Araceae of Grumari restinga: contribution to the conservation of the flora of Rio de Janeiro State, Brazil

Abstract

Th is study surveyed species of the family Araceae in Grumari restinga, located in the metropolitan region of the city of Rio de Janeiro, Brazil. We aimed to: i) eva luate the contribution of a single locality (Grumari restinga) to regional conservation (Rio de Janeiro State) of Araceae; and ii) compare the distribution of species of Araceae among restingas of the state. We calculated the extent of occurrence and the area of occupancy in the entire state for eight species of Araceae found in Grumari,and performed a similarity analysis among restingas. Our data de monstrate that the extent of o ccurrences for Anthurium augustinum, A. coriaceum and A. maricense are infl uenced by Grumari because this area is the boundary of their known distribution in the state. Grumari did not have an infl uence on the distribution of the other studied species. We found Anthurium coriaceum, A. luschnathianum and Philodendron crassinervium to exhibit unusual habits as terrestrial plants in sandy soil. Th e similarity analysis identifi ed six groups of Araceae, four of which are related to the distance from adjacent forests. We demonstrated that this small conservation unit represents a key locality in the preservation of natural populations of species of Araceae in Rio de Janeiro State.

Angiosperm checklist and conservation of one the richest restingas in southeastern Brazil

“…This will shed light on the importance of conservation of the park, and expands the study of threatened species in other areas of the state. A similar scenario has been analyzed in a previous study involving restingas close to large urban centers in Rio de Janeiro state (Calazans et al 2018).…”