Massive diatom bloom initiated by high winter sea ice in Admiralty Bay (King George Island, South Shetlands) in relation to nutrient concentrations in the water column during the 2009/2010 summer

2021 ◽  
pp. 103667
Author(s):  
Agnieszka Wasiłowska ◽  
Andrzej Tatur ◽  
Marek Rzepecki
Keyword(s):  
Sea Ice ◽  
Water Column ◽  
Nutrient Concentrations ◽  
Diatom Bloom ◽  
King George Island ◽  
Admiralty Bay ◽  
South Shetlands

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 New species of desmosomatid isopods from Admiralty Bay, King George Island

2011 ◽  
Vol 32 (4) ◽  
pp. 321-340 ◽  
Author(s):  
Karol Zemko ◽  
Saskia Brix
Keyword(s):  
New Species ◽  
Body Shape ◽  
Original Description ◽  
The Body ◽  
King George Island ◽  
Admiralty Bay ◽  
Two New Species ◽  
South Shetlands

New species of desmosomatid isopods from Admiralty Bay, King George IslandTwo new species of desmosomatid isopods,Eugerdella margaretaesp. n. andEugerdella celatasp. n. are described from Admiralty Bay, King George Island, South Shetlands. Information is added to the original description ofEugerdella falklandica(Nordenstam, 1933) based on re-examination of the holotype. Both new species are similar toE. falklandica, for example by the body shape, the shape of pleotelson and presence of rows of four horn-like spines on the head. They are distinguished fromE. falklandicaby the number of setae on pereopod articles.Eugerdella celatasp. n. is distinguished by the presence of ventral spines on pereonites 1-4.

scholarly journals Change in N and P Concentrations in Antarctic Streams as a Response to Change in Penguin Populations

2010 ◽  
Vol 17 (1) ◽  
pp. 67-80 ◽  
Author(s):  
Arkadiusz Nędzarek
Keyword(s):  
Organic Matter ◽  
Trophic Status ◽  
Ammonium Nitrogen ◽  
King George Island ◽  
Nitrogen And Phosphorus ◽  
Admiralty Bay ◽  
Ultimate Cause ◽  
South Shetlands ◽  
Reactive Phosphorus ◽  
Response To Change

ABSTRACTThis study presents changes in the concentrations of nitrogen and phosphorus in two streams in Western Antarctica (Admiralty Bay, King George Island, South Shetlands) that differ in trophic status. The results suggest a decline in concentrations of the determined forms of N and P between 2001 and 2005. The decrease ranged from 9.3% for reactive phosphorus to 73.2% for ammonium-nitrogen. Such inferred declines in N and P concentrations are considered to reflect reduced deposition on land of organic matter brought in from the seas by the penguins nesting in the area. The ultimate cause of this is in turn the steady decline in abundance that is being noted for these penguins.

scholarly journals Marine Macroalgal Diversity in Admiralty Bay, King George Island, South Shetlands Islands, Antarctica

2013 ◽  
pp. 140-148 ◽  
Author(s):  
Yocie Yoneshigue-Valentin ◽  
Ingrid Balesteros Silva ◽  
Mutue Toyota Fujii ◽  
Nair Sumie Yokoya ◽  
Diclá Pupo ◽  
...  
Keyword(s):  
King George Island ◽  
Admiralty Bay ◽  
South Shetlands

Wind field effect on hydrography and chlorophyll dynamics in the coastal pelagial of Admiralty Bay, King George Island, Antarctica

1994 ◽  
Vol 6 (4) ◽  
pp. 433-442 ◽  
Author(s):  
Frederico Pereira Brandini ◽  
Jaqueline Rebello
Keyword(s):  
Hydrological Regime ◽  
Late Summer ◽  
Euphotic Zone ◽  
Biomass Accumulation ◽  
Temporal Variations ◽  
South Shetland Islands ◽  
Benthic Diatoms ◽  
Nutrient Concentrations ◽  
King George Island ◽  
Admiralty Bay

The vertical distribution of physicochemical parameters and Chl a at a fixed station in Admiralty Bay (King George Island, South Shetland Islands) was recorded over 73 days during the summer of 1988/89. Temporal variations in Chl a and nutrient stocks in the euphotic zone were associated with changes in the wind/hydrological regime. Northerly winds of late December and early January moved the surface layers towards the outerbay, during which time the chlorophyll stocks remained low in the euphotic zone. Turbulence induced by southerly winds in the second half of January resuspended sediments and benthic diatoms in the shallow (0–20 m) inner inlets of the bay, increasing turbidity and nutrient concentrations at the surface. During the first half of February wind relaxation caused the mass sedimentation of previously resuspended benthic diatoms increasing chlorophyll and phaeopigments in the subsurface layers in deeper sections of the bay. Although turbulence limits phytoplankton biomass accumulation in open waters of the Antarctic, it may have a positive effect (increasing chlorophyll biomass of benthic origin) in coastal pelagic environments during late summer.

scholarly journals The sea-spiders (Arthropoda: Pycnogonida) of Admiralty Bay, King George Island

2011 ◽  
Vol 32 (1) ◽  
pp. 27-38 ◽  
Author(s):  
Roger Bamber
Keyword(s):  
Fine Sand ◽  
Wide Distribution ◽  
Research Station ◽  
King George Island ◽  
Scotia Sea ◽  
Admiralty Bay ◽  
Sea Spiders ◽  
Antarctic Waters ◽  
South Shetlands ◽  
Prevalent Species

The sea-spiders (Arthropoda: Pycnogonida) of Admiralty Bay, King George IslandBetween 1979 and 2007, various sampling projects from the PolishArctowskiResearch Station in Admiralty Bay, King George Island, Antarctica, collected a diverse assemblage of pycnogonids,inter alia. Examination of this material has revealed 24 species in 11 genera and six families: all of this material is described. Samples were from poorly-sorted fine-sand to coarse-silt substrata, at depths between 27 and 405 m. The diverse assemblage was of species consistent with the known pycnogonid fauna of these depths in the South Shetlands and the Palmer Archipelago region, and includes a number of species recorded for only the second time since the types. As typical for Antarctic waters, the predominant and most diverse genus wasNymphon(nine species); the prevalent species wasNymphon eltaninae, notNymphon australe: implications for the apparent wide-distribution of records of the latter species are discussed. These records increase the biogeographical range ofNymphon subtileandNymphon punctumfrom Subantarctic waters to the Scotia Sea.

scholarly journals Collembola (Arthropoda, Hexapoda) Associated to Terrestrial Green Algae from Ice-Free Areas in Admiralty Bay (King George Island, South Shetlands Islands, Antarctica)

2013 ◽  
pp. 94-97
Author(s):  
Maria Cleide de Mendonça ◽  
Gabriel Costa Queiroz ◽  
Eduardo Assis Abrantes ◽  
Adriana Galindo Dalto ◽  
Yocie Yoneshigue Valentin
Keyword(s):  
Green Algae ◽  
King George Island ◽  
Admiralty Bay ◽  
South Shetlands
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