Publications matching your search query
Results 151 to 175 of 269
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…
The spatio-temporal variability in the upwelling of iron-rich Upper Circumpolar Deep Water (UCDW) is thought to have a significant impact on primary production in the Southern Ocean, since iron has been shown to be a limiting nutrient in an otherwise high nutrient region.
The ground layer turbulence at Dome C is the cause for more than 90% of the total turbulence column. While the height … of this layer has been currently measured to be approximately 30m, no long term statistics is available from this part of … the atmosphere.
The height of the atmospheric boundary layer on the Antarctic plateau is of particular importance to designers of optical … telescopes for Antarctica.
Background: Prey DNA from diet samples can be used as a dietary marker; yet current methods for prey detection require a … priori diet knowledge and/or are designed ad hoc, limiting their scope. I present a general approach to detect diverse prey … in the feces or gut contents of predators.
PILOT (the Pathfinder for an International Large Optical Telescope) is a proposed Australian/European optical/infrared … telescope for Dome C on the Antarctic Plateau, with target first light in 2012. The telescope is 2.4m diameter, with … overall focal ratio f/10, and a 1 degree field-of-view.
The unique atmospheric characteristics found at Dome C on the Antarctic plateau offer significant … advantages for the operation of adaptive optics systems.
We investigated whether diet composition determined from stable-isotope analysis … (SIA) was similar to that determined from stomach content analysis for Ad¨¦lie penguins Pygoscelis … adeliae.
Line-transect distance sampling is a widely used method for estimating animal density from aerial surveys. Analysis of line-transect distance data usually relies on a requirement that the statistical distribution of distances of animal … groups from the transect line is uniform.
1. The crabeater seal … Lobodon carcinophaga … is considered to be a key species in the krill-based foodweb … of the Southern Ocean. Reliable estimates of the abundance of this species are necessary to … allow the development of multispecies, predator…
In September–October 2005, the juxtaposition of low- and high-pressure anomalies at … 130W and 60W, respectively, created strong and persistent northerly airflow across the … West Antarctic Peninsula (WAP). This had a major impact on regional sea ice conditions…
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…
Paratrochammina minutissima n. sp. is described from … Abraxas and Ace Lakes in the Vestfold Hills, East … Antarctica. The species is characterized by very small size … (120 mm diameter), 4K chambers in the final whorl…
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.
CCAMLR Conservation Measure 25-02 requires Spanish-system longline vessels to attach 8.5 kg weights at 40 m intervals on longlines to minimise interactions with seabirds. The weights typically used are collections of rocks enclosed in netting bags.
Statistically significant (at the 95% significance level) changes in daily cloud cover are … found to occur globally over land coincident with extreme increases in ‘fair-weather’ … measurements of vertical electric field (Ez) measured at Vostok, Antarctica.
The influence of biotic and environmental variables on the abundance of virus-like … particles (VLP) and lysogeny was investigated by examining 10 Antarctic lakes in … the Vestfold Hills, Antarctica, in the Austral Spring.
The coupled ocean–atmosphere–ice response to variations in the Southern Annular Mode (SAM) is … examined in the National Center for Atmospheric Research (NCAR) Community Coupled Climate Model … (version 2).
Airgun ‘shots’ from seismic surveys are powerful enough to be heard across ocean basins. At … close range, though, there is extraordinarily little understanding of the potential for these intense … sounds to cause temporary or permanent hearing threshold shifts (TTS/PTS) in marine … mammals.
A conceptual, lithospheric-scale cross-section of the conjugate, oblique-slip margins of George V Land, East … Antarctica, and southeast Australia (Otway Basin) has been constructed based on the integration of seismic and sample … data.
Human-induced changes to natural systems can cause major disturbances to fundamental … ecological and population processes and result in local extinctions and secondary contacts … between formerly isolated species. Extensive fur seal harvesting during the nineteenth … century on Macquarie Island…
A series of nutrient-amended microcosms was used to investigate changing microbial communities during biodegradation in … hydrocarbon-contaminated Antarctic soils at 4, 10 and 42 °C. Although sample heterogeneity resulted in no statistically significant … reduction in total petroleum hydrocarbons…
Controlled Release Nutrient sources assist in the bioremediation of hydrocarbon spills by stimulating microbial activity. However, freeze–thaw activity might result in splitting of fertilizer pellets with the uncontrolled release of nutrients. We examined … the role of freeze…
We describe the circulation and seasonal development of the upper ocean … in the Seasonal Ice Zone (SIZ) of the Southern Ocean along 140°E. The 140°E section … was repeated four times between November 2001 and March 2002, spanning the period … from early spring to autumn.
Abstract Since it is the largest glacier system in Antarctica, the Lambert Glacier basin plays an important role in the mass balance of the overall Antarctic ice sheet.