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Registros nuevos de Abronia mixteca (Sauria: Anguidae) en Oaxaca, México New records of Abronia mixteca (Sauria: Anguidae) in Oaxaca, Mexico  [cached]
Cintia Natalia Martín-Regalado,Mario C. Lavariega,Rosa Ma. Gómez-Ugalde
Revista mexicana de biodiversidad , 2012,
Abstract: Se dan a conocer registros nuevos de Abronia mixteca en el estado de Oaxaca, México. Los organismos fueron encontrados en bosque de pino, pino-encino y encino-pino en 5 localidades en la subprovincia fisiográfica Monta as y Valles del Occidente de Oaxaca. Estos registros incrementan el conocimiento del área de distribución, rango altitudinal y hábitat de A. mixteca. We present new records of Abronia mixteca in the Mexican state of Oaxaca. The organisms were found in pine forest, pine-oak forest, and oak-pine forest from 5 localities in the physiographic subprovince of Mountains and Valleys of Western Oaxaca. These records increase the distribution area of A. mixteca known to date.
A new species of Celestus from west-central Panama, with consideration of the status of the genera of the Anguidae: Diploglossinae (Squamata)
Savage,Jay M; Lips,Karen R; Ibá?ez D,Roberto;
Revista de Biología Tropical , 2008,
Abstract: a recently discovered new species of diploglossine lizard is described from west-central panama. the distinctiveness of the nominal genera celestus and diploglossus is confirmed; the new form represents the southernmost record for the genus celestus. a summary of selected characteristics and general distribution is presented for all recent species of diploglossines, including members of the antillean genera saurisia and wetmorea and the south american genus ophiodes. a systematic key to mainland members of the genus celestus is provided. rev. biol. trop. 56 (2): 845-859. epub 2008 june 30.
The choice of bromeliads as a microhabitat by Scinax argyreornatus (Anura, Hylidae)
Pederassi, J.;Lima, MSCS.;Peixoto, OL.;Souza, CAS;
Brazilian Journal of Biology , 2012, DOI: 10.1590/S1519-69842012000200001
Abstract: the association of anurans to bromeliads presents different degrees of interaction such as: eventual, obligatory and bromeligen. the frog species scinax argyreornatus shows a regular association with these plants. the goal of this study is to characterise the degree of association between the frog s. argyreornatus to different species of bromeliads. we identified which species of bromeliad is regularly associated with s. argyreornatus and recognised which factors interfere with this association preference. we analysed the concentration of relative dominance of frogs per bromeliad species. as possible criteria for frog association preference to different bromeliads species we established the analysis of leaves number, length and width, number of leaf axils, stored water in the axils, ph and relative humidity, among other organographic components. our observations were analyzed by anova followed by the tukey test. we also evaluated the preference for association by the constancy of bodenheimer. the correlation matrix indicated that the relative humidity is the factor responsible for the frog-bromeliads association, except for aechmea sp.. however aechmea sp. was the species with greater constancy of occupation followed by quesnelia arvensis and neoregelia johannis. according to our statistical results, aechmea sp. and q. arvensis are not different regarding organographic parameters, but differ from n. johannis. our observations suggest that the bromeliads organographic structure and the relative humidity are key conditions which influence the preferences of s. argyreornatus to bromeliad species, while the other features showed no correlation.
Current List of the Native Bromeliads of Soconusco, Chiapas, Southeast Mexico  [PDF]
Dayam Santiago,Sonia Ruiz,Lourdes Adriano,Miguel Salvador
International Journal of Botany , 2006,
Abstract: In Central America, native bromeliads are an alternative for productive diversification in coffee plantations; however, first, a census in each area should be carried out and inventories must be up-dated. During 2004 and 2005, field explorations were carried out in the Soconusco region, on the Mexico/Guatemala border, in order to collect live specimens and to create a reference collection of plants in the University (UNACH, Universidad Autónoma de Chiapas, Tapachula). To verify if the collected species were native or not, an ethnobotanical study was carried out, with semi-structured interviews applied to people from the visited communities; the information was then compared with the literature. The study revealed few uses of native bromeliads. To date, we have 186 accessions which had been characterized and classified in 6 genera and 29 species. This number of species comprises only 22.8% of the bromeliads of Chiapas, but represents a high density of species (3.113 species/1000 km2). Most of the accessions are from middle altitudes (500-1500 m.a.s.L.). We present the first inventory of the flora Bromeliaceae for the region of Soconusco.
