European Jurassic floras: statistics and palaeoenvironmental proxies

Author:

Barbacka Maria12,Bodor Emese34,Jarzynka Agata5,Kustatscher Evelyn6,Pacyna Grzegorz7,Popa Mihai E.8,Scanu Giovanni G.9,Thévenard Frédéric10,Ziaja Jadwiga5

Affiliation:

1. 1Hungarian Natural History Museum, Botanical Department, H-1476 Budapest, P.O. Box 222, Hungary

2. 2W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Kraków, Poland

3. 3Hungarian Geological and Geophysical Institute, Geological and Geophysical Collections, 1143 Budapest, Stefánia út 14, Hungary

4. 4Eötvös Loránd University, Department of Palaeontology, 1117 Budapest, Pázmány Péter sétány 1/C, Hungary

5. 5W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Kraków, Poland;

6. 6Naturmuseum Südtirol, Bindergasse 1, 39100 Bolzano/Bozen, Italy 6 Department für Geo- und Umweltwissenschaften, Paläontologie und Geobiologie, Ludwig-Maximilians- Universität und Bayerische Staatssammlung für Paläontologie und Geobiologie, Richard-Wagner-Straße 10, 80333 München, Germany

7. 7Department of Palaeobotany and Palaeoherbarium, Institute of Botany, Jagiellonian University, ul. Lubicz 46, 31-512 Kraków, Poland

8. 8University of Bucharest, Faculty of Geology and Geophysics, Laboratory of Palaeontology, 1, N. Balcescu Ave., 010041, Bucharest, Romania;

9. 9Department of Chemical and Geological Sciences, University of Cagliari, via Trentino 51, I-09127 Cagliari, Italy

10. 10UMR5276 CNRS, Laboratoire de Géologie de Lyon, Terre, Plančtes et Environnement, Université Claude Bernard Lyon 1, 69622 Villeurbanne cedex, France

Abstract

Abstract The Jurassic floras of Europe show considerable diversity. To examine the extent of this diversity and its possible causes we used multivariate statistical methods (cluster analysis, PCA, NMDS) to compare all significant Jurassic floras in Europe. Data were based on 770 taxa from 46 fossiliferous occurrences (25 units) from France, Germany, Greenland, Hungary, Italy, Norway, Poland, Romania, Scotland, Serbia, Sweden, Switzerland, and the United Kingdom. Statistical analyses were applied at species level and genus level, and also performed for the major plant groups. The genus cladograms show affinities between different localities based on environmental factors, while the cladograms based on species affinities indicate only taxonomical correlations. The study shows that locality age does not seem to be of paramount importance for floral composition.

Publisher

W. Szafer Institute of Botany Polish Academy of Sciences

Subject

General Earth and Planetary Sciences,General Agricultural and Biological Sciences

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