Results 41 to 50 of about 160,452 (308)

The variability of surface radiation fluxes over landfast sea ice near Zhongshan station, east Antarctica during austral spring

open access: yesInternational Journal of Digital Earth, 2019
Surface radiative fluxes over landfast sea ice off Zhongshan station have been measured in austral spring for five springs between 2010 and 2015.
Lejiang Yu   +9 more
doaj   +1 more source

Anisotropy of magnetic susceptibility of Cretaceous to Eocene volcanic rocks from southern part of King George Island, West Antarctica [PDF]

open access: yesPolish Polar Research
The anisotropy of magnetic susceptibility (AMS) was determined for 147 specimens from 14 sites of Cretaceous to Eocene volcanics from south-central King George Island.
Jerzy Nawrocki, Tomasz Werner
doaj   +1 more source

Mesoporous PU/PEDOT:PSS Electrodes Reveal Population‐Level Stochastic Bioelectrical Dynamics in Marine Diatoms

open access: yesAdvanced Science, EarlyView.
Mesoporous mixed ionic‐electronic PU/PEDOT: PSS electrodes enable label‐free detection of stochastic extracellular bioelectrical dynamics in living Phaeodactylum tricornutum. Living diatoms actively modulate interfacial ionic dynamics, establishing stochastic electrochemical noise as a sensitive probe of microbial bioelectrochemical activity and a new ...
David M. S. Silva   +7 more
wiley   +1 more source

Austrocedrus from the Late Cretaceous of Antarctica and its implications for the early evolution of southern cypresses (Callitroideae, Cupressaceae)

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise The modern distribution of the southern cypresses, Callitroideae (Cupressaceae), reflects a classic Gondwanan distribution. The initial diversification of Callitroideae is estimated to have occurred during the Cretaceous, yet fossils from this period are rare, hampering our understanding of its early evolutionary history.
Kelly C. Pfeiler   +5 more
wiley   +1 more source

Origin, evolution and biogeographic dynamics of the European rabbit (Oryctolagus cuniculus) in Southwestern Europe

open access: yesThe Anatomical Record, EarlyView.
Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley   +1 more source

Different shape but the same topographical complexity—The lingual gross anatomy of the Saimaa (Pusa saimensis) and Baltic ringed seals (Pusa hispida botnica)

open access: yesThe Anatomical Record, EarlyView.
Abstract Despite the distinctly different shapes of their tongues, the tongue gross anatomy of Saimaa ringed seal closely resembled that of Baltic ringed seal. There were no differences in the extrinsic and intrinsic tongue muscles or their associated vascularization and innervation between Saimaa and Baltic ringed seals.
Juha Laakkonen, Heini Nihtilä
wiley   +1 more source

Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions

open access: yesMeteorologische Zeitschrift, 1994
Various parameterization schemes for the downward long-wave radiation at the Earth's surface which have been frequently applied in sea ice and snow cover models are tested with the aid of one year's measurements at the German stations "Koldewey" and ...
Gert König-Langlo, Ernst Augstein
doaj   +1 more source

Partners or passengers? Revisiting the association between diatoms and aquatic animals

open access: yesBiological Reviews, EarlyView.
ABSTRACT Numerous studies have revealed the importance of research on the communities capable of colonizing animal surfaces (epibionts) and the animals on which they live (basibionts). Very few studies have considered epizoic diatoms, and there are gaps and biases in our knowledge, including the choice of basibionts, the methods used, and the habitats ...
Gianluca Vacca   +2 more
wiley   +1 more source

Study of Ecophysiological Responses of the Antarctic Fruticose Lichen Cladonia borealis Using the PAM Fluorescence System under Natural and Laboratory Conditions

open access: yesPlants, 2020
Antarctic lichens have been used as indicators of climate change for decades, but only a few species have been studied. We assessed the photosynthetic performance of the fruticose lichen Cladonia borealis under natural and laboratory conditions using the
Sung Mi Cho   +3 more
doaj   +1 more source

On the origin of Antarctic marine benthic community structure [PDF]

open access: yes, 2005
Environmental conditions fostering marine communities around Antarctica differ fundamentally from those in the rest of the world's oceans, particularly in terms of pronounced climatic fluctuations and extreme cold.
Thatje, S.   +5 more
core   +1 more source

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