11317 to 11328 of 14026 results
-
-
Valdivian ecosystems in the Late Cretaceous and Early Tertiary of Antarctica: further evidence from myrtaceous and eucryphiaceous fossil wood
Read more of: Valdivian ecosystems in the Late Cretaceous and Early Tertiary of Antarctica: further evidence from myrtaceous and eucryphiaceous fossil woodCool temperate rainforests growing on the flanks of the Andes and along the Coastal Range in Valdivia (Chile) today provide the closest analogue for the fossil floras of Antarctica during […]
-
Phytoplankton biomass and residual nitrate in the pelagic ecosystem
Read more of: Phytoplankton biomass and residual nitrate in the pelagic ecosystemWe develop and analyse a simple, two-compartment (chlorophyll and nitrate) model of the surface mixed layer of the ocean. The mixed-layer depth is modulated intermittently to simulate the effects of […]
-
One hundred fifty-year record of lead isotopes in Antarctic snow from Coats Land
Read more of: One hundred fifty-year record of lead isotopes in Antarctic snow from Coats LandA record of the concentrations of Pb and Ba and the isotopic composition of Pb has been established for a remote, low accumulation site in the Atlantic sector of Antarctica […]
-
The location and rate of dayside reconnection during an interval of southward interplanetary magnetic field
Read more of: The location and rate of dayside reconnection during an interval of southward interplanetary magnetic fieldUsing ionospheric data from the SuperDARN radar network and a DMSP satellite we obtain a comprehensive description of the spatial and temporal pattern of dayside reconnection. During a period of […]
-
Phylogenetic relationships among cirrate octopods (Mollusca: Cephalopoda) resolved using mitochondrial 16S ribosomal DNA sequences
Read more of: Phylogenetic relationships among cirrate octopods (Mollusca: Cephalopoda) resolved using mitochondrial 16S ribosomal DNA sequencesPhylogenetic relationships among the cirrate octopods (Mollusca: Cephalopoda) were investigated using partial sequences of the 16S rRNA mitochondrial gene. The derived phylogeny supports the traditional separation of cirrate families based […]
-
Effects of satellite transmitters on albatrosses and petrels
Read more of: Effects of satellite transmitters on albatrosses and petrelsEffects of deployment of miniaturized transmitters and loggers have been well studied in penguins, but much less so in flying seabirds. We examined the effects of satellite tag (platform terminal […]
-
Chick metabolic rate and growth in three species of albatross: a comparative study
Read more of: Chick metabolic rate and growth in three species of albatross: a comparative studyThe relative importance of genetic vs. environmental factors in determining the pattern of avian post-embryonic development is much debated. Previous cross-fostering of albatrosses suggested that although inter-specific variation in growth […]
-
Control of provisioning in grey-headed albatrosses (Thalassarche chrysostoma): do adults respond to chick condition?
Read more of: Control of provisioning in grey-headed albatrosses (Thalassarche chrysostoma): do adults respond to chick condition?Recent studies have been equivocal in determining whether long-lived seabirds are able to respond to chick nutritional status and regulate provisioning rates accordingly. With some exceptions, albatrosses and petrels that […]
-
Anomalous resistivity in non-Maxwellian plasmas
Read more of: Anomalous resistivity in non-Maxwellian plasmasVlasov simulations of the current-driven ion-acoustic instability produced in Maxwellian and non-Maxwellian (Lorentzian, kappa = 2) electron-ion plasma with number density 7 x 10(6) cm(-3), reduced mass ratio m(i)/m(e) = […]
-
Numerical weather prediction model performance over high southern latitudes
Read more of: Numerical weather prediction model performance over high southern latitudesIncreasingly, output from numerical weather prediction (NWP) models is being used for real-time weather forecasts for the Antarctic and for Antarctic-related climate diagnostics studies. Evidence is presented that indicates that […]
-
Reduced oxygen at high altitude limits maximum size
Read more of: Reduced oxygen at high altitude limits maximum sizeThe trend towards large size in marine animals with latitude, and the existence of giant marine species in polar regions have long been recognized, but remained enigmatic until a recent […]