Consulta: subjectFacets:"Pteridophytes"
Registros recuperados: 13
Data/hora: 01/06/2024 16:38:31

The subalpine and alpine flora of Mount Jaya (New Guinea): status and threats
Provedor de dados: 16
Autores: Utteridge, T.M.A.; Edwards, P.J.
The highest mountains in South-East Asia are in the Sudirman range of Indonesian New Guinea; the highest is Mt Jaya which rises to 4 884 m and is still partly glaciated. The geological history of the region has left it rich in mineral deposits and the alpine area is currently being mined for copper. In 1997 a project was initiated by the Royal Botanic Gardens, Kew, in conjunction with the mining companies Rio Tinto and PT-Freeport Indonesia, to study the region’s flora. An introduction to the region, including geology, glaciation and past exploration will be given, as well as the history and objectives of the Kew project. During the project, Kew made several collaborative expeditions to the area, as well as a database of all historical collections from Mt...
Tipo: Article / Letter to the editor
Palavras-chave: Conservation; Indonesia; Mining; Pteridophytes.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/525038

Taxonomic revision of Elaphoglossum subsection Muscosa (Dryopteridaceae)
Provedor de dados: 16
Autores: Vasco, A.
The present paper provides a monograph of Elaphoglossum subsect. Muscosa, a monophyletic group supported by molecular phylogenetic analyses. The monograph includes keys, full synonymy, descriptions, representative specimens examined, an index to collectors’ names and numbers, illustrations, spore photomicrographs, and distribution maps for all species. Morphologically, the subsection is recognized by scaly rhizomes, petioles and laminae, obtuse leaf apices, and spores that are about twice as long as in other species of Elaphoglossum. Fifteen species of subsect. Muscosa are here recognized, with no subspecies or varieties. All of the species are Neotropical occurring from southern Mexico to Bolivia and Southeastern Brazil, with three species in the West...
Tipo: Article / Letter to the editor
Palavras-chave: Ferns; Floristics; Pteridophytes; Taxonomy.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/525366

Megaspore germination and initial development of Regnellidium diphyllum Lindman (Pteridophyta, Marsileaceae) sporophytes in the presence of cadmium
Provedor de dados: 88
Autores: Wunder,Denise A.; Droste,Annette; Windish,Paulo G.
Regnellidium diphyllum has its distribution restricted to Southern Brazil and adjoining localities in Uruguay and Argentina. Currently it is on the list of threatened species of Rio Grande do Sul. The conversion of wetlands into agricultural areas or soil contamination by the introduction of waste products and fertilizers may compromise the establishment and survival of this species. Among the pollutants are heavy metals, such as cadmium (Cd). Megaspores were germinated in liquid culture medium, with concentrations 0 (control), 0.39; 0.78; 1.56; 3.12; 6.25; 12.5; 25; 50 and 100 mg L-1 of Cd, starting from a standard solution of Titrisol® at 1000 mg L-1. The increase of Cd in the growth medium to 50 mg L-1 resulted in low germinability (58%), and no...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Ecophysiology; Heavy metals; Pollution; Pteridophytes; Reproduction.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000100017

Ant fauna associated with Microgramma squamulosa (Kaulf.) de la Sota (Polypodiaceae) fern galls
Provedor de dados: 92
Autores: Santos,Marcelo Guerra; Porto,Gabriela Fraga; Lancellotti,Isabella Rodrigues; Feitosa,Rodrigo M.
Abstract Galls are neoformed plant structures created by cell hyperplasia and hypertrophy induced by a number of organisms, especially insects. After adult insects hatch, senescent galls may remain on the host plant and be occupied by a succession of fauna, the most important and dominant being ants. This study aimed at characterizing the ant fauna successor of stem galls induced by microlepidoptera in Microgramma squamulosa (Kaulf.) de la Sota (Polypodiaceae). Four collections were carried out in the municipality of Nova Friburgo, Rio de Janeiro state, Brazil. The galls were packed in plastic bags and taken to the laboratory. Ants were euthanized and conserved in 70° GL alcohol and later identified. A total of 49 stem galls were collected and analyzed, 15...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Ecosystem engineers; Fern-insect interactions; Myrmecophily; Pteridophytes.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000200101

