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

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), pp. 2354-2368. (doi:10.1016/j.dsr2.2011.04.002).

Record type: Article


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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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


Local EPrints ID: 189483
ISSN: 0967-0645
PURE UUID: ae181fd9-cb40-4f78-ba57-a8c4c4417505

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Date deposited: 02 Jun 2011 11:24
Last modified: 18 Jul 2017 11:40

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Author: Jeroen Ingels
Author: David S.M. Billett
Author: Konstadinos Kiriakoulakis
Author: George A. Wolff
Author: Ann Vanreusel

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