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Deep-sea scavenging amphipod assemblages from the submarine canyons of the Western Iberian Peninsula

Deep-sea scavenging amphipod assemblages from the submarine canyons of the Western Iberian Peninsula
Deep-sea scavenging amphipod assemblages from the submarine canyons of the Western Iberian Peninsula
Submarine canyons have often been identified as hotspots of secondary production with the potential to house distinct faunal assemblages and idiosyncratic ecosystems. Within these deep-sea habitats, assemblages of scavenging fauna play a vital role in reintroducing organic matter from large food falls into the wider deep-sea food chain.

Free-fall baited traps were set at different depths within three submarine canyons on the Iberian Margin. Amphipods from the traps were identified to species level and counted. Scavenging amphipod assemblages were compared at different depths within each canyon and between individual canyon systems. Using data from literature, abyssal plain assemblages were compared to submarine canyon assemblages. Samples from canyons were found to contain common abyssal plain species but in greater than expected abundances. It is proposed that this is a result of the high organic carbon input into canyon systems owing to their interception of sediment from the continental shelf and input from associated estuarine systems. Community composition differed significantly between the submarine canyons and abyssal plains. The cause of this difference cannot be attributed to one environmental variable due to the numerous inherent differences between canyons and abyssal plains.
1726-4170
4861-4869
Duffy, G.A.
25bd4af5-7114-4d17-a40a-e113e1ef15a6
Horton, T.
c4b41665-f0bc-4f0f-a7af-b2b9afc02e34
Billett, D.S.M.
aab439e2-c839-4cd2-815c-3d401e0468db
Duffy, G.A.
25bd4af5-7114-4d17-a40a-e113e1ef15a6
Horton, T.
c4b41665-f0bc-4f0f-a7af-b2b9afc02e34
Billett, D.S.M.
aab439e2-c839-4cd2-815c-3d401e0468db

Duffy, G.A., Horton, T. and Billett, D.S.M. (2012) Deep-sea scavenging amphipod assemblages from the submarine canyons of the Western Iberian Peninsula. Biogeosciences, 9, 4861-4869. (doi:10.5194/bg-9-4861-2012).

Record type: Article

Abstract

Submarine canyons have often been identified as hotspots of secondary production with the potential to house distinct faunal assemblages and idiosyncratic ecosystems. Within these deep-sea habitats, assemblages of scavenging fauna play a vital role in reintroducing organic matter from large food falls into the wider deep-sea food chain.

Free-fall baited traps were set at different depths within three submarine canyons on the Iberian Margin. Amphipods from the traps were identified to species level and counted. Scavenging amphipod assemblages were compared at different depths within each canyon and between individual canyon systems. Using data from literature, abyssal plain assemblages were compared to submarine canyon assemblages. Samples from canyons were found to contain common abyssal plain species but in greater than expected abundances. It is proposed that this is a result of the high organic carbon input into canyon systems owing to their interception of sediment from the continental shelf and input from associated estuarine systems. Community composition differed significantly between the submarine canyons and abyssal plains. The cause of this difference cannot be attributed to one environmental variable due to the numerous inherent differences between canyons and abyssal plains.

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Published date: 2012
Organisations: Marine Biogeochemistry, Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 346657
URI: http://eprints.soton.ac.uk/id/eprint/346657
ISSN: 1726-4170
PURE UUID: 1e766149-b0bf-436c-8f4b-2815548faa8e

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Date deposited: 31 Jan 2013 17:18
Last modified: 14 Mar 2024 12:39

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Contributors

Author: G.A. Duffy
Author: T. Horton
Author: D.S.M. Billett

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