Effect of Ozone Depletion on Antarctic Marine Phytoplankton
{'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'}
In recent years, reduced levels of atmospheric ozone observed in the            early austral spring (September - October) over the South Polar region          have been accompanied by increased levels of incident ultraviolet               radiation (UVR).  UVR is potentially very damaging to phytoplankton,            the microscopic plants which constitute the base of the food web in             aquatic ecosystems.  This project is a quantitative assessment of the           effects of UVR on Antarctic marine phytoplankton.  The impact of chronic        exposure to UVR will be evaluated via a month-long incubation experiment        to be conducted at Palmer Station, Antarctica using flow-through                chambers and natural surface seawater.  Phytoplankton will be exposed to        five different UVR regimes:  incident, two reduced levels and two               enhanced levels.  Changes in biomass, primary productivity and pigment          composition will be monitored at 15-day intervals.  Concurrent with             the month-long incubation, natural samples will also be exposed to the          various UVR treatments over short time intervals (2, 4 and 8 hours) to          evaluate the effects of acute UVR exposure on phytoplankton                     productivity and pigment composition.  Such a combination of                    experiments will address the potential ecological consequences of               increasing levels of UVR on Antarctic phytoplankton in particular and           on the Antarctic marine ecosystem in general.
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[{'Code': '511100', 'Text': 'ANT Organisms & Ecosystems'}, {'Code': '919900', 'Text': 'Unallocated Program Costs'}]
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1987&All=true', 'xml': '8712671.xml'}