TemperateReefBase Geonetwork Catalogue
Antarctic diatom silicification diminishes under ocean acidification
This data set was collected during an ocean acidification mesocosm experiment performed at Davis Station, Antarctica during the 2014/15 summer season. It includes:
- description of methods for all data collection and analyses.
- diatom cell volume
- bulk silicification
- species specific silicification via fluorescence microscopy
- bulk community Fv/Fm on day 12
- single-cell PAM fluorometry data (maximum quantum yield of PSII: Fv/Fm)
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. Diatom silica precipitation rates were examined at CO2 concentrations between 343 to 1641 micro atm, measuring both the total diatom community response and that of individual species, to determine whether ocean acidification may influence future diatom ballast and therefore alter carbon and silica fluxes in the Southern Ocean.
Described and analysed in:
Antarctic diatom silicification diminishes under ocean acidification (submitted for review)
Methods described in:
Antarctic diatom silicification diminishes under ocean acidification (submitted for review)
Location: Prydz bay, Davis Station, Antarctica (68 degrees 35'S, 77 degrees 58' E)
Date: Summer 2014/2015
Worksheet descriptions:
Bulk silicification - raw data
Measured total and incorporated biogenic silica using spectrophotometer for all tanks on day 12 after 24 h incubation with PDMPO - raw data
Bulk Fv/Fm - dark-adapted maximum quantum efficiency of PSII (Fv/Fm) on whole community - raw data
Measured Fv/Fm of individual cells from 3 mesocosm tanks.
Single-cell silicificiation, Fluorescence microscopy - raw data
Measured autofluorescence and PDMPO fluorescence of individual diatoms from 6 mesocosm tanks
Single-cell PAM, dark-adapted maximum quantum efficiency of PSII (Fv/Fm) - raw data
Measured Fv/Fm of individual cells from 3 mesocosm tanks.
Cell volume
Calculated cell volume (um3) of 7 species from minicosm tanks 1 and 6 - raw data
Abbreviations:
Fv/Fm Maximum quantum yield of PSII
PDMPO 2-(4-pyridyl)-5-((4-(2-dimethylaminoethylaminocarbamoyl)methoxy)phenyl)oxazole
Tant Thalassiosira antarctica
DiscLg Large Discoid centric diatoms
Stella Stellarima microtrias
Chaeto Chaetoceros spp.
Prob Proboscia truncata
Pseu Pseudonitzschia turgiduloides
FragLg Fragilariopsis cylindrus / curta
Centric Large Discoid centric diatoms
LargeThalassiosira Large Discoid centric diatoms
Simple
Identification info
- Alternate title
- Antarctic diatom silicification diminishes under ocean acidification
- Date (Publication)
- 2019-07-10
- Edition
- 1
- Citation identifier
-
Dataset DOI
- Title
- Information and documentation - Digital object identifier system
- Date (Publication)
- 2012-04-23
- Citation identifier
- ISO 26324:2012
- Citation identifier
- doi:10.26179/5c3e745a9b071
Originator
Publisher
Principal investigator
Collaborator
- Name
- CAASM Metadata
- Purpose
- Based on the results of a 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 mesocosms to simulate possible future ocean conditions up to the year ∼2200. Diatom silica precipitation rates were examined at CO2 concentrations between 343 to 1641 micro atm, measuring both the total diatom community response and that of individual species, to determine whether ocean acidification may influence future diatom ballast and therefore alter carbon and silica fluxes in the Southern Ocean.
- Status
- Completed
Custodian
- Topic category
-
- Biota
- Oceans
- Environment
Extent
))
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 2014-11-19 2015-01-14
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 2017-06-01 2018-06-30
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS
- EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE
- Keywords
-
- SILICIFICATION
- CARBON CYCLING
- DIATOMS
- OCEAN ACIDIFICATION
- MESOCOSM
- MINICOSM
- NASA/GCMD Earth Science Keywords
-
- SPECTROPHOTOMETERS
- PAM > PORTABLE FLUORESCENCE ANALYZERS
- FLUOROMETERS
- FLUORESCENCE MICROSCOPY
- Computer > Computer
- NASA/GCMD Earth Science Keywords
-
- MODELS
- FIELD INVESTIGATION
- FIELD SURVEYS
- LABORATORY
- NASA/GCMD Earth Science Keywords
-
- AMD/AU
- AMD
- CEOS
- NASA/GCMD Earth Science Keywords
-
- GEOGRAPHIC REGION > POLAR
- CONTINENT > ANTARCTICA > DAVIS STATION
- OCEAN > SOUTHERN OCEAN > PRYDZ BAY
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- These data are publicly available for download from the provided URL.
Resource constraints
- File type
- Portable Network Graphic
- Title
- Attribution 4.0 International (CC BY 4.0)
- Website
-
https://creativecommons.org/licenses/by/4.0/legalcode
Legal code for Creative Commons by Attribution 4.0 International license
- Use constraints
- licence
- Other constraints
- This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4026_Silicification_CO2 when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
Distributor
- Fees
- Free
- Planned available datetime
- 2019-07-10T00:00:00
- Units of distribution
- kb
- Transfer size
- 152
- Distribution format
-
- Excel
- OnLine resource
-
GET DATA
Download the dataset
- OnLine resource
-
PROJECT HOME PAGE
Public information for AAS project AAS_4026
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset.
Resource lineage
- Statement
- No problems were encountered with data collection. The six level fCO2 gradient approach meant that our data could be analysed using a regression model, allowing us to identify functional relationships between our fCO2 treatment and our response variables. Gradient designs are more effective at uncovering underlying responses patterns to environmental drivers, improving interpolation potential and generally deliver more useful quantitative information for models.
- Hierarchy level
- Dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2019-01-15 - record created by Katherina Petrou. 2019-07-10 - record updated by Dave Connell to publicly release the data.
Metadata
- Metadata identifier
- string/AAS_4026_Silicification_CO2
- Language
- English
- Character encoding
- UTF8
Author
Sponsor
Owner
- Title
- Parent Metadata Record
- Citation identifier
- AAS_4026_Ocean_Acidification_Marine_Microbes_Parent
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- e47966c2-12c0-4f85-b96a-85803469ddd0
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2019-07-10T16:14:37
Identifier
- Description
- metadata.extraction_date
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 8.6
- Metadata linkage
-
http://data.aad.gov.au/metadata/records/AAS_4026_Silicification_CO2
Point of truth for the metadata record
- Date info (Creation)
- 2019-01-15T00:00:00
- Date info (Last Update)
- 2019-07-10
Metadata standard
- Title
- ISO 19115-3
- Edition
- 2014
- Other citation details
- Version 1
- Title
- DIF to ISO 19115-1 Profile
Overviews
Spatial extent
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