ABSTRACT
This study aims to describe the diversity and the arboreal community classification of the Ombrophylous Moist Forest located at FLONA in São Francisco de Paula, RS, using floristic and hierarchical analysis data through the TWINSPAN (Two-way Indicator Species Analysis) program. It had been used ten portions of 1 hectare each one and it had been distributed at FLONA’s area in a randomnly way. In each 1 hectare conglomerate all individuals with DAP ≥ 30 had been measured. The encountered species diversity is within the limits that had been described for Ombrophylous Moist Forest in the South of Brazil, with estimates varying from 75 to 110 arboreal species. The TWINSPAN method had determined three great floristic groups: Group 1 - Araucaria association, showing Araucaria angustifolia (Betol.) Kuntze as the indicative species; Group 2 - Sebastiania association, presenting as indicative species Sebastiania commersoniania (Baill.) L. B. Sm. et Downs, Sebastiania brasiliensis Spreng. and Cryptocarya aschersoniana Mez and Group 3 - Podocarpus association, presenting as indicative species Podocarpus lambertii former Klotzsch Endl.
Keywords:
Classification; floristic groups; hierarchical analysis