Biogeographic analysis and key to the genera of ferns and lycophytes of Mburucuyá National Park, Corrientes, Argentina
Provedor de dados: 97
Autores: MEZA-TORRES,ESTEBAN I; DE LA SOTA,ELÍAS R; FERRUCCI,MARÍA S.
The diversity of ferns and lycophytes of Corrientes province, Argentina is not well understood. Our field work in the Mburucuyá National Park in Corrientes province as well as a literature review finds 29 genera and 48 infrageneric taxa of ferns and lycophytes for this Park. A comparison of the Park's species diversity with other protected areas in northeastern Argentina using Jaccard's similarity coefficient and the infrageneric taxa biodiversity index proposed by Squeo et al. (1998) are analized. A key to the Park's ferns and lycophytes genera is provided.
Tipo: Journal article
Palavras-chave: Floristic diversity; Monilophytes; Protected area; Pteridophytes.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000100005

Similar understorey structure in spite of edaphic and floristic dissimilarity in Amazonian forests
Provedor de dados: 36
Autores: SUOMINEN,Lassi; RUOKOLAINEN,Kalle; PITKÄNEN,Timo; TUOMISTO,Hanna.
Forest structure determines light availability for understorey plants. The structure of lowland Amazonian forests is known to vary over long edaphic gradients, but whether more subtle edaphic variation also affects forest structure has not beenresolved. In western Amazonia, the majority of non-flooded forests grow on soils derived either from relatively fertile sediments of the Pebas Formation or from poorer sediments of the Nauta Formation. The objective of this study was to compare structure and light availability in the understorey of forests growing on these two geological formations. We measured canopy openness and tree stem densities in three size classes in northeastern Peru in a total of 275 study points in old-growth terra firme forests...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canopy openness; Iriartea deltoidea; Pebas Formation; Pteridophytes; Stem density.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000400393

Lycophytes and ferns composition of Atlantic Forest conservation units in western Paraná with comparisons to other areas in southern Brazil
Provedor de dados: 39
Autores: Lautert,Mayara; Temponi,Lívia Godinho; Viveros,Raquel S.; Salino,Alexandre.
This study surveyed lycophyte and fern species in four forest fragments in western Paraná, Brazil, and compared them to 15 other fragments with different plant formations from the Atlantic Forest biome in southern Brazil. In total, five lycophyte species (in two families and two genera) and 98 species and two varieties of ferns (in 16 families and 38 genera) were registered in the four fragments. The most represented families were Pteridaceae (23 spp.), Polypodiaceae (18 spp.), Aspleniaceae (13 spp.), and Thelypteridaceae (11 spp.). Asplenium (12 spp.), Thelypteris (10 spp.), and Blechnum (seven spp.) were among the most represented genera. The occurrence of Dicksonia sellowiana was noteworthy because it was associated with seasonal semideciduous forest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria forest; Pteridophytes; Semideciduous forest; Similarity; Species richness.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400499

The scaly tree ferns (Cyatheaceae-Polypodiopsida) of Brazil
Provedor de dados: 39
Autores: Weigand,Anna; Lehnert,Marcus.
ABSTRACT A synopsis of all scaly tree fern species (Cyatheaceae) occurring in Brazil is presented. We recognize 51 species in three genera [Sphaeropteris one species, Alsophila four species (one subspecies, two varieties), and Cyathea 45 species (one variety) ] with 17 taxa being endemic to Brazil. One hybrid endemic to Brazil is recognized. Further included are five species that have not yet been recorded in Brazil, but are expected here because they are found in adjacent countries and occur literally on the border with Brazil. We present the first key covering the family for the whole territory of Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alsophila; Cyathea; Cyatheaceae; Pteridophytes; Sphaeropteris; Synoptical key; Systematics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300336

Selaginella P. Beauv. from Minas Gerais, Brazil
Provedor de dados: 39
Autores: Heringer,Gustavo; Valdespino,Iván A.; Salino,Alexandre.
Selaginella P. Beauv. is the only genus in the family Selaginellaceae Willk. The genus is monophyletic, has a cosmopolitan distribution, contains about 750 species and can be characterized by the presence of rhizophores, leaves, a ligule, heterospory and adaxial, reniform sporangia. Twenty species were found in the study area: Selaginella alstonii, S. contigua, S. convoluta, S. decomposita, S. erectifolia, S. erythropus, S. flexuosa, S. jungermannioides, S. macrostachya, S. marginata, S. microphylla, S. muscosa, S. producta, S. sellowii, S. sematophylla, S. suavis, S. sulcata, S. tenella, S. tenuissima and S. vestiens. Two new species records for the state are presented (S. jungermannioides and S. tenella). We present descriptions of the genus and species,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycophytes; Pteridophytes; Selaginellaceae; Southeastern Brazil; Taxonomy.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100060

