Diatom, and associated data from grid samples collected in Brown Bay

Sediment samples were collected from nine points along 3 parallel transects within the contaminated Brown Bay. The diatom spreadsheet (diatom_data) contains both initial diatom counts and the relative abundance of benthic species. The abbreviation used to identify species are explained in the separate file called sp_list. Metal, Total Purgeable Hydrocarbons (TPH), and grain-size data are all presented as separate files.

This work was completed as part of ASAC project 1130 (ASAC_1130) and project 2201 (ASAC_2201).

Public summary from project 1130:

Algal mats grow on sea floor in most shallow marine environments. They are thought to contribute more than half of the total primary production in many of these areas, making them a critical food source for invertebrates and some fish. We will establish how important they are in Antarctic marine environments and determine the effects of local sewerage and tip-site pollution. We will also investigate the impact on the algal mats of the additional UV radiation which results from the ozone hole.

Public summary from project 2201:

As a signatory to the Protocol on Environmental Protection to the Antarctic Treaty Australia is committed to comprehensive protection of the Antarctic environment. This protocol requires that activities in the Antarctic shall be planned and conducted on the basis of information sufficient to make prior assessments of, and informed judgements about, their possible impacts on the Antarctic environment. Most of our activities in the Antarctic occur along the narrow fringe of ice-free rock adjacent to the sea and many of our activities have the potential to cause environmental harm to marine life. The Antarctic seas support the most complex and biologically diverse plant and animal communities of the region. However, very little is known about them and there is certainly not sufficient known to make informed judgements about possible environmental impacts

The animals and plants of the sea-bed are widely accepted as being the most appropriate part of the marine ecosystem for indicating disturbance caused by local sources. Attached sea-bed organisms have a fixed spatial relationship with a given place so they must either endure conditions or die. Once lost from a site recolonisation takes some time, as a consequence the structure of sea-bed communities reflect not only present conditions but they can also integrate conditions in the past. In contrast, fish and planktonic organisms can move freely so their site of capture does not indicate a long residence time at that location. Because sea-bed communities are particularly diverse they contain species with widely differing life strategies, as a result different species can have very different levels of tolerance to stress; this leads to a range of subtle changes in community structure as a response to gradually increasing disturbance, rather than an all or nothing response.

This project will examine sea-bed communities near our stations to determine how seriously they are affected by human activities. This information will be used to set priorities for improving operational procedures to reduce the risk of further environmental damage.

The fields in this dataset are:

bbg_lat spreadsheet

Site

Latitude

Longitude

Easting

Northing

Diatoms spreadsheet

Species

Site

Abundance

Transect

Metals Spreadsheet

Sample

Antimony

Arsenic

Cadmium

Chromium

Copper

Iron

Lead

Manganese

Mercury

Nickel

Silver

Tin

Zinc

Total Organic Carbon

Easting

Northing

TPH Spreadsheet

Site

Total Purgeable Hydrocarbons

Fraction of Purgeable Hydrocarbons

Identification info

Alternate title: Diatom, and associated data from grid samples collected in Brown Bay

Date (Publication): 2003-06-11

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:10.4225/15/5ae2bf1d91c0b

Originator

Riddle, M.J., Stark, J.S. and Cunningham, L.K.

Publisher

Australian Antarctic Data Centre

Principal investigator

RIDDLE, MARTIN J.

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

Principal investigator

STARK, JONATHAN SEAN

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

+61 3 6232 3589

+61 3 6232 3158 (facsimile)

Principal investigator

CUNNINGHAM, LAURA KAY

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

Collaborator

CUNNINGHAM, LAURA KAY

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

Name: CAASM Metadata

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

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: 1998-09-01 1998-12-31

Title: Effects of metal and petroleium hydrocarbon contamination on benthic diatom communities near Casey Station, Antarctica: An experimental approach

Date (Publication): 2003

Citation identifier: 39