scholarly journals Colonization by mites of glacier-free areas in King George Island, Antarctica

2009 ◽  
Vol 44 (8) ◽  
pp. 891-895 ◽  
Author(s):  
Grzegorz Gryziak
Keyword(s):  
West Coast ◽  
Protected Area ◽  
Soil Samples ◽  
Oribatid Mites ◽  
King George Island ◽  
Admiralty Bay ◽  
Near Shore ◽  
South Shetlands ◽  
Mite Communities ◽  
The Antarctic

This work aimed to investigate the ratio of colonization by terrestrial mites on ice-free areas created by the ongoing climate-induced melting of Antarctic glaciers. Glacier retreat opens new ice-free areas for the colonization by vegetation and animals. The study was undertaken on the Antarctic Specially Protected Area no. 128 (West Coast of the Admiralty Bay, King George Island, South Shetlands Islands). Transects marked between the Ecology, Baranowski and Windy Glaciers, and a sea shore were used to collect soil samples. Oribatid mites were found only on near-shore areas, on patches of vegetation of more than 30 years of age. The colonization by mite communities is strongly determined by the presence of plants.

scholarly journals Temporal Distribution of Arsenic and Metals in Soil From King George Island, Antarctica

2022 ◽  
Vol 8 ◽  
Author(s):  
Tailisi H. Trevizani ◽  
Rosalinda C. Montone ◽  
Rubens C. L. Figueira
Keyword(s):  
Human Activities ◽  
Temporal Distribution ◽  
Polar Regions ◽  
Control Points ◽  
King George Island ◽  
Admiralty Bay ◽  
Direct Exposure ◽  
Antarctic Continent ◽  
The Antarctic ◽  
Continue Monitoring

The polar regions are vulnerable to impacts caused by local and global pollution. The Antarctic continent has been considered an environment that has remained little affected by human activities. Direct exposure to contaminants may occur in areas continuously occupied by research stations for several decades. Admiralty Bay on the southeast coast of King George Island, has potential for being affected by human activities due research stations operating in the area, including the Brazilian Commandant Ferraz Antarctic Station (CFAS). The levels of metals and arsenic were determined in soils collected near CFAS (points 5, 6, 7, and 9), Base G and at two points distant from the CFAS: Refuge II and Hennequin. Samples were collected after the fire in CFAS occurred in February 2012, up to December 2018 to assess the environmental impacts in the area. Al and As were related with Base G. Refuge II and Hennequin can be considered as control points for this region. As a consequence of the accident, the increased levels for Cd, Cu, Pb, and Zn, especially at point 9 (inside the CFAS) and in the soil surrounding the CFAS in 2013. The results from 2016 to 2018 demonstrated a reduction in levels of all studied metals near CFAS, which may be related to the leaching of metals into Admiralty Bay; it is thus, being important the continue monitoring soil, sediments, and Antarctic biota.

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 Diaspores of the Introduced Species Poa annua L. in Soil Samples from King George Island (South Shetlands, Antarctica)

2013 ◽  
Vol 45 (3) ◽  
pp. 415-419 ◽  
Author(s):  
Maciej Wódkiewicz ◽  
Halina Galera ◽  
Katarzyna J. Chwedorzewska ◽  
Irena Giełwanowska ◽  
Maria Olech
Keyword(s):  
Introduced Species ◽  
Soil Samples ◽  
Poa Annua ◽  
King George Island ◽  
South Shetlands

Bathymetric distribution of the meiofaunal polychaetes in the nearshore zone of Martel Inlet, King George Island, Antarctica

2006 ◽  
Vol 18 (2) ◽  
pp. 163-170 ◽  
Author(s):  
Mônica A. Varella Petti ◽  
Edmundo Ferraz Nonato ◽  
Rodrigo S.P. Skowronski ◽  
Thaïs Navajas Corbisier
Keyword(s):  
Sediment Cores ◽  
King George Island ◽  
Nearshore Zone ◽  
Bathymetric Distribution ◽  
Polychaete Species ◽  
Admiralty Bay ◽  
Soft Sediments ◽  
Distributional Patterns ◽  
The Antarctic

Polychaetes, the dominant macrofaunal taxa of the Antarctic soft sediments, provided more than 40% of the animals found in Martel Inlet. However, little information is available on the composition of meiofaunal communities in polar areas. This study identified the meiofaunal polychaete species and described their bathymetric distribution in the nearshore zone. Sediment cores were taken by divers from 6–25 m depth in the summer of 1991 and 1994 in front of the Brazilian Antarctic Station (Martel Inlet, Admiralty Bay). Additional sampling was done at the 18 m depth in 1994 in order to study the influence of ice scouring. A total of 1895 specimens in 17 families were found. Three species (Apistobranchus glacierae, Leitoscoloplos kerguelensis and Ophryotrocha notialis), all of them belonging to the temporary meiofauna, provided more than 70% of the total polychaete fraction. This meiofaunal component showed similar distributional patterns to those of the macrofaunal polychaetes in this area.

