Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic
New baseline information is presented on biogeography, abundance and distribution of euphausiids from discrete depth samples collected throughout the water column to 3000 m at 42 locations along the Mid-Atlantic Ridge (MAR) between Iceland and the Azores. Eighteen species were recorded, with Euphaus...
Published in: | Journal of Plankton Research |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/abundance-patterns-and-species-assemblages-of-euphausiids-associated-with-the-midatlantic-ridge-north-atlantic(84e642ca-6612-4407-a581-ad2540eb0666).html https://doi.org/10.1093/plankt/fbr056 |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/84e642ca-6612-4407-a581-ad2540eb0666 2023-05-15T15:08:41+02:00 Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic Letessier, Tom B. Falkenhaug, Tone Debes, Hogni Bergstad, Odd Aksel Brierley, Andrew S. 2011-10 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/abundance-patterns-and-species-assemblages-of-euphausiids-associated-with-the-midatlantic-ridge-north-atlantic(84e642ca-6612-4407-a581-ad2540eb0666).html https://doi.org/10.1093/plankt/fbr056 eng eng info:eu-repo/semantics/restrictedAccess Letessier , T B , Falkenhaug , T , Debes , H , Bergstad , O A & Brierley , A S 2011 , ' Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic ' , Journal of Plankton Research , vol. 33 , no. 10 , pp. 1510-1525 . https://doi.org/10.1093/plankt/fbr056 zooplankton Euphausiacea oceanic deepwater biogeography communities Mid-Atlantic Ridge BENTHIC BOUNDARY-LAYER IRMINGER SEA MEGANYCTIPHANES-NORVEGICA THYSANOESSA-LONGICAUDATA ZOOPLANKTON ABUNDANCE VERTICAL-DISTRIBUTION POPULATION-STRUCTURE OCEAN JUNE AZORES article 2011 ftunstandrewcris https://doi.org/10.1093/plankt/fbr056 2022-06-02T07:40:42Z New baseline information is presented on biogeography, abundance and distribution of euphausiids from discrete depth samples collected throughout the water column to 3000 m at 42 locations along the Mid-Atlantic Ridge (MAR) between Iceland and the Azores. Eighteen species were recorded, with Euphausia krohni and Thysanoessa longicaudata being most abundant. Eight species had not been recorded in the area previously. The Subpolar Front is a northern boundary to some southern species, but not a southern boundary to northern ubiquitous species that show submergence. Four major species assemblages were identified and characterized in terms of spatial distribution and species composition. Numerical abundance was highly variable but decreased logarithmically with depth. The greatest average abundance and the greatest spatial variation in abundance occurred in northern waters, over the Reykjanes Ridge. Abundance declined less with depth in the sub-Arctic Intermediate Water/North Atlantic Current Water than in other areas and water masses. The near bottom layer (0-200 m from the seabed) had typically low density of euphausiids. The MAR is generally deeper than the usual depth distribution of euphausiids (0-300 m), but many species conduct vertical migrations to ridge crest depths. Euphausiid distribution and abundance patterns appeared only weakly affected by the MAR. Article in Journal/Newspaper Arctic Iceland Meganyctiphanes norvegica north atlantic current North Atlantic Zooplankton University of St Andrews: Research Portal Arctic Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Mid-Atlantic Ridge Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Journal of Plankton Research 33 10 1510 1525 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
zooplankton Euphausiacea oceanic deepwater biogeography communities Mid-Atlantic Ridge BENTHIC BOUNDARY-LAYER IRMINGER SEA MEGANYCTIPHANES-NORVEGICA THYSANOESSA-LONGICAUDATA ZOOPLANKTON ABUNDANCE VERTICAL-DISTRIBUTION POPULATION-STRUCTURE OCEAN JUNE AZORES |
spellingShingle |
