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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.
Bromine explosion events that occur over first year sea ice in the polar spring cause mercury deposition and dramatically alter the oxidative capacity of the polar boundary layer. Atmospheric chemical measurements made during the Sea Ice Physics and Ecosystems eXperiment (SIPEX II)…