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Titre du document / Document title

The occurrence of the cold-water coral Lophelia pertusa (Scleractinia) on oil and gas platforms in the North Sea : Colony growth, recruitment and environmental controls on distribution

Auteur(s) / Author(s)

GASS Susan E. (1) ; ROBERTS J. Murray (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll PA37 1QA, ROYAUME-UNI

Résumé / Abstract

This study reports a newly established sub-population of Lophelia pertusa, the dominant reef-framework forming coral species in the north-east Atlantic, on oil and gas platforms in the northern North Sea. L. pertusa was positively identified on 13 of 14 platforms examined using existing oil and gas industry visual inspections. Two platforms were inspected in more detail to examine depth and colony size distributions. We recorded 947 colonies occurring between 59 and 132 m depth that coincides with cold Atlantic water at depths below the summer thermocline in the northern North Sea. We suggest that these colonies provide evidence for a planktonic larval stage of L. pertusa with recruits initially originating from populations in the north-east Atlantic and now self recruiting to the platforms. Size class distribution showed a continuous range of size classes, but with few outlying large colonies. The break between the largest colonies and the rest of the population is considered as the point when colonies began self recruiting to the platforms, resulting in greater colonization success. We present the first documented in situ colony growth rate estimate (26 ± 5 mm yr-1) for L. pertusa based on 15 colonies from the Tern Alpha platform with evidence for yearly recruitment events starting the year the platform was installed. Evidence of contamination from drill muds and cuttings was observed on the Heather platform but appeared limited to regions close to drilling discharge points, where colonies experience partial as well as whole colony mortality.

Revue / Journal Title

Marine pollution bulletin    ISSN  0025-326X   CODEN MPNBAZ 

Source / Source

2006, vol. 52, no5, pp. 549-559 [11 page(s) (article)] (1 p.1/4)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1970) (Revue)

Mots-clés anglais / English Keywords

Invertebrata

;

Coelenterata

;

Aquatic environment

;

Environmental factor

;

Scleractinia

;

Cnidaria

;

Temperature

;

Water pollution

;

Marine environment

;

Recruitment

;

Growth

;

Colony

;

North Sea

;

Offshore drilling platform

;

Coral

;

Cold

;

Mots-clés français / French Keywords

Invertebrata

;

Coelenterata

;

Milieu aquatique

;

Facteur milieu

;

Lophelia pertusa

;

Scleractinia

;

Cnidaria

;

Température

;

Pollution eau

;

Milieu marin

;

Recrutement

;

Croissance

;

Colonie

;

Mer du Nord

;

Plateforme forage

;

Corail

;

Froid

;

Mots-clés espagnols / Spanish Keywords

Invertebrata

;

Coelenterata

;

Medio acuático

;

Factor medio

;

Scleractinia

;

Cnidaria

;

Temperatura

;

Contaminación agua

;

Medio marino

;

Contratación

;

Crecimiento

;

Colonia

;

Mar del Norte

;

Plataforma perforación

;

Coral

;

Frío

;

Mots-clés d'auteur / Author Keywords

Cold-water coral

;

Lophelia pertusa

;

North Sea

;

Environmental sensitivity

;

Oil and gas

;

Localisation / Location

INIST-CNRS, Cote INIST : 15112, 35400015310486.0090

Nº notice refdoc (ud4) : 17830117



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