Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica
Dates given in temporal coverage are approximate only. The year is accurate. A sediment core was collected from the western side of Pidgeon Island, (66.3216 S, 110.445 E) at a water depth of 82.0 m. This sediment core (PG 1411-2) was recovered using a release-controlled piston corer, with a length o...
id |
ftands:oai:ands.org.au::685122 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PROTISTS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC COASTAL COMMUNITY STRUCTURE BIOSPHERE ECOLOGICAL DYNAMICS COMMUNITY DYNAMICS AGE BENTHIC % BENTHIC INDEX CORRECTED AGE DEPTH MARINE PLANKTONIC % RADIOCARBON AGE SEDIMENTS SITE SPECIES TEMPORAL SEDIMENT CORERS FIELD SURVEYS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > Windmill Islands GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PROTISTS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC COASTAL COMMUNITY STRUCTURE BIOSPHERE ECOLOGICAL DYNAMICS COMMUNITY DYNAMICS AGE BENTHIC % BENTHIC INDEX CORRECTED AGE DEPTH MARINE PLANKTONIC % RADIOCARBON AGE SEDIMENTS SITE SPECIES TEMPORAL SEDIMENT CORERS FIELD SURVEYS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > Windmill Islands GEOGRAPHIC REGION > POLAR Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica |
topic_facet |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PROTISTS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC COASTAL COMMUNITY STRUCTURE BIOSPHERE ECOLOGICAL DYNAMICS COMMUNITY DYNAMICS AGE BENTHIC % BENTHIC INDEX CORRECTED AGE DEPTH MARINE PLANKTONIC % RADIOCARBON AGE SEDIMENTS SITE SPECIES TEMPORAL SEDIMENT CORERS FIELD SURVEYS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > Windmill Islands GEOGRAPHIC REGION > POLAR |
description |
Dates given in temporal coverage are approximate only. The year is accurate. A sediment core was collected from the western side of Pidgeon Island, (66.3216 S, 110.445 E) at a water depth of 82.0 m. This sediment core (PG 1411-2) was recovered using a release-controlled piston corer, with a length of 3 m, using the coring technique described in Melles et al., (1994). The total core length was 240 cm. This core was stored in the dark, at 0 degrees C until required. Samples were taken for diatom analyses and radiocarbon (14C) dating. Prior to sub-sampling the core was split in half, along its length. One half was used for sampling, the other kept intact and stored at IASOS (University of Tasmania). To reduce potential contamination, resulting from the disturbance of sediments during the core-splitting procedure, a thin layer of sediment was removed from the exposed surface immediately prior to sampling. In order to obtain samples for diatom analysis, a toothpick was inserted into the core segment, and used to gouge a small amount of sediment from the middle of the core. Samples for diatom analyses were initially collected every 5 mm, however, sampling frequency progressively decreased down the core. Samples for radiocarbon data consisted of at least 1 cm 3 of sediment, collected from the middle of the core. These samples were collected from between 0-1 cm, 12-13 cm, 59-60 cm, 77-78 cm, 117-118 cm, and 229-230 cm depth. Diatom data are presented as raw counts, benthic abundances, the ratio of benthic to plankton species, and as the benthic index. Calculated ages (in years) are also given for all samples. The sedimentological core log is given as a powerpoint presentation. 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: Species Site Benthic % Planktonic % Depth (cm) Age (years) Radiocarbon Age Corrected Age Benthic Index |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica |
title_short |
Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica |
title_full |
Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica |
title_fullStr |
Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica |
title_full_unstemmed |
Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica |
title_sort |
data from a 3 m sediment core collected west of pidgeon island in the windmill islands, antarctica |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/3-m-sediment-islands-antarctica/685122 https://data.aad.gov.au/metadata/records/Diatoms_long_core https://data.aad.gov.au/eds/1170/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1130 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2201 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=Diatoms_long_core |
op_coverage |
Spatial: northlimit=-66.2; southlimit=-66.5; westlimit=110.45; eastLimit=110.7 Temporal: From 1998-09-01 to 1998-12-31 |
long_lat |
