Data Description

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Thunell, RC (1978): Distribution of planktonic foraminifera in surface sediments of the Mediterranean Sea. doi:10.1594/PANGAEA.55624,
Supplement to: Thunell, Robert C (1978): Distribution of recent planktonic foraminifera in surface sediments of the Mediterranean Sea. Marine Micropaleontology, 3(2), 147-173, doi:10.1016/0377-8398(78)90003-8
The Mediterranean Sea is a partillay isolated ocean where excess evaporation over precipitation results in large east to west gradients in temperature and salinity. Recent planktonic foraminiferal distributions have been examined in 66 surface sediment samples from the Mediterranean Sea. In addition to mapping the frequency distribution of 16 species, the faunal data has been subjected to cluster analysis, factor analysis and species diversity analysis. The clustering of species yields assemblages that are clearly temperature related. A warm assemblage contains both tropical and subtropical elements, while the cool assemblage can be subdivided into cool-subtropical, transitional and polar-subpolar groupings. Factor analysis is used to delineate the geographic distribution of four faunal assemblages. Factor 1 is a tropical-subtropical assemblage dominated by Globigerinoiden ruber. It has its highest values in the warmer eastern basin. Transitional species (Globorotalia inflata and Globigerina bulloides) dominate factor 2 with highest values occurring in the cooler western basin. Factor 3 reflects the distribution of Neogloboquadrina dutertrei and is considered to be salinity dependent. Subpolar species dominate factor 4 (Neoglobuquadrina pachyderma and G. bulloides), with highest values occurring in the northern part of the western basin where cold bottom water is presently being formed. The Shannon-Weiner index of species diversity shows that high diversity exists over much of the western basin and immediately east of the Strait of Sicily. This region is marked by equitable environmental conditions and relatively even distribution of individuals among the species. Conversely, in areas where temperature and salinity values are more extreme, diversity values are lower and the assemblages are dominated by one or two species.
Median Latitude: 37.248242 * Median Longitude: 17.249056 * South-bound Latitude: 31.820000 * West-bound Longitude: -4.250000 * North-bound Latitude: 41.967000 * East-bound Longitude: 35.050000
Date/Time Start: 1956-07-01T00:00:00 * Date/Time End: 1965-08-06T00:00:00
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 0.0 m
ATL4647 * * Latitude: 37.150000 * Longitude: 23.630000 * Elevation: -366.0 m * Campaign: CLIVAMPcruises * * Basis: Ship of opportunity * * Device: Piston corer (PC) * * Comment: top Pcore/ATL4647
ATL4648 * * Latitude: 38.930000 * Longitude: 24.300000 * Elevation: -338.0 m * Campaign: CLIVAMPcruises * * Basis: Ship of opportunity * * Device: Piston corer (PC) * * Comment: top Pcore/ATL4648
ATL4650 * * Latitude: 40.230000 * Longitude: 24.700000 * Elevation: -859.0 m * Campaign: CLIVAMPcruises * * Basis: Ship of opportunity * * Device: Piston corer (PC) * * Comment: top Pcore/ATL4650
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event label *Event
2Latitude of event *Latitude
3Longitude of event *Longitude
4Elevation of event *Elevationm
5DEPTH, sediment/rock *Depthm
6Globorotalia inflata *G. inflata%Thunell, Robert C *Counting >250 µm fraction *
7Globorotalia truncatulinoides *G. truncatulinoides%Thunell, Robert C *Counting >250 µm fraction *
8Globorotalia truncatulinoides sinistral *G. truncatulinoides s%Thunell, Robert C *Counting >250 µm fraction *
9Globorotalia scitula *G. scitula%Thunell, Robert C *Counting >250 µm fraction *
10Globigerinoides ruber *G. ruber%Thunell, Robert C *Counting >250 µm fraction *
11Globigerinoides sacculifer *G. sacculifer%Thunell, Robert C *Counting >250 µm fraction *
12Globigerinoides conglobatus *G. conglobatus%Thunell, Robert C *Counting >250 µm fraction *
13Globoturborotalita tenella *G. tenella%Thunell, Robert C *Counting >250 µm fraction *
14Globigerina bulloides *G. bulloides%Thunell, Robert C *Counting >250 µm fraction *
15Globigerina calida *G. calida%Thunell, Robert C *Counting >250 µm fraction *
16Globigerina falconensis *G. falconensis%Thunell, Robert C *Counting >250 µm fraction *
17Neogloboquadrina pachyderma dextral *N. pachyderma d%Thunell, Robert C *Counting >250 µm fraction *
18Neogloboquadrina pachyderma sinistral *N. pachyderma s%Thunell, Robert C *Counting >250 µm fraction *
19Neogloboquadrina sp. *Neogloboquadrina sp.%Thunell, Robert C *Counting >250 µm fraction *
20Turborotalita quinqueloba *T. quinqueloba%Thunell, Robert C *Counting >250 µm fraction *
21Globoturborotalita rubescens *G. rubescens%Thunell, Robert C *Counting >250 µm fraction *
22Globigerina digitata *G. digitata%Thunell, Robert C *Counting >250 µm fraction *
23Globigerinita glutinata *G. glutinata%Thunell, Robert C *Counting >250 µm fraction *
24Globigerinella aequilateralis *G. aequilateralis%Thunell, Robert C *Counting >250 µm fraction *
25Hastigerina pelagica *H. pelagica%Thunell, Robert C *Counting >250 µm fraction *
26Neogloboquadrina dutertrei *N. dutertrei%Thunell, Robert C *Counting >250 µm fraction *
27Orbulina universa *O. universa%Thunell, Robert C *Counting >250 µm fraction *
28Sprudts, warm water species *SPRUDTS%Thunell, Robert C *Counting >250 µm fraction *
1518 data points

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