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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…
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.
We are using techniques of molecular genetics to investigate the extent of genetic diversity in Antarctic mosses. The RAPD technique has proven especially useful in demonstrating that these mosses exhibit extensive genetic variation (levels being similar to those in temperate regions)…
The RAPD technique (Random Amplified Polymorphic DNA) was used to assess the level of genetic diversity in Bryum pseudotriquetrum from Southern Victoria Land, Antarctica. Isolates were collected from two transects…
A detailed study was made of the extent of genetic variation within populations of two moss species, Bryum argenteum and Henediella heimii, from the Garwood Valley in Southern Victoria Land, Antarctica. RAPD technology was used to analyse over 30 clumps of each species…