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The presence of Melinna palmata (Annelida: Polychaeta) and Ensis directus (Mollusca: Bivalvia) related to sedimentary changes in the Bay of Seine (English Channel, France) Dauvin, J.-C.; Ruellet, T.; Thiebaut, E.; Gentil, F.; Desroy, N.; Janson, A.-L.; Duhamel, S.; Jourde, J.; Simon, S. (2007). The presence of Melinna palmata (Annelida: Polychaeta) and Ensis directus (Mollusca: Bivalvia) related to sedimentary changes in the Bay of Seine (English Channel, France). Cah. Biol. Mar. 48(4): 391-401 In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 289464 [ download pdf ]

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Trefwoorden

Alien species Ecosystem disturbance New records Ensis directus (Conrad, 1844) sensu Abbott, 1954 [WoRMS]; Ensis directus (Conrad, 1844) sensu Abbott, 1954 [WoRMS]; Melinna palmata Grube, 1870 [WoRMS]; Melinna palmata Grube, 1870 [WoRMS] ANE, France, Seine Bay [Marine Regions]; ANE, Kanaal [Marine Regions] Marien/Kust

Author keywords

Melinna palmata; Ensis directus; Bay of Seine; English Channel; range expansion; new records; environmental disturbances; invasive species

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Auteurs		Top
Dauvin, J.-C., meer Ruellet, T. Thiebaut, E., meer	Gentil, F. Desroy, N. Janson, A.-L.	Duhamel, S. Jourde, J. Simon, S.

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Abstract

Since late 1990s the annelid polychaete Melinna palmata and the mollusc bivalve Ensis directus have been collected in the eastern part of the Bay of Seine (English Channel), indicating changes in the benthic communities. Melinna palmata was never collected prior to 2002, whereas it was reported in the muddy fine sands of the western part of the Channel, along the French (e.g. Bay of Cherbourg) and southern UK (e.g. Southampton Waters) coasts. Ensis directus was first reported in 1998 and now appears to be well implanted, given the abundant population collected in 2006. The colonization of Melina palmata seems to be a consequence of recent increase of the fine sediment in the eastern part of the Bay, while that of the invasive Ensis directus seems more likely to be related to its southwest expansion, from the Scheldt estuary (Belgium and Netherlands) towards the Bay. Since both species have complex life cycles including planktonic larval phases, their colonisation may also be favoured either by an accidental introduction via ballast waters or by larval dissemination from neighbouring populations.

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