The University of Southampton
University of Southampton Institutional Repository

Macrofaunal nematodes of the deep Whittard Canyon (NE Atlantic): assemblage characteristics and comparison with polychaetes

Macrofaunal nematodes of the deep Whittard Canyon (NE Atlantic): assemblage characteristics and comparison with polychaetes
Macrofaunal nematodes of the deep Whittard Canyon (NE Atlantic): assemblage characteristics and comparison with polychaetes
Large nematodes form an important component of deep-sea macrofaunal assemblages, but are often considered to be part of the meiobenthos and are rarely studied. We analysed the standing stocks, diversity, and functional group and genus-level composition of macrofaunal nematodes at lower bathyal depths (3,500 m water depth) in the Whittard Canyon system (NE Atlantic) and on the adjacent continental slope. Five replicate sample sets were obtained using a Megacorer, at four locations (three canyon branches, one slope). Sediment samples were processed on a 500-?m mesh to provide both nematode and polychaete data from the same samples. The dominant nematode genera included Paramesacanthion, Metacylicolaimus, Cylicolaimus and Phanodermopsis. Nematode standing stocks (density and biomass) increased significantly from slope to canyon locations. Similarly, nematode dominance increased substantially (and diversity decreased) from slope to canyon locations. Nematode feeding groups and tail shape groups also appeared to exhibit common trends across study locations. Nematode genus-level faunal composition varied significantly between slope and canyon locations. We describe and discuss the broadly similar trends detected in the matching polychaete data, noting some differences in the polychaete density and diversity responses. We suggest that the similar trends in macrofaunal nematode and polychaete ecology across our four study locations reflect responses to both changing sedimentology and food availability.
deep sea, macrobenthos, nematodes, polychaetes, submarine canyon, Whittard Canyon
0173-9565
Gunton, Laetitia M.
5946910f-616b-4d88-8c4f-d5f8073f8ea6
Bett, Brian J.
61342990-13be-45ae-9f5c-9540114335d9
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Glover, Adrian G.
91192a3a-fc25-4c1f-b062-2e4da183272e
Vanreusel, Ann
29065a5d-c818-44d7-a81a-dac4da45b09e
Gunton, Laetitia M.
5946910f-616b-4d88-8c4f-d5f8073f8ea6
Bett, Brian J.
61342990-13be-45ae-9f5c-9540114335d9
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Glover, Adrian G.
91192a3a-fc25-4c1f-b062-2e4da183272e
Vanreusel, Ann
29065a5d-c818-44d7-a81a-dac4da45b09e

Gunton, Laetitia M., Bett, Brian J., Gooday, Andrew J., Glover, Adrian G. and Vanreusel, Ann (2017) Macrofaunal nematodes of the deep Whittard Canyon (NE Atlantic): assemblage characteristics and comparison with polychaetes. Marine Ecology, 38 (2). (doi:10.1111/maec.12408).

Record type: Article

Abstract

Large nematodes form an important component of deep-sea macrofaunal assemblages, but are often considered to be part of the meiobenthos and are rarely studied. We analysed the standing stocks, diversity, and functional group and genus-level composition of macrofaunal nematodes at lower bathyal depths (3,500 m water depth) in the Whittard Canyon system (NE Atlantic) and on the adjacent continental slope. Five replicate sample sets were obtained using a Megacorer, at four locations (three canyon branches, one slope). Sediment samples were processed on a 500-?m mesh to provide both nematode and polychaete data from the same samples. The dominant nematode genera included Paramesacanthion, Metacylicolaimus, Cylicolaimus and Phanodermopsis. Nematode standing stocks (density and biomass) increased significantly from slope to canyon locations. Similarly, nematode dominance increased substantially (and diversity decreased) from slope to canyon locations. Nematode feeding groups and tail shape groups also appeared to exhibit common trends across study locations. Nematode genus-level faunal composition varied significantly between slope and canyon locations. We describe and discuss the broadly similar trends detected in the matching polychaete data, noting some differences in the polychaete density and diversity responses. We suggest that the similar trends in macrofaunal nematode and polychaete ecology across our four study locations reflect responses to both changing sedimentology and food availability.

Text
Gunton et al. .docx - Accepted Manuscript
Download (4MB)

More information

Accepted/In Press date: 5 September 2016
e-pub ahead of print date: 16 December 2016
Published date: 19 April 2017
Keywords: deep sea, macrobenthos, nematodes, polychaetes, submarine canyon, Whittard Canyon
Organisations: Ocean and Earth Science, Marine Biogeochemistry

Identifiers

Local EPrints ID: 404066
URI: https://eprints.soton.ac.uk/id/eprint/404066
ISSN: 0173-9565
PURE UUID: 7f0b7817-172a-4366-a332-85e4a265d402

Catalogue record

Date deposited: 19 Dec 2016 15:21
Last modified: 03 Dec 2019 06:25

Export record

Altmetrics

Contributors

Author: Laetitia M. Gunton
Author: Brian J. Bett
Author: Andrew J. Gooday
Author: Adrian G. Glover
Author: Ann Vanreusel

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×