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Foraminifera The Journal of Foraminiferal Research Archimer, archive institutionnelle de l’Ifremer July 2007; v. 37; no. 3; p. 204-212 http://www.ifremer.fr/docelec/ http://dx.doi.org/10.2113/gsjfr.37.3.204 © 2007 Cushman Foundation for Foraminiferal Research ailable on the publisher Web site First report of Quinqueloculina Carinatastriata (Wiesner, 1923) (foraminifera) along the french atlantic coast (Marennes-Oléron bay and ile de Ré) Vincent M. P. Bouchet1,2,4, Jean-Pierre Debenay2,3 and Pierre-Guy Sauriau1 1 CRELA (UMR 6217 CNRS-IFREMER-ULR), Place du séminaire, B.P. 5, 17137 L'Houmeau, France 2 BIAF (UPRES EA2644), Université d’Angers, 2 Bd Lavoisier, 49045 Angers Cedex, France 3 IRD, UR 055 Paléotropique, Centre de Nouméa, BP A5, 98848 Nouméa Cedex, New Caledonia blisher-authenticated version is av 4 Correspondence author. E-mail: [email protected] Abstract: Large populations of the living benthic foraminifera Quinqueloculina carinatastriata (Wiesner, 1923) are reported for the first time from intertidal mudflats of the French Atlantic coast (Marennes-Oléron Bay and Ile de Ré). Maximum abundance of living specimens was recorded in early autumn. The species was previously described from the Adriatic and Tyrrhenian Seas (central Mediterranean Sea) and reported from the Eastern Mediterranean and Red Seas, as well as tropical and subtropical regions. A survey of available literature to trace records of the species in muddy shallow habitats along the western coasts of Europe and Africa reveals that the species is unrecorded from the Western Mediterranean Sea and is unknown in the eastern Atlantic Ocean from the Ivory Coast to Denmark, including the British Isles. This supports the hypothesis that the species has been accidentally introduced outside its natural range as a probable result of mariculture trade and/or shipping activities. This is the first report of a successful introduction of a non-indigenous benthic foraminifera to the Atlantic coast of Europe. ccepted for publication following peer review. The definitive pu Please note that this is an author-produced PDF of an article a 1 INTRODUCTION The foraminifera Quinqueloculina carinatastriata (Wiesner, 1923) has been reported primarily in the Adriatic Sea (Wiesner, 1923), and then in the Mediterranean Sea from Eastern Mediterranean to the Tyrrhenian and Adriatic Seas (e.g. Daniels, 1970; Cimerman andLanger,1991; Avar andothers,2001; Debenay andothers,2005; Bernasconi andothers, 2006). The species has also been reported in tropical and subtropical areas such as Xisha Island, China (Zheng, 1979), the Indian River, Florida (Buzas and Severin, 1982) and the Papuan Lagoon, New Guinea (Haig, 1988). Belonging to the difficult group of striate miliolids,the species might have beenincludedinother striate or costate miliolids by some authors, and confusion with similar-looking Q. tasmanica Albani, 1978 is possible. Nevertheless,none of the striate species previously reportedfrom the EuropeanAtlantic coast has characteristics similar enoughtothese species toleadtoanincorrect identification(e.g., Le Campion,1968; Rosset-Moulinier,1972; Redois andDebenay,1996; Debenay andothers, 2001; Cearreta and others, 2002a; Cearreta and others, 2002b; Armynot du Chatelet and others,2005;Ruizandothers,2005;Morvanandothers,2006). The objectives of the present study were twofold: (1) toelucidate the taxonomic status of Quinqueloculina populations recently sampledonintertidal mudflats of the Marennes-Oléron Bay andIle de Ré (FrenchAtlantic coast) and(2) toevaluate the hypothesis that the species has beenaccidentally introducedintothese shelteredbays outside its native range.The latter was evaluatedthrougha literature synopsis totrace records of the species insimilar muddy habitats along the Mediterranean, Western African and Western European coasts. This biogeographic approach was combined with a review of introductionpathways,particularly those that are knowntobe involvedinthe successful transportationof nonindigenous species intotheMarennes-OléronBay. 3 ENVIRONMENTALSETTING The Marennes-OléronBay andIle de Ré are locatedonthe FrenchAtlantic coast northof the Gironde estuary (Fig. 1). The Marennes-Oléron Bay is a semi-enclosed bay with large intertidal areas dominatedby muddy sediments (Sauriauandothers,1989) anddevotedtothe cultivationof the Pacific oyster Crassostrea gigas (Thunberg) (Goulletquer andHéral,1997). The bay is Europe’s largest production area for the Pacific oyster, which was introduced during the 1970’s after the Portuguese oyster C. angulata (Lamark) was decimatedby a viral disease (Grizel,1989).Oyster culture alsoextendtothe northernparts of Ile de Ré,mainly in shelteredhabitatscharacterizedbymuddyandmuddy-sandsediments(Faure,1969). The nearest maJor seaport handling