Peculiarities of the geographical and vertical distribution of marine isopods and the problem of deep-sea fauna origin

Kussakin, O. G.

doi:10.1007/bf00394108

Cited by 98 publications

(49 citation statements)

References 14 publications

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“…Kussakin 1967;Kussakin 1973;Brandt 1990Brandt , 1992De Broyer et al 2011;Kaiser 2014), although ecological studies have been scarce, most concerning only the shallowest soft-bottom areas (e.g. Lowry 1975;Richardson and Hedgpeth 1977;Siciński et al 2012;Bick and Arlt 2013).…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…Various studies (e.g. Kussakin 1973;Hessler et al 1979;Schultz 1979) were not based on the criteria of Hennig's theory of phylogenetic systematics (Hennig 1950), and most recent morphological works were focused on single selected families or genera (genus Ilyarachna (Munnopsidae) : Hessler & Thistle 1975; genus Eurycope (Munnopsidae): Wilson 1982;Munnopsidae: Wilson 1989; Acanthaspidiidae, the munnopsid genera Storthyngura, Acanthocope and Microprotus: Brandt 1991b). Only one work ( Wägele 1989) analysed the phylogenetic relationship of all deep-sea taxa of the Asellota, but this study was not able to resolve the details of their phylogeny caused by the high variability of most morphological characters.…”

Section: Introductionmentioning

confidence: 99%

Multiple origins of deep-sea Asellota (Crustacea: Isopoda) from shallow waters revealed by molecular data

et al. 2008

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The Asellota are a highly variable group of Isopoda with many species in freshwater and marine shallowwater environments. However, in the deep sea, they show their most impressive radiation with a broad range of astonishing morphological adaptations and bizarre body forms. Nevertheless, the evolution and phylogeny of the deep-sea Asellota are poorly known because of difficulties in scoring morphological characters. In this study, the molecular phylogeny of the Asellota is evaluated for 15 marine shallowwater species and 101 deep-sea species, using complete 18S and partial 28S rDNA gene sequences. Our molecular data support the monophyly of most deep-sea families and give evidence for a multiple colonization of the deep sea by at least four major lineages of asellote isopods. According to our molecular data, one of these lineages indicates an impressive radiation in the deep sea. Furthermore, the present study rejects the monophyly of the family Janiridae, a group of plesiomorphic shallow-water Asellota, and several shallow-water and deep-sea genera (Acanthaspidia, Ianthopsis, Haploniscus, Echinozone, Eurycope, Munnopsurus and Syneurycope).

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“…Regarding the possible origin of Antarctic Isopoda, Sieg (1988) cited Kussakin (1973) and Menzies et al (1973), both of whom favoured the hypothesis that the Antarctic taxa are the ancestors of the modern deep-sea species. In contrast, Hessler and Thistle (1975), Hessler and Wilson (1983), and Hessler et al (1979) all assumed that the Antarctic Isopoda were derived from primitive deep-sea species.…”

Section: Isopodamentioning

confidence: 99%

On the origin and evolution of Antarctic Peracarida (Crustacea, Malacostraca)

Brandt¹

1999

Sci. Mar.

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Peculiarities of the geographical and vertical distribution of marine isopods and the problem of deep-sea fauna origin

Cited by 98 publications

References 14 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

Multiple origins of deep-sea Asellota (Crustacea: Isopoda) from shallow waters revealed by molecular data

On the origin and evolution of Antarctic Peracarida (Crustacea, Malacostraca)

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