5701 to 5712 of 14084 results
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Human-mediated dispersal of terrestrial species between Antarctic biogeographic regions: a preliminary risk assessment
Read more of: Human-mediated dispersal of terrestrial species between Antarctic biogeographic regions: a preliminary risk assessmentThe distribution of terrestrial biodiversity within Antarctica is complex, with 16 distinct biogeographic regions (Antarctic Conservation Biogeographic Regions) currently recognised within the Antarctic continent, Peninsula and Scotia Arc archipelagos of […]
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Surveys reveal increasing and globally important populations of south polar skuas and Antarctic shags in Ryder Bay (Antarctic Peninsula)
Read more of: Surveys reveal increasing and globally important populations of south polar skuas and Antarctic shags in Ryder Bay (Antarctic Peninsula)Despite their importance in ecosystems, population sizes and trends are unknown for many seabirds, including in the Antarctic. Here we report on the first comprehensive survey of south polar skuas […]
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Sea salt aerosol production via sublimating wind-blown saline snow particles over sea ice: parameterizations and relevant microphysical mechanisms
Read more of: Sea salt aerosol production via sublimating wind-blown saline snow particles over sea ice: parameterizations and relevant microphysical mechanismsBlowing snow over sea ice has been proposed as a significant source of sea salt aerosol (SSA) (Yang et al., 2008). In this study, using snow salinity data and blowing […]
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Demographic histories and genetic diversity across pinnipeds are shaped by human exploitation, ecology and life-history
Read more of: Demographic histories and genetic diversity across pinnipeds are shaped by human exploitation, ecology and life-historyA central paradigm in conservation biology is that population bottlenecks reduce genetic diversity and population viability. In an era of biodiversity loss and climate change, understanding the determinants and consequences […]
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Variability in basal melting beneath Pine Island Ice Shelf on weekly to monthly timescales
Read more of: Variability in basal melting beneath Pine Island Ice Shelf on weekly to monthly timescalesOcean‐driven basal melting of Amundsen Sea ice shelves has triggered acceleration, thinning, and grounding line retreat on many West Antarctic outlet glaciers. Here we present the first year‐long (2014) record […]
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Characterization of a novel N-acylhomoserine lactonase, AidP, from Antarctic Planococcus sp.
Read more of: Characterization of a novel N-acylhomoserine lactonase, AidP, from Antarctic Planococcus sp.N-acylhomoserine lactones (AHLs) are well-studied signalling molecules produced by some Gram-negative Proteobacteria for bacterial cell-to-cell communication or quorum sensing. We have previously demonstrated the degradation of AHLs by an Antarctic […]
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Geochronology of the Lake Region of south-central Chile (39°–42°S): Preliminary results
Read more of: Geochronology of the Lake Region of south-central Chile (39°–42°S): Preliminary resultsCarboniferous, igneous, and metamorphic rocks, followed by Jurassic, Cretaceous, and particularly extensive Miocene granitoid plutons, crop out in the Andes of the Lake Region, as determined by new K-Ar and […]
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Sulphuric acid at grain boundaries in Antarctic ice
Read more of: Sulphuric acid at grain boundaries in Antarctic iceIt has been suggested1,2 that acids in the cold polar ice sheets may exist as aqueous mixtures at grain boundaries. This assumption can correctly predict the d.c. conductivity of polar […]