Responses of Plankton to Filamentous and Toxic Blue-Green   Algae
{'Code': '08010207', 'Directorate': {'Abbreviation': 'BIO', 'LongName': 'Direct For Biological Sciences'}, 'Division': {'Abbreviation': 'DEB', 'LongName': 'Division Of Environmental Biology'}}
{'SignBlockName': 'Tarri Joyner', 'PO_EMAI': 'tjoyner@nsf.gov', 'PO_PHON': '7032927742'}
This study examines three specific hypotheses regarding                 the responses of planktonic rotifers and cladocerans to                         potentially interfering non-toxic filaments, toxic cells, and                   toxins of blue-green algae.  The hypotheses, supported by some                  field observations and laboratory experiments, predict that: 1)                 rotifers, especially those with specialized diets, will beless                  susceptible than cladocerqans to non-toxic filaments and toxic                  cells of blue-green algae; 2) the presence of such filaments and                toxic cells will reduce the ability of cladocerans to                           competitively suppress rotifers; and 3) rotifers and cladocerans                will be equally susceptible to exotoxins and extracted endotoxins               of blue-green algae.  The hypotheses will be tested by: 1)                      determining the effects of non-toxic filaments, toxic cells, and                soluble toxins of blue-green algae on the intrinsic rates of                    natural increase, feeding rates, feeding behaviors, and swimming                behaviors of a variety of rotifers and cladocerans; and 2)                      determining the abilities of rotifers to compete with cladocerans               in long-term, mixed-species cultures with and without non-toxic                 filaments or toxic cells of blue-green algae.  The results of                   these experiments will be useful in understanding and predicting                the effects of these algae on zooplankton population dynamics and               species structure in natural communities.  Interfering blue-green               algae, like zooplanktivorous fish, may slelectively inhibit                     cladocerans and there by favor the development of rotifers.
{'FirstName': 'John', 'LastName': 'Gilbert', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'John J Gilbert', 'EmailAddress': 'john.j.gilbert@dartmouth.edu', 'NSF_ID': '000253197', 'StartDate': '10/15/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Dartmouth College', 'CityName': 'HANOVER', 'ZipCode': '037552170', 'PhoneNumber': '6036463007', 'StreetAddress': '7 LEBANON ST', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'New Hampshire', 'StateCode': 'NH', 'CONGRESSDISTRICT': '02', 'CONGRESS_DISTRICT_ORG': 'NH02', 'ORG_UEI_NUM': 'EB8ASJBCFER9', 'ORG_LGL_BUS_NAME': 'TRUSTEES OF DARTMOUTH COLLEGE', 'ORG_PRNT_UEI_NUM': 'T4MWFG59C6R3'}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '1127', 'Text': 'Evolutionary Processes'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1987&All=true', 'xml': '8705233.xml'}