New Zealand Journal of Marine and Freshwater Research abstracts

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Photosynthetic and N₂ fixation rate changes with respect to water movements in Lake Rotongaio

ANTHONY B. VINER

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

Abstract Laboratory measurements of ¹⁴C fixation and of C2H2 reduction (nitrogenase activity for N2 fixation) were carried out on Lake Rotongaio samples (dominant organism: Anabaena sp.) to see whether the induced rate of change of photosynthesis and N₂ fixation were within the magnitude of rates of change of water movements in the lake. Ancillary observations were made on the shifts with time of in vivo fluorescence and changes of ¹⁴C fixation with an enrichment of NH₄-N nutrient. Incubation times were from 20 minutes to over 10 hours.

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21: 533. 0028-8330/87/2103-0533$2.50/0 © Crown copyright 1987 Received 13 March 1987; accepted 29 May 1987

PDF file of entire paper: medium quality (83K); (scanned from paper original: notes about this process)

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