Data

Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997)

Australian Antarctic Division
Riddle, M.J. and Stark, J.S. ; RIDDLE, MARTIN J. ; STARK, JONATHAN SEAN
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://data.aad.gov.au/metadata/ASAC_2201_Casey_benthic_survey2&rft.title=Soft sediment assemblages at Casey Station: Spatial variation and human impacts. (core samples: Oct-Dec 1997)&rft.identifier=http://data.aad.gov.au/metadata/ASAC_2201_Casey_benthic_survey2&rft.publisher=Australian Antarctic Data Centre&rft.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:LocationSite/PlotReplicateAntimonyArsenicCadmiumChromiumCopperIronLeadManganeseMercuryNickelSilverTinZincWeightToxicityProgress Code: completedStatement: Gammarid, Isopod, gastropod faunas identified at the Australian Museum. Remaining faunas identified by J. Stark.&rft.creator=Riddle, M.J. and Stark, J.S. &rft.creator=RIDDLE, MARTIN J. &rft.creator=STARK, JONATHAN SEAN &rft.date=2001&rft.coverage=westlimit=110; southlimit=-66.34952; eastlimit=110.53687; northlimit=-66.25833&rft.coverage=westlimit=110; southlimit=-66.34952; eastlimit=110.53687; northlimit=-66.25833&rft.coverage=uplimit=5; downlimit=5&rft.coverage=uplimit=5; downlimit=5&rft_rights=These data are publicly available for download from the provided URL.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=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_2201_Casey_benthic_survey2 when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=environment&rft_subject=biota&rft_subject=oceans&rft_subject=transportation&rft_subject=EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > CONTAMINANT LEVELS/SPILLS&rft_subject=ANTIMONY&rft_subject=ARSENIC&rft_subject=ASSEMBLAGE&rft_subject=CADMIUM&rft_subject=BENTHIC&rft_subject=CHROMIUM&rft_subject=COMMUNITY&rft_subject=COPPER&rft_subject=CORE SAMPLES&rft_subject=IRON&rft_subject=HUMAN IMPACT&rft_subject=LOCATION&rft_subject=LEAD&rft_subject=CORING DEVICES&rft_subject=FIELD INVESTIGATION&rft_subject=AMD/AU&rft_subject=AMD&rft_subject=CEOS&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0 International (CC BY 4.0)
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These data are publicly available for download from the provided URL.

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_2201_Casey_benthic_survey2 when using these data.

This metadata record is publicly available.

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Full 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

Lineage

Progress Code: completed
Statement: Gammarid, Isopod, gastropod faunas identified at the Australian Museum. Remaining faunas identified by J. Stark.

Data time period: 1997-10-22 to 1997-12-31

This dataset is part of a larger collection

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110.53687,-66.25833 110.53687,-66.34952 110,-66.34952 110,-66.25833 110.53687,-66.25833

110.268435,-66.303925

text: westlimit=110; southlimit=-66.34952; eastlimit=110.53687; northlimit=-66.25833

text: uplimit=5; downlimit=5

Subjects
AMD | AMD/AU | ANTIMONY | ARSENIC | ASSEMBLAGE | BENTHIC | CADMIUM | CEOS | CHROMIUM | COMMUNITY | COPPER | CORE SAMPLES | CORING DEVICES | EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > CONTAMINANT LEVELS/SPILLS | FIELD INVESTIGATION | GEOGRAPHIC REGION > POLAR | HUMAN IMPACT | IRON | LEAD | LOCATION | OCEAN > SOUTHERN OCEAN | biota | environment | oceans | transportation |

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Other Information
Download point for the data (GET DATA)

url : https://data.aad.gov.au/eds/1298/download

Public information for ASAC project 2201 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/search_projects_results.cfm?project_no=2201

Public information for ASAC project 1100 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/search_projects_results.cfm?project_no=1100

Citation reference for this metadata record and dataset (VIEW RELATED INFORMATION)

url : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_2201_Casey_benthic_survey2

Identifiers
  • global : ASAC_2201_Casey_benthic_survey2