• the role of rock mining for maintaining dauco carotae-crepidetum rhoeadifoliae hejný et grüll in hejný et al. 1979 — a new to poland plant association

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     this work presents the dauco carotae-crepidetum rhoeadifoliae plant association, which is new to poland. the association has been observed in industrial reclamation areas in the vicinity of carbonate mineral excavation sites in the central part of the opole region. in the vast majority of cases, plots of this association developed in reclaimed areas. the majority of diagnostic species for the association was found within surveyed plots, including verbascum thapsus, v. densiflorum andbryum argenteum. taxa characteristic of the alliance were also constantly present, i.e. daucus carota, melilotus alba, m. officinalis, echium vulgare and erysimum hieracifolium. this association belongs to the rarest syntaxa in poland included in the dauco-melilotion alliance of ruderal communities with a predominance of hemicryptophytes, therophytes and perennials. the main diagnostic species — crepis rhoeadifolia, belongs to very rare elements of polish flora. it has been observed only in the southern part of the country in approx. 20 sites. crepis rhoeadifolia had not been observed in silesia for approx. 40 years, which is why it was considered to be an extinct taxon in this region. rediscovering of the species allowed for diagnosing the dauco-crepidetum rhoeadifoliae association. this association is an example of a pioneer phytocenosis of, most likely, anthropogenic origin in silesia.

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