Podrobnosti záznamu

Název
    Isotope reconstruction of plant palaeoecology. Case study of Cenomanian floras from Bohemia
Údaj o odpovědnosti
    Nguyen Tu, Jiří Kvaček, David Uličný, Hervé Bocherens, André Mariotti, Jean Broutin
Autor
    Bocherens, Hervé
    Broutin, Jean
    Kvaček, Jiří, 1937-
    Mariotti, André
    Nguyen Tu, Thanh Thuy
    Uličný, David
Jazyk
    anglicky
Zdrojový dokument - seriál
    Palaeogeography, palaeoclimatology, palaeoecology
Svazek/č.
    Vol. 183, no. 1-2
Strany
    p. 43-70
Rok
    2002
Poznámky
    9 obr., 2 fot., 2 tab., 4 s.bibl.
    il.
    Zkr. název ser.: Palaeogeogr. Palaeoclimatol. Palaeoecol.
Předmětová skupina
    Angiospermophyta
    biochemie
    cenoman
    Coniferales
    česká křídová pánev
    Ginkgophyta
    izotopy C
    izotopy stabilní
    křída-svrchní
    listy
    paleoekologie
    paleogeografie
    prostředí fluviální
    Pteridophyta
    salinita
    uhlík
Geografické jméno
    Brník (Kolín)
    ČR-Čechy
    Horoušany (Praha-východ)
    Pecínov (Rakovník)
    Praha-Hloubětín
Klíčové slovo
    Bohemia
    Case
    Cenomanian
    Floras
    Isotope
    Palaeoecology
    Plant
    Reconstruction
    Study
Abstrakt (anglicky)
   Palaeoenvironments inferred from stable carbon isotope ratios of fossil plants collected from various environments of the Cenomanian of Bohemia were compared with palaeobotanical and sedimentological data to test the use of isotope ratios as a record of local palaeoenvironments and fossil-plant ecology. A number of isotope and biogeochemical patterns suggested that stable carbon isotope rations in the Cenomanian plants from Bohemia have not been significantly affected by diagenesis. Stable carbon isotope rations of the palaeoflora from one of the sections studies were used as a reference for a non-stressed habitat since both sedimentological and palaeobotanical evidence suggested that the fossil flora underwent no environmental stresses that could have influenced its "delta"13C values. Comparisons of "delta"13C values of the other palaeofloras with that of the reference section, allowed inference of the palaeoenvironmental stresses undergone by fossil plants.
   These palaeoenvironmental patterns deduced from 13C/12C ratios are in agreement with the palaeoenvironments previously reconstructed by sedimentological and palaeobotanical studies. Combining evidence from those studies with isotope data provided detailed insights into the palaeoecology of the plants studied. Finally, stable carbon isotope ratios allowed precise characterisation of the ecology of the best-represented species of the deposits studied, the ginkgoalean plant Eretmophyllum obtusum and the conifer frenelopsis alata, which were quite common in the salt-marsch environments in Europe during the Cenomanian. Hence, stable carbon isotope ratios can help in evaluating the enviromental stresses undergone by fossil plants and the combination of these results with palaeobotanical and sedimentological data can provide detailed insights into fossil-plant ecology
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    25. 3. 2008
Datum importu
    8. 8. 2012