Phytoplankton and hydrological succession in Omega and Taynaya Bays, eastern Antarctica

Metadata record for data from ASAC Project 2146

See the link below for public details on this project.

From the abstracts of the referenced papers:

Early season phytoplankton communities in both Omega and Taynaya Bays are characterised by diatoms sedimenting out of the overlying sea ice. Initial nitrate, phosphate and silicate levels are high and the bay waters are covered with ice and well mixed. In Taynaya Bay the ice cover is retained throughout the season while Omega Bay is free for 6-8 weeks. After ice break out in Omega Bay, the phytoplankton community changes from one dominated by diatoms to one dominated by the phtyoflagellates, Pyramimonas spp., Cryptomonas sp. and Gymnodinium sp. In Taynaya Bay the ice remained and even though phtyoflagellates became more common, diatoms still dominated. These differences in community composition result from differences in light climate, extent of stratification and nutrient levels.

Sediment cores from Abel and Platcha Bays, in the Vestfold Hills, east Antarctica, contain evidence for a local late Holocene increase in fast ice extent and a possible ice cap retreat at approximately 1750 yr BP, a similar time to the Chelnock Glaciation. Prior to this time both bays experienced periods of isolation that lead to changes in their diatom flora, C:N ratio, percentage of biogenic silica and total organic carbon. Three new diatom indices are proposed; the fast ice index, based on the proportion of benthic taxa and the snow index, based on the proportion of Berkelaya adeliense and Thalassiosira australis. These indices show strong relationships with the percentage of biogenic silica, total organic carbon and percentage sand. A weak relationship exists between the fast ice index and delta 13 C and no relationship with the C:N ratio.

The fields in these datasets are:

Date

Julian Day

Sample

Volume filtered (L)

Acetone Volume (ml)

Abs

Chlorophyll

Phytoplankton

Identification info

Alternate title: Phytoplankton and hydrological succession in Omega and Taynaya Bays, eastern Antarctica

Date (Publication): 2005-06-03

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:10.4225/15/55F0CC41E5C16

Originator

McMinn, A.

Publisher

Australian Antarctic Data Centre

Principal investigator

MCMINN, ANDREW

Institute of Antarctic and Southern Ocean Studies

University of Tasmania

Private Bag 77

Hobart

Tasmania

7001

Australia

+61 3 6266 2980

+61 3 6226 2973 (facsimile)

Collaborator

MCMINN, ANDREW

Institute of Antarctic and Southern Ocean Studies

University of Tasmania

Private Bag 77

Hobart

Tasmania

7001

Australia

+61 3 6266 2980

+61 3 6226 2973 (facsimile)

Name: CAASM Metadata

Website: https://data.aad.gov.au/metadata/records/ASAC_2146

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

+61 3 6232 3244

+61 3 6232 3351 (facsimile)

Topic category

Biota
Oceans

Extent

Description: Temporal Coverage

Temporal extent

TimePeriod: 1997-11-13 1998-03-02

Title: Late Holocene increase in sea ice extent in fjords of the Vestfold Hills, Eastern Antarctica

Date (Publication): 2000

Citation identifier: 12

Author

McMinn A.

Name: Antarctic Science

Issue identification: 2

Page: 80-88

Title: Effect of permanent sea ice cover and different nutrient regimes on the phytoplankton succession of fjords of the Vestfold Hills Oasis, Eastern Antarctica

Date (Publication): 2000

Citation identifier: 22

Author

McMinn A., Bleakley N., Roberts D., Trenerry L.

Name: Journal of Plankton Research

Issue identification: 2

Page: 287-303