scholarly journals The occurrence and development of peat mounds on King George Island (Maritime Antarctic)

2014 ◽  
Vol 66 (2) ◽  
pp. 223-229 ◽  
Author(s):  
Jerzy Fabiszewski ◽  
Bronisław Wojtuń
Keyword(s):  
Initial Phase ◽  
Radiocarbon Dating ◽  
Floristic Composition ◽  
Deschampsia Antarctica ◽  
King George Island ◽  
Maritime Antarctic ◽  
South Shetlands ◽  
Peat Formation ◽  
The Antarctic ◽  
Further Development

On King George Island, South Shetlands Islands, a type of peat formation has been discovered which has not previously been reported from the Antarctic. These formations are in shape of mounds up to 7x 15 m in area, with a peat layer of about I m thick. About twenty five cm below the surface there is a layer of permanently frozen peat. The mounds are covered by living mosses (<em>Polytrichum alpinum</em> and <em>Drepanocladus uncinatus</em>), Antarctic hair grass (<em>Deschampsia antarctica</em>) and lichens. Erosion fissures occurring on the surface are evidence of contemporary drying and cessation of the mound's growth. The initial phase of the development of the mounds began with a community dominated by <em>Calliergidium austro-stramineum</em> and <em>Deschampsia antarctica</em>, and their further development has been due to peat accumulation formed almost entirely by <em>Calliergidium</em>. The location of the mounds is near a penguin rookery, which clearly conditioned the minerotrophic character of these formations, as compared with the "moss peat banks" formed by <em>Chorisodontium aciphyllum</em> and <em>Polytrichum al-pestre</em>. Moreover, the peat mounds differ from the latter in several ways, e.g. rate of growth and floristic composition. Radiocarbon dating of peat from the base of one mound gave an age of 4090±60 years B.P. This suggests that the age of the tundra on King George Island is about 5000-4000 years.

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.

First Italian Expedition to Antarctica, 1975–76

Polar Record ◽  
1977 ◽  
Vol 18 (115) ◽  
pp. 379-379
Keyword(s):  
King George Island ◽  
Admiralty Bay ◽  
Original Intention ◽  
Set Up ◽  
The Antarctic

The 15-man expedition did not get off to a good start. The ship originally chartered for the Antarctic voyage, the Repunte, was impounded in a Uruguayan shipyard and vital supplies were sequestered by the Uruguayan customs authorities. It was in a Norwegian vessel, the Rig Mate, that the party eventually landed at Admiralty Bay, on King George Island. The original intention had been to set up a permanent base on Ross Island, but the delay in Montevideo called for a change of plan. So the first Italian base in the Antarctic was established at Admiralty Bay, at a spot named ‘Conca Italia’ by the expedition. The base is well suited for eight people, with an area of 80 m2 instead of the planned 130 m2.

Pygoscelis penguin diets on King George Island, South Shetland Islands, with a special focus on the krill Euphausia superba

2020 ◽  
Vol 32 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Anna Panasiuk ◽  
Justyna Wawrzynek-Borejko ◽  
Aleksandra Musiał ◽  
Małgorzata Korczak-Abshire
Keyword(s):  
Euphausia Superba ◽  
South Shetland Islands ◽  
Special Focus ◽  
King George Island ◽  
Pygoscelis Adeliae ◽  
Human Pressure ◽  
Shetland Islands ◽  
Pygoscelis Antarcticus ◽  
South Shetlands ◽  
The Antarctic

AbstractIn the krill-based ecosystem of the Antarctic, fluctuations in the distribution and abundance of Euphausia superba may have strong impacts on predator populations; thus, it is crucial to observe the feeding ecology of Antarctic predators, especially in the light of climate change and increasing human pressure. We determined the composition of euphausiid species in diet samples collected from Adélie (Pygoscelis adeliae), chinstrap (Pygoscelis antarcticus) and gentoo (Pygoscelis papua) penguins on King George Island (South Shetlands Islands) during a breeding season. For all three penguin species, euphausiids (mainly E. superba) represented almost the entirety of researched stomach samples (i.e. 99.9% in the case of Adélie and chinstrap penguins), while gentoo penguins also proved to feed on fish (99.4% krill; 0.5% fish). Analysed material differed in the size of eaten E. superba specimens, with the smallest crustaceans consumed by Adélie penguins. Furthermore, we found differences in the ratio of consumed krill and krill size. Such disparities may be a result of sex-based differences and slight differences in feeding areas between the birds. Additionally, we noted some fragments of plastic debris in the investigated penguin diet samples.

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