Resumo

BARRIOS, Sergio Rafael Cárdenas  e  PEREZ-MOLAS, Lidia. Floristic composition of the forest and savanna formation in the Cerrado Aguará Ñu, Mbaracayú Forest Natural Reserve, Paraguay. Rev. Soc. cient. Parag. [online]. 2021, vol.26, n.2, pp.77-99. ISSN 2617-4731.  https://doi.org/10.32480/rscp.2021.26.2.77.

The aim of this study was to carry out a rapid ecological assessment of the forest and savannah´s native flora in the Cerrado Aguará Ñu of the Mbaracayú Forest Natural Reserve in Paraguay, to determine the species richness and the differences in composition among them, and to complement existing floristic surveys. The native vascular flora of the Cerrado was recorded in situ in ten 50 m x 2 m (1000 m2) transects within each plant community (forest and savannah). A total of 171 species in 61 families were recorded. The savannah showed the higher species richness in relation to the forest, with 106 species in 40 families and 81 species in 40 families, respectively. The most frequent species in the savannah were Axonopus cfr. siccus (Nees) Kuhlm., Butia paraguayensis (Barb. Rodr.) L.H. Bailey, Duguetia furfuracea (A. St.-Hil.) Benth. & Hook. f., Campomanesia adamantium (Cambess.) O. Berg, and Pradosia brevipes (Pierre) T.D. Penn. As for the forest, the most frequent species were Copaifera langsdorffii Desf. var. langsdorfii, Didymopanax morototoni (Aubl.) Decne. & Planch., Protium heptaphyllum (Aubl.) Marchand, and Vochysia tucanorum C. Mart. Only 14 plant species were found to be common in both plant communities. The Fabaceae family had the highest number of species. On the other hand, the typical floristic dissimilarity was evidenced between the Cerrado forest and savannah in the study area, which suggests a good state of conservation of the protected area. However, given the traits and constraints of the rapid ecological assessment, we recommend to continue monitoring the area in order to advance towards a better understanding of the local vegetation dynamics and a better valuation of its biodiversity.

Palavras-chave : rapid ecological assessment; native plants; species richness; protected area.

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