, with increased abundance of small picoeukaryotes and a decline in large diatoms. Based on the results of this previous study, a natural community of Antarctic marine microbes from Prydz Bay, East Antarctica were exposed to a range of CO2 concentrations in 650 l minicosms to simulate possible future ocean conditions up to the year ∼2200. Productivity was examined at CO2 concentrations between 343 to 1641 μatm to determine whether tipping points existed, above which CO2 concentration reduced rates of primary productivity, bacterial productivity, and the accumulation of particulate organic matter (POM). Photophysiological assays were also performed to assess whether possible mechanisms driving changes in the phytoplankton community could be determined. This data set was collected from a ocean acidification minicosm experiment performed at Davis Station, Antarctica during the 2014/15 summer season. It includes: - description of methods for all data collection and analyses. - marine microbial community data; Chlorophyll a concentration, particulate organic matter concentration (carbon and nitrogen), bacterial cell abundance. - phytoplankton primary productivity data; 14C-sodium bicarbonate incorporation raw data (decays per minute: DPM) and modelled productivity from photosynthesis versus irradiance (PE) curves, O2-evolution derived net ...