Plot (a) and species (b) ordination from plots in remnants of Atlantic forest (n = 20) and restinga (n = 20) and their correlation with nine abiotic variables [aluminium (Al), calcium (Ca), canopy cover, clay (%), flooding (Flo), ground level diameter (DGL), index SMP (SMP), phosphorus (P), sand (%)]. The axes show the percentage of variation explained by the constraining variables. The nine variables showed significant correlation with data variance (p ≤ 0.05) according to the Monte Carlo permutation test, but just those in red were not redundant [VIF (variance inflation factor) < 4]. Sampled species were: A. pen: Adiantum pentadactylon; A. phy: Anemia phyllitidis; A. ser: Asplenium serra; C. pha: Cyathea phalerata; D. pen: Doryopteris pentagona; L. eff: Lastreopsis effusa; N. bra: Neoblechnum brasiliense; P. lep: Pleopeltis lepidopteris; P. cyl: Polybotrya cylindrica; P. ara: Pteridium arachnoideum; P. den: Pteris denticulata; R. adi: Rumohra adiantiformis; S. lat: Serpocaulon latipes; T. ser: Telmatoblechnum serrulatum.