Passifloraceae sensu stricto in the Atlantic Forest of Rio Grande do Norte state, Brazil: taxonomy and conservation status
Conservation Units, Flora, Passiflora, Phytogeographic Domains.
Passifloraceae s.s has 750 species in 16 genera and pantropical distribution, its species occurs mainly in South and Central America. In Brazil, 166 species are registered in four genera, among which, 90 species are endemic and no genus is endemic. This dissertation is divided into two chapters, presented as independent manuscripts. For this purpose, the taxonomic treatment of Passifloraceae s.s. in the Atlantic Forest that belongs to Rio Grande do Norte’s state was carried out. This study promoted a 100% increase in the sampling effort of the family for the domain, where 12 native species were registered, in a genus, Passiflora L.: Passiflora alata Curtis, P. auriculata Kunth., P. cincinnata Mast., P. edulis Sims, P. foetida L., P. laurifolia L., P. mucronata Lam., P. silvestris Vell., P. suberosa L., P. subrotunda Mast., P. watsoniana Mast. and Passiflora sp. The increase in sampling effort enabled their conservation assessment and analysis of geographical distribution at the Atlantic domain in RN. Among the species, four were classified as “Endangered”, one as “Critically Endangered”, one as “Near Threatened”, two as “Least concern” and four as “Data Deficient”. The Atlantic Forest has the highest richness of Passion fruit's species compared to other domains in Brazil, this study reveals the worrying conservation scenario of Passifloraceae s.s. at Atlantic Forest in RN. Also, these results show the importance of movements that encourage floristics studies, auxiliary taxonomic tools and promotion of actions that aims the flora conservation, in addition to the relevance of monitoring these populations in Atlantic forestry remnants of RN.