scholarly journals Species Composition and Spatial Distribution of Echinoderms in the Shallow Coast of Admiralty Bay, King George Island, Antarctica

2013 ◽  
pp. 160-169
Author(s):  
Andre Monnerat Lanna ◽  
Carlos Alberto de Moura Barboza ◽  
Rafael Bendayan de Moura ◽  
Helena Passeri Lavrado ◽  
Adriana Galindo Dalto ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Species Composition ◽  
King George Island ◽  
Admiralty Bay

Abundance and spatial distribution of sympatrically breeding Catharacta spp. (skuas) in Admiralty Bay, King George Island, Antarctica

Polar Biology ◽  
2009 ◽  
Vol 33 (5) ◽  
pp. 673-682 ◽  
Author(s):  
Ana Paula Bertoldi Carneiro ◽  
Michael J. Polito ◽  
Martin Sander ◽  
Wayne Z. Trivelpiece
Keyword(s):  
Spatial Distribution ◽  
King George Island ◽  
Admiralty Bay

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 A new mini box corer for sampling muddy bottoms in antarctic shallow waters

2009 ◽  
Vol 52 (3) ◽  
pp. 629-636 ◽  
Author(s):  
Carlos Alejandro Echeverría ◽  
Helena Passeri Lavrado ◽  
Lúcia Campos ◽  
Paulo Cesar de Paiva
Keyword(s):  
Stainless Steel ◽  
Shallow Waters ◽  
King George Island ◽  
Sampling Area ◽  
Sampling Device ◽  
Admiralty Bay ◽  
Direct Sampling ◽  
External Frame ◽  
Bottom Sampling ◽  
Box Corer

A new Mini Box Corer (MBC-GEAMB) was developed for bottom sampling in Antarctic shallow waters down to 100 m depth from a small vessel. It consists of a detachable stainless steel box with a total sampling area of 0.0625 m², and a closing arm with a detachable blade without an external frame. MBC allowed stratified bottom sampling and good quality samples comparable to those obtained through diving. A comparison between the MBC-GEAMB and a 0.056 m²van Veen grab (VV) was undertaken for the benthic macrofaunal composition in Admiralty Bay, King George Island (Antarctica). MBC and VV samples were taken from three depths (20, 30 and 60m) in two sites. Total densities sampled with the MBC were up to 10 times higher than those obtained with van Veen grab. VV samples might lead to faunistic abundance underestimation compared to the MBC samples. Besides, MBC showed a higher performance on discriminating different sites as regards total macrofaunal density. It is suggested that MBC could be employed as an efficient remote sampling device for shallow-waters where direct sampling by SCUBA was not advisable.

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 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 Spatial distribution and species composition of small pelagic fishes in the Gulf of California

2006 ◽  
Author(s):  
Edgar Lanz ◽  
Manuel O. Nevárez Martínez ◽  
Juana López Martínez ◽  
Juan A. Dworak
Keyword(s):  
Spatial Distribution ◽  
Species Composition ◽  
Gulf Of California ◽  
Pelagic Fishes

scholarly journals Arsenic, copper and zinc in marine sediments from the proximity of the brazilian­antarctic base, Admiralty Bay, King George Island, ­Antartica

2010 ◽  
pp. 137-140 ◽  
Author(s):  
Andreza Portella Ribeiro ◽  
Rubens César Lopes Figueira ◽  
César de Castro Martins ◽  
Charles Roberto de Almeida Silva ◽  
Elvis Joacir de França ◽  
...  
Keyword(s):  
Marine Sediments ◽  
King George Island ◽  
Admiralty Bay ◽  
Copper And Zinc ◽  
Arsenic Copper
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