The effect of the North Atlantic Subpolar Front as a boundary in pelagic biogeography decreases with increasing depth and organism size.

Vecchione, Michael, Falkenhaug, Tone, Sutton, Tracey, Cook, April, Gislason, Astthor, Hansen, Hege Øverbø, Heino, Mikko, Miller, Peter I., Piatkowski, Uwe , Porteiro, Filipe, Søiland, Henrik and Bergstad, Odd Aksel (2015) The effect of the North Atlantic Subpolar Front as a boundary in pelagic biogeography decreases with increasing depth and organism size. Progress in Oceanography, 138 . pp. 105-115. DOI 10.1016/j.pocean.2015.08.006.

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Abstract

Highlights:
• The Subpolar Front is distinct along its northern edge but to the south it forms a more diffuse zone.
• North-south water-mass hydrography is strongest down to depths of 500–800 m.
• The frontal biogeographic signature is strong near the surface but decreases with greater depth.
• This strong surface feature is therefore not a good predictor of deep pelagic biogeography.

Broad-scale patterns in the distribution of deep-sea pelagic species and communities are poorly known. An important question is whether biogeographic boundaries identified from surface features are important in the deep mesopelagic and bathypelagic. We present community analyses of discrete-depth samples of mesozooplankton and micronekton to full-ocean depth collected in the area where the Mid-Atlantic Ridge is crossed by the Subpolar Front. The results show that the distributional discontinuity associated with the front, which is strong near the surface, decreases with increasing depth. Both the frontal separation near the surface and the community convergence at increasing depths were clearer for mesozooplankton than for micronekton

Document Type: Article
Additional Information: WOS:000367106900008
Keywords: GIBBS-FRACTURE-ZONE; SOUTHERN-OCEAN; RIDGE; DEEP; PATTERNS; BIODIVERSITY; CIRCULATION; DIVERSITY; ABUNDANCE; ECOSYSTEM
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.pocean.2015.08.006
ISSN: 0079-6611
Projects: MAR-ECO, Future Ocean
Date Deposited: 10 Dec 2015 12:44
Last Modified: 19 Dec 2017 12:49
URI: http://oceanrep.geomar.de/id/eprint/30494

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