scholarly journals Phytal Macrofauna Composition of the Himantothallus Grandifolius (Heterokonphyta, Desmarestiaceae) from Admiralty Bay (King George Island, South Shetland Islands, Antarctica)

2012 ◽  
pp. 153-157
Author(s):  
Tais Maria de Souza Campos ◽  
Ingrid Avila da Costa ◽  
Geyze Magalhães Faria ◽  
Yocie Yoneshigue-Valentin ◽  
Adriana Galindo Dalto
Keyword(s):  
South Shetland Islands ◽  
King George Island ◽  
Admiralty Bay ◽  
Shetland Islands

A new Antarctic foraminiferal species for detecting climate change in sub-Recent glacier-proximal sediments

2009 ◽  
Vol 21 (5) ◽  
pp. 439-448 ◽  
Author(s):  
Wojciech Majewski ◽  
Andrzej Tatur
Keyword(s):  
Climate Change ◽  
Climate Warming ◽  
The Arctic ◽  
South Shetland Islands ◽  
King George Island ◽  
Tidewater Glaciers ◽  
Admiralty Bay ◽  
Shetland Islands ◽  
Foraminiferal Species ◽  
Water Depths

AbstractCribroelphidium webbi sp. nov. is the only adequately described sub-Recent elphidiid foraminifer from Antarctica. In Admiralty Bay (King George Island, South Shetland Islands), it is found at several locations within inner fiord setting at water depths between 33 and 165 m, but most commonly shallower than 100 m. In outer basins this foraminifer is absent. In the cores analysed, C. webbi sp. nov. is present in well-constrained sub-Recent horizons that are clearly related to climate warming and deglaciation. These horizons represent a diachronous facies marker rather than a single stratigraphic layer. Cribroelphidium webbi sp. nov. shows clear association with retreating tidewater glaciers, therefore it is an important sensitive glacier-proximal indicator. It appears that it shares similar ecologic affinities with Cribroelphidium excavatum clavatum, which is widely distributed throughout the Arctic.

scholarly journals New records of isopod species of the Antarctic Specially Managed Area No. 1, Admiralty Bay, South Shetland Islands

2017 ◽  
Vol 38 (3) ◽  
pp. 409-419
Author(s):  
Karol Zemko ◽  
Krzysztof Pabis ◽  
Jacek Siciński ◽  
Magdalena Błażewicz
Keyword(s):  
Southern Ocean ◽  
New Records ◽  
South Shetland Islands ◽  
Small Scale ◽  
King George Island ◽  
Admiralty Bay ◽  
Shetland Islands ◽  
The Antarctic ◽  
First Time ◽  
Marine Basins

AbstractAdmiralty Bay (King George Island) is an Antarctic Specially Managed Area and one the most thoroughly studied small-scale marine basins in the Southern Ocean. Our study provides new data on the isopod fauna in this glacially affected fjord. Twelve species of isopods were recorded in this basin for the first time. Six of them were found for the first time in the region of the South Shetland Islands. The highest number of species new for Admiralty Bay were found in the families Munnopsidae (4 species) and Munnidae (3 species).

scholarly journals Geographical Research of the 30th Polish Antarctic Expedition at Arctowski Polish Station (King George Island, South Shetland Islands, Antarctica)

2008 ◽  
Vol 13 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Piotr Angiel
Keyword(s):  
Environmental Conditions ◽  
South Shetland Islands ◽  
King George Island ◽  
Aeolian Transport ◽  
Admiralty Bay ◽  
Shetland Islands ◽  
Geographical Research ◽  
Outwash Plain ◽  
Antarctic Expedition ◽  
Quartz Grains

Abstract This paper presents the scope of geographical research conducted at Arctowski Station during the 30th Polish Antarctic Expedition. The research included meteorological, climatological, geomorphological and glaciological issues. During the expedition, research was conducted on sandur sediments on the outwash plain of Sphinx Glacier, the size of the aeolian transport, intensity of periglacial phenomena, and the way in which environmental conditions are recorded on quartz grains collected on the Admiralty Bay beaches. Detailed measurements of the basic meteorological components were made, geomorphological maps of the outwash plains of Sphinx, Baranowski, and Windy Glaciers were also completed.

scholarly journals Detecção de Mudanças Ambientais na Antártica através de Dados de Sensoriamento Remoto e Mapas Históricos

2001 ◽  
Vol 28 (2) ◽  
pp. 337
Author(s):  
JORGE ARIGONY NETO ◽  
JEFERSON CARDIA SIMÕES ◽  
ULISSES FRANZ BREMER ◽  
FRANCISCO ELISEU AQUINO
Keyword(s):  
Ice Cover ◽  
South Shetland Islands ◽  
King George Island ◽  
Ice Shelves ◽  
Admiralty Bay ◽  
Shetland Islands ◽  
Climatic Variations ◽  
Glacier System ◽  
Ice Retreat ◽  
The Antarctic

