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Changes in Subantarctic Heard Island Vegetation at Sites Occupied by Poa annua, 1987-2000


Scott, JJ and Kirkpatrick, JB, Changes in Subantarctic Heard Island Vegetation at Sites Occupied by Poa annua, 1987-2000, Arctic, Antarctic, and Alpine Research, 37, (3) pp. 366-371. ISSN 1523-0430 (2005) [Refereed Article]

DOI: doi:10.1657/1523-0430(2005)037[0366:CISHIV]2.0.CO;2


Poa annua, the only alien plant species recorded on subantarctic Heard Island, considerably expanded its range and abundance along three transects in tundra-like vegetation on the island in the period 1987-2000. This expansion was strongly associated with increased seal disturbance, which also favored Callitriche antarctica and damaged Pringlea antiscorbutica, leading to a decrease in mean vegetation height. Expansions of Azorella selago and Poa cookii were independent of the expansion of P. annua, relating to colonization of moraines. There was no evidence of displacement of other taxa by Poa annua in areas undisturbed by seals. © 2005 Regents of the University of Colorado.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Evolutionary biology
Research Field:Biogeography and phylogeography
Objective Division:Environmental Management
Objective Group:Other environmental management
Objective Field:Other environmental management not elsewhere classified
UTAS Author:Scott, JJ (Dr Jennifer Scott)
UTAS Author:Kirkpatrick, JB (Professor James Kirkpatrick)
ID Code:34422
Year Published:2005
Web of Science® Times Cited:21
Deposited By:Geography and Environmental Studies
Deposited On:2005-08-01
Last Modified:2009-10-20

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