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Procellariiform seabirds (petrels, albatrosses and shearwaters) navigate vast distances … over seemingly featureless ocean habitat by mechanisms that are not well understood. These birds … have large olfactory bulbs, and the use of smell has been implicated in both foraging and homing … behavior.
For the first time, the cyanobacterial diversity from microbial mats in lakes of … Eastern Antarctica was investigated using microscopic and molecular approaches. The present study assessed the biogeographical distribution of cyanobacteria in … Antarctica.
1. Microbial plankton dynamics in an ultra-oligotrophic epishelf lake (Beaver Lake, Antarctica) were investigated over an austral summer (December 2002 to January 2003). The aim was to characterise carbon cycling in an environmentally extreme lake. 2.
A common technique for comparing the in situ microbial potential for mineralisation of petroleum hydrocarbons in different environments or under different remediation strategies, is by use of radiolabelled tracer studies.
Around 145 different non-marine algae have been identified from the Windmill Islands region, Antarctica. About 24 of these occur in the snow. Nearly half of these, which includes all the dominant snow algae, complete their life cycles in the snow and do not grow elsewhere.
The dive duration of 16 underyearling (6-12 months old) southern elephant seals during their second trip to sea was investigated using geolocating time-depth recorders. Underyearling seals had a lesser diving ability, with respect to duration and depth, than adult southern elephant seals.
We investigate ice shelf rift propagation using a … combination of GPS and seismic measurements near the … tip of an active rift in the Amery Ice Shelf. These … measurements reveal that propagation occurs in episodic … bursts…
Unmodelled sub-daily periodic signals can propagate … into time series of daily geodetic coordinates and tropospheric … estimates at various different frequencies. Geophysical … interpretations of geodetic products, particularly at seasonal … timescales…
Anthropogenic noise generated through travel in the Antarctic has the potential to affect the region’s … wildlife. Weddell seals (Leptonychotes weddellii) in particular can be exposed to anthropogenic noise because they … live under, and breed on, the fast ice on which humans travel.
The effects of diesel fuel and three lubricating oils on microbial communities in marine sediment were investigated in a field experiment at Casey Station, Antarctica. Sediment from a pristine site in Antarctica was treated with either Special Antarctic Blend (SAB) diesel, a synthetic lubricant…
The ‘Norfolk Meeting’ was held in November 2005 as a joint IWC SO GLOBEC initiative to … outline a program of work to expedite integrative circumpolar analyses of existing cetacean … data series for the Antarctic. Our aim was to use the results of these analyses to summarise, on a circumpolar scale…
Methanesulphonic acid (MSA) measured along ice cores was largely used as a marker of … past marine biogenic activity because of it is formed by atmospheric oxidation of … dimethylsulphyde (DMS), emitted by metabolic processes of marine biota.
In late 2004 a multi-national, interdisciplinary study coordinated by the Alfred Wegener … Institute for Polar and Marine Research, Germany, was carried out in the Western Weddell … Sea. A drifting station, Ice Station POLarstern [ISPOL] formed the core component of this … cruise…
The microparticle record from the Dome Summit South ice core, Law Dome, East Antarctica … is investigated using a Coulter Multisizer to provide concentration and size distribution at … selected depths. This core site has an unusually high accumulation rate (640 kg m2/a) during … the Late Holocene…
Dome A is the highest point on the surface of the East Antarctic ice sheet and the highest … ice feature in Antarctica. In January 2005 a team from the Chinese National Antarctic … Research Expeditions (CHINARE)…
The internal structure of the Law Dome ice cap is being investigated by studying ice cores obtained from several sites along the summit - Cape Folger line. Profiles of measured physical properties for four of the ice cores from near the margin of the ice cap are presented.
As with human cytomegalovirus (HCMV) infection of humans, murine CMV (MCMV) infection is … widespread in its natural host, the house mouse Mus domesticus, and may consist of mixed … infection with different CMV isolates.
This paper provides the first evidence to relate Leopard Seal numbers with sea-ice … concentrations in a region of the Eastern Antarctic pack ice and to propose a biological … mechanism (krill availability) to link the two. Leopard seals have been periodic, and sometimes numerous…
Monitoring of zooplankton communities in the northern hemisphere has provided valuable … insights into plankton / climate interactions, and changes to plankton communities have been … shown to impact significantly on higher trophic levels.
Regionalisation algorithms attempt to partition a broad spatial area into discrete spatial regions, each with relatively homogeneous environmental or biotic conditions. Marine regionalisations commonly make use of data that can be represented naturally in a network context…
The international cooperation that makes Antarctica a continent for science has enabled … observations of the Antarctic middle atmosphere that are not possible anywhere else on … Earth. Atmospheric radars operated by Australia (Davis), Japan (Syowa), the UK and the … USA (Rothera)…
A field experiment investigating the effect of oil contamination on benthic microbial communities was conducted near Casey Station, East Antarctica.
The atmospheric tides are a dominant and persistent feature of the mesosphere and lowerthermosphere … region of the atmosphere which spans from 80 to 120km above the Earth’s … surface. The tides…
A mechanism where reconnection between the Solar Interplanetary Magnetic Field and the … Geomagnetic field, deposits energy in the polar atmosphere was first observed in Antarctica. The propagation and attenuation of plasma waves occurs in the polar ionospheric waveguide … at 300km altitude…
Considerable debate is ongoing as to whether there is a temperature difference between the … northern and southern hemisphere polar mesopause regions of the atmosphere. In part this … debate has been fuelled by the reported lack of southern hemisphere Polar Mesosphere … Summer Echoes (PMSE)…