[Parameters: Topic='OCEANS', Term='MARINE ENVIRONMENT MONITORING', Variable_Level_1='MARINE OBSTRUCTIONS']
A manipulative field experiment examining the effect of contaminated sediment on the recruitment and recolonisation of soft-sediment infauna.Entry ID: ASAC_2201_Casey_SRE1
Abstract: The effect of location, depth and sediment contamination on recruitment of soft-sediment assemblages were examined in a pilot experiment at Casey Station, East Antarctica. Two locations were used, a polluted bay adjacent to an old disused tip site (Brown Bay) and an undisturbed control (O'Brien Bay). At each location two types of defaunated sediment (polluted and control) were placed at 2 depths, ... 15 m and 25 m. Sediments were left in place over the Austral winter, from March - November. There were large differences in recruitment between the two locations and depths and some differences between the two sediment types. Brown Bay had greater recruitment than O'Brien Bay. Shallow sites had generally greater recruitment than deep, but deep sites had greater diversity (H'), richness (d) and evenness (J'). Control sediment recruited greater numbers of arthropod, gammarid and isopod taxa. There were not only differences in abundance of taxa and assemblage structure but also in spatial variability and variability of populations of certain taxa, with recruitment to the control and deep locations more variable, and recruitment in the control sediment more variable than the polluted sediment. Recruitment was influenced by a combination of location, depth and sediment type. There is some evidence of an environmental impact at the polluted site. The majority of fauna recruiting to the experiment were highly motile colonizing species with non-pelagic lecithotrophic larvae, usually brooded and released as dispersing juveniles, such as gammarids, tanaids, isopods and gastropods.
A total of 56 recruitment samples were collected. Samples were sieved at 500 micro metres and sorted mainly to species. Metal concentrations and total organic carbon concentrations are also included.
Also links to ASAC 1100.
The fields in this dataset are:
Site and replicate
Data Set Citation
Dataset Originator/Creator: Riddle, M.J. and Stark, J.S.
Dataset Title: A manipulative field experiment examining the effect of contaminated sediment on the recruitment and recolonisation of soft-sediment infauna.
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2017-09-07
Dataset Publisher: Australian Antarctic Data Centre
Dataset DOI: doi:10.4225/15/59b0c191e03b8Online Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 1997-03-05Stop Date: 1997-11-18
Vertical Resolution: 1 m
HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > CONTAMINANT LEVELS/SPILLS
HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > HEAVY METALS CONCENTRATION
HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > SEWAGE DISPOSAL
OCEANS > MARINE ENVIRONMENT MONITORING > MARINE OBSTRUCTIONS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ECHINODERMS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > SEGMENTED WORMS (ANNELIDS)
BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC
BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL
BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > SPECIES DOMINANCE INDICES
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > COMMUNITY STRUCTURE
Quality Gammarid, Isopod, gastropod faunas identified at the Australian Museum. Remaining faunas identified by J. Stark.
Access Constraints These data are publicly available for download from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_220... when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 11 kb
Distribution Format: excel
Stark J. S. (2001), Human impacts and assemblages in marine soft-sediments at Casey Station, Antarctica, PhD thesis, University of New England
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2001-05-02
Last DIF Revision Date: 2017-09-11