New Zealand Journal of Marine and Freshwater Research abstracts

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Buoyancy regulation by Microcystis in Lake Okaro

ANTHONY E. WALSBY ¹

GREGORY K. McALLISTER²

¹Department of Botany University of Bristol Bristol BS8 1UG, United Kingdom

²Department of Biological Sciences University of Waikato Hamilton, New Zealand

Abstract In Lake Okaro (see Vincent et al.: p. 509 this issue) for site description), a species of Microcystis produced large spherical colonies which floated rapidly when buoyant and sank rapidly when not. This organism exhibited a very clear-cut buoyancy change in response to light intensity, which would provide it with the ability to make vertical migrations over considerable depths, even when some degree of mixing occurs.

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21: 521-524 0028-8330/87/2103-0521$2.50/0 © Crown copyright 1987 Received 26 May 1987; accepted 29 May 1987

PDF file of entire paper: medium quality (354K); (scanned from paper original: notes about this process)

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