Ice masses in the South Shetland Islands, Antarctica, are relatively thin and near or at the melting pressure point. They are, therefore, very sensitive to climatic variations. This work discusses glaciers retreat observed since 1950s in the Antarctic Specially Managed Area (ASMA) of Admiralty Bay in King George Island. From 1956 to 1979 this area lost 4.3 km2 (2%) of its ice cover. Further 4.9 km2 disappeared (10% of the original ice cover, i.e. in 1956). The ice retreat magnitude in this period cannot be attributed to in-built variations of the glacier system. Further, it is associated to similar glaciers retractions and ice shelves collapses in the northern most part of the Antarctic Peninsula. Probably this general ice retreat results from or is enhanced by the atmospheric warming recorded for the region since 1940s.

Abundance and biomass estimates of the benthic fauna in Admiralty Bay, King George Island, South Shetland Islands

Polar Biology ◽  
1986 ◽  
Vol 6 (1) ◽  
pp. 5-16 ◽  
Author(s):  
K. Jażdżeski ◽  
W. Jurasz ◽  
W. Kittel ◽  
E. Presler ◽  
P. Presler ◽  
...  
Keyword(s):  
Benthic Fauna ◽  
South Shetland Islands ◽  
King George Island ◽  
Admiralty Bay ◽  
Shetland Islands

Sterols and linear alkylbenzenes in marine sediments from Admiralty Bay, King George Island, South Shetland Islands

2002 ◽  
Vol 14 (3) ◽  
pp. 244-252 ◽  
Author(s):  
C.C. MARTINS ◽  
M.I. VENKATESAN ◽  
R.C. MONTONE
Keyword(s):  
Marine Mammals ◽  
Total Sterol ◽  
Maximum Level ◽  
South Shetland Islands ◽  
King George Island ◽  
Admiralty Bay ◽  
Shetland Islands ◽  
Sewage Outfall ◽  
Linear Alkylbenzenes ◽  
Major Sterol

Selected sterols (coprostanol, epicoprostanol, cholesterol, cholestanol), stanone (5ßcoprostanone) and linear alkylbenzenes (LABs) were measured in the surface sediments near Ferraz station sewage outfalls, in Admiralty Bay, King George Island, South Shetland Islands. during the summer of 1997/98 using GC-FID and GC-MS. Total sterol concentrations varied between 0.21 and 10.4 μg g−1 dry sediment. Cholesterol was the major sterol at all sites, except at the sewage outfall, where coprostanol predominated. The concentration of coprostanol varied between 0.03 and 6.14 μg g−1 dry sediment, but the majority of the samples contained levels below 0.13 μg g−1 dry sediment. The parameters coprostanol+epicoprostanol in total sterols, coprostanol/epicoprostanol ratio versus % of cholesterol in total sterols and versus 5ß-coprostanone concentration were used to identify the sewage impacted locations in the study area. Only sites extending to 50m from the sewage outfall exhibited a sterol signal indicating sewage input. Total LABs varied from <0.60 to 11.8 ng.g−1 dry sediment with the maximum level at the sewage outfall. Faeces from different species of seals all contained large amounts of cholesterol and some 5ßcoprostanone. Relatively low levels of coprostanol and high levels of cholesterol observed in distant sites could be attributed to natural sources such as marine mammals.

scholarly journals Morphologic and molecular diversity of the foraminiferal genus Globocassidulina in Admiralty Bay, King George Island

2010 ◽  
Vol 22 (3) ◽  
pp. 271-281 ◽  
Author(s):  
Wojciech Majewski ◽  
Jan Pawlowski
Keyword(s):  
Shallow Water ◽  
Water Depth ◽  
Molecular Diversity ◽  
Surface Sediments ◽  
South Shetland Islands ◽  
King George Island ◽  
Test Size ◽  
Admiralty Bay ◽  
Shetland Islands ◽  
Magellan Region

AbstractFour distinctive morphological types can be found among living Globocassidulina in surface sediments of Admiralty Bay (King George Island, South Shetland Islands). The molecular analysis of the SSU and ITS rDNA indicates that they are monospecific and belong to Globocassidulina biora, except for minute forms from deeper than 200 m water depth which probably represent G. subglobosa. The morphological types of G. biora that show doubled or branched apertures, varied test size and shape as well as colour of cytoplasm, represent populations at different stages of ontogenetic development. However, the variability among large G. biora from the same locations is difficult to comprehend. It seems probable that G. biora is the only recent, large, shallow water Globocassidulina represented throughout the Antarctica, while G. crassa is typical for the Magellan region.

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