A classification of subantarctic Heard Island vegetation

Bergstrom, D. M., Whinam, J. and Belbin, L. (2002) A classification of subantarctic Heard Island vegetation. Arctic Antarctic And Alpine Research, 34 2: 169-177.


Author Bergstrom, D. M.
Whinam, J.
Belbin, L.
Title A classification of subantarctic Heard Island vegetation
Journal name Arctic Antarctic And Alpine Research   Check publisher's open access policy
ISSN 1523-0430
Publication date 2002-05
Sub-type Article (original research)
DOI 10.2307/1552468
Volume 34
Issue 2
Start page 169
End page 177
Total pages 9
Place of publication University Colorado, Boulder, CO, USA
Publisher Inst Arctic Alpine Research
Collection year 2002
Language eng
Subject C1
270703 Terrestrial Ecology
771103 Living resources (flora and fauna)
Abstract The vascular and bryophyte floras of subantarctic Heard Island were classified using cluster analysis into six vegetation communities: Open Cushion Carpet, Mossy Feldmark, Wet Mixed Herbfield, Coastal Biotic Vegetation, Saltspray Vegetation, and Closed Cushion Carpet. Multidimensional scaling indicated that the vegetation communities were not well delineated but were continua. Discriminant analysis and a classification tree identified altitude, wind, peat depth, bryophyte cover and extent of bare ground, and particle size as discriminating variables. The combination of small area, glaciation, and harsh climate has resulted in reduced vegetation variety in comparison to those subantarctic islands north of the Antarctic Polar Front Zone. Some of the functional groups and vegetation communities found on warmer subantarctic islands are not present on Heard Island, notably ferns and sedges and fernbrakes and extensive mires, respectively.
Keyword Environmental Sciences
Geography, Physical
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Biological Sciences Publications
 
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