phytosociology peruacu

Le résumé fourni par la source

This study investigated how contrasting environments within a karst system—cave skylights and an adjacent riparian forest—influence the structure, diversity, and floristic composition of woody plant communities. Vegetation was analyzed using phytosociological parameters, diameter-class distributions, observed richness, evenness, sample coverage, Bray–Curtis-based PERMANOVA, and neutral models evaluating stochastic community assembly. The riparian forest exhibited greater species richness, basal area, and a higher number of exclusive taxa, whereas skylights supported compositionally distinct communities with lower dominance and a greater concentration of individuals in smaller diameter classes. Floristic composition differed significantly between environments, and neutral-model analyses indicated that these patterns could not be fully explained by stochastic assembly alone. Overall, the results suggest that skylights function as environmentally filtered karst microhabitats, likely acting as localized microrefugia that complement the conservation value of riparian forests in seasonally dry tropical landscapes.

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