Record details

    Evolution of intraspecific morphological variability and its relationship to environment (Caliapora battersbyi, Devonian)
Statement of responsibility
    Jindřich Hladil
    Hladil, Jindřich, 1953-
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
    Vol. 73, no. 1
    p. 61-74
    8 obr., 1 fot., 1 tab., 2 s.bibl.
    České resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    evoluce biologická
    moravskoslezské prevariské paleozoikum
    morfologie funkční
Geographical name
Abstract (in english)
   Quantitative evaluation of morphology including parameters of environment provided these results: Morphological variability of the species decreased slowly but continuosly, beginning from the stage of its intial biotic radiation. Episodes of increased variability corresponded to agitated water and strokes of sedimentary clasts. Local maxima of variability are also correlated with the longevity of longevity of coral colonies. Surprisingly, the changes of morphological variability are almost independent of the changes of diversity of accompanying corallomorph fauna and flora. Variability displayed negative correlation with direct biological attack during the initial 3/5 of the Givetian history of the species. Then a change arose and during the remainning times untill the end of the Givetian, the variability displayed a negative correlation with the direct biological atack. The weakly positive correlation of variability with the density of the populations has been documented.
   Similar but not identical complexes of morphological features in conjunction with a specific decrease/increase in variability were found during several ecological crises during the Middle and Late Givetian (a primary control by marine regressions on carbonate platforms). To conclude, the study about C. battersbyi indicates that the intraspecific morphological variability of tabulate corals is not only dominantly controlled by energy of waves and quality of the sedimentary substrate, as it would correspond to state-of-art of the discipline before this study. The morphological variability reflects distinctively also the ecological and evolutionary situations
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    18. 2. 2008
Import date
    8. 8. 2012