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

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 ero...

Full description

Bibliographic Details
Published in:The Lichenologist
Main Authors: Fahselt, Dianne, Maycock, Paul, Wong, Pak Yau
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1989
Subjects:
Ecology, Evolution, Behavior and Systematics
Arctic
Northwest Territories
Ellesmere Island
Canada
Sverdrup Pass
glacier*
Online Access:http://dx.doi.org/10.1017/s0024282989000587
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282989000587
Description
Summary: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.

Similar Items