Contribution to the Knowledge of Rocky Plant Communities of the Southwest Iberian Peninsula

Plants (Basel). 2021 Aug 2;10(8):1590. doi: 10.3390/plants10081590.


The rocky habitats of southern Portugal are ecosystems with extreme xericity conditions, associated with special abiotic strains. In these unstable ecological conditions, a considerable diversity of plant communities occurs. The objective of this study, carried out in the Algarve and Monchique, and the Mariánica Range biogeographical sectors, is to compare chasmo-chomophytic communities of the southwestern Iberian Peninsula, using a phytosociological approach (Braun-Blanquet methodology) and numerical analysis (hierarchical cluster analysis). From these results, two new communities were identified, Sanguisorbo rupicolae-Dianthetum crassipedis and Antirrhinetum onubensis, as a result of floristic and biogeographical differences from other associations already described within the alliances Rumici indurati-Dianthion lusitani and Calendulo lusitanicae-Antirrhinion linkiani, both included in the Phagnalo saxatilis-Rumicetea indurate class.

Keywords: Antirrhinum onubensis; Dianthus crassipes; Phagnalo saxatilis-Rumicetea indurate class; numerical analysis; phytosociology; southern Portugal.