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Changes in Subantarctic Heard Island Vegetation at Sites Occupied by Poa annua, 1987-2000
Citation
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
Abstract
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 |
| Downloads: | 0 |
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