An inventory of the ferns and lycophytes of the Lower Tapajós River Basin in the Brazilian Amazon reveals collecting biases, sampling gaps, and previously undocumented diversity

Oliveira, Marise Helen Vale de; Torke, Benjamin M.; Almeida, Thaís Elias

doi:10.1007/s12228-021-09668-7

Cited by 4 publications

(2 citation statements)

References 63 publications

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“…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.…”

Section: Resultsmentioning

confidence: 99%

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

Junior¹,

Prado

Ferreira

et al. 2023

Sci. Plena

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Floristic similarity studies make it possible to compare species richness between different phytophysiognomies and to assess whether species are typical of a phytophysiognomies or if they are common to two or more phytophysiognomies. The Immediate Geographic Region of São Luís (IGR), in the central region of northern Maranhão, is characterized by the presence of Amazonia, Cerrado, and coastal vegetation phytophysiognomies. The objectives of this work were to verify if the fern and lycophyte species in the IGR are similar to those in another Amazonia and Cerrado phytophysiognomies in Maranhão and Brazil. Sixty-three species of lycophytes and ferns were identified, with a predominance of individuals in the families Pteridaceae and Polypodiaceae. A similarity analysis indicated the study area has a greater affinity with the Amazonia. This is the first floristic similarity study that emphasizes ferns and lycophytes in Maranhão. However, the scarcity of floristic surveys in Maranhão and other ecotonal areas in Brazil hindered a more complex analysis of the floristic similarity of these phytophysiognomies.

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Section: Resultsmentioning

confidence: 99%

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

Junior¹,

Prado

Ferreira

et al. 2023

Sci. Plena

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“…Adiantum (Pteridaceae) had the highest number of species (five). This was expected since it has species that colonize various environments and is often the most diverse genus in studies that report the occurrence of Pteridaceae (Maciel & Pietrobom 2010;Winter et al 2011;Miranda et al 2015;Silva Junior et al 2020;Oliveira et al 2021;Fernandes et al 2022).…”

Section: Identification Key To the Lycophyte And Fern Species In The ...mentioning

confidence: 98%

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

Silva Junior,

Prado,

Ferreira

et al. 2024

Biota Neotrop.

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We present a key to identify and an annotated list of lycophytes and ferns of the Immediate Geographical Region of São Luís, Maranhão State, which has ecotonal characteristics of Amazonian Forest, Cerrado, and Coastal Vegetation. Specimens were collected monthly between April 2020 and September 2022 in the 13 municipalities of this region. A total of 64 species were identified, including 61 species of ferns, in 18 families and 38 genera, and three species of lycophytes, in two genera and one family. The most representative families were Pteridaceae (18 species) and Polypodiaceae (nine species). The most recorded substrate of occurrence was terrestrial with 35 species (54.6%), followed by epiphytic with 15 species (23.4%), aquatic with four species (6.2%), rupicolous with three species (4.6%), and hemiepiphytic with two species (3.1%). Five species (7.8%) had more than one life form. This study expands the knowledge about the geographic distribution of fern and lycophyte species in the central region of Northern Maranhão, in Northeastern Brazil, which until now had several sampling gaps. Maranhão has a diversity that is still poorly reported and known compared to other states in South and Southeast Brazil. Therefore, floristic surveys are essential to increase what is known about the flora, especially in areas under anthropic pressure and places with few collections, such as the ecotonal areas in Maranhão.

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Amazonian Rivers from the Brazilian Shield: Xingu and Tapajós

Montag,

Sousa,

Netto-Ferreira

et al. 2025

Rivers of South America

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An inventory of the ferns and lycophytes of the Lower Tapajós River Basin in the Brazilian Amazon reveals collecting biases, sampling gaps, and previously undocumented diversity

Cited by 4 publications

References 63 publications

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

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

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

Amazonian Rivers from the Brazilian Shield: Xingu and Tapajós

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