Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island

Bergstrom, D. M. and Selkirk, P. M. (1999) Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island. Arctic Antarctic And Alpine Research, 31 2: 202-208. doi:10.2307/1552610

Author Bergstrom, D. M.
Selkirk, P. M.
Title Bryophyte propagule banks in a feldmark on subantarctic Macquarie Island
Journal name Arctic Antarctic And Alpine Research   Check publisher's open access policy
ISSN 1523-0430
Publication date 1999
Sub-type Article (original research)
DOI 10.2307/1552610
Volume 31
Issue 2
Start page 202
End page 208
Total pages 7
Place of publication Colorado, USA
Publisher Regents of the Univ. of Colorado
Collection year 1999
Language eng
Subject 270703 Terrestrial Ecology
Abstract 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.
Keyword Environmental Sciences
Geography, Physical
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 19 Aug 2007, 15:45:34 EST