Environmental Processes, Biodiversity and Changes in Admiralty Bay, King George Island, Antarctica

Campos, Lúcia S.; Barboza, Carlos A.M.; Bassoi, Manuela; Bernardes, Marcelo; Bromberg, Sandra; Corbisier, Thaís Navajas; Fontes, Roberto Fioravanti Carelli; Gheller, Paula Foltran; Hajdu, Eduardo; Kawall, Helena G.; Lange, Priscila Kienteca; Lanna, André Monnerat; Lavrado, Helena Passeri; Monteiro, Gabriel C. S.; Montone, Rosalinda Carmela; Morales, Tatiana; Moura, Rafael Bendayan de; Nakayama, Cristina Rossi; Oackes, Thayane; Paranhos, Rodolfo; Passos, Flávio Dias; Petti, Mônica Angélica Varella; Pellizari, Vivian Helena; Rezende, Carlos Eduardo de; Rodrigues, M.C. Martins; Rosa, Luiz Henrique; Secchi, Eduardo R.; Tenenbaum, Denise Rivera; Yoneshigue‐Valentin, Yocie

doi:10.1007/978-3-642-27349-0_8

Cited by 10 publications

(23 citation statements)

References 68 publications

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“…For example, information on the 39 isopod species recorded in the Arthur Harbour is not accompanied by data on their abundance, except for a brief statement that the abundances were low (Richardson and Hedgpeth 1977). The much lower abundance and diversity of the isopod fauna in the Ezcurra Inlet, compared to the central basin of the Admiralty Bay, can be quite easily explained by the differences in the hydrological and sedimentary regimes (Pecherzewski 1980;Szafranski and Lipski 1982;Rudowski and Marsz 1996;Siciński 2004;Campos et al 2013). Glacial fjord fauna is generally impoverished in terms of biodiversity and abundance on account of various types of disturbance, such as increased mineral sedimentation and silting of bottom deposits (Włodarska-Kowalczuk and Pearson 2004;Siciński et al 2011;Kędra et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…A submerged sill (about 100 m high) separates the outer part of the inlet from its middle and inner parts (Marsz 1983). The outermost part of the Ezcurra Inlet features strong currents and exchanges water with the central basin, while the rest of the fjord is characterized by a weak circulation and a lower influence of water from the central basin (Campos et al 2013). Areas in the vicinity of glaciers show changes in salinity and temperature (Szafranski and Lipski 1982).…”

Section: Study Areamentioning

confidence: 99%

“…The areas of the fjord located farther away from glaciers are characterized by sandy clay silt. The amount of skeletal fractions increases along the Inlet's axis too (Rudowski and Marsz 1996;Siciński 2004;Campos et al 2013). At the same time, the proportion of sand is higher in the central basin, particularly in the shallower sublittoral (Siciński 2004;Siciński et al 2011).…”

Section: Study Areamentioning

confidence: 99%

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Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

et al. 2017

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Isopods belong to the most speciose groups of the Antarctic benthic fauna, although the knowledge on their diversity and small-scale distribution patterns is still limited. Here we analyze the diversity of the isopod fauna in the Admiralty Bay, a glacial fjord on the King George Island. The basin is located in the region of the Antarctic Peninsula, the fastest warming area of the Southern Ocean. The study provides important baseline data for future research, particularly with respect to temporal fluctuations in benthic fauna, associated with global changes observed in that part of the world. Forty species of isopods representing 19 families were recorded on the soft bottom of the Admiralty Bay. The analyses were based on 99 quantitative samples collected, within the 20-502-m depth range, with a 0.1 m 2 van Veen grab. The materials for the analyses were obtained in the austral summer seasons of 1984/1985 and 1985/1986. The data revealed a high number of isopod species occurring at a low abundance, the mean abundance amounting to 4.8 ± 8.6 ind./0.1 m 2 . Most of the species occurred at low abundances, 25% of the species being represented by singletons. Caecognathia polaris, the most abundant species, showed the mean abundance of merely 1.2 ± 4.2 ind./0.1 m 2 . Species richness, diversity and abundance of the isopod fauna were much higher in the central basin of the Admiralty Bay than in the Ezcurra Inlet, an area affected by a strong disturbance of glacial origin.

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Section: Discussionmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

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Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

et al. 2017

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“…Large part of the Admiralty Bay coastline is covered with glaciers and icefalls (Braun and Grossmann 2002). The bay is strongly affected by various glacial processes (Pęcherzewski 1980;Lipski 1987;Campos 2013). Admiralty Bay is influenced by Bellingshausen Sea and Weddell Sea waters (Tokarczyk 1987).…”

Section: Methodsmentioning

confidence: 99%

“…Bottom deposits are poorly sorted. The sediments can be described as sand (in the shallow sublittoral zone) and mud (silty clay sand and sandy clay silt) in deeper parts of the bay (Siciński 2004;Campos 2013). The phytal zone covers about 30% of the Admiralty Bay bottom (Zieliński 1990).…”

Section: Methodsmentioning

confidence: 99%

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

Zemko¹,

Siciński²,

Pabis³

et al. 2017

Polish Polar Research

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Admiralty 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).

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Anthropogenic Impacts on Sub-Antarctic and Antarctic Islands and the Adjacent Marine Environments

et al. 2012

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Environmental Processes, Biodiversity and Changes in Admiralty Bay, King George Island, Antarctica

Cited by 10 publications

References 68 publications

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

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

Anthropogenic Impacts on Sub-Antarctic and Antarctic Islands and the Adjacent Marine Environments

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