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Reproductive Modes of Lichens in Stressful Environments in Central Ellesmere Island, Canadian High Arctic

Published online by Cambridge University Press:  28 March 2007

Dianne Fahselt ,
Paul Maycock  and
Pak Yau Wong
Dianne Fahselt
Affiliation:
Department of Plant Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada
Paul Maycock
Affiliation:
Department of Botany, Erindale College, University of Toronto, Mississauga, Ontario L5L 1C6, Canada
Pak Yau Wong
Affiliation:
National Museum of Natural Sciences, Ottawa, Ontario K1P 6P4, Canada
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Abstract

Lichens of the most highly stressful habitats in Sverdrup Pass, Ellesmere Island, Northwest Territories, Canada, were examined for reproductive structures, as were lichens of less extreme sites within the same landform features. The study areas included twenty-two stands in a calcareous erosional mountain system and two microhabitats within the ablation zone of a valley glacier. In the most limited stands in the erosional mountains 83% of the lichens were apotheciate species and 93% of these were represented by specimens bearing apothecia. On stressful rock surfaces in the glacier fellfield most species also produced sexual fruiting bodies.

Type
Research Article
Information
The Lichenologist , Volume 21 , Issue 4 , October 1989 , pp. 343 - 353
Copyright
Copyright © British Lichen Society 1989

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