Diversity and Taxonomy of Ampharetidae (Polychaeta) from Icelandic Waters

Parapar, Julio; Helgason, Gudmundur V.; Jirkov, I. A.; Moreira, Juan

doi:10.2478/popore-2014-0019

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…Several taxa found in the PLAIN group have not been recorded in the Central deep-sea Arctic so far. The polychaete Ymerana pteropoda was previously known from one locality north from Svalbard [52], one locality in the Canada Basin north from Alaska [53] and two localities north-east off Iceland [54]. In our samples this species was present and even dominant in terms of density at five stations.…”

Section: Discussionsupporting

confidence: 51%

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Vedenin

Gusky

Gebruk

et al. 2018

Preprint

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24Permanent ice coverage and the low primary production in the mostly ice-covered Central Arctic 25 ocean basins result in significantly lower biomass and density of macrobenthos in the abyssal 26 plains compared to the continental slopes. However, little is known on bathymetric and regional 27 effects on macrobenthos diversity. This study synthesizes new and available macrobenthos data 28 to provide a baseline for future studies of the effects of Arctic change on macrofauna community 29 composition in the Arctic basins. Samples taken during three expeditions (in 1993, 2012 and 30 2015) at 37 stations on the slope of the Barents and Laptev Seas and in the abyssal of the Nansen 31 and Amundsen Basins in the depth range from 38 m to 4381 m were used for a quantitative 32 analysis of species composition, abundance and biomass. Benthic communities clustered in five 33 depth ranges across the slope and basin. A parabolic pattern of species diversity change with 34 depth was found, with the diversity maximum for macrofauna at the shelf edge at depths of 100-35 300 m. This deviates from the typical species richness peak at mid-slope depths of 1500-3000 m 36 in temperate oceans. Due to the limited availability of standardized benthos data, it remains 37 difficult to assess the massive sea ice retreat observed in the past decade has affected benthic 38 community composition. The polychaete Ymerana pteropoda and the bryozoan Nolella sp. were 39 found for the first time in the deep Nansen and Amundsen Basins, as a potential first sign of 40 increasing productivity and carbon flux with the thinning ice. 41 expeditions in 1993 and 1995, nine bathymetric transects were made at the northern slopes of 69 Barents, Kara and Laptev Seas from shelf to abyssal depths. Results of these surveys were partly 70 published by [11], [15] and [16]. The present study provides additional analyses of legacy 71 samples from these expeditions and adds a substantial number of new data from surveys during 72 the sea-ice minimum in 2012 [6,17]. 73 Patterns of bathymetric distribution of benthic fauna were previously reviewed for different 74 temperate and tropical ocean regions [18][19][20][21][22][23]. According to generally recognised patterns, the 75 density and the biomass of macrobenthos decrease with depth due to the declining flux of 76 particulate matter as main food supply. In contrast, species diversity shows a parabolic pattern 77 with a maximum at depths of 1500-3000 m [24][25][26][27]. In the Arctic, the known species diversity of 78 around 1100 taxa does not appear to follow this pattern, and no mid-depth peak of diversity was 79 yet detected, potentially due to the strongly limited food supply (summarised in [28]). 80This hypothesis is supported by recent studies of horizontal distribution patterns of 81 macrofauna within the deep-sea Central Arctic. From the shelf to the deep-sea basins, food 82 supply is declining not only because of increasing water depth, but also because northwards, the 83 sun angle and the sea-i...

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Section: Discussionsupporting

confidence: 51%

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Vedenin

Gusky

Gebruk

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…Several taxa found in the PLAIN group have not been recorded in the Central deep-sea Arctic so far. The polychaete Ymerana pteropoda was previously known from one locality north from Svalbard [ 55 ], one locality in the Canada Basin north from Alaska [ 56 ] and two localities north-east off Iceland [ 57 ]. In our samples this species was present and even dominant in terms of density at five stations.…”

Section: Discussionmentioning

confidence: 99%

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

et al. 2018

View full text Add to dashboard Cite

Permanent sea-ice cover and low primary productivity in the mostly ice-covered Central Arctic ocean basins result in significantly lower biomass and density of macrobenthos in the abyssal plains compared to the continental slopes. However, little is known on bathymetric and regional effects on the macrobenthos diversity. This study synthesizes new and available macrobenthos data to provide a baseline for future studies of the effects of Arctic change on macrofauna community composition in the Arctic basins. Samples collected during three expeditions (in 1993, 2012 and 2015) at 37 stations on the slope of the Barents and Laptev Seas and in the abyssal of the Nansen and Amundsen Basins in the depth range from 38 m to 4381 m were used for a quantitative analysis of species composition, abundance and biomass. Benthic communities clustered in five depth ranges across the slope and basin. A parabolic pattern of species diversity change with depth was found, with the diversity maximum for macrofauna at the shelf edge at depths of 100–300 m. This deviates from the typical species richness peak at mid-slope depths of 1500–3000 m in temperate oceans. Due to the limited availability of standardized benthos data, it remains difficult to assess if and how the significant sea-ice loss observed in the past decade has affected benthic community composition. The polychaete Ymerana pteropoda and the bryozoan Nolella sp. were found for the first time in the deep Nansen and Amundsen Basins.

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“…The Anobothrus species reported in NE Atlantic waters are A. gracilis (Malmgren, 1866) and A. patersoni Jirkov, 2008. Anobothrus gracilis is a species described from Swedish coasts and has a wide distribution in the Arctic Ocean, North Atlantic Ocean (Iceland to Swedish West coast), and NW Pacific Ocean (Jirkov, 2008(Jirkov, , 2011Parapar et al, 2014). Anobothrus patersoni is an exclusively abyssal species (3260 -8292 m depth) described from North Pacific (Japan) but recorded also in the North Atlantic (Jirkov, 2008).…”

Section: Description ( Based On Holotype and Paratypes )mentioning

confidence: 99%

Anobothrus amourouxisp. nov., a new species of Ampharetidae (Polychaeta) from the Capbreton Canyon (Bay of Biscay, NE Atlantic Ocean)

Bonifácio

Lavesque²,

Bachelet³

et al. 2015

J. Mar. Biol. Ass.

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International audienceA new species of Ampharetidae, Anobothrus amourouxi sp. nov., has been identified from bathyal depths of the Capbreton Canyon, Bay of Biscay (NE Atlantic Ocean). This new species is characterized by inner branchiae with transversal ciliated ridges, notochaetae from modified eighth thoracic unciniger with hirsute tips, uncini from thoracic unciniger with 6–7 teeth in lateral view arranged in two vertical rows in frontal view, fused segments II + III with paleae from SII and reduced notopodia without chaetae from SIII. An identification key for all hitherto described species of the genus Anobothrus is provided

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Diversity and Taxonomy of Ampharetidae (Polychaeta) from Icelandic Waters

Cited by 8 publications

References 21 publications

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Anobothrus amourouxisp. nov., a new species of Ampharetidae (Polychaeta) from the Capbreton Canyon (Bay of Biscay, NE Atlantic Ocean)

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