**6. Final considerations**

The literature review and the data compilation resulted in an important database to understand how the Atlantic Forest is being studied in terms of forest structure and tree diversity. The most abundant tree species of this compilation probably corroborate with those found in studies on the Atlantic Forest further South in Brazil (including the state of Santa Catarina), and in Southeastern Brazil (*e.g.* São Paulo state formations). However, studies analyzing these relationships are needed.

Although many formations are relatively well studied in this respect, some formations such as the alluvial forests, mainly in the Dense Rainforest domain, are understudied. The same situation can be observed for the entire Semideciduous Seasonal Forest. Even more interesting is the lack of phytosociological data about this forest type in the Southwestern region of the state of Paraná. Therefore, future research is needed to build up a database for other and more specific studies. Knowing the species that share (or should share) the environment with ourselves is crucial to those who want to observe the habitat, interpret it and to promote conservation, preservation and true sustainable development.
