Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997)
A survey of macrobenthic assemblages in soft-sediments was done at Casey Station, East Antarctica. Samples were taken by divers using hand-held corers (core size - 10 cm diameter by 10 cm deep). The aims were: 1) To examine spatial variation at several scales in these assemblages; 2) To determine if...
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Australian Antarctic Data Centre
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Online Access: | https://researchdata.ands.org.au/soft-sediment-assemblages-dec-1997/699757 https://doi.org/10.4225/15/55F762224D664 https://data.aad.gov.au/metadata/records/ASAC_2201_Casey_benthic_survey2 http://nla.gov.au/nla.party-617536 |
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ftands:oai:ands.org.au::699757 2023-05-15T13:46:57+02:00 Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997) RIDDLE, MARTIN J. (hasPrincipalInvestigator) STARK, JONATHAN SEAN (hasPrincipalInvestigator) STARK, JONATHAN SEAN (processor) Australian Antarctic Data Centre (publisher) Spatial: northlimit=-66.25833; southlimit=-66.34952; westlimit=110; eastLimit=110.53687; projection=WGS84 Temporal: From 1997-10-22 to 1997-12-31 https://researchdata.ands.org.au/soft-sediment-assemblages-dec-1997/699757 https://doi.org/10.4225/15/55F762224D664 https://data.aad.gov.au/metadata/records/ASAC_2201_Casey_benthic_survey2 http://nla.gov.au/nla.party-617536 unknown Australian Antarctic Data Centre https://researchdata.ands.org.au/soft-sediment-assemblages-dec-1997/699757 071a6fa0-3901-4ee9-9b6a-e7bd156b0401 doi:10.4225/15/55F762224D664 ASAC_2201_Casey_benthic_survey2 https://data.aad.gov.au/metadata/records/ASAC_2201_Casey_benthic_survey2 http://nla.gov.au/nla.party-617536 Australian Antarctic Data Centre biota environment oceans transportation CONTAMINANT LEVELS/SPILLS EARTH SCIENCE HUMAN DIMENSIONS ENVIRONMENTAL IMPACTS ANTIMONY ARSENIC ASSEMBLAGE CADMIUM BENTHIC CHROMIUM COMMUNITY COPPER CORE SAMPLES IRON HUMAN IMPACT LOCATION LEAD CORING DEVICES FIELD INVESTIGATION OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR dataset ftands https://doi.org/10.4225/15/55F762224D664 2020-01-05T21:16:37Z A survey of macrobenthic assemblages in soft-sediments was done at Casey Station, East Antarctica. Samples were taken by divers using hand-held corers (core size - 10 cm diameter by 10 cm deep). The aims were: 1) To examine spatial variation at several scales in these assemblages; 2) To determine if there were differences between potentially impacted areas and control areas; 3) To determine the level of replication, taxonomic resolution and data transformation that are appropriate to studies of human impacts in Antarctic soft-sediment assemblages. Cores were collected by divers in a hierarchical, spatially nested design incorporating 4 scales: Locations (1000s of metres apart), Sites (100s of metres), Plots (10s of metres) and among replicates within plots (~1 metre). Four replicates for infaunal analysis were collected from each plot. Variation at the whole assemblage level was most significant at the largest scale: between Locations; but significant differences were also found between Plots within Sites, and between Sites within Locations. The impacted locations, near two waste tips, a sewage outfall and a wharf, as a group were significantly different to control locations. Impacted locations had less variable assemblages but more variable populations of dominant species than control locations. Control locations had greater richness and diversity than impacted locations. Patterns of assemblage structure were similar at fine (species and family) and medium (family to order) levels of taxonomic resolution but changed at coarse (phylum) levels of resolution. Assemblage patterns were similar between untransformed, square root and fourth root transformations but often different in presence/absence transformations. Concentrations of metals in sediments were also analysed and other environmental variables such as grain size and water depth were measured (two replicates from each plot). Multivariate correlations between the biological and environmental datasets were examined. Links to ASAC 1100. The fields in this dataset are: Location Site/Plot Replicate Antimony Arsenic Cadmium Chromium Copper Iron Lead Manganese Mercury Nickel Silver Tin Zinc Weight Toxicity Dataset Antarc* Antarctic Antarctica East Antarctica Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean East Antarctica Casey Station ENVELOPE(110.528,110.528,-66.282,-66.282) ENVELOPE(110,110.53687,-66.25833,-66.34952) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota environment oceans transportation CONTAMINANT LEVELS/SPILLS EARTH SCIENCE HUMAN DIMENSIONS ENVIRONMENTAL IMPACTS ANTIMONY ARSENIC ASSEMBLAGE CADMIUM BENTHIC CHROMIUM COMMUNITY COPPER CORE SAMPLES IRON HUMAN IMPACT LOCATION LEAD CORING DEVICES FIELD INVESTIGATION OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota environment oceans transportation CONTAMINANT LEVELS/SPILLS EARTH SCIENCE HUMAN DIMENSIONS ENVIRONMENTAL IMPACTS ANTIMONY ARSENIC ASSEMBLAGE CADMIUM BENTHIC CHROMIUM COMMUNITY COPPER CORE SAMPLES IRON HUMAN IMPACT LOCATION LEAD CORING DEVICES FIELD INVESTIGATION OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997) |
