Navegando por Autor "COSTA, Jeferson Miranda"

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Acesso aberto (Open Access)
Licófitas e samambaias da Serra do Itauajuri, município de Monte Alegre, Pará, Brasil
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2016-12) GÓES, Julieta Pallos Pinto de Araújo; GÓES NETO, Luiz Armando de Araújo; COSTA, Jeferson Miranda; SOUZA, Filipe Soares de; SILVA, Marcio Roberto Pietrobom da
In this study we present the lycophytes and ferns inventoried in the Serra do Itauajuri, Pará state. Sixty four species distributed in 36 genera and 21 families were registered, with one family, one genus, and four species belonging to the lycophytes lineage, and 20 families, 35 genera, and 60 species belonging to the ferns lineage. The most representative families were Pteridaceae (19 spp.), Polypodiaceae (8), and Selaginellaceae (4). The genera with highest species richness were Adiantum (9 spp.) and Selaginella (4). Most species were collected as terrestrial (35 spp., ca. 55%), occurring in riparian forests (51 spp., ca. 80%), with American distribution pattern (46 spp., ca. 72%). We present two new records for the Northern Region of Brazil (Asplenium pumilum and Marsilea ancylopoda) and two for Pará state (Ophioglossum nudicaule and Selaginella minima). The studied area has distinct environmental characteristics than those commonly observed in Brazilian Amazonia, being a biologically important area. This results gathered information that can support the creation and implementation of the Serra do Itauajuri Conservation Unit, which will guarantee the preservation of its historic and natural wealth.
Acesso aberto (Open Access)
Samambaias e licófitas do Parque Ecológico do Gunma, município de Santa Bárbara do Pará, estado do Pará, Brasil
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2010-06) COSTA, Jeferson Miranda; SILVA, Marcio Roberto Pietrobom da
The Gunma Ecological Park - PEG (Santa Bárbara do Pará, Pará state, Brazil) is one of the few preserved forest remnants in the metropolitan region of Belém. The PEG has a rich phanerogamic flora with rare species, but nothing is known about its seedless vascular-plant flora. Our aim is to present a floristic survey of ferns and lycophytes from Gunma Ecological Park. The 56 recorded species belong to 28 genera and 15 families. This is the first record for Lellingeria suspensa (L.) A.R. Sm. & R.C. Moran in Pará state and also for Polyphlebium diaphanum (Kunth) Ebihara & Dubuisson in the Brazilian Amazon. The richest families were Hymenophyllaceae (15 spp.), Dryopteridaceae (8 spp.), Polypodiaceae (7 spp.) and Pteridaceae (6 spp.). The genera with highest number of species were Trichomanes (7 spp.) and Elaphoglossum (6 spp.). The majority of the species were herbaceous (52 spp.), with epiphytic (30 spp.) and terrestrial (23 spp.) habitat, occurred exclusively in the understory (35 spp.) and presented American distribution (34 spp.). This result demonstrates the importance of Gunma Ecological Park for local/regional seedless vascular-plant flora preservation.