New Zealand Journal of Marine and Freshwater Research abstracts

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The effects of changes in both the abundance of nitrogen and phosphorus and their ratio on Lake Okaro phytoplankton, with comment on six other central volcanic plateau lakes

DAVID R. S. LEAN¹

STUART F. MITCHELL²

FRANCES R. PICK³

JOHN G. RUETER⁴

MALCOLM T. DOWNES⁵

GEORGE W. PAYNE⁵

STUART E. PICKMERE⁵

EDWARD WHITE⁵

PAUL H. WOODS⁵

¹National Water Research Institute Box 5050, Burlington, Ontario Canada L7R 4A6

²department of Zoology University of Otago Dunedin, New Zealand

³Department of Biology Ottawa University Ottawa, Ontario, Canada KIN 6N5

⁴Department of Biology Portland State University P.O. Box 751, Portland Oregon, U.S.A. 97207

⁵Taupo Research Laboratory Department of Scientific and Industrial Research P.O. Box 415, Taupo, New Zealand

Abstract The physiological and growth responses of Lake Okaro phytoplankton to changes in the nutrient environment were examined over a period of ten days, long enough to allow several cell doublings. The intention was to investigate variations in performance of species exposed to different nutrient regimes, in terms of nitrogen-to-phosphorus ratios and concentration, and with varied availability of the micronutrient iron. The results were used to help interpret phytoplankton communities found in six other lakes.

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21: 539-542 0028-8330/87/2103-0539$2.50/0 © Crown copyright 1987 Received 26 May 1987; accepted 29 May 1987

PDF file of entire paper: medium quality (277K); (scanned from paper original: notes about this process)

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