The effect of global climate change on Antarctic marine diatomsEntry ID: ASAC_2302
Abstract: Antarctic marine diatoms are sensitive to environment change. This project will determine the environmental niches occupied by key diatom species in Antarctic sediments. This will allow climate changes in the past to be interpreted from Holocene sediments and future changes in diatom biogeography to be predicted.
Environmental manipulation and competition experiments using diatoms will identify ... the response of key taxa to environment modification. Understanding the environmental factors governing their distribution and natural variability will provide a basis to interpret palaeo-environment records, and allow predictions how this temperature-sensitive ecosystem will respond to future change.
Diatoms for the experiments were collected in 2002 (Aurora Australia, Voyage 1) and 2003 (Aurora Australis, Voyage 1). On each occasion water from the ship's online seawater tap was filtered through a 20 micrometre plankton net for up to one hour into a sample jar. A portion of the sample was preserved in lugol's iodine for later phytoplankton analysis, and the rest of the sample maintained alive in the dark in seawater at a constant low temperature. The live sample is maintained at the AAD for culturing and environment manipulation and competition experiments.
Twenty-two water samples were collected from 24/10/02 to 11/11/02, in open seawater between 53 degrees 50 degrees S and 65 degrees 50 degrees S. At each site, the following were recorded from the ship's data logger: latitude, longitude, date, UCT time, local time, water depth, salinity, water temperature, chlorophyll A, UV radiation, and conductivity.
Data Set Citation
Dataset Originator/Creator: McMinn, A. and Taylor, F.
Dataset Title: The effect of global climate change on Antarctic marine diatoms
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2004-05-24
Dataset Publisher: Australian Antarctic Data Centre
Dataset DOI: doi:10.4225/15/574BA55EC3071Online Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 2002-10-24Stop Date: 2002-11-11
ATMOSPHERE > ATMOSPHERIC RADIATION > ULTRAVIOLET RADIATION
OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > CONDUCTIVITY
OCEANS > SALINITY/DENSITY > SALINITY
BIOLOGICAL CLASSIFICATION > PROTISTS > DIATOMS
BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE
BIOLOGICAL CLASSIFICATION > PLANTS > ALGAE
BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS
BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON
BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON
OCEANS > OCEAN CHEMISTRY > PIGMENTS > CHLOROPHYLL
Access Constraints The dataset is available for download from the provided URL.
Presently, diatom data are not yet available - only underway data collected by the ship's data logger.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_2302 when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 2 kb
Distribution Format: csv
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2002-07-02
Last DIF Revision Date: 2017-08-24