0000000000331639
AUTHOR
Pd Henne
Quali formazioni boschive in un clima più caldo?
La plurimillenaria azione dell'uomo sugli ecosistemi sudalpini, e mediterranei in particolare, ha fortemente alterato i consorzi vegetali e spesso cancellato le specie arboree che in natura dominerebbero nelle attuali condizioni ambientali. Tale lacuna rende molto difficile pronosticare quali specie sarebbero le meglio adattate a eventuali futuri cambiamenti climatici.
Holocene vegetation and fire dynamics in the supra-mediterranean belt of the Nebrodi Mountains (Sicily, Italy).
High-resolution pollen, macrofossil and charcoal data, combined with accelerator mass spectrometry 14C dating and multivariate analysis, were used to reconstruct Holocene vegetation and fire dynamics at Urio Quattrocchi, a small lake in the supra-mediterranean belt in the Nebrodi Mountains of Sicily (Italy). The data suggest that after 10 000 cal a BP increasing moisture availability supported closed forests with deciduous (Quercus cerris, Fagus sylvatica and Fraxinus spp.) and evergreen (Quercus ilex) species. Species-rich closed forest persisted until 6850 cal a BP, when Neolithic activities caused a forest decline and affected plant diversity. Secondary forest with abundant Ilex aquifoli…