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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, J.; Billett, D.S.M.; Kiriakoulakis, K.; Wolff, G.A.; Vanreusel, A. (2011). Structural and functional diversity of Nematoda in relation with environmental variables in the Setúbal and Cascais canyons, Western Iberian Margin. Deep-Sea Res., Part II, Top. Stud. Oceanogr. 58(23-24): 2354-2368. http://dx.doi.org/10.1016/j.dsr2.2011.04.002 In: Deep-Sea Research, Part II. Topical Studies in Oceanography. Pergamon: Oxford. ISSN 0967-0645; e-ISSN 1879-0100

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 228670 [ download pdf ]

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Trefwoorden

Biodiversity Chemistry > Geochemistry > Biogeochemistry Composition > Community composition Deep sea Interactions Meiofauna Topographic features > Submarine features > Submarine canyons Nematoda [WoRMS] ANE, Atlantic [Marine Regions]; ANE, Europe, Iberian Peninsula [Marine Regions] Marien/Kust

Author keywords

Submarine canyons; NE Atlantic; Western Iberian Margin; Deep sea;Meiofauna; Nematodes; Biogeochemistry; Trophic Diversity; CommunityStructure; Conceptual Scheme; Canyon-Fauna Interaction

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Auteurs		Top
Ingels, J. Billett, D.S.M. Kiriakoulakis, K.	Wolff, G.A. Vanreusel, A.

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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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