Phytoplankton blooms under dim and cold conditions in freshwater lakes of East Antarctica

Polar Biology ◽  
2007 ◽  
Vol 31 (2) ◽  
pp. 199-208 ◽  
Author(s):  
Yukiko Tanabe ◽  
Sakae Kudoh ◽  
Satoshi Imura ◽  
Mitsuo Fukuchi
Keyword(s):  
East Antarctica ◽  
Freshwater Lakes ◽  
Phytoplankton Blooms

An analysis of the limnology and sedimentary diatom flora of fourteen lakes and ponds from the Windmill Islands, East Antarctica

2001 ◽  
Vol 13 (4) ◽  
pp. 410-419 ◽  
Author(s):  
D. Roberts ◽  
A. McMinn ◽  
N. Johnston ◽  
D.B. Gore ◽  
M. Melles ◽  
...  
Keyword(s):  
Water Chemistry ◽  
Saline Lakes ◽  
East Antarctica ◽  
Freshwater Lakes ◽  
Diatom Flora ◽  
Larsemann Hills ◽  
Freshwater Ponds ◽  
Windmill Islands ◽  
Vestfold Hills ◽  
Floral Assemblage

The limnology and sedimentary diatom flora of fourteen lakes and ponds from the Windmill Islands, East Antarctica, is presented. Saline lakes, saline ponds and freshwater ponds are represented in this dataset. The Windmill Island lake diatom flora represents an intermediate floral assemblage between that of the freshwater lakes of the Larsemann Hills and the saline lakes of Vestfold Hills, East Antarctica. Variations within this assemblage are related to water chemistry variables in the Windmill Island lakes. In particular, a lakewater salinity/phosphate gradient can explain the variation observed in the sedimentary diatom flora of the lakes and ponds included in this study.

Freshwater diatoms from Pleistocene-Holocene sediments in Bunger Oasis (East Antarctica)

2019 ◽  
pp. 233-2363
Author(s):  
Mark A. Mustafin ◽  
Zinaida V. Pushina ◽  
Andrey S. Biryukov
Keyword(s):  
Shallow Lake ◽  
High Salinity ◽  
East Antarctica ◽  
Diatom Assemblage ◽  
Freshwater Lakes ◽  
Quaternary Sediments ◽  
Holocene Sediments ◽  
Freshwater Diatoms ◽  
Western Shore ◽  
Freshwater Diatom

The monodominant freshwater diatom assemblage was in first established in Quaternary sediments at an altitude of 24 m in the outcrop on the western shore of the Rybiy Khvost Bay in the Bunger Oasis (East Antarctica). The diatom assemblage is dominated by the benthic Navicula shackletoni, characteristic of hypersaline lakes.The diatom assemblage reflects the conditions for the formation of deposits in a shallow lake with high salinity. This diatom assemblage differs from the previously established diatom associations in the Holocene sediments of the freshwater lakes of the Bunger Oasis.

scholarly journals Taxonomy, ecology and zoogeography of two East Antarctic freshwater calanoid copepod species: Boeckella poppei and Gladioferens antarcticus

2003 ◽  
Vol 15 (4) ◽  
pp. 439-448 ◽  
Author(s):  
I.A.E. BAYLY ◽  
J.A.E. GIBSON ◽  
B. WAGNER ◽  
K.M. SWADLING
Keyword(s):  
South America ◽  
Antarctic Peninsula ◽  
Endemic Species ◽  
Calanoid Copepod ◽  
East Antarctica ◽  
Copepod Species ◽  
Calanoid Copepods ◽  
Freshwater Lakes ◽  
Isolated Populations ◽  
The Antarctic

New populations of the two species of calanoid copepods known to inhabit freshwater lakes in East Antarctica, Boeckella poppei (Mrázek, 1901) and Gladioferens antarcticus Bayly, 1994, have recently been discovered. The morphology of the populations of B. poppei showed significant differences, notably a reduction in the armature of the male fifth leg, when compared with typical specimens from the Antarctic Peninsula and South America. Gladioferens antarcticus had previously been recorded from a single lake in the Bunger Hills, but has now been recorded from three further lakes in this region. A recent review of Antarctic terrestrial and limnetic zooplankton suggested that neither of these species can be considered an East Antarctic endemic, with B. poppei being listed as a recent anthropogenic introduction and G. antarcticus a ‘marine interloper’. We conclude differently: B. poppei has been present in isolated populations in East Antarctica for significant lengths of time, possibly predating the current interglacial, while G. antarcticus is a true Antarctic endemic species whose ancestors have been present in the region since before Australia separated from Antarctica.

Some centric diatoms (Bacillariophyta) from Neogene deposits of the Fisher Massif (Prince Charles Mountains, East Antarctica)

2011 ◽  
Vol 45 ◽  
pp. 32-49
Author(s):  
R. M. Gogorev ◽  
Z. V. Pushina
Keyword(s):  
Marine Sediments ◽  
East Antarctica ◽  
Benthic Diatoms ◽  
Detailed Data ◽  
Planktonic Algae ◽  
Centric Diatoms ◽  
Planktonic Diatom ◽  
Oceanic Species ◽  
Diatom Complexes

The richest diatom complexes have revealed due to the study of glacial-marine sediments sampled in the Fisher Massif (Prince Charles Mountains, East Antarctica) during 52nd and 53rd Russian Antarctic Expeditions (Polar Marine Geol. Survey Expedition) in 2006/07 and 2007/08. Three diatom complexes are distinguished according to different palaeoecological conditions: the planktonic one is located in the basis of the outcrop, while mixed planktonic-benthic and benthic ones being located above. The planktonic diatom complexes are dominated by two oceanic species Actinocyclus ingens (up to 8%) and Denticulopsis simonseni (up to 80%). There are 15 planktonic algae, e. g. Eucampia аntarctica, Fragilariopsis spp., Rhizosolenia spp., Rouxia antarctica, Podosira antarctica sp. nov., Stellarima microtrias; and also unknown and non-described benthic diatoms Achnanthes sp., Cocconeis spp., Rhabdonema (s. l.) spp. and Synedra (s. l.) spp. Detailed data on morphology and taxonomy of 10 centric diatoms are presented, including 3 newly described species.

The geochemical characteristics of the Jurassic plume magmatism within Ahlmannryggen massif (Queen Maud Land, East Antarctica)

2019 ◽  
Vol 486 (1) ◽  
pp. 98-102
Author(s):  
N. M. Sushchevskaya ◽  
B. V. Belyatsky ◽  
G. L. Leitchenkov ◽  
V. G. Batanova ◽  
A. V. Sobolev
Keyword(s):  
Mantle Peridotite ◽  
Oceanic Lithosphere ◽  
East Antarctica ◽  
Geochemical Characteristics ◽  
Mantle Melting ◽  
Plume Magmatism

Mesozoic dikes associated with the Karoo plume were studied within the East Antarctica where at Queen Maud Land on the Almannryggen massif high-Ti magnesian Fe-basalts were found. It is assumed that such basalts originate by means of the pyroxenite-containing mantle melting. The isotopic characteristics of the studied dolerites reflect the composition of the pyroxenite source - the ancient oceanic lithosphere (ЕМI), submerged at the mantle depths of 150-170 km in the paleosubduction zone of the Gondwanian continent and transformed 180 m.y. ago into the pyroxenite melt when interacting with the plume mantle peridotite.

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