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  • 1
    Electronic Resource
    Electronic Resource
    Trematomus scotti in Beaver Lake: the first record of a fish from a non-marine Antarctic habitat (2005)
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    Journal of fish biology 66 (2005), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The first record of a fish from a non-marine Antarctic habitat is reported. A specimen of Trematomus scotti(Boulenger) was captured from the brackish water zone of epishelf Beaver Lake (70°7′ S; 68°14′ E).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0022-1112.2005.00697.x
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  • 2
    Electronic Resource
    Electronic Resource
    Overwintering populations of Mesodinium rubrum (Ciliophora: Haptorida) in lakes of the Vestfold Hills, East Antarctica (1997)
    Springer
    Polar biology 17 (1997), S. 175-179 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The autotrophic ciliate Mesodinium rubrum Lohmann was observed during winter and spring in saline lakes ranging in salinity from 2 to 78‰ in the Vestfold Hills, Antarctica. The ciliate remained active during winter, and contained chlorophyll even though the level of light available for photosynthesis was minimal. No evidence of encystment as a means of survival during winter was observed. A seasonal study in one of the lakes, Ace Lake, revealed that M. rubrum was present throughout the year at abundances ranging from 1×104 to 3.5×105 cells l-1. During the winter period, when little light penetrated the lake’s ice cover, cells were most common immediately under the ice at 2 m, where cell numbers were typically 8×104 cells l-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050119
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  • 3
    Electronic Resource
    Electronic Resource
    Dimethylsulfide and the algaPhaeocystis pouchetii in antarctic coastal waters (1990)
    Springer
    Marine biology 104 (1990), S. 339-346 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The concentrations of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) were measured in water collected from the Southern Ocean 10 km offshore from Davis Station, Antarctica, during the period May 1987 to January 1988, inclusive. During winter and spring, when the sea-ice was up to 1.9 m thick, DMS, DMSP and DMSO concentrations were low (0.2 to 1.5 nM), as were phytoplankton numbers. The maximum concentration of the sulfur compounds generally occurred in the top 10 m of the water column. DMS levels rose dramatically from early December onwards, reaching a peak of 290 nM at a depth of 15 m in January. This concentration is higher than reported elsewhere in the ocean. These high concentrations occurred at the same time as a bloom of the algaPhaeocystis pouchetii. A significant correlation occurred between DMS concentration and cell numbers of the alga. The ratio of DMS concentration to the number of cells of the alga was considerably higher than reported for blooms of this species elsewhere in the ocean. Up to 10% of the total global flux of DMS to the atmosphere may emanate from antarctic seas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313276
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  • 4
    Electronic Resource
    Electronic Resource
    Grazing of phytoplankton by copepods in eastern Antarctic coastal waters (1997)
    Springer
    Marine biology 128 (1997), S. 39-48 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chlorophyll a, primary productivity and grazing by copepods on phytoplankton were measured in the upper water column during the summer of 1994/1995 at a coastal site near Davis Station, East Antarctica. Chlorophyll a was at a maximum in mid-December, then dropped markedly as the coastal fast ice melted and broke‐out. Phytoplankton biomass increased again from mid‐ to late‐February. Copepods accounted for at least 65% of zooplankton biomass in the water column before sea ice break‐out, whereas larval polychaetes and ctenophores dominated after ice break‐out. Oncaeacurvata was the numerically dominant species throughout the study. The highest grazing rate (8.7 mg C␣m−3␣d−1) was recorded on 21 December when O.␣curvata accounted for 64% of the total. Grazing had decreased markedly by 28 December (0.9 mg C m−3 d−1); again O. curvata accounted for over 50% of the total ingested. Copepod grazing increased after ice break-out until the last experiment on 20 February (⋍5 mg C␣m−3␣d−1). The main species responsible for grazing during this period were O. curvata, Oithonasimilis, Calanoidesacutus and unidentified copepod nauplii. It was estimated that copepods removed between 1 and 5% of primary productivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050066
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  • 5
    Electronic Resource
    Electronic Resource
    Early nanotubes? (1992)
    [s.l.] : Nature Publishing Group
    Nature 359 (1992), S. 369-369 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Nature has recently published several reports of the synthesis and structure of carbon 'nanotubes'1"4. The authors of these reports seem to consider the study of this form of carbon - a development since the discovery of Buckminsterfullerene3. But there was a report in Nature as long ago as ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/359369c0
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  • 6
    Electronic Resource
    Electronic Resource
    Ice Shelf Microbial Ecosystems in the High Arctic and Implications for Life on Snowball Earth (2000)
    Springer
    Naturwissenschaften 87 (2000), S. 137-141 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract  The Ward Hunt Ice Shelf (83°N, 74°W) is the largest remaining section of thick (〉10 m) landfast sea ice along the northern coastline of Ellesmere Island, Canada. Extensive meltwater lakes and streams occur on the surface of the ice and are colonized by photosynthetic microbial mat communities. This High Arctic cryo-ecosystem is similar in several of its physical, biological and geochemical features to the McMurdo Ice Shelf in Antarctica. The ice-mats in both polar regions are dominated by filamentous cyanobacteria but also contain diatoms, chlorophytes, flagellates, ciliates, nematodes, tardigrades and rotifers. The luxuriant Ward Hunt consortia also contain high concentrations (107–108 cm–2) of viruses and heterotrophic bacteria. During periods of extensive ice cover, such as glaciations during the Proterozoic, cryotolerant mats of the type now found in these polar ice shelf ecosystems would have provided refugia for the survival, growth and evolution of a variety of organisms, including multicellular eukaryotes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001140050692
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