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001-es BibID:BIBFORM081913
Első szerző:Barbacka Mária
Cím:A quantitative approach for identifying plant ecogroups in the Romanian Early Jurassic terrestrial vegetation / Mária Barbacka, Mihai Emilian Popa, Józef Mitka, Emese Bodor, Zoltán Püspöki, Richard William McIntosh
Megjegyzések:Community level ecology is considered to support significantly the recognition of the ecological status of planttaxa and the identification of plant ecogroups, thus it generally provides extended data sets on the spatial andtemporal changes of ecological factors. Since research based exclusively on plant structure and their supposedadaptation to the environment is now considered inadequate, statistical methods can be used. Assuming thatco-occurrence of plant fossils on a single hand specimen in the case of autochthonous or parautochthonousflorasis the result of their growth in the same phytocenosis, quantitative ecological analysis on Mesozoic materialswould yield significant insights. In this paper, statistical and multivariate quantitative analyses of Early Jurassicplant fossil records from the Steierdorf Formation in Anina (South Carpathians, Romania) are presented. Fourpalaeoecological groups of taxa were distinguished by principal component analysis (PCA) and interpreted asplant assemblages of various palaeobiotopes associated with the sedimentary facies of the enclosing formation.A group of samples was analysed using the principal coordinate (PCO) method and the statistical significance(p{less than or equal to} 0.05) (p<=0.05) of individual binary responses of taxa along thefirst two PCO ordinationaxes was tested by general linear model (GLM). They revealed putative palaeoecological gradients: axis 1?disturbance caused by water levelfluctuations, axis 2-temperature, corresponding with the already assumedenvironmental and climatic change at the Hettangian/Sinemurian boundary. Multivariate analyses enabled theidentification of palaeoecological groups and thus inferring palaeogeographical conditions based on Mesozoicmaterials.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
Plant ecogroups
Principle component analysis
Multivariate analysis
Megjelenés:Palaeogeography Palaeoclimatology Palaeoecology. - 446 (2016), p. 44-54. -
További szerzők:Popa, Mihai Emilian Mitka, Józef Bodor Emese (Budapest) Püspöki Zoltán (1972-) (geológus) McIntosh, Richard William (1978-) (geológus)
Pályázati támogatás:OTKA 100658
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