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

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

Ricardo Quinto Canas  1   2 , Ana Cano-Ortiz  3 , Giovanni Spampinato  4 , Sara Del Río  5 , Mauro Raposo  6 , José Carlos Piñar Fuentes  3 , Carlos Pinto Gomes  6
Affiliations

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

Ricardo Quinto Canas et al. Plants (Basel). .

Abstract

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.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Biogeographical map of the southwest of the Iberian Peninsula at sector level, following Rivas-Martínez et al. [19].
Figure 2
Figure 2
Classification analysis (UPGMA clustering dendrogram (with Bray–Curtis distance) on chasmo-chomophytic associations from the Southwestern Iberian Peninsula (included in both Rumici indurati-Dianthion lusitani and Calendulo lusitanicae-Antirrhinion linkiani alliances): 1—Silene acutifoliae-Dianthetum lusitani (32–40); 2—Sileno montistellensis-Dianthetum lusitani (41–44); 3—Digitali thapsi-Dianthetum lusitani (22–31); 4—Antirrhinetum onubensis (9–16); 5—Sileno longiciliae-Antirrhinetum linkiani (52–64); 6—Sanguisorbo rupicolae-Dianthetum crassipedis (1–8); 7—Phagnalo saxatilis-Rumicetum indurati (17–21); 8—Phagnalo saxatilis-Dianthetum barbati (45–51).
Figure 3
Figure 3
Sanguisorbo rupicolae-Dianthetum crassipedis on rocky cliff fissures in the lower Guadiana basin (Ribeira da Foupanilha, near Vaqueiros—Alcoutim), included in the southwestern part of the Mariánica Range Sector.
Figure 4
Figure 4
Antirrhinetum onubensis on rocky fissures of limestones in the Algarve and Monchique Sector—Barrocal algarvio (left: Varejota, Parragil—Loulé; right: Cerro da Cabeça, Moncarapacho—Olhão).
See this image and copyright information in PMC

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