The effect of water stress on seed germination of three terrestrial bromeliads from restinga
Mantovani, André;Iglesias, Ricardo R.;
Brazilian Journal of Botany , 2010, DOI: 10.1590/S0100-84042010000100017
Abstract: bromeliad seedlings are rarely found on sandy coastal plains (restinga), limited, probably, by stressful conditions and/or specific abiotic requirements for germination. the effect of water stress on rate, time, synchronicity and spreading of germination was evaluated here for three terrestrial bromeliads from the restinga of maricá using osmotic solutions of polyethyleneglicol 6000 (peg 6000), from 0.0 to -0.26 mpa for 30 days. water stress induced by peg lowered rate and increased time and synchronicity values, besides the number of daily events of bromeliad seed germination, under water potentials between 0.00 to -0.14 mpa. no seeds germinated under water potentials lower than -0.14 mpa. these results reinforce a constant and/or high moisture requirement for bromeliad seeds to germinate. we conclude that bromeliads are not able to act as pioneer plants through germination outside the vegetation islands of the restinga of maricá, due to the inability of seeds to germinate under lower water potential.
Terrestrial bromeliads as seed accumulation microsites in a xerophytic forest of Southern Chaco, Argentina
Barberis,Ignacio Martín; Boccanelli,Silvia Irene; Alzugaray,Claudia;
Bosque (Valdivia) , 2011, DOI: 10.4067/S0717-92002011000100007
Abstract: the understory of the schinopsis balansae forests of southern chaco is frequently covered by dense populations of two bromeliad species (aechmea distichantha and bromelia serra). these bromeliads usually act as traps capturing propagules and litter falling from the canopy. some populations of these bromeliad species have been removed to ease cattle management, without considering their possible effects on forest regeneration. therefore, the objective of this work was to evaluate the importance of both bromeliads as microsites for seed accumulation of woody and herbaceous species. ten plots with bromeliads were selected, where one soil sample and one plant of each species were taken. from the material collected among bromeliad leaves, the seeds and propagules were separated. likewise, soil samples were washed and the seeds were separated from the litter collected. seeds were determined to morphospecies and counted. there were 352 seeds (230 on bromeliads and 122 in the soil) from 48 species (10 woody and 38 herbaceous species). seed abundance of woody species was higher on bromeliad plants (70 seeds) than on the soil (six seeds). in contrast, a higher richness of herbaceous species was recorded on the soil. therefore, both bromeliads seem to be important microsites for seed accumulation of woody species. however, it is not known whether bromeliads are a safe site for seedling establishment.
Does native bromeliads represent important breeding sites for Aedes aegypti (L.) (Diptera: Culicidae) in urbanized areas?
Santos, CB;Leite, GR;Falqueto, A;
Neotropical Entomology , 2011, DOI: 10.1590/S1519-566X2011000200019
Abstract: this study evaluates the importance of native bromeliads growing on rocky outcrops interspersed with urbanized areas as breeding sites for the aedes aegypti (l.) in vitória, state of espírito santo, brazil. oviposition traps were installed in backyards of houses in two separate zones. in the first zone houses were up to 50 m away from the rocky outcrops, while in the second zone they were at least at 200 m from the rocky outcrops. aedes aegypti was significantly more abundant in the latter zone. the finding was that rocky outcrops with native bromeliads, even with the greater availability of potential breeding sites, do not play an important role as breeding sites for a. aegypti. this conclusion supports the hypothesis that the macrobiota of native bromeliads plays an important role in the natural control of a. aegypti. besides, the interspecific competition between species of mosquitoes and the attractiveness of bromeliads could also be important factors.
