Results 21 to 30 of about 3,176 (128)

Phenolics and condensed tannins of high altitude Pteridium arachnoideum in relation to sunlight exposure, elevation, and rain regime

Biochemical Systematics and Ecology, 2007
Abstract Non-adapted plants growing in high altitude such as bracken fern Pteridium arachnoideum are exposed to environmental extremes that may induce a chemical adaptive response. Here we show that there is a non-uniform distribution of low (LMP) and high molecular weight (HMP) phenolics in the frond parts of P.
Miguel E. Alonso-Amelot, Alberto Oliveros-Bastidas, Maria Pía Calcagno-Pisarelli   +2 more
openaire   +2 more sources

Interference of Pteridium arachnoideum (Kaulf.) Maxon. (Dennstaedtiaceae) on the establishment of rainforest trees Interferência de Pteridium arachnoideum (Kaulf.) Maxon. (Dennstaedtiaceae) no estabelecimento de árvores tropicais

Brazilian Journal of Biology, 2010
In order to identify the effect of P. arachnoideum, we studied 11 native tree species commonly used in reforestation projects. Bioassays were conducted in laboratory to evaluate the effect of bracken leachate on the germination and morphology of ...
DM. Silva Matos, TA. Belinato
doaj   +1 more source

Caracterización poblacional de Pteridium arachnoideum (Kaulf.) Maxon y su vegetación asociada al páramo antrópico del sur del Ecuador

Revista Forestal Mesoamericana Kurú, 2023
Los páramos ecuatorianos afectados por incendios forestales presentan cambios en su estructura, composición florística, modificación en sus procesos ecológicos y aparición de especies invasoras. El presente trabajo se desarrolló en el Parque Universitario “Francisco Vivar Castro”, con la finalidad de caracterizar el estado actual de P.
Tillaguango-Pintado, Jhoana, Muñoz-Chamba, Luis, Muñoz, Johana, Aguirre, Zhofre   +3 more
openaire   +3 more sources

RESULTADOS LABORATORIAIS COMPARATIVOS EM FÊMEAS NELORE DE DIFERENTES CATEGORIAS PROVENIENTES DE FAZENDAS COM E SEM A PRESENÇA DE Pteridium arachnoideum NAS PASTAGENS [PDF]

Arquivos de Ciências Veterinárias e Zoologia da UNIPAR, 2016
A Pteridium arachnoideum, anteriormente classificada como Pteridium aquilinum, popularmente conhecida por samambaia, é um dos vegetais tóxicos mais preocupantes em vários países, incluindo o Brasil. No estado do Paraná há várias regiões onde a planta possui característica endêmica.
André Hiroshi Quadros Watanabe, Wilmar Sachetin Marçal   +1 more
openaire   +3 more sources

Alterações anátomo-histopatológicas em ratos submetidos à dieta com extrato de broto de samambaia (Pteridium aquilinum var. arachnoideum) de dois municípios do estado do Paraná Macroscopic and microscopic changes in rats fed on a bracken fern diet (Pteridium aquilinum var. arachnoideum) from different regions of Parana State, Brazil [PDF]

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2005
The carcinogenicity of bracken fern harvest from two regions of Paraná State to induce hematury in rats was studied. In order to do that, 33 Wistar rats were divided in three groups.
G.D. Cruz, A.P.F.R.L. Bracarense, L. Yamasaki, D.E.A. Cortez   +3 more
doaj   +5 more sources

Ants associated with fronds of the tropical bracken fern Pteridium esculentum subsp. arachnoideum

Biota Neotropica, 2022
Abstract: Pteridium is a cosmopolitan genus of ferns that possess nectaries on its fronds (fern leaves), thereby attracting ants. Foliar (or extrafloral) nectaries are nectar-producing glands that are not related to pollination, but rather attract ants and other arthropods.
Isabella Rodrigues Lancellotti, Antônio José Mayhé-Nunes, Rodrigo Machado Feitosa, Anderson dos Santos Portugal, Marcelo Guerra Santos   +4 more
openaire   +2 more sources

Proximity and abundance of mother trees affects recruitment patterns in a long‐term tropical forest restoration study

Ecography, Volume 44, Issue 12, Page 1826-1837, December 2021., 2021
Remnant trees and forest fragments in agricultural landscapes can be important sources of propagules to facilitate forest recovery. However, many studies simply quantify forest cover in the surrounding landscape as a percentage, with little attention given to species composition, and subsequently fail to detect an effect on recruitment patterns.
Rakan A. Zahawi, Leland K. Werden, Miriam San‐José, Juan Abel Rosales, Jeffry Flores, Karen D. Holl   +5 more
wiley   +1 more source

Growth of Tropical Bracken (Pteridium arachnoideum): Response to Weather Variations and Burning [PDF]

Invasive Plant Science and Management, 2010
AbstractThe ecology of tropical bracken, which occurs in tropical regions, is not well known. We studied its response to weather variations and burning in the south Ecuadorian Andes, where this weed had already overgrown 40% of the pastureland. In field observations, a constant 1 : 1 ratio of emerging and dying leaves suggested limitation of frond ...
Kristin Roos, Rütger Rollenbeck, Thorsten Peters, Jörg Bendix, Erwin Beck   +4 more
openaire   +1 more source

Variation in aboveground biomass and necromass of two invasive species in the Atlantic rainforest, southeast Brazil Variação da biomassa e necromassa aérea de duas espécies invasoras na floresta atlântica, sudeste do Brasil

Acta Botânica Brasílica, 2009
This paper describes the variation of the above-ground biomass, necromass, and net above-ground primary production (NAGPP) of two weed species, Panicum maximum Jacquin (Poaceae) and Pteridium arachnoideum (Kaulf.) Maxon.
Rita Cássia Quitete Portela, Dalva Maria Silva Matos, Ludmila Pugliese de Siqueira, Maria Isabel Guedes Braz, Leonardo Silva-Lima, Robert Hunter Marrs   +5 more
doaj   +1 more source

Fern flora of Viçosa, Minas Gerais State, Brazil: Dennstaedtiaceae, Lindsaeaceae and Saccolomataceae

Hoehnea, 2023
As part of an ongoing project treating the ferns and lycophytes from the region of Viçosa, Minas Gerais State, Brazil, we here present the taxonomic treatment of the early divergent lineages of the leptosporangiate ferns: the families Dennstaedtiaceae ...
Nelson Túlio Lage Pena, Pedro Bond Schwartsburd   +1 more
doaj   +1 more source