topic_facet |
biota environment oceans transportation CONTAMINANT LEVELS/SPILLS EARTH SCIENCE HUMAN DIMENSIONS ENVIRONMENTAL IMPACTS ANTIMONY ARSENIC ASSEMBLAGE CADMIUM BENTHIC CHROMIUM COMMUNITY COPPER CORE SAMPLES IRON HUMAN IMPACT LOCATION LEAD CORING DEVICES FIELD INVESTIGATION OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
description |
A survey of macrobenthic assemblages in soft-sediments was done at Casey Station, East Antarctica. Samples were taken by divers using hand-held corers (core size - 10 cm diameter by 10 cm deep). The aims were: 1) To examine spatial variation at several scales in these assemblages; 2) To determine if there were differences between potentially impacted areas and control areas; 3) To determine the level of replication, taxonomic resolution and data transformation that are appropriate to studies of human impacts in Antarctic soft-sediment assemblages. Cores were collected by divers in a hierarchical, spatially nested design incorporating 4 scales: Locations (1000s of metres apart), Sites (100s of metres), Plots (10s of metres) and among replicates within plots (~1 metre). Four replicates for infaunal analysis were collected from each plot. Variation at the whole assemblage level was most significant at the largest scale: between Locations; but significant differences were also found between Plots within Sites, and between Sites within Locations. The impacted locations, near two waste tips, a sewage outfall and a wharf, as a group were significantly different to control locations. Impacted locations had less variable assemblages but more variable populations of dominant species than control locations. Control locations had greater richness and diversity than impacted locations. Patterns of assemblage structure were similar at fine (species and family) and medium (family to order) levels of taxonomic resolution but changed at coarse (phylum) levels of resolution. Assemblage patterns were similar between untransformed, square root and fourth root transformations but often different in presence/absence transformations. Concentrations of metals in sediments were also analysed and other environmental variables such as grain size and water depth were measured (two replicates from each plot). Multivariate correlations between the biological and environmental datasets were examined. Links to ASAC 1100. The fields in this dataset are: Location Site/Plot Replicate Antimony Arsenic Cadmium Chromium Copper Iron Lead Manganese Mercury Nickel Silver Tin Zinc Weight Toxicity |
author2 |
RIDDLE, MARTIN J. (hasPrincipalInvestigator) STARK, JONATHAN SEAN (hasPrincipalInvestigator) STARK, JONATHAN SEAN (processor) Australian Antarctic Data Centre (publisher) |
format |
Dataset |
title |
Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997) |
title_short |
Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997) |
title_full |
Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997) |
title_fullStr |
Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997) |
title_full_unstemmed |
Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997) |
title_sort |
soft sediment assemblages at casey station: spatial variation and human impacts. (core samples: oct-dec 1997) |
publisher |
Australian Antarctic Data Centre |
url |
https://researchdata.ands.org.au/soft-sediment-assemblages-dec-1997/699757 https://doi.org/10.4225/15/55F762224D664 https://data.aad.gov.au/metadata/records/ASAC_2201_Casey_benthic_survey2 http://nla.gov.au/nla.party-617536 |
op_coverage |
Spatial: northlimit=-66.25833; southlimit=-66.34952; westlimit=110; eastLimit=110.53687; projection=WGS84 Temporal: From 1997-10-22 to 1997-12-31 |
long_lat |
ENVELOPE(110.528,110.528,-66.282,-66.282) ENVELOPE(110,110.53687,-66.25833,-66.34952) |
geographic |
Antarctic Southern Ocean East Antarctica Casey Station |
geographic_facet |
Antarctic Southern Ocean East Antarctica Casey Station |
genre |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.ands.org.au/soft-sediment-assemblages-dec-1997/699757 071a6fa0-3901-4ee9-9b6a-e7bd156b0401 doi:10.4225/15/55F762224D664 ASAC_2201_Casey_benthic_survey2 https://data.aad.gov.au/metadata/records/ASAC_2201_Casey_benthic_survey2 http://nla.gov.au/nla.party-617536 |
op_doi |
https://doi.org/10.4225/15/55F762224D664 |
_version_ |
1766245848496209920 |