Preliminary data on suprabenthic invertebrates collected during the RV Polarstern cruise in the Laptev Sea

Sirenko, B. I.; Markhaseva, Elena L.; Buzhinskaya, G. N.; Golikov, A. A.; Menshutkina, T. V.; Petryashov, V. V.; Semenova, T. N.; Vassilenko, S. V.

doi:10.1007/s003000050063

Cited by 10 publications

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“…This point has been made abundantly clear by recent ROV observations ), suggesting we have much to learn about both biodiversity at these depths, as well as the potentially significant ecological role of some of these species. Similarly, the smallest crustacean species (e.g., Heron and Damkaer 1984), and the hyperbenthic habitat, to which many of the recently described copepod species have affinity, remain virtually unsampled within the basins (Sirenko et al 1996;Markhaseva 1998). As indicated by the relatively large number of recently collected "new" species reported here, there is much still to be resolved and discovered with the Arctic's zooplankton, despite its seemingly low diversity.…”

Section: Discussionmentioning

confidence: 73%

“…All the 19 common endemic species listed here, have been known from the Arctic for decades or longer (Brodsky 1950(Brodsky , 1967Dunbar and Harding 1968;Shirley and Leung 1970) and have not been found in any unispinosus, Xanthocalanus polarsternae, X. spinodenticulatus) were collected only in the Amundsen and Nansen Basins (Markhaseva 1998), using a benthopelagic trawl (Sirenko et al 1996), while copepods from the families Tharybidae and Discoidae (Brodskius sp. n., Discoidea sp.…”

Section: Discussionmentioning

confidence: 99%

“…From eight to ten separate successive depth strata from the bottom to the surface were sampled. During the 1993, 1995, 1996, 1997Polarstern and 2005 Healy expeditions, zooplankton were collected vertically with a Multinet Type Midi (Hydrobios, Kiel, 0.25 m 2 mouth opening, 150 μm mesh size). During the 1998 and 2007 Polarstern expeditions, a Multinet Type Maxi (0.5 m 2 mouth opening, 150 μm mesh size) was deployed.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, the absence of appropriate identification keys for the non-copepod Arctic fauna made identification challenging compared with detailed accounts available for the copepods from the Norwegian Polar expeditions (Sars 1900) and much improved later keys (Brodsky 1950(Brodsky , 1967. Only much later did poorly distributed identification keys (Tencati 1970;Leung 1970aLeung ,b, 1971Leung , 1972Shirley and Leung 1970;Dawson 1971;Leung et al 1971;Yingst 1972) and species accounts for one or more (Scott 1969;Pautzke 1979;Kosobokova 1981;Mumm 1993;Sirenko et al 1996;Kosobokova et al 1998;Auel and Hagen 2002;Kosobokova and Hirche 2000;Hopcroft et al 2005;Raskoff et al 2005Raskoff et al , 2010Kosobokova and Hopcroft 2010) of the neglected groups appear.…”

Section: Introductionmentioning

confidence: 97%

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Patterns of zooplankton diversity through the depths of the Arctic’s central basins

2010

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Metazoan zooplankton diversity is characterized for the oceanic environments of the Arctic Ocean, specifically the deep Nansen, Amundsen, Makarov and Canada Basins. Our species inventory is based on original records from 134 locations where stratified sampling of the entire water column was conducted from the surface to the bottom (or a maximum of 3,000 m) during seven icebreaker expeditions (RV Polarstern, 1993, USCGC Healy, 2005 and two older expeditions of the Russian drifting ice stations North Pole 22 and 23 . Representatives of eight large metazoan taxa, including Cnidaria, Ctenophora, Mollusca, Annelida, Nemertea, Crustacea, Chaetognatha, and Larvacea, all predominately oceanic species, are registered, with a total of 174 species. Crustaceans strongly dominate in terms of the species number (70%), and copepods are the most diverse group amongst them. Comparison with the historical data suggests that the composition of epi-and mesopelagic zooplankton is relatively well characterized to date, while a considerable number of species we encountered in the bathypelagic layers were either unrecorded before, or undescribed. There appears to be no zoogeographical barrier between the Eurasian and Canadian basins throughout the entire depth range. All deep-water and endemic species are found on both sides of the Lomonosov Ridge, suggesting effective exchange of the deep fauna across the ridge. Notable differences in the species composition in the upper and midwater layers are related to the occurrence of Atlantic and Pacific expatriates advected with their respective waters either into the Eastern or Western Arctic. A pronounced increase in Pielou's evenness (J'), Shannon's diversity (H'), and Margalef's species richness (d) indices with depth, with a maximum occurring within the Atlantic layer, followed by a decrease in the deeper layers, was typical for all deep basins. Species-specific depth preferences and ranges result in statistically distinct communities at different depths with high within-depth similarity (60-80%). Differences were detectable between cruises in the epi-and mesopelagic layers (driven by the expatriates), but less so in the bathypelagic zone.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Patterns of zooplankton diversity through the depths of the Arctic’s central basins

2010

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“…Parabradyidius, first described from the Southern Ocean, might also be present in the North Atlantic, but this record awaits verification . Regarding the benthopelagic calanoids, the Arctic aetideid fauna is poorly studied, and only four benthopelagic/predominantly benthopelagic genera are recorded so far (Bradyidius, Comantenna, Jaschnovia and Pseudeuchaeta), while in the Indian Ocean, only Pterochirella is reported (Markhaseva 1996;Sirenko et al 1996;Schulz and Markhaseva 2000;Schulz 2002;Bradford-Grieve 2003;Schulz 2006, 2008;Ohtsuka et al 2005;Renz and Markhaseva 2015).…”

Section: Discussionmentioning

confidence: 95%

Description of Pseudeuchaeta vulgaris n. sp. (Copepoda: Calanoida), a new aetideid species from the deep Pacific Ocean with notes on the biogeography of benthopelagic aetideid calanoids

2016

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A new aetideid species Pseudeuchaeta vulgaris sp. nov. is described from females collected at abyssal depths above the seabed from the Clarion Clipperton Fracture Zone in the equatorial northeastern Pacific. It belongs to the benthopelagic group of Pseudeuchaeta Sars, 1905 species. The new species is distinguished from all congeners by two setae present on the maxillule proximal basal endite. It is closely related to P. magna Bradford, 1969 and P. major (Wolfenden, 1911), as all three species share a mandible endopod segment 2 with 4-5 setae and the P1 exopod segment 1 lacking a lateral spine. The new species is the fourth benthopelagic representative of the genus found in the abyssal near-bottom environment of the Pacific Ocean and the first benthopelagic Pseudeuchaeta species recorded in the tropical Pacific. An illustrated overview on the distribution of the genus Pseudeuchaeta is given together with notes on the biogeography of benthopelagic aetideid calanoids in the world's ocean. While some genera show a nearly worldwide distribution, only few species have been reported in more than one ocean so far. This reflects the undersampling of the benthopelagial in the deep ocean.

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Macrofauna Techniques

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Moore²

2005

Methods for the Study of Marine Benthos

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Preliminary data on suprabenthic invertebrates collected during the RV Polarstern cruise in the Laptev Sea

Cited by 10 publications

References 0 publications

Patterns of zooplankton diversity through the depths of the Arctic’s central basins

Patterns of zooplankton diversity through the depths of the Arctic’s central basins

Description of Pseudeuchaeta vulgaris n. sp. (Copepoda: Calanoida), a new aetideid species from the deep Pacific Ocean with notes on the biogeography of benthopelagic aetideid calanoids

Macrofauna Techniques

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