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Bonomo, Sergio; Grelaud, Michaël; Incarbona, Alessandro; Malinverno, Elisa; Placenti, Francesco; Bonanno, Angelo; Di Stefano, Enrico; Patti, Bernardo; Sprovieri, Mario; Genovese, Simona; Rumolo, Paola; Mazzola, Salvatore; Zgozi, Salem; Ziveri, Patrizia (2012): Living coccolithophores from the Gulf of Sirte during the summer of 2008. PANGAEA,, Supplement to: Bonomo, S et al. (2012): Living Coccolithophores from the Gulf of Sirte (Southern Mediterranean Sea) during the summer of 2008. Micropaleontology, 58(6), 487-503

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The Gulf of Sirte is a largely unexplored area in the southernmost Mediterranean Sea. We are presenting here 2008 summer data on the distribution pattern of living coccolithophores, a main phytoplankton calcifying group, in 105 samples from 20 stations.
The survey includes coastal and offshore stations, enabling us to provide indications on the dynamics of phytoplankton productivity in relation to oceanographic processes.
The total coccosphere concentrations show higher values in the offshore stations and lower ones for coastal sites. Umbellosphaera tenuis, Emiliania huxleyi, Florisphaera profunda, Syracosphaera pulchra HOL (Calyptrosphaera oblonga) and Rhabdosphaera spp. dominate the assemblages. The coccolithophore community shows the typical vertical zonation, with K-strategist taxa (among others U. tenuis, Rhabdosphaera spp. and Discosphaera tubifera) in the upper 75 meters depth and Lower Photic Zone taxa, dominated by F. profunda, below. The latter species shows its maximum development in the Deep Chlorophyll Maximum layer, which occurs in the upper part of the Levantine Intermediate Water, where the nutrient content is higher than in the overlying layers.
The mesoscale oceanographic circulation significantly affects the spatial and vertical distribution of coccolithophores, with the thermocline and halocline depth shaping the vertical zonation of coccolithophore taxa and resulting in a strong lateral gradient within the gulf: in the eastern sector, under the influence of the Gulf of Sirte anticyclone, the DCM is deeper and so is the occurrence of K-strategist taxa and F. profunda.
Seventh Framework Programme (FP7), grant/award no. 265103: Mediterranean Sea Acidification in a Changing Climate
Median Latitude: 31.662000 * Median Longitude: 17.625000 * South-bound Latitude: 30.370000 * West-bound Longitude: 14.860000 * North-bound Latitude: 32.690000 * East-bound Longitude: 20.010000
Date/Time Start: 2008-07-17T00:00:00 * Date/Time End: 2008-07-27T00:00:00
Minimum DEPTH, water: m * Maximum DEPTH, water: 200 m
MedSudMed_08_2718 * Latitude: 32.530000 * Longitude: 14.860000 * Date/Time: 2008-07-17T00:00:00 * Elevation: -107.0 m * Location: Mediterranean Sea * Campaign: MedSudMed_08 * Basis: Urania * Method/Device: Bottle, Niskin (NIS)
MedSudMed_08_3013 * Latitude: 32.690000 * Longitude: 15.840000 * Date/Time: 2008-07-18T00:00:00 * Elevation: -1021.0 m * Location: Mediterranean Sea * Campaign: MedSudMed_08 * Basis: Urania * Method/Device: Bottle, Niskin (NIS)
MedSudMed_08_3022 * Latitude: 32.170000 * Longitude: 15.460000 * Date/Time: 2008-07-18T00:00:00 * Elevation: -32.0 m * Location: Mediterranean Sea * Campaign: MedSudMed_08 * Basis: Urania * Method/Device: Bottle, Niskin (NIS)
MedSudMed "Assessment and Monitoring of the Fishery Resources and the Ecosystems in the Straits of Sicily" (
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, waterDepth watermGeocode
6Temperature, waterTemp°CBonomo, Sergio
7SalinitySalBonomo, Sergio
8Fluorescence, chlorophyllF chlµg/lBonomo, Sergio
9OxygenO2µmol/lBonomo, Sergio
10Algirosphaera robustaA. robusta#/lBonomo, Sergio
11Braarudosphaera bigelowiiB. bigelowii#/lBonomo, Sergio
12Calcidiscus leptoporusC. leptoporus#/lBonomo, Sergio
13Calciopappus spp.Calciopappus spp.#/lBonomo, Sergio
14Calciosolenia spp.Calciosolenia spp.#/lBonomo, Sergio
15Ceratolithus cristatusC. cristatus#/lBonomo, Sergio
16Coronosphaera spp.Coronosphaera spp.#/lBonomo, Sergio
17Cricosphaera spp.Cricosphaera spp.#/lBonomo, Sergio
18Discosphaera tubiferD. tubifer#/lBonomo, Sergio
19Emiliania huxleyiE. huxleyi#/lBonomo, Sergio
20Florisphaera profundaF. profunda#/lBonomo, Sergio
21Gephyrocapsa oceanicaG. oceanica#/lBonomo, Sergio
22Gephyrocapsa spp.Gephyrocapsa spp.#/lBonomo, Sergio
23Gladiolithus flabellatusG. flabellatus#/lBonomo, Sergio
24Helicosphaera carteriH. carteri#/lBonomo, Sergio
25Helicosphaera spp.Helicosphaera spp.#/lBonomo, Sergio
26HolococcolithsHolococcoliths#/lBonomo, Sergio
27Oolithotus fragilisO. fragilis#/lBonomo, Sergio
28Picarola margalefiP. margalefi#/lBonomo, Sergio
29Pontosphaera spp.Pontosphaera spp.#/lBonomo, Sergio
30Rhabdosphaera spp.Rhabdosphaera spp.#/lBonomo, Sergio
31Scyphosphaera spp.Scyphosphaera spp.#/lBonomo, Sergio
32Syracosphaera spp.Syracosphaera spp.#/lBonomo, Sergio
33Placoliths, smallPlacoliths small#/lBonomo, Sergio
34Umbellosphaera tenuisU. tenuis#/lBonomo, Sergio
35Umbilicosphaera spp.Umbilicosphaera spp.#/lBonomo, Sergio
36Thoracosphaera heimiiT. heimii#/lBonomo, Sergio
37Coccoliths, upper photic zone taxaUPZ taxa#/lBonomo, Sergio
38Coccoliths, lower photic zone taxaLPZ taxa#/lBonomo, Sergio
39MiscellaneousMiscellaneous#/lBonomo, Sergio
40PlacolithsPlacoliths#/lBonomo, SergioPlacoliths bearing taxa
41CoccolithsCocco#/lBonomo, SergioTotal Coccoliths cell
3744 data points

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