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The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - NSF-ANT08-38776
Entry ID: NSF-ANT08-38776_1


Summary
Abstract: The near shore environments of the western Antarctic Peninsula (WAP) harbor extremely high densities of mesograzers (small invertebrate predators approximately 1-25 mm in length) such as benthic amphipods, as well as rich assemblages of macroalgae, endophytes, and macroinvertebrates. Unlike temperate and tropical shallow marine environments, where fish and sea urchins are key grazers structuring the community, mesograzers appear to be much more important in the WAP. Accordingly, the proposed research has two main objectives: (1) To further investigate the interactions between the ecologically dominant large macrophytes, filamentous epi/endophytes, and mesograzers and (2) To determine the nature of interactions between mesograzers and sessile invertebrates. Specifically, the research will examine the following hypotheses: 1: The effects of endophytes on macrophytes are often negative, and consequently macrophytes defend against endophytic infection. 2: Mesoherbivores prevent filamentous algal species, common in the intertidal, from dominating subtidal assemblages. 3: Mesograzer predation pressure on sessile benthic macroinvertebrates, primarily sponges and tunicates, is greatest in shallow habitats dominated by macrophytes, and this impacts depth distributions of macroinvertebrate species. 4: Benthic macroinvertebrates may defend against mesograzers with secondary metabolites which effect molting and/or deter feeding. Broader impacts include involvement of undergraduates, including minorities, in research; training of graduate students, and continuation of the highly successful UAB IN ANTARCTICA interactive web program (two time recipient of awards of excellence from the US Council for Advancement and Support of Education). The researchers also will share their scientific endeavors with teachers, K-12 students, and other members of the community at large while in residence in Antarctica. In addition, the investigators will request the participation of a PolarTREC teacher.

Related URL
Link: View Related Information
Description: Original data submitted.


Link: View Related Information
Description: NSF Award Abstract #0838776

Geographic Coverage
 N: -60.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Version: 1


Temporal Coverage
Start Date: 2009-09-01
Stop Date: 2013-08-31


Location Keywords
OCEAN > SOUTHERN OCEAN
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR
VERTICAL LOCATION > SEA FLOOR


Science Keywords
BIOLOGICAL CLASSIFICATION >ANIMALS/INVERTEBRATES    [Definition]
BIOLOGICAL CLASSIFICATION >PLANTS >MACROALGAE (SEAWEEDS)    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS >BENTHIC    [Definition]


Project
NSF/PLR >Division of Polar Programs, National Science Foundation    [Information]


Data Set Progress
ACTIVE


Data Center
United States Antarctic Program Data Center    [Information]
Data Center URL: http://www.usap-dc.org/

Data Center Personnel
Name: DATA MANAGER
Email: info at usap-dc.org
Contact Address:
Lamont-Doherty Earth Observatory
61 Route 9W
City: Palisades
Province or State: NY
Postal Code: 10964
Country: USA


Personnel
BILL BAKER
Role: INVESTIGATOR
Email: bjbaker at usf.edu
Contact Address:
University of South Florida
City: Tampa
Province or State: FL
Postal Code: 33620
Country: USA


Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2011-10-11
Last DIF Revision Date: 2019-03-07



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