international cargois the Port de La Rochelle-Pallice, whichis locatednorthof the Marennes-OléronBay andeast of the Ile de Ré (Fig.1).From 1993to1995,Masson(2003) classifiedthe ballast of cargovessels arriving inthe port based on the last port of call (i.e.,probable source of ballast waters and/or sediments).Although most of the vessels originatedfrom the northeast Atlantic coasts,a few were from other areas: 7% originated from the Mediterranean and Black Seas and 2% were from subtropical and tropical regions,including the Atlantic andIndian Oceans andthe RedSea (Masson,2003; Masson,communication,2006).Nowadays,the Port de La Rochelle-Pallice is the largest in Europe for the importation of tropical wood from northwest Africa, South America, the Caribbean,Ile de La RéunionandIndonesia.Fertilizers are alsoimportedandcome mainly fromtheArabianPeninsula(SubdivisionPortHydrographieetDragage,2006). MATERIALANDMETHODS The foraminifera samples of this study were collected as part of a benthic survey performed to describe changes in benthic foraminiferal assemblages under the influence of oyster cultures. Thirty-two samples were collected at four intertidal sites in March, June, 4 September andDecember 2004.Sampling sites were locatedat Bellevue (B),Les Traires (LT) andDaire (D) from the Marennes-OléronBay andRivedoux (R) from Ile de Ré (Fig.1).At eachsampling site,samples were takenfrom bothoyster parks (off- andonbottom culture) andoyster-freeareas(control). At the time of sampling,water salinity was measuredat eachstation.Inorder todetermine grainsize distributionat eachsampling site,sediment samples were collectedinMarch2004. Using a pseudoreplicationmethod(Hurlbert,1984), the uppermost layer of the sediment (5 mm)wasscrapedoffandkeptin70%alcoholmixedwithseawaterforforaminiferalstudy. Sediment analyses were conducted using a laser granulometer (Malvern Instruments; grain size from 0800 µm). The weight values of each size were expressed as percentages. The sediments were classified according to their sandmud (mud = silt + clay) ratio (Folk, 1954). In the laboratory, “living” foraminifera were identified following rose Bengal staining (Walton,1952).After drying of the sediment,foraminifera were concentratedby flotationin carbontetrachloride.More than150deadforaminifera and150living (stained) foraminifera were collectedandidentifiedineachsample andthe abundance of eachspecies (number of stainedforaminiferain50cm3ofsediment)wasdetermined. Specimens of Quinqueloculina carinatastriata were collected for detailed taxonomic studies.Scanning electronmicrophotography was performedonliving (stained) specimens of Q. carinatastriata witha FEI Quanta 200F scanning electronmicroscope after samples had beencoatedwithgold. SYSTEMATICPOSITION TheclassificationfollowsLoeblichandTappan(1987) 5 OrderFORAMINIFERIDAEichwald,1830 SuborderMILIOLINADelageandHérouard,1896 FamilyHAUERINIDAESchwager,1876 Genus Quinqueloculinad’Orbigny1826 Quinqueloculina carinatastriata (Wiesner,1923) 1923Adelosina millettiWiesnervar.carinata-striataWiesner inWiesner,p.7677, Pl.14,figs.190,191. 1982Quinqueloculina carinatastriata(Wiesner) inBuzasandSeverin,Pl.2,figs.11 13. 1987 Quinqueloculina poeyana carinataAlbani in Baccaert,Pl.47,figs.4a,4b. 1988 Quinqueloculina carinatastriata(Wiesner) in Haig,Pl.5,figs.910. 1991Adelosina carinata-striata Wiesner in CimermanandLanger,Pl.20,figs.14. 1993Cycloforina (?) carinata(Albani) in Hottinger,HaliczandReiss,Pl.32,figs.1 9. 2005Adelosina carinata striataWiesner inDebenay,MilletandAngelidis,Pl.1,fig. 15. DIAGNOSTIC AND TAXONOMIC REMARKS Description. Specimens collectedfrom boththe Marennes-OléronBay andIle de Ré have chambers arrangedinindistinctly quinqueloculine patterns with35chambers visible from the exterior (Pl.1).About 12costae runobliquely along the chambers andmay unite peripherally. A carina may runlongitudinally onthe last chamber from the necktothe aboral endof the test. The aperture is terminal, generally at the end of a short neck, bordered by a small peristomal rim,witha small tooth,somewhat inflated,hardly bifidat the tip.Great variability occursinornamentation,andinthesizeoftherimandofthecarina. 6 Remarks. Our specimens show some similarities with the Atlantic striate species Quinqueloculina poeyana d’Orbigny,1839.However,the neotype of this species,illustrated by le Calvez (1977),has parallel costae,without a carina,andthe aperture is almostflushwith the surface andis providedwitha bifidtooth.Thus,our specimens cannot be placedintoQ. poeyana. They closely resemble twospecies that are somewhat confusedinthe literature: Q. carinatastriata (Wiesner,1923)andQ. tasmanicaAlbani,1978(TABLE1). The twospecies have commoncharacteristics,mainly longitudinal costae meeting at the periphery where they form a carina,
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