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: Recent technological advances in the study and dating of both land and marine glacial geologic features combined with improvements in both glaciological and post-glacial isostatic rebound modelling have led to significant improvements in our knowledge and understanding of the Antarctic Ice Sheets…
We conducted a scanning electron microscopic survey of morphological variations in the … calcareous nanoplankton species Emiliania huxleyi in Southern Ocean surface water samples … collected along a transect from 43 to 64° S and 141 to 145° E during November 2001, October to … February 2002/2003…
In Polar Regions, sea ice has a marked influence on interactions between the coupled ocean-atmosphere system. The contribution of the sea ice zone to the global flux of dimethylsulphide (DMS), a trace sulphur gas implicated in climate change, has been of interest for over a decade.
The distribution of euphausiid larvae along the coast of Terre Ade´lie, Antarctica, was assessed using … oblique tows of a double-framed bongo net at 38 stations during summer 2004. Larvae of Euphausia … crystallorophias and Thysanoessa macrura were observed. For E. crystallorophias larvae…
Filter fractionated picophytoplankton from … Antarctic coastal waters (summer 2001) represented only … 7–33% of total phytoplankton, even though total stocks … were low (average Chl a = 0.32 g l¡1, range = 0.13– 1.03 g l¡1). Though all cells passed a 2 m Wlter…
In January 2004 the microplankton community … from the coastal waters of Terre Ade´lie and Georges V Land … (139!E–145!E) was studied. Results showed a diatomdominated … bloom with chlorophyll a levels averaging … 0.64 lg l-1 at 5 m depth (range 0.21–1.57 lg l-1).
[1] The flow of water beneath the Antarctic Ice Sheet has … recently been shown to involve drainage from and exchange … between subglacial lakes, with flow routing over distances … of >100km. As subglacial water is known to be important to … ice-sheet dynamics…
Many parasitic Apicomplexa, such as Plasmodium falciparum, contain an unpigmented chloroplast remnant termed the … apicoplast, which is a target for malaria treatment. However, no close relative of apicomplexans with a functional … photosynthetic plastid has yet been described.
Bacteria play a key role in the world’s oceans, supporting nutrient remineralisation and … mediating carbon transfer. Little is known about annual changes in bacterial concentration, production … and metabolism during the extreme seasonal changes in biological productivity in Antarctic … waters.
Despite being a major pathway for carbon flow in aquatic systems, little is known about … annual changes in microzooplankton grazing in Antarctic waters and its top-down control of phytoplankton.
We present colour-colour and colour-magnitude diagrams for RCW 57 (NGC … 3576) based on L-band data at 3.5 ìm taken with SPIREX (South Pole Infrared Explorer), and 2MASS JHKs data at 1.25-2.2 ìm. A total of 251 sources were detected.
1. Microbial plankton dynamics in an ultra-oligotrophic epishelf lake (Beaver Lake, Antarctica) were investigated over an austral summer (December 2002 to January 2003). The aim was to characterise carbon cycling in an environmentally extreme lake. 2.