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Ornithogenic soil is derived from the deposition of the fecal matter of various species of birds and is a major source of nutrient input in the Antarctic marine ecosystem. A significant proportion of microbiota of ornithogenic soil collected from an Adelie penguin colony in eastern Antarctica…
16S rDNA clone library analysis was used to identify bacterial biodiversity in a variety of sea-ice microbial communities (SIMCO). DNA was extracted from seven Antarctic sea-ice samples and … one Arctic sea-ice sample and 16S rDNA PCR-amplified using universal and Archaea-specific primers.
The ice-free habitats of continental Antarctica are among the most geographically isolated on Earth. Colonization of Antarctica requires the immigration of dissemules from distant biotic sites across large distances of snow or open ocean.
The Antarctic continent covers an area of nearly 14 million square kilometres, representing one-sixteenth of the Earths land surface. Ninety-eight percent of this area is covered by ice. The remaining 2% comprises widely scattered patches of rock and mineral terrain surrounded by snowfields…
Stereo recordings of harp seal (Pagophilus groenlandicus) and Weddell seal (Leptonychotes weddellii) underwater vocalizations were made near breeding groups using separations between two hydrophones of 159-339 m. Within a large herd, harp seal call numbers varied slightly between channels.