Optimal stroke frequency during diving activity in seabirds
Diving animals have to counter both drag and buoyancy when moving through the water column. The magnitude of these forces depends upon an animal’s swim speed and current depth. Feet, […]
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Read more of: Optimal stroke frequency during diving activity in seabirds
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EPICA Dome C record of glacial and interglacial intensities
Read more of: EPICA Dome C record of glacial and interglacial intensitiesClimate models show strong links between Antarctic and global temperature both in future and in glacial climate simulations. Past Antarctic temperatures can be estimated from measurements of water stable isotopes […]
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Free as a bird? Activity patterns of albatrosses during the nonbreeding period
Read more of: Free as a bird? Activity patterns of albatrosses during the nonbreeding periodThis is the first comprehensive study of at-sea activity patterns of albatrosses during the nonbreeding period, based on data from combination geolocator–immersion loggers deployed on the wandering albatross Diomedea exulans, […]
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Echiniscus corrugicaudatus (Heterotardigrada; Echiniscidae) a new species from Ellsworth Land, Antarctica
Read more of: Echiniscus corrugicaudatus (Heterotardigrada; Echiniscidae) a new species from Ellsworth Land, AntarcticaEchiniscus corrugicaudatus sp. nov., (Heterotardigrada; Echiniscidae) was found in the limited vegetation from the inland nunataks of Ellsworth Land, West Antarctica. The tardigrade fauna of this a rarely explored region […]
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Contrasting phylogeographical patterns for springtails reflect different evolutionary histories between the Antarctic Peninsula and continental Antarctica
Read more of: Contrasting phylogeographical patterns for springtails reflect different evolutionary histories between the Antarctic Peninsula and continental AntarcticaWe 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, and to […]
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Metabolic rate, genetic and microclimate variation among springtail populations from sub-Antarctic Marion Island
Read more of: Metabolic rate, genetic and microclimate variation among springtail populations from sub-Antarctic Marion IslandMeasurement of metabolic rates (made at 10A degrees C) of individuals of the springtail Cryptopygus antarcticus travei from six geographically distinct populations on sub-Antarctic Marion Island were combined with mitochondrial […]
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Eretmoptera murphyi: pre-adapted to survive a colder climate
Read more of: Eretmoptera murphyi: pre-adapted to survive a colder climateDuring the late 1960s, larvae of the flightless midge Eretmoptera murphyi Schaeffer were accidentally transferred from the sub-Antarctic island of South Georgia to Signy Island in the maritime Antarctic. Higher […]
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Foraging behaviour of King Penguins (Aptenodytes patagonicus) in relation to predictable mesoscale oceanographic features in the Polar Front Zone to the north of South Georgia
Read more of: Foraging behaviour of King Penguins (Aptenodytes patagonicus) in relation to predictable mesoscale oceanographic features in the Polar Front Zone to the north of South GeorgiaMarine predators are thought to utilise oceanic features adjusting their foraging strategy in a scale-dependent manner. Thus, they are thought to dynamically alter their foraging behaviour in response to environmental […]
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Ultrastructure of pedal muscle as a function of temperature in nacellid limpets
Read more of: Ultrastructure of pedal muscle as a function of temperature in nacellid limpetsTemperature and mitochondrial plasticity are well studied in fishes, but little is known about this relationship in invertebrates. The effects of habitat temperature on mitochondrial ultrastructure were examined in three […]
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Growth and mass wasting of volcanic centers in the northern South Sandwich arc, South Atlantic, revealed by new multibeam mapping
Read more of: Growth and mass wasting of volcanic centers in the northern South Sandwich arc, South Atlantic, revealed by new multibeam mappingNew multibeam (swath) bathymetric sonar data acquired using an EM120 system on the RRS James Clark Ross, supplemented by sub-bottom profiling, reveals the underwater morphology of a not, vert, similar […]
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Estimation of Antarctic ozone loss from ground-based total column measurements
Read more of: Estimation of Antarctic ozone loss from ground-based total column measurementsThe passive tracer method is used to estimate ozone loss from ground-based measurements in the Antarctic. A sensitivity study shows that the ozone depletion can be estimated within an accuracy […]
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Hypothesis for mega-outburst flooding from a palaeo-subglacial lake beneath the East Antarctic Ice Sheet
Read more of: Hypothesis for mega-outburst flooding from a palaeo-subglacial lake beneath the East Antarctic Ice SheetSubglacial outburst floods at the margins of the Antarctic and Laurentide Ice Sheets have been linked to changes in global ocean circulation and climate. The impact of palaeo-hydrological systems beneath […]