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Poa annua is the most widespread alien species in the sub-Antarctic, occurring on all major island groups and is invasive and spreading on the Antarctic Peninsula. P. annua colonises areas disturbed by human activity, seal wallows, penguin rookeries and glacial moraines.
Poa annua L. is the most widespread weed in the sub-Antarctic, present on all major island groups and on the Antarctic Peninsula. Its ability to withstand heavy grazing has enabled it to spread significantly on islands with introduced herbivores.
Floral development of two alien species (Cerastium fontanum, Poa annua) were monitored through the summer of 2013/14 at three different altitudinal sites (coastal, hillside and plateau) on the North eastern end of sub-Antarctica Macquarie Island.
Poa annua is a non-native grass found in Antarctica and the sub-Antarctic. It has a restricted distribution on Heard Island but is common and widespread on Macquarie Island, both World Heritage Areas.
The sub-Antarctic islands are some of the least inhabited and most protected ecosystems in the world. Due to their isolation and low human visitation they have escaped the worst effects of alien plant invasion.
The sub-Antarctic islands are some of … the least inhabited and most protected … ecosystems in the world. Due to their … isolation and low human visitation they … have escaped the worst effects of alien … plant invasion.