First insights into the deep-sea tanaidacean fauna of the Ross Sea: species richness and composition across the shelf break, slope and abyss

Pabis, Krzysztof; Jóźwiak, Piotr; Lörz, Anne‐Nina; Schnabel, Kareen E.; Błażewicz, Magdalena

doi:10.1007/s00300-015-1706-z

Cited by 22 publications

(23 citation statements)

References 56 publications

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“…Brandt et al (2009) analysed the bathymetric depth ranges at polychaete family level within 100 m depth bins, showing that most families were spread over several thousand meters, although, species-level data may be more appropriate to assess depth zonation. Kaiser et al (2011) showed that many isopods in the Southern Ocean were restricted to slope depths with a possibility of the existence of a unique Southern Ocean slope fauna, Recently, tanaid data from the Ross Sea suggested the presence of a distinct slope fauna and strong structuring of tanaid assemblages by depth (Pabis et al 2015b). The use of DNA techniques for taxonomic purposes has revealed the existence of cryptic species in Southern Ocean fauna (e.g.…”

Section: Discussion Large-scale Patterns In Polychaete Assemblagesmentioning

confidence: 99%

Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas

et al. 2017

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Based on a dataset of 16,991 and 307 morphospecies of polychaete worms collected from 58 epibenthic sledge deployments across the Scotia and Amundsen Seas, we show that the structures of their shelf, deep-shelf and slope communities are composed of distinct polychaete assemblages spanning regions with Bhigh^, Bintermediate^, and Blow^biodi-versity. Depth has been identified as the main factor structuring the polychaete communities in both seas, countering the prevalent notion of extended eurybathy of the Southern Ocean benthos. From an evolutionary perspective, this strong dissimilarity between shelf and slope fauna could be interpreted as evidence for survival in shelf refugias, rather than migration into deeper waters during glacial maxima. The previously unsampled Amundsen Sea is shown to be diverse, harbouring a high level of taxonomic novelty, with many species new to science. The polychaete community of the inner shelf in the Amundsen Sea (Pine Island Bay) has also been shown to be of deep-sea character, likely due to intrusion of the Circumpolar Deep Water onto the shelf. In the Scotia Sea, our data support the notion of relatively high biodiversity of waters around the South Orkney Islands, South Georgia, and Shag Rocks (all recently established as Marine Protected Areas) and depressed diversity in the extreme environment of Southern Thule.

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Section: Discussion Large-scale Patterns In Polychaete Assemblagesmentioning

confidence: 99%

Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas

et al. 2017

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“…Pseudotanaidae (Sieg 1976) species represent a frequent and diverse element of deep-sea benthic assemblages, only exceeded by polychaetes 28,29 . The genus Pseudotanais is the most speciose within the family, formed by four species-groups: ‘affinis’, ‘denticulatus’, ‘forcipatus’ and ‘longisetosus’, based on morphological variation in key traits (e.g.…”

Section: Introductionmentioning

confidence: 99%

Deep ocean seascape and Pseudotanaidae (Crustacea: Tanaidacea) diversity at the Clarion-Clipperton Fracture Zone

Jakiel

Palero

Błażewicz

2019

Sci Rep

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Understanding the diversity and spatial distribution of benthic species is fundamental to properly assess the impact of deep sea mining. Tanaidacea provide an exceptional opportunity for assessing spatial patterns in the deep-sea, given their low mobility and limited dispersal potential. The diversity and distribution of pseudotanaid species is characterized here for the Clarion and Clipperton Fractures Zone (CCZ), which is the most extensive deposit field of metallic nodules. Samples were taken from the Belgian, German and French license areas, but also from the APEI 3 (Area of Particular Environmental Interest 3) of the Interoceanmetal consortium associates. The combination of morphological and genetic data uncovered one new pseudotanaid genus (Beksitanais n. gen.) and 14 new species of Pseudotanais (2 of them virtual taxa). Moreover, our results suggest that spatial structuring of pseudotanaid diversity is correlated with deep-sea features, particularly the presence of fractures and seamount chains crossing the CCZ. The presence of geographical barriers delimiting species distributions has important implications for the establishment of protected areas, and the APEI3 protected area contains only one third of the total pseudotanaid species in CCZ. The specimen collection studied here is extremely valuable and represents an important first step in characterizing the diversity and distribution of pseudotanaids within the Tropical Eastern Pacific.

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“…The IceAGE cruises carried out in 2011 and 2013 (Brix et al 2013) provided an opportunity to obtain a large collection of tanaidaceans and the family Pseudotanaidae Sieg, 1976 accounted for a substantial part of it (unpublished data of the authors). The family is widespread in the world's ocean, and its members being encountered within a wide depth range: from 0.5 to over 7000 m (Bird and Holdich 1989a;Błażewicz-Paszkowycz et al, 2012;Pabis et al 2015). Pseudotanaids have been reported from different habitats, e.g., hard bottom, algae, coral reefs, cold seeps, mud volcanos, and hydrothermal vents (Bird 1999;Błażewicz-Paszkowycz and Bamber 2011;Larsen, 2012;Stępień unpublished data).…”

Section: Introductionmentioning

confidence: 99%

A tip of the iceberg—Pseudotanaidae (Tanaidacea) diversity in the North Atlantic

2018

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During two IceAGE expeditions, a large collection of Tanaidacea was gathered from the shelf down to the slope (213−2750 m) in six areas off Iceland-the Irminger Basin, the Iceland Basin, the Norwegian Sea, the Denmark Strait, the Iceland-Faroe Ridge, and the Norwegian Channel. In this collection, members of the family Pseudotanaidae were most numerous component. We examined 40 samples collected with different gears (e.g., EBS, VVG. GKG), in which 323 pseudotanaid individuals were counted and covered a total depth from 213.9 to 2746.4 m. Morphological identification of the material has revealed the presence of five species: Akanthinotanais cf. longipes, Mystriocentrus biho sp. n. Pseudotanais misericorde sp. n., P. svavarssoni sp. n., and P. sigrunis sp. n. The description of the four new species has been presented in the paper and a rank of the subgenus Akanthinotanais is elevated to a genus rank. A large group of morphologically almost identical specimens, similar with P. svavarssoni sp. n. from a wide depth range and from various areas off Iceland was discriminated to species by applying morphometric methods; one distinct species (P. svavarssoni sp. n.) and complex of presumably cryptic species the species was discovered. Based on current data and literature records, similarity among fauna of Pseudotanaidae was assessed with applying Bray-Curtis formula. As results, potential zoogeographic regions in the North Atlantic have been distinguished.

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First insights into the deep-sea tanaidacean fauna of the Ross Sea: species richness and composition across the shelf break, slope and abyss

Cited by 22 publications

References 56 publications

Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas

Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas

Deep ocean seascape and Pseudotanaidae (Crustacea: Tanaidacea) diversity at the Clarion-Clipperton Fracture Zone

A tip of the iceberg—Pseudotanaidae (Tanaidacea) diversity in the North Atlantic

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