Trophic Interactions between Phagotrophic Protozoa and      Bacterioplankton in Coastal Waters
{'Code': '06040301', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'OCE', 'LongName': 'Division Of Ocean Sciences'}}
{'SignBlockName': 'Phillip R. Taylor', 'PO_EMAI': None, 'PO_PHON': None}
It is now firmly established that heterotrophic microbes,                       bacteria and phagotrophic protozoa are responsible for a                        largepart of carbon/energy flow in marine food webs. Using                      fluorescently labeled bacteria prepared from                                    naturalbacterioplankton assemblages, it has been demonstrated                   that &lt;20um ciliates, from waters in a salt marsh estuary and                    fromcoastal waters in the NWMediterranean Sea, could                            grazebacteria at high clearance rates. And these                                ciliatespreferentially ingest freely suspended, rather                          that particle-attached, bacteria. Previous studies have provided                indirectevidence for a positive feedback effect of                              bacterivorousprotozoa on bacterial growth. Continued                            investigations will beconducted on protozoa-bacteria trophic                    interactions in coastal pelagic food webs emphasizing the: 1)                   evaluation of short-termand fine spatial scale variations in both               bacterioplanktonproductivity and protozoan bacterivory within                   discrete watermasses; 2) examination of the extent of resource                  partitioningamong bacterivorous protozoa, especially with respect               to the size spectra of bacteria grazed by flagellates and                       ciliates; 3)determination of the efficiency of conversion of                    ingestedbacteria into protozoan biomass; and 4) testing the                     hypothesisthat decoupling estuarine bacteria from their protozoan               grazersresults in a change in bacterial metabolism.
[{'FirstName': 'Barry', 'LastName': 'Sherr', 'PI_MID_INIT': 'F', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Barry F Sherr', 'EmailAddress': 'sherrb@coas.oregonstate.edu', 'NSF_ID': '000168240', 'StartDate': '05/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'Evelyn', 'LastName': 'Sherr', 'PI_MID_INIT': 'B', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Evelyn B Sherr', 'EmailAddress': 'sherre@coas.oregonstate.edu', 'NSF_ID': '000264375', 'StartDate': '05/01/1989', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}]
{'Name': 'University of Georgia Research Foundation Inc', 'CityName': 'ATHENS', 'ZipCode': '306021589', 'PhoneNumber': '7065425939', 'StreetAddress': '310 E CAMPUS RD RM 409', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Georgia', 'StateCode': 'GA', 'CONGRESSDISTRICT': '10', 'CONGRESS_DISTRICT_ORG': 'GA10', 'ORG_UEI_NUM': 'NMJHD63STRC5', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1650', 'Text': 'BIOLOGICAL OCEANOGRAPHY'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8823091.xml'}