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There is a common perception that terrestrial fuel spills in Antarctica are long lived and that plumes naturally degrade very … slowly. However…
The major phospholipids of Halorubrum lacusprofundi grown at 25 1C were archaeol phosphatidylglycerol, archaeol … phosphatidylglycerylsulphate and archaeol phosphatidylglycerylphosphate methyl ester.Glycolipids included a monoglycosyl archaeol and the sulphate ester of a diglycosyl archaeol.
The method traditionally used to estimate pack-ice seal abundance employs sighting surveys from ships or aircraft to … estimate the number of seals hauled out on the ice, combined with studies of haul-out behaviour to estimate the proportion … of time spent on the ice.
A large collection of ascidians was made during the CEAMARC Aurora Australis V3 cruise off Terre Adélie and George V … Land a region rarely investigated before at these depths. Sampling was performed by beam trawls and a dredge between 138°– 146° latitude East and from 150 to 1700 m depth…
The basis of using isotopic measurements to study trophic structure lies in documenting a regular and consistent pattern of isotopic enrichment with increasing trophic level. Nitrogen isotope ratios (δ 15N) in consumers become enriched in 15N by 3-4 % relative to their food…
Ice core records from Antarctic and Greenland have revealed that the last deglaciation (ca. 19,000 to 11,000 years before present) was accompanied by a ca. 80 ppmv increase in atmospheric CO2 and a sequence of large, hemispheric climate variations.
The Dome Summit South ice core from Law Dome, East Antarctica is 1200 m long and reveals an unusually high accumulation rate for Late Holocene precipitation (640 kg m2/a), dating to 90,000 years before present (BP) at its base.
Ice core records from Antarctic and Greenland have revealed that the last deglaciation (ca. 19, 000 to 11, 000 years before present) was accompanied by an 80 ppmv increase in atmospheric CO2 and a sequence of large, hemispheric climate variations.
During the summer of 2008/09, measurements were taken at 34 magnetotelluric (MT) stations along profiles totaling approximately 180 line km in the Prydz Bay region of Antarctica. Prydz Bay comprises several regions of coastal outcrops with distinct geological histories…
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)…
Species of the genus Pyramimonas (Prasinophyceae) are a common, widespread, but minor component of the Antarctic marine phytoplankton. They are … often associated with the seasonal sea-ice environment. Pyramimonas gelidicola … (McFadden, Moestrup & Wetherbee, 1982)…
Supervised dive classification is a commonly used technique for categorising time-depth profiles of diving … vertebrates. Such analyses permit the description and quantification of dive behaviour and foraging tactics, and highlight feeding locations. Ideally…
We investigate using relative amounts of … prey DNA recovered from pinniped faeces to obtain … diet composition data. Faeces were obtained from … captive sea lions being fed a diet containing three fish … species (50%, 36% and 14% by mass).
In our recent study on the population genetic structure of … short-beaked common dolphins Delphinus delphis in southern … Australia (Bilgmann et al., 2008) we unequivocally … showed a high level of genetic differentiation between the … local common dolphin population in South Australia (SA)…
Accurate measurement of fundamental parameters, such as temperature, density and composition, through the whole atmosphere and over long time scales is vitally important to identify and quantify changes in the earths climate, whether natural or anthropogenic.
The distribution of euphausiid larvae along the coast of Terre Ade´lie, Antarctica, was assessed using … oblique tows of a double-framed bongo net at 38 stations during summer 2004. Larvae of Euphausia … crystallorophias and Thysanoessa macrura were observed. For E. crystallorophias larvae…
Sea spiders are conspicuous, and often abundant, members of the Antarctic benthic community. Nymphonidae (Pycnogonida) in Southern Ocean waters … comprise over 240 species which are often diYcult to … assign due to their intraspeciWc ‘highly variable’ morphology. In particular, Nymphon australe…
Mitochondrial ribosomal DNA is commonly used in DNA-based dietary … analyses. In such studies, these sequences are generally assumed to be the … only version present in DNA of the organism of interest. However…
Zooplankton and benthic invertebrates are important components of polar lakes and often form the highest trophic level in the aquatic food web. Their biodiversity decreases towards high latitudes…
Over the past few years, co-located radar and lidar measurements have been made of ice aerosol layers in the summer mesospause region (80-95 km height) above Australia's Davis station in Antarctica.
Anthropogenic CO2 added to the atmosphere during and since the industrial revolution is entering the global ocean. Addition of extra (anthropogenic) CO2 to the ocean changes the carbonate chemistry and the pH of the surface ocean…
[1] Using Rayleigh lidar and Mesosphere-Stratosphere- … Troposphere radar at Davis Antarctica (68.6S) during the … 2005–2006 austral summer, we obtained the first Southern … Hemisphere common-volume measurements of Polar … Mesospheric Clouds (PMC) and Polar Mesosphere … Summer Echoes (PMSE).
Interactions between short-beaked common dolphins Delphinus delphis and the … fishing industry of South Australia (SA) have lead to serious concerns over the … long-term viability of the local dolphin population.