zooplankton Euphausiacea oceanic deepwater biogeography communities Mid-Atlantic Ridge BENTHIC BOUNDARY-LAYER IRMINGER SEA MEGANYCTIPHANES-NORVEGICA THYSANOESSA-LONGICAUDATA ZOOPLANKTON ABUNDANCE VERTICAL-DISTRIBUTION POPULATION-STRUCTURE OCEAN JUNE AZORES Letessier, Tom B. Falkenhaug, Tone Debes, Hogni Bergstad, Odd Aksel Brierley, Andrew S. Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic |
topic_facet |
zooplankton Euphausiacea oceanic deepwater biogeography communities Mid-Atlantic Ridge BENTHIC BOUNDARY-LAYER IRMINGER SEA MEGANYCTIPHANES-NORVEGICA THYSANOESSA-LONGICAUDATA ZOOPLANKTON ABUNDANCE VERTICAL-DISTRIBUTION POPULATION-STRUCTURE OCEAN JUNE AZORES |
description |
New baseline information is presented on biogeography, abundance and distribution of euphausiids from discrete depth samples collected throughout the water column to 3000 m at 42 locations along the Mid-Atlantic Ridge (MAR) between Iceland and the Azores. Eighteen species were recorded, with Euphausia krohni and Thysanoessa longicaudata being most abundant. Eight species had not been recorded in the area previously. The Subpolar Front is a northern boundary to some southern species, but not a southern boundary to northern ubiquitous species that show submergence. Four major species assemblages were identified and characterized in terms of spatial distribution and species composition. Numerical abundance was highly variable but decreased logarithmically with depth. The greatest average abundance and the greatest spatial variation in abundance occurred in northern waters, over the Reykjanes Ridge. Abundance declined less with depth in the sub-Arctic Intermediate Water/North Atlantic Current Water than in other areas and water masses. The near bottom layer (0-200 m from the seabed) had typically low density of euphausiids. The MAR is generally deeper than the usual depth distribution of euphausiids (0-300 m), but many species conduct vertical migrations to ridge crest depths. Euphausiid distribution and abundance patterns appeared only weakly affected by the MAR. |
format |
Article in Journal/Newspaper |
author |
Letessier, Tom B. Falkenhaug, Tone Debes, Hogni Bergstad, Odd Aksel Brierley, Andrew S. |
author_facet |
Letessier, Tom B. Falkenhaug, Tone Debes, Hogni Bergstad, Odd Aksel Brierley, Andrew S. |
author_sort |
Letessier, Tom B. |
title |
Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic |
title_short |
Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic |
title_full |
Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic |
title_fullStr |
Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic |
title_full_unstemmed |
Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic |
title_sort |
abundance patterns and species assemblages of euphausiids associated with the mid-atlantic ridge, north atlantic |
publishDate |
2011 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/abundance-patterns-and-species-assemblages-of-euphausiids-associated-with-the-midatlantic-ridge-north-atlantic(84e642ca-6612-4407-a581-ad2540eb0666).html https://doi.org/10.1093/plankt/fbr056 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Arctic Irminger Sea Mid-Atlantic Ridge Reykjanes |
geographic_facet |
Arctic Irminger Sea Mid-Atlantic Ridge Reykjanes |
genre |
Arctic Iceland Meganyctiphanes norvegica north atlantic current North Atlantic Zooplankton |
genre_facet |
Arctic Iceland Meganyctiphanes norvegica north atlantic current North Atlantic Zooplankton |
op_source |
Letessier , T B , Falkenhaug , T , Debes , H , Bergstad , O A & Brierley , A S 2011 , ' Abundance patterns and species assemblages of euphausiids associated with the Mid-Atlantic Ridge, North Atlantic ' , Journal of Plankton Research , vol. 33 , no. 10 , pp. 1510-1525 . https://doi.org/10.1093/plankt/fbr056 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1093/plankt/fbr056 |
container_title |
Journal of Plankton Research |
container_volume |
33 |
container_issue |
10 |
container_start_page |
1510 |
op_container_end_page |
1525 |
_version_ |
1766339996561702912 |