Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada
Abstract In the recently deglaciated zone of a valley glacier in Central Ellesmere Island the mean period of time before the onset of colonization on bare rock surfaces was estimated to be about 80 years. The first species to establish was Xanthoria elegans , followed by Lecanora crenulata and Umbil...
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Language: | English |
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Cambridge University Press (CUP)
1988
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Online Access: | http://dx.doi.org/10.1017/s0024282988000295 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282988000295 |
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crcambridgeupr:10.1017/s0024282988000295 2024-03-03T08:42:01+00:00 Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada Fahselt, Dianne Maycock, Paul F. Svoboda, Josef 1988 http://dx.doi.org/10.1017/s0024282988000295 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282988000295 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms The Lichenologist volume 20, issue 3, page 253-268 ISSN 0024-2829 1096-1135 Ecology, Evolution, Behavior and Systematics journal-article 1988 crcambridgeupr https://doi.org/10.1017/s0024282988000295 2024-02-08T08:42:59Z Abstract In the recently deglaciated zone of a valley glacier in Central Ellesmere Island the mean period of time before the onset of colonization on bare rock surfaces was estimated to be about 80 years. The first species to establish was Xanthoria elegans , followed by Lecanora crenulata and Umbilicaria virginis approximately 20 years later. Summer temperature appeared to be one factor which affected lichen establishment in recently deglaciated bare areas in the High Arctic. Warmer microsites were identified as preferred locations for thallus establishment; these, therefore, constitute ideal sites for studies of thallus initiation under natural conditions. Following the retreat of a glacier from its most advanced Little Ice Age position, 16 species of saxicolous lichens have become established on bare rock debris in the icefree zone, but in nine transects only five species had a constancy of 80% or more. Lichen diversity in this successional photocommunity was comparable to that in a nearby pre-Little Ice Age landscape with more varied substrata. Article in Journal/Newspaper Arctic Ellesmere Island glacier* Sverdrup Pass Cambridge University Press Arctic Ellesmere Island Canada Bare Rock ENVELOPE(-45.589,-45.589,-60.704,-60.704) Sverdrup Pass ENVELOPE(-80.498,-80.498,79.135,79.135) The Lichenologist 20 3 253 268 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Fahselt, Dianne Maycock, Paul F. Svoboda, Josef Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
Abstract In the recently deglaciated zone of a valley glacier in Central Ellesmere Island the mean period of time before the onset of colonization on bare rock surfaces was estimated to be about 80 years. The first species to establish was Xanthoria elegans , followed by Lecanora crenulata and Umbilicaria virginis approximately 20 years later. Summer temperature appeared to be one factor which affected lichen establishment in recently deglaciated bare areas in the High Arctic. Warmer microsites were identified as preferred locations for thallus establishment; these, therefore, constitute ideal sites for studies of thallus initiation under natural conditions. Following the retreat of a glacier from its most advanced Little Ice Age position, 16 species of saxicolous lichens have become established on bare rock debris in the icefree zone, but in nine transects only five species had a constancy of 80% or more. Lichen diversity in this successional photocommunity was comparable to that in a nearby pre-Little Ice Age landscape with more varied substrata. |
format |
Article in Journal/Newspaper |
author |
Fahselt, Dianne Maycock, Paul F. Svoboda, Josef |
author_facet |
Fahselt, Dianne Maycock, Paul F. Svoboda, Josef |
author_sort |
Fahselt, Dianne |
title |
Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada |
title_short |
Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada |
title_full |
Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada |
title_fullStr |
Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada |
title_full_unstemmed |
Initial Establishment of Saxicolous Lichens Following Recent Glacial Recession in Sverdrup Pass, Ellesmere Island, Canada |
title_sort |
initial establishment of saxicolous lichens following recent glacial recession in sverdrup pass, ellesmere island, canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
1988 |
url |
http://dx.doi.org/10.1017/s0024282988000295 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282988000295 |
long_lat |
ENVELOPE(-45.589,-45.589,-60.704,-60.704) ENVELOPE(-80.498,-80.498,79.135,79.135) |
geographic |
Arctic Ellesmere Island Canada Bare Rock Sverdrup Pass |
geographic_facet |
Arctic Ellesmere Island Canada Bare Rock Sverdrup Pass |
genre |
Arctic Ellesmere Island glacier* Sverdrup Pass |
genre_facet |
Arctic Ellesmere Island glacier* Sverdrup Pass |
op_source |
The Lichenologist volume 20, issue 3, page 253-268 ISSN 0024-2829 1096-1135 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0024282988000295 |
container_title |
The Lichenologist |
container_volume |
20 |
container_issue |
3 |
container_start_page |
253 |
op_container_end_page |
268 |
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