Are Algae Relevant to the Detritus-Based Food Web in Tank-Bromeliads?  [PDF]
Olivier Brouard,Anne-Hélène Le Jeune,Céline Leroy,Régis Cereghino,Olivier Roux,Laurent Pelozuelo,Alain Dejean,Bruno Corbara,Jean-Fran?ois Carrias
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0020129
Abstract: We assessed the occurrence of algae in five species of tank-bromeliads found in contrasting environmental sites in a Neotropical, primary rainforest around the Nouragues Research Station, French Guiana. The distributions of both algal abundance and biomass were examined based on physical parameters, the morphological characteristics of bromeliad species and with regard to the structure of other aquatic microbial communities held in the tanks. Algae were retrieved in all of the bromeliad species with mean densities ranging from ~102 to 104 cells/mL. Their biomass was positively correlated to light exposure and bacterial biomass. Algae represented a tiny component of the detrital food web in shaded bromeliads but accounted for up to 30 percent of the living microbial carbon in the tanks of Catopsis berteroniana, located in a highly exposed area. Thus, while nutrient supplies are believed to originate from wind-borne particles and trapped insects (i.e., allochtonous organic matter), our results indicate that primary producers (i.e., autochtonous organic matter) are present in this insectivorous bromeliad. Using a 24-h incubation of size-fractionated and manipulated samples from this plant, we evaluated the impact of mosquito foraging on algae, other microorganisms and rotifers. The prey assemblages were greatly altered by the predation of mosquito larvae. Grazing losses indicated that the dominant algal taxon, Bumilleriopsis sp., like protozoa and rotifers, is a significant part of the diet of mosquito larvae. We conclude that algae are a relevant functional community of the aquatic food web in C. berteroniana and might form the basis of a complementary non-detrital food web.
Geographic distribution of epiphytic bromeliads of the Una region, Northeastern Brazil
Fontoura, Talita;Santos, Flavio Antonio Ma?s dos;
Biota Neotropica , 2010, DOI: 10.1590/S1676-06032010000400017
Abstract: many brazilian atlantic rainforest plant and animal species are geographically restricted to southern bahia and northern espírito santo states. we investigated the geographic distribution of epiphytic bromeliads in the lowland forest of the una region (15° 17' 34' s - 39° 04' 30'' w) in southern bahia. specifically, we addressed the following questions: i) what is the extent of each species distribution?; and ii) are the bromeliaceae subfamilies distributed differently from one another? almost half of the 40 species (47.5%) occur exclusively in the southern bahia-northern espírito santo region and are herein referred as endemic species. the highest percentage of the 15 species of tillandsioideae (46.7%) occur throughout the south american continent and most of the 25 species of bromelioideae (68.0%) are mainly represented by endemic species. the una region has almost two times more species than a forested area located 40 km west, suggesting marked increases in diversity in over relatively short distances. the endemism data around una indicates that species are geographically distributed over an area spanning approximately six to seven degrees in latitude and longitude. this result contrasts with the geographic distribution of andean epiphytes, mainly represented by tillandsioideae, that have large geographical distributions. larger-scale analyses and standardized methods are necessary to verify whether the narrow geographical distribution of most epiphytic bromeliads in the una region is consistent across different forest types of the atlantic rainforest.
Macroinvertebrates inhabiting the tank leaf terrestrial and epiphyte bromeliads at Reserva Adolpho Ducke, Manaus, Amazonas
Torreias, Sharlene Roberta da Silva;Ferreira-Keppler, Ruth Leila;
Brazilian Archives of Biology and Technology , 2011, DOI: 10.1590/S1516-89132011000600015
Abstract: the aim of this work was to investigate the diversity of macroinvertebrates and also verify if the abundance and diversity of diptera were influenced by the abiotic factors. the samples were collected from the epiphytic and terrestrial bromeliads g. brasiliensis (1 and 3m) in wet and dry seasons at reserva adolpho ducke analyzed total of 144 samples were analyzed from a total of 15,238 individuals collected. these conatined 14,097 insects and, among these, 8,258 were immature diptera, represented by eight most abundant families: chironomidae, ceratopogonidae and culicidae. the relationship of diptera diversity was influenced by the seasons and stratifications (p= 0.01); the abundance was influenced by the volume of water (p= 0.02) and the relationship between the season and volume of water in the terrestrial bromeliads was significant (p= 0.01). this study represented the first contribution to knowledge of community of macroinvertebrates associated to bromeliads g. brasiliensis in central amazon.
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