ENVELOPE(110.417,110.417,-66.350,-66.350) ENVELOPE(110.450,110.450,-66.317,-66.317) ENVELOPE(110.45,110.7,-66.2,-66.5) |
geographic |
Antarctic The Antarctic Windmill Islands Pidgeon Island |
geographic_facet |
Antarctic The Antarctic Windmill Islands Pidgeon Island |
genre |
Antarc* Antarctic Antarctica Pidgeon Island Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctica Pidgeon Island Windmill Islands |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/3-m-sediment-islands-antarctica/685122 5ecbca37-3033-4d33-aa84-54e185632fe3 https://data.aad.gov.au/metadata/records/Diatoms_long_core https://data.aad.gov.au/eds/1170/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1130 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2201 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=Diatoms_long_core |
_version_ |
1766245600835141632 |
spelling |
ftands:oai:ands.org.au::685122 2023-05-15T13:46:55+02:00 Data from a 3 m sediment core collected west of Pidgeon Island in the Windmill Islands, Antarctica AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-66.2; southlimit=-66.5; westlimit=110.45; eastLimit=110.7 Temporal: From 1998-09-01 to 1998-12-31 https://researchdata.ands.org.au/3-m-sediment-islands-antarctica/685122 https://data.aad.gov.au/metadata/records/Diatoms_long_core https://data.aad.gov.au/eds/1170/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1130 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2201 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=Diatoms_long_core unknown Australian Ocean Data Network https://researchdata.ands.org.au/3-m-sediment-islands-antarctica/685122 5ecbca37-3033-4d33-aa84-54e185632fe3 https://data.aad.gov.au/metadata/records/Diatoms_long_core https://data.aad.gov.au/eds/1170/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1130 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2201 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=Diatoms_long_core https://data.aad.gov.au biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PROTISTS EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC COASTAL COMMUNITY STRUCTURE BIOSPHERE ECOLOGICAL DYNAMICS COMMUNITY DYNAMICS AGE BENTHIC % BENTHIC INDEX CORRECTED AGE DEPTH MARINE PLANKTONIC % RADIOCARBON AGE SEDIMENTS SITE SPECIES TEMPORAL SEDIMENT CORERS FIELD SURVEYS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > Windmill Islands GEOGRAPHIC REGION > POLAR dataset ftands 2020-01-05T21:06:00Z Dates given in temporal coverage are approximate only. The year is accurate. A sediment core was collected from the western side of Pidgeon Island, (66.3216 S, 110.445 E) at a water depth of 82.0 m. This sediment core (PG 1411-2) was recovered using a release-controlled piston corer, with a length of 3 m, using the coring technique described in Melles et al., (1994). The total core length was 240 cm. This core was stored in the dark, at 0 degrees C until required. Samples were taken for diatom analyses and radiocarbon (14C) dating. Prior to sub-sampling the core was split in half, along its length. One half was used for sampling, the other kept intact and stored at IASOS (University of Tasmania). To reduce potential contamination, resulting from the disturbance of sediments during the core-splitting procedure, a thin layer of sediment was removed from the exposed surface immediately prior to sampling. In order to obtain samples for diatom analysis, a toothpick was inserted into the core segment, and used to gouge a small amount of sediment from the middle of the core. Samples for diatom analyses were initially collected every 5 mm, however, sampling frequency progressively decreased down the core. Samples for radiocarbon data consisted of at least 1 cm 3 of sediment, collected from the middle of the core. These samples were collected from between 0-1 cm, 12-13 cm, 59-60 cm, 77-78 cm, 117-118 cm, and 229-230 cm depth. Diatom data are presented as raw counts, benthic abundances, the ratio of benthic to plankton species, and as the benthic index. Calculated ages (in years) are also given for all samples. The sedimentological core log is given as a powerpoint presentation. 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: Species Site Benthic % Planktonic % Depth (cm) Age (years) Radiocarbon Age Corrected Age Benthic Index Dataset Antarc* Antarctic Antarctica Pidgeon Island Windmill Islands Research Data Australia (Australian National Data Service - ANDS) Antarctic The Antarctic Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) Pidgeon Island ENVELOPE(110.450,110.450,-66.317,-66.317) ENVELOPE(110.45,110.7,-66.2,-66.5) |