Research on Antarctic Coastal Ecosystem Rates (RACER):      Microbial Dynamics and Carbon Flux
{'Code': '01020303', 'Directorate': {'Abbreviation': 'O/D', 'LongName': 'Office Of The Director'}, 'Division': {'Abbreviation': 'OPP', 'LongName': 'Office of Polar Programs'}}
{'SignBlockName': 'Polly A. Penhale', 'PO_EMAI': 'ppenhale@nsf.gov', 'PO_PHON': '7032927420'}
The southern ocean maintains a moderate, but patchy, biological                 productivity in spite of harsh environmental conditions (low                    temperature, extended periods of constant darkness, deep vertical mixing        of surface waters).  Primary production in coastal Antarctic ecosystems         is characterized by an intensive spring bloom which is initiated by a           simultaneous increase in water column stability and availability of             solar radiation.  The duration of the bloom is generally less than 2-3          months, during which time the coastal Antarctic ecosystem receives              approximately 70-90% of its annual organic carbon production.  The net          effect of this temporal pulse of fixed carbon is to increase biological         productivity at all trophic levels, from bacteria to baleen whales.             However, the precise pathways of carbon transfer, and the rates and             mechanisms involved therein have not been carefully investigated.  In           particular, the role of microheterotrophs in Antarctic foodwebs and the         immediate fate of phytoplankton production need to be elucidated.  As           part of the RACER (Research on Antarctic Coastal Ecosystem Rates)               program, this project will evaluate several ecological predictions based        upon central working hypotheses which relate physical characteristics of        the water column to the temporal pulse of biological productivity.              Research efforts will attempt to define the mechanisms, pathways and            rates of coupling between photoautotrophic and heterotrophic populations        and to evaluate the coupling between the pelagic and benthic habitats.          The data obtained during this expedition will add to an overall                 understanding of the rates of primary and secondary production, and will        ultimately be used to formulate a general model of carbon and energy            flow in Antarctic coastal ecosystems.
{'FirstName': 'David', 'LastName': 'Karl', 'PI_MID_INIT': 'M', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'David M Karl', 'EmailAddress': 'dkarl@hawaii.edu', 'NSF_ID': '000137920', 'StartDate': '05/15/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of Hawaii', 'CityName': 'HONOLULU', 'ZipCode': '968222247', 'PhoneNumber': '8089567800', 'StreetAddress': '2425 CAMPUS RD SINCLAIR RM 1', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Hawaii', 'StateCode': 'HI', 'CONGRESSDISTRICT': '01', 'CONGRESS_DISTRICT_ORG': 'HI01', 'ORG_UEI_NUM': 'NSCKLFSSABF2', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF HAWAII', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '5111', 'Text': 'ANT Organisms & Ecosystems'}
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