Sinopse de Licófitas e Samambaias do Parque Nacional da Amazônia, Pará, Brasil

Abstract

Resumo Neste trabalho é apresentado um levantamento das samambaias e licófitas do Parque Nacional da Amazônia, Pará, Brasil. Este é um dos maiores Parques da bacia amazônica e agrega os principais tipos vegetacionais das terras baixas da Amazônia. Coletas foram realizadas entre 2015 e 2016, e os espécimes estão depositados no herbário INPA, UPCB e HSTM. Registrou-se 83 espécies, das quais uma é um novo registro para o Pará (Selaginella cabrerensis). As famílias com maior riqueza de espécies são Pteridaceae (19 spp.), Polypodiaceae (12 spp.), Hymenophyllaceae (8 spp.), Selaginellaceae (6 spp.) e Aspleniaceae (5 spp). Dentre os gêneros, Adiantum apresenta maior riqueza, com 13 espécies, seguido por Microgramma e Selaginella (6 spp., cada), e Asplenium e Trichomanes (5 spp., cada). A maioria das espécies é terrícola, em ambientes de terra-firme. Neste trabalho apresentamos chaves de identificação para famílias, gêneros e espécies, lista de material examinado, comentários e ilustrações.

Lycophytes and ferns of an Amazonian-Cerrado ecotone in Maranhão State, Northeastern Brazil: identification key and annotated list of taxa.

“…The most representative family was Pteridaceae with 17 species, which was also reported in two other studies carried out in Maranhão, one in areas of the Amazonian Forest (Silva Junior et al 2020) and another in areas of Cerrado (Fernandes et al 2022). The family Pteridaceae is one of the most diverse in Brazil and their genera have wide geographic distribution, because of it, it has been reported as one of the commonest in studies of ferns in Brazil (e.g., Maciel & Pietrobom 2010;Winter et al 2011;Miranda et al 2015;Menezes & Labiak 2020;Silva Junior et al 2020;Fernandes et al 2022;Flora and Funga of Brazil 2023).…”

Floristic similarity of lycophytes and ferns in the Amazonia/Cerrado transition zone in the central region of northern Maranhão state, Brazil

“…that was observed only in areas further inland and is mainly associated with swamps. Pteridaceae and Polypodiaceae commonly stand out as the most diverse families in studies carried out in the Amazonia and Cerrado biomes in other Brazilian states [23,30,32] and Maranhão [4,5]. These families have wide geographic distributions in Brazil, individuals that occupy different habitats, and are highly morphologically variable [3].…”

“…Subgroup E has two studies that were carried out in large areas with vegetation typical of the Amazonia. This subgroup formed because a study by Oliveira et al (2021) [31] included a large area of the Tapajós River Basin, which contains Amazon National Park, as well as the study area of Menezes and Labiak (2020) [30]. These study areas mainly have Campinaranas, upland forests, partially flooded forests (such as floodplains and igapós), and secondary forests, which are suitable environments for ferns and lycophytes.…”