[Parameters: Topic='BIOLOGICAL CLASSIFICATION', Term='ANIMALS/INVERTEBRATES', Variable_Level_1='ECHINODERMS']
Assessing the impact of contaminated sediments on hard-substrate Antarctic marine communitiesEntry ID: ASAC_2691
Abstract: Metadata record for data from ASAC Project 2691
See the link below for public details on this project.
Contaminants may persist in marine sediments and be re-suspended during storms or by the activity of animals. This project will assess the impact of contaminated sediments on plants and animals that live directly above the sediment. Rocky-reef organisms form a large component of Antarctica's ... biodiversity and include algae as well as filter feeding animals such as sponges, lace corals, and fanworms. Many of these plants and animals live on boulders embedded within sediments. Information on the response of individuals, populations and communities to contamination will be used to develop sediment quality guidelines appropriate for the protection of the Antarctic environment.
The toxicity of aqueous metals and metal-contaminated resuspended sediment to the spirorbid polychaete Spirorbis nordenskjoldi Ehlers, 1900 was assessed in assays conducted during the 2005/6 and 2006/7 field seasons. A more detailed description of the design of experiments and the methods used can be found in Hill et al, 2009. Spirorbids were exposed to aqueous solutions of copper, lead and zinc singularly, and in mixtures. Spirorbids were also exposed to resuspended metal-spiked sediments.
Spirorbids attached to the brown alga Desmarestia sp were collected from Beall Island, Windmill Islands, East Antarctica, a clean site located approximately 2 km from Casey Station. Algae and animals were kept in the aquarium facility on station, in seawater maintained at 1 C and a 12-h light:dark photoperiod. Seawater was constantly aerated and changed every 5
to 6 d. Spirorbids were used within two weeks of their collection and fed once per week with plankton. Spirorbids were removed from the surface of algal blades 24 h before the start of a test, and allowed to recover in a constant-temperature chamber (CTC) at 0.5 C. Immediately before the start of tests, spirorbids were examined, and only healthy individuals were selected for tests. Spirorbids were determined to be healthy if their tentacular crown (fan) was extended and retracted quickly in response to stimuli.
The download file contains further information on the data.
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Start Date: 2005-10-01Stop Date: 2007-03-31
HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > CONTAMINANT LEVELS/SPILLS
OCEANS > MARINE ENVIRONMENT MONITORING
OCEANS > MARINE SEDIMENTS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ROUNDWORMS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > CNIDARIANS > ANTHOZOANS/HEXACORALS > SEA ANEMONES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ECHINODERMS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > SEGMENTED WORMS (ANNELIDS)
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > SPONGES
BIOLOGICAL CLASSIFICATION > PLANTS > ALGAE
BIOLOGICAL CLASSIFICATION > PLANTS
BIOLOGICAL CLASSIFICATION > PLANTS > MACROALGAE (SEAWEEDS)
BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT
BIOSPHERE > AQUATIC ECOSYSTEMS > MARINE HABITAT
ISO Topic Category
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Use Constraints Data not available yet
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Role: TECHNICAL CONTACT
Email: lhajr at gnv.ifas.ufl.edu
Email: lallen at gainesville.usda.ufl.edu
Crop Genetics and Environmental Research Unit Center for Medical, Agricultural and Veterinary Entomology 1700 SW 23rd Dr.
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Department of Agronomy, University of Florida po box 110500
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Role: DIF AUTHOR
Phone: (301) 614-6898
Email: Tyler.B.Stevens at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: MD
Postal Code: 20771
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Creation and Review Dates
DIF Creation Date: 2004-08-30
Last DIF Revision Date: 2012-11-02