The fate of primary production in Antarctic sea ice: the role of metazoan grazers.

Crustaceans are an important component of the Antarctic marine ecosystem. Large numbers live in or close to the sea-ice cover, using it as a refuge from predation and a source of food. However, the impact of these animals on algae that grows in the sea ice is unknown. This study is examining the diets and grazing rates of crustaceans in the Antarctic sea-ice ecosystem. These results will aid our understanding of the fate of algal production in sea-ice and will enable the construction of realistic carbon budgets for this ecosystem.


This project was commenced in July 2002. A five-week voyage was undertaken on the RV Aurora Australis in October and November 2002, in the vicinity of the Mertz Glacier. Pack ice cores and sub-ice water samples were collected from 8 locations, with 3 to 5 samples of each type collected per site. The cores were sectioned in the field, melted and treated for further analysis. All samples were either preserved or frozen, depending on future requirements, and returned to Australia. Sea ice cores were processed for a range of analyses including microscopy, lipid class and fatty acid determination and stable isotope analysis. A physical description of the pack ice environment (ice type, ice thickness, snow cover, temperature profiles, salinity profiles) was also compiled.


A second sampling of the pack ice occurred in Sept-Oct 2003. To date, the salinity and temperature profiles of the pack ice cores have been described and a database compiled of the physical description of the region. A large number of samples (10 sites; 5 ice/water/animal samples per site) was collected and analysis has begun of stable isotopic signatures, fatty acids, chlorophyll a and species identifications. Crustaceans have been sorted under the microscope and initial descriptions of gut contents begun.


The third successful sampling trip was to the fast ice surrounding Davis Station during the 2003/04 summer. Two sites were sampled regularly, with a full suite of analyses undertaken. This will provide a temporal component to the project to complement the spatial approach used in the pack ice. Analysis of the fast ice samples is ongoing.


Two more sampling trips were carried out during the 2004/05 season. The first in the pack ice offshore from Casey and the second in the fast ice at Casey. The same suite of analyses as listed above was carried out and analyses are ongoing.


The download file contains five excel spreadsheets, as well as a word document which further explains data collection.

Simple

Identification info

Alternate title
The fate of primary production in Antarctic sea ice: the role of metazoan grazers.
Date (Publication)
2012-12-20
Edition
1

Originator

Swadling, K.

Publisher

Australian Antarctic Data Centre

Principal investigator

SWADLING, KERRIE
School of Zoology
University of Tasmania
GPO BOX 252-05
Hobart
Tasmania
7001
Australia

Collaborator

SWADLING, KERRIE
School of Zoology
University of Tasmania
GPO BOX 252-05
Hobart
Tasmania
7001
Australia
Name
CAASM metadata
Website
https://data.aad.gov.au/metadata/records/ASAC_1328

Status
Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Topic category
  • Biota
  • Oceans

Extent

N
S
E
W


Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2002-10-29 2005-02-28
NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > OCEANS > SEA ICE > PACK ICE
  • EARTH SCIENCE > OCEANS > SEA ICE
  • EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
  • EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS
  • EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > DIATOMS
  • EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS
  • EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PIGMENTS > CHLOROPHYLL
  • EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC
  • EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES
  • EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > NUTRIENT CYCLING
  • EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PRIMARY PRODUCTION
  • EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > TROPHIC DYNAMICS
Keywords
  • CHLOROPHYLL
  • CRUSTACEANS
  • DIATOMS
  • GUT CONTENTS
  • LIPIDS
  • MERTZ GLACIER
  • NUTRIENTS
  • SEA ICE
  • STABLE ISOTOPES
NASA/GCMD Earth Science Keywords
  • ICE AUGERS
  • PLANKTON NETS
  • GAS CHROMATOGRAPHS
  • MICROSCOPES
  • FLUOROMETERS
NASA/GCMD Earth Science Keywords
  • FIELD SURVEYS
  • SHIPS
  • FIELD INVESTIGATION
  • R/V AA > R/V Aurora Australis
NASA/GCMD Earth Science Keywords
  • EASIZ > Ecology of the Antarctic Sea Ice Zone
NASA/GCMD Earth Science Keywords
  • AMD/AU
  • CEOS
  • AMD
NASA/GCMD Earth Science Keywords
  • OCEAN > SOUTHERN OCEAN
  • CONTINENT > ANTARCTICA
  • CONTINENT > ANTARCTICA > DAVIS
  • GEOGRAPHIC REGION > POLAR

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
Linkage
Creative Commons by Attribution logo

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=ASAC_1328 when using these data.
Language
English
Character encoding
UTF8

Distribution Information

Distributor

Distributor

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Distributor

Fees
Free
Planned available datetime
2012-12-20T00:00:00
Units of distribution
kb
Transfer size
159
Distribution format
  • Excel, Word

OnLine resource
GET DATA

Download point for the data

OnLine resource
PROJECT HOME PAGE

Public information for ASAC project 1328

OnLine resource
VIEW RELATED INFORMATION

Citation reference for this metadata record and dataset

Resource lineage

Statement
See the download file for more information.
Hierarchy level
Dataset
Maintenance and update frequency
As needed
Maintenance note
2012-05-07 - record updated by Dave Connell after data were provided by Kerrie Swadling. 2015-08-24 - record updated by Dave Connell - Basic updates.

Metadata

Metadata identifier
string/ASAC_1328

Language
English
Character encoding
UTF8

Author

SWADLING, KERRIE
School of Zoology
University of Tasmania
GPO BOX 252-05
Hobart
Tasmania
7001
Australia

Sponsor

Australian Antarctic Division

Owner

AADC

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
afbdc5fb-be06-4ecf-bcbf-89a508c4500d

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Date (Last Revision)
2015-11-30T04:50:43

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/ASAC_1328

Point of truth for the metadata record

Date info (Creation)
2001-04-09T00:00:00
Date info (Last Update)
2017-04-26

Metadata standard

Title
ISO 19115-3
Edition
2014
Other citation details
Version 1
Title
DIF to ISO 19115-1 Profile
 
 

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