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Molecular markers and morphological characters can help infer the colonization history of organisms. A combination of mitochondrial (mt) D-loop DNA sequences, nuclear DNA data, external measurements … and skull characteristics shows that house mice (Mus musculus)…
Spatial and temporal environmental variation in terrestrial Antarctic ecosystems are known to impact … species strongly at a local scale, but the ways in which organisms respond (e.g. physiologically, behaviourally) to such variation are poorly understood. Further…
Physiological measurements of both stress and … sex hormones are often used to estimate the consequences … of natural or human-induced change in ecological studies of … various animals. DiVerent methods of hormone measurement … exist…
Aim We examined the genetic structure among populations and regions for the … springtails Cryptopygus antarcticus antarcticus and Gomphiocephalus hodgsoni … (Collembola) to identify potential historical refugia and subsequent colonization … routes…
The Latitudinal Gradient Proiect LGP) is a successful multidisciplinary, international Antarctic … research programme. lts approach focuses on marine, terrestrial and freshwater ecosystems … along the nofth-south latitudinal gradient between nofthern Victoria Land (72 degrees S)…
The evolutionary and biogeographic history of the contemporary Antarctic terrestrial and marine biotas … reveals many components of ancient origin. For large elements of the terrestrial biota, long-term … isolation over timescales from hundreds of thousands to tens of millions of years…
Terrestrial systems in Antarctica are characterized by substantial spatial and temporal variation. However, few studies have addressed the paucity of data on metabolic responses to the unpredictable … Antarctic environment, particularly with regard to terrestrial biota.
Previous studies of Antarctic mosses … employing RAPDs have reported extraordinarily … high levels of genetic variation, even within a single … clump of moss. This is unexpected given their … extreme isolation in Antarctica and lack of sexual … reproduction. We offer an alternative explanation:
We review aspects of climate change likely to impact upon the Collembola and mites (microarthropods) of Victoria Land and the Queen Maud Mountains (VLQMM) in the Ross Sea Region of Antarctica. Five important aspects of biological and biological…
A recently developed temperature-dependent semiempirical thermodynamic ion-exchange model is used to … predict ion-exchange equilibrium behavior of a binary and ternary system onto a natural zeolite material. The … ion-exchange system involves the cations ammonium, potassium, and calcium…
A sodium-form chelating ion-exchange resin, Amberlite IRC-748, and a natural zeolite were investigated … for the exchange of copper and ammonium ions from aqueous solutions at three temperatures ((4.0, 20.0, and 40.0) ( 0.2) °C. Maximum exchange capacities were determined…
Antarctica is a continent locked in ice, with almost 99.7% of current terrain covered by permanent ice and snow, and clear evidence that, as recently as the Last Glacial Maximum (LGM), ice sheets were both thicker and much … more extensive than they are now.