Most studies of bryophytes in Brazil have focused on the Atlantic and Amazon forests, leaving the Caatinga as the biome least bryologically studied in the country. A bryofloristic survey of Serra da Capivara National Park was undertaken to analyze species richness, the distribution of species among Brazilian biomes, and the geographic distribution of species. A total of 450 samples of 62 species were collected, representing 48 mosses, 13 hepatics, and one hornwort. The resulting species list includes 22 new records for the Caatinga, 34 new records for the state of Piauí, and two for the Northeast Region of Brazil. About 60% (37 spp.) of the species have broad distributions in Brazil while 13 have moderate distributions and 12 are considered restricted. The results reinforce the importance of floristic inventories in Brazil and the maintenance of Parque Nacional da Serra da Capivara as an area for the conservation of bryophytes.
Sete Cidades National Park is located in northeastern Piauí State, Brazil, and comprises several vegetation types characteristic of the Brazilian Cerrado. This study contributes to understanding the composition and distribution of Brazilian bryoflora and provides a list of bryophytes of Sete Cidades National Park. A total of 520 samples representing 90 species were collected, of which 53 represent new occurrences for Piauí, 25 for the Cerrado and four for the Northeast Region of Brazil. About 55% of the species have broad distributions in the country. This study highlights the relevance of Sete Cidades National Park for the conservation of species and the importance of continued bryofloristic studies in Piauí.
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