Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island
Subantarctic Macquarie Island has substantial areas of feldmark on its plateau above 200 m altitude. Samples of the substrate (5.5 cm in depth) from bare areas of feldmark contained viable propagules of bryophyte species found at adjacent and distant sites on the island. In laboratory conditions pro...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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Regents of the Univ. of Colorado
1999
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:85602 2023-05-15T17:09:52+02:00 Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island Bergstrom, D. M. Selkirk, P. M. 1999-01-01 https://espace.library.uq.edu.au/view/UQ:85602 eng eng Regents of the Univ. of Colorado doi:10.2307/1552610 issn:1523-0430 Environmental Sciences Geography Physical 270703 Terrestrial Ecology C1 Journal Article 1999 ftunivqespace https://doi.org/10.2307/1552610 2020-08-04T04:15:05Z Subantarctic Macquarie Island has substantial areas of feldmark on its plateau above 200 m altitude. Samples of the substrate (5.5 cm in depth) from bare areas of feldmark contained viable propagules of bryophyte species found at adjacent and distant sites on the island. In laboratory conditions propagules of 15 bryophyte taxa germinated, allowing interpretation of reasons for bare patches in feldmark: bryophytes were successful at colonizing stable ground but when surface movement was present, burial and/or damage of propagules and young plants prevented colonization. Spherical moss polsters found in cryoturbatic areas in feldmark, however, represent a growth form that can tolerate surface movement. A conceptual model illustrating processes associated with colonization dynamics of bryophytes on feldmark terraces is presented. Ten of the 15 germinated taxa were nonlocal taxa which currently grow in plant communities at lower and hence warmer altitudes on Macquarie Island. The presence of viable propagules of these taxa provide an immediate and constant potential for dramatic vegetation change with climate change. Article in Journal/Newspaper Macquarie Island The University of Queensland: UQ eSpace Arctic, Antarctic, and Alpine Research 31 2 202 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Environmental Sciences Geography Physical 270703 Terrestrial Ecology C1 |
spellingShingle |
Environmental Sciences Geography Physical 270703 Terrestrial Ecology C1 Bergstrom, D. M. Selkirk, P. M. Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island |
topic_facet |
Environmental Sciences Geography Physical 270703 Terrestrial Ecology C1 |
description |
Subantarctic Macquarie Island has substantial areas of feldmark on its plateau above 200 m altitude. Samples of the substrate (5.5 cm in depth) from bare areas of feldmark contained viable propagules of bryophyte species found at adjacent and distant sites on the island. In laboratory conditions propagules of 15 bryophyte taxa germinated, allowing interpretation of reasons for bare patches in feldmark: bryophytes were successful at colonizing stable ground but when surface movement was present, burial and/or damage of propagules and young plants prevented colonization. Spherical moss polsters found in cryoturbatic areas in feldmark, however, represent a growth form that can tolerate surface movement. A conceptual model illustrating processes associated with colonization dynamics of bryophytes on feldmark terraces is presented. Ten of the 15 germinated taxa were nonlocal taxa which currently grow in plant communities at lower and hence warmer altitudes on Macquarie Island. The presence of viable propagules of these taxa provide an immediate and constant potential for dramatic vegetation change with climate change. |
format |
Article in Journal/Newspaper |
author |
Bergstrom, D. M. Selkirk, P. M. |
author_facet |
Bergstrom, D. M. Selkirk, P. M. |
author_sort |
Bergstrom, D. M. |
title |
Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island |
title_short |
Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island |
title_full |
Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island |
title_fullStr |
Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island |
title_full_unstemmed |
Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island |
title_sort |
bryophyte propagule banks in a feldmark on subantarctic macquarie island |
publisher |
Regents of the Univ. of Colorado |
publishDate |
1999 |
url |
https://espace.library.uq.edu.au/view/UQ:85602 |
genre |
Macquarie Island |
genre_facet |
Macquarie Island |
op_relation |
doi:10.2307/1552610 issn:1523-0430 |
op_doi |
https://doi.org/10.2307/1552610 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
31 |
container_issue |
2 |
container_start_page |
202 |
_version_ |
1766066228486471680 |