New Zealand Journal of Botany abstracts

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The relations between aquatic plant communities and lake characteristics on Macquarie Island

JOCELYNE M. R. HUGHES

Department of Geography
University of Tasmania
Box 252C, Hobart, Australia 7001

Abstract Five lakes at the northern end of subantarctic Macquarie Island were sampled for water quality, substrate characteristics, and vege- tation. Two lakes have nutrient-rich waters and organic substrates. The other three lakes are oli- gotrophic with coarse inorganic substrates. Myrio- phyllum triphyllum Orchard is widespread in the nutrient-rich lakes, along with aquatic bryophytes and algae. Aquatic angiosperms are mostly absent from the oligotrophic lakes. It is suggested that the greater biomass in some of the lakes is due to nutrients derived from deposition of sediment from the surrounding basin.

Keywords Aquatic macrophytes; Macquarie Island; subantarctic lakes; limnology; lakes; vege- tation; water quality; sediment; substrate

Received 26 July 1985; accepted 23 September 1985
New Zealand Journal of Botany, 1986, Vol. 24: 271-278
0028-825X/86/2402-0271 $2.50/0 © Crown copyright 1986 271

PDF file of entire paper: medium quality (534K); (scanned from paper original: notes about this process)

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