SILICA,NITROGEN AND PHOSPHORUS REQUIREMENTS OF SOME SOUTHERN AFRICAN DIATOMS |
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| Authors: | G C Coetzer D F Toerien F R Schoeman |
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| Institution: | National Institute for Water Research, Council for Scientific and Industrial Research , P.O. Box 395, Pretoria, South Africa |
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| Abstract: | SUMMARY The yield coefficients and minimum cell concentrations of silica, nitrogen and phosphorus have been determined for four diatoms, Navicula pell iculosa (Brébisson ex Kützing) Hilse, Nitzschia elliptica Hustedt, N. palea (Kützing) W. Smith and N. perpusilla Rabenhorst. It was found that the three Nitzschia species require more Si > N > P whereas the Navicula species needs more N > Si >P. Where possible the results are evaluated in terms of the morphological and ecological characteristics of these diatoms. |
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| Keywords: | Kneria auriculata status distribution Salmo gairdneri erosion |
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