title: Orthophosphate turnover in East African lakes.
abstract: Turnover rates of32P-PO4and concentrations of orthophosphate as soluble reactive phosphorus (SRP) were measured in five East African waters. Rapid incorporation of32P-PO4by the seston and orthophosphate concentrations below the limit of detectibility were found in Lakes Elmenteita, Naivasha, and Naivasha Crater Lake. Turnover was slow and orthophosphate concentration high in both Lake Nakuru and the Crescent Island Crater basin of Lake Naivasha. Further experiments in Lake Nakuru indicated that colloidal binding of orthophosphate was limited and that particles retained by an 8.0 μ filter incorporated 66% as much tracer as particles retained by a 0.1 μ filter. These experiments strengthen our conclusion that a large quantity of orthophosphate is available for algal use in Lake Nakuru.
authors.affiliation: Zoologisches Institute der Universität, D-8000, München, Germany.
authors.forename: Robert Henry
authors.initials: RH
authors.lastname: Peters
authors.affiliation: Department of Zoology, Duke University, 27706, Durham, North Carolina, USA.
authors.forename: Sally
authors.initials: S
authors.lastname: MacIntyre