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Structural and functional diversity of Nematoda in relation with environmental variables in the Setúbal and Cascais canyons, Western Iberian Margin

Structural and functional diversity of Nematoda in relation with environmental variables in the Setúbal and Cascais canyons, Western Iberian Margin
Structural and functional diversity of Nematoda in relation with environmental variables in the Setúbal and Cascais canyons, Western Iberian Margin
Samples collected at two different depths (ca. 3200 and ca. 4200 m) in the Setúbal and Cascais canyons off the Portuguese coast, during the HERMES RRS Charles Darwin cruise CD179, were analysed for (1) sediment biogeochemistry (TOC, TN) and (2) composition, and structural and trophic diversity of nematode communities. Multivariate PERMANOVA analysis on the nematode community data revealed differences between sediment layers that were greater than differences between canyons, water depths, and stations. This suggests that biogeochemical gradients along the vertical sediment profile are crucial in determining nematode community structure. The interaction between canyon conditions and the nematode community is illustrated by biogeochemical patterns in the sediment and the prevalence of nematode genera that are able to persist in disturbed sediments. Trophic analysis of the nematode community indicated that non-selective deposit feeders are dominant, presumably because of their non-selective feeding behaviour compared to other feeding types, which gives them a competitive advantage in exploiting lower-quality food resources. This study presents a preliminary conceptual scheme for interactions between canyon conditions and the resident fauna.
Submarine canyons, NE Atlantic, Western Iberian Margin, Deep sea, Meiofauna, Nematodes, Biogeochemistry, Trophic Diversity, Community Structure, Conceptual Scheme, Canyon-Fauna Interaction
0967-0645
2354-2368
Ingels, Jeroen
5dbcfa51-def6-499e-b322-7d8709e3a672
Billett, David S.M.
aab439e2-c839-4cd2-815c-3d401e0468db
Kiriakoulakis, Konstadinos
8bca3454-1cd7-4ecc-b5a6-27a99b8836fd
Wolff, George A.
6b29d886-06f9-4405-8fab-33cfb436acaa
Vanreusel, Ann
29065a5d-c818-44d7-a81a-dac4da45b09e
Ingels, Jeroen
5dbcfa51-def6-499e-b322-7d8709e3a672
Billett, David S.M.
aab439e2-c839-4cd2-815c-3d401e0468db
Kiriakoulakis, Konstadinos
8bca3454-1cd7-4ecc-b5a6-27a99b8836fd
Wolff, George A.
6b29d886-06f9-4405-8fab-33cfb436acaa
Vanreusel, Ann
29065a5d-c818-44d7-a81a-dac4da45b09e

Ingels, Jeroen, Billett, David S.M., Kiriakoulakis, Konstadinos, Wolff, George A. and Vanreusel, Ann (2011) Structural and functional diversity of Nematoda in relation with environmental variables in the Setúbal and Cascais canyons, Western Iberian Margin. Deep Sea Research Part II: Topical Studies in Oceanography, 58 (23-24), 2354-2368. (doi:10.1016/j.dsr2.2011.04.002).

Record type: Article

Abstract

Samples collected at two different depths (ca. 3200 and ca. 4200 m) in the Setúbal and Cascais canyons off the Portuguese coast, during the HERMES RRS Charles Darwin cruise CD179, were analysed for (1) sediment biogeochemistry (TOC, TN) and (2) composition, and structural and trophic diversity of nematode communities. Multivariate PERMANOVA analysis on the nematode community data revealed differences between sediment layers that were greater than differences between canyons, water depths, and stations. This suggests that biogeochemical gradients along the vertical sediment profile are crucial in determining nematode community structure. The interaction between canyon conditions and the nematode community is illustrated by biogeochemical patterns in the sediment and the prevalence of nematode genera that are able to persist in disturbed sediments. Trophic analysis of the nematode community indicated that non-selective deposit feeders are dominant, presumably because of their non-selective feeding behaviour compared to other feeding types, which gives them a competitive advantage in exploiting lower-quality food resources. This study presents a preliminary conceptual scheme for interactions between canyon conditions and the resident fauna.

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More information

Published date: 1 December 2011
Keywords: Submarine canyons, NE Atlantic, Western Iberian Margin, Deep sea, Meiofauna, Nematodes, Biogeochemistry, Trophic Diversity, Community Structure, Conceptual Scheme, Canyon-Fauna Interaction
Organisations: Marine Biogeochemistry

Identifiers

Local EPrints ID: 189483
URI: https://eprints.soton.ac.uk/id/eprint/189483
ISSN: 0967-0645
PURE UUID: ae181fd9-cb40-4f78-ba57-a8c4c4417505

Catalogue record

Date deposited: 02 Jun 2011 11:24
Last modified: 16 Jul 2019 23:30

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