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Seasonal changes in the photosynthetic and photoprotective pigment content of three species of Antarctic moss; Grimmia antarctici, Bryum pseudotriquetrum and Ceratodon purpureus were explored in relation to a range of environmental variables over the growing season in the Windmill Islands…
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)…
Distribution of the arsenic species total inorganic arsenic [As(V+III)], arsenite [As(III)], monomethyl arsenic (MMA), and dimethyl arsenic (DMA) was studied in the Subantarctic Zone (SAZ) of the Southern Ocean, south of Australia, during the austral autumn (March 1998). As(V)…
Seasonal surface water nitrate and phosphate depletions were calculated for the Subantarctic Zone (SAZ) and Polar Frontal Zone (PFZ) of the Southern Ocean along the World Ocean Circulation Experiment SR3 repeat section south of Tasmania, Australia, and three other transects slightly to the west.
Increases in the anthropogenic CO2 inventory for Southern Ocean waters to the south of Australia were estimated by comparing measurements made 28 years apart in 1968 and 1996. For this period…
Two simulation programmes have been written as aids to the design of Fabry-Perot interferometers. The use of the Modulation Transfer Function (MTF) vis-a-vis the Aperture Function is discussed and an example given. Other features of the simulations are described briefly.
We have obtained wide-field thermal infrared (IR) images of the Carina nebula, using the SPIREX/Abu telescope at the … South Pole. Emission from polycyclic aromatic hydrocarbons (PAHs) at 3.29um, a tracer of photodissociation … regions (PDRs)…
To determine the foraging space of Emperor penguins Aptenodytes forsteri in winter 12 females from Auster colony (13 400 pairs) were equipped with satellite transmitters and time-depth recorders before departing on their 77 ± 8 d winter (June-August) foraging trip.
The morphological diversity of naturally occurring populations of the chroococcoid cyanobacterial genus Synechococcus were investigated by electron microscopy. Analysis of samples from a coastal Tasmanian site (38° S 148° E) and from south of the Sub Tropical Convergence (54°S 146°E)…
Three mutant polypeptides of the type I 37-residue winter flounder antifreeze protein have been synthesized. All four threonine residues in the native peptide have been mutated to serine…
The RAPD technique (Random Amplified Polymorphic DNA) was used to assess the level of genetic diversity in Bryum argenteum from Ross Island and Southern Victoria Land, Antarctica. Samples were collected from three transects at different sites…
Considered from a functional ecological perspective, Antarcticas present-day terrestrial biota is the product of two sets of limiting factors: the continents isolation from sources of immigrant propagules and the severe environmental stresses to which successful immigrants are exposed.