Different slopes of a mountain can determine the structure of ferns and lycophytes communities in a tropical forest of Brazil
Provedor de dados: 42
Autores: NETTESHEIM,FELIPE C.; DAMASCENO,ELAINE R.; SYLVESTRE,LANA S.
A community of Ferns and Lycophytes was investigated by comparing the occurrence of species on different slopes of a paleoisland in Southeastern Brazil. Our goal was to evaluate the hypothesis that slopes with different geographic orientations determine a differentiation of Atlantic Forest ferns and lycophytes community. We recorded these plants at slopes turned towards the continent and at slopes turned towards the open sea. Analysis consisted of a preliminary assessment on fern beta diversity, a Non Metric Multidimensional Scaling (NMDS) and a Student t-test to confirm if sites sampling units ordination was different at each axis. We further used the Pearson coefficient to relate fern species to the differentiation pattern and again Student's t-test to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic rain forest; Topography; Pteridophytes; Richness; Environmental factors.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100199

A synopsis of fern galls in Brazil
Provedor de dados: 49
Autores: Santos,Marcelo Guerra; Maia,Valéria Cid.
Abstract Galls are neo-formed plant structures induced by species-specific interaction between an inducing organism and a host plant. Lycophytes and ferns are two distinct plant lineages historically lumped together as pteridophytes. A number of authors suggest low gall frequency in lycophytes and ferns, compared to angiosperms. This study aimed at compiling an updated overview of fern galls in Brazil, providing information on hosts, gall-inducing organisms and associated fauna. The synopsis was compiled using existent data and by updating scientific names and gathering new information obtained by the authors in fieldwork. To date, galls have been recorded on 16 fern species but none on lycophytes. However, the inducer was identified at species level in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pteridophytes; Lycophytes; Galls; Neotropical; Cecidomyiidae.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000300601

Fern and lycophyte flora of Acre state, Brazil
Provedor de dados: 49
Autores: Prado,Jefferson; Hirai,Regina Yoshie; Moran,Robbin Craig.
Abstract This paper provides keys, illustrations, short descriptions, and voucher specimen citations for the ferns and lycophytes of Acre, Brazil. We recognize a total of 212 species in 66 genera and 28 families. Of these, the lycophytes are represented by 14 species, 4 genera, and 2 families, and the ferns by 8 varieties, 1 subspecies, 198 species, 62 genera, and 26 families. The total represents an increase of 22 species and two varieties compared to a checklist published in 2009. The six most species-rich genera are Adiantum (21 spp.), Asplenium (14), Selaginella (12), Trichomanes (11), Lindsaea, and Microgramma (9 each). None of the species treated here are endemic to Acre. A new combination is made for Meniscium chrysodioides Fée var. goyazense.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Diversity; Floristics; Pteridophytes; Taxonomy.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000400304

Occurrence of myo-inositol-1-phosphate phosphatase in pteridophytes: characteristics of the enzyme from the reproductive pinnules of Dryopteris filix-mas (L.) Schott
Provedor de dados: 61
Autores: Banerjee,Ritwika; Chhetri,Dhani R.; Adhikari,Jukta.
Evident myo-inositol-1-phosphate phosphatase (MIPP) activity has been detected both in the vegetative as well as in the spore-bearing organs of some selected pteridophytes having wide phylogenetic diversity. The basic characterization of this enzyme was carried out using the cosmopolitan fern Dryopteris filix-mas. The enzyme was partially purified from the cytosol fraction obtained from the reproductive pinnules of the plant to about 41-fold over the initial homogenate following low-speed centrifugation, streptomycin sulfate precipitation, 25-70% ammonium sulfate fractionation, CM Sephadex C-50 chromatography and finally gel-filtration on Ultrogel AcA 34. The apparent molecular weight of the native MIPP was estimated to be 94 kDa. The enzyme activity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dryopteris filix-mas; Myo-inositol-1-phosphate phosphatase; Pteridophytes; Reproductive pinnules.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000200003