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Delta15N signatures of fossil peat were used to interpret past ecosystem processes on tectonically active subantarctic Macquarie Island. By comparing past vegetation reconstructed from the fossil record with present day vegetation analogues, our evidence strongly suggests that changes in the ?
Two endemic orchid species, Nematoceras dienemum and N. sulcatum, are known from sub-Antarctic Macquarie Island. Several additional orchid populations on the island are reported and cleistogamy is documented in N. dienemum for the first time. The known population sizes…
We report here the finding of a new plant virus, Stilbocarpa mosaic bacilliform badnavirus (SMBV) in Stilbocarpa polaris (Homb. et Jacq.) Gray on subantarctic Macquarie Island. This is the first vascular plant virus reported from any of the remote subantarctic islands…
Alien microbes, fungi, plants and animals occur on most of the sub-Antarctic islands and some parts of the … Antarctic continent. These have arrived over approximately the last two centuries, coincident with human … activity in the region. Introduction routes have varied…
Sub-Antarctic islands have a diversity of origins in detail but most are volcanic and very young suggesting that they are short-lived and that the distribution would have been very different a few million years ago. They contrast with the common tourist brochure concept of oceanic islands.
On the cool, moist, extremely windy … subantarctic islands, vegetation is treeless and megaherbs, tussock grasses, and cushion plants are the … dominant plant growth forms. In world terms the … subantarctic environment is an unusual one…
Using steel pins inserted into growing moss … colonies near Casey Station, Wilkes Land, continental … Antarctica, we have measured the growth rate of three … moss species: Bryum pseudotriquetrum and Schistidium … antarctici over 20 years and Ceratodon purpureus … over 10 years.
A second orchid species, Nematoceras … sulcatum M.A.Clem. et D.L.Jones, has been found on … subantarctic Macquarie Island. A history of its discovery … and recognition is provided. The morphology, biology and ecology of the new species are compared … with N. dienemum (D.L.Jones) D.L.Jones, M.A.Clem.