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Registros recuperados: 8
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A relict species restricted to a quartzitic mountain in tropical America: an example of microrefugium? Acta Botanica
Barbosa,Newton Pimentel de Ulhôa; Fernandes,G. Wilson; Sanchez-Azofeifa,Arturo.
ABSTRACTWe examined the distribution of Coccoloba cereifera,a tropical endemic species that occurs in a small area in the Espinhaço mountain range, southeastern Brazil. It is hypothesized that its narrow distribution is strongly related to the spatially scattered distribution of sandfields. However, this soil type extends far beyond the small region where C. cereifera is currently found, indicating that other factors might be involved in the distribution of this species. Coccoloba cereifera also displays all traits of a relict population in a microrefugium. As a result, we were encouraged to explore other factors potentially related to the distribution of the species. In an attempt to aid in the understanding of the processes and mechanisms that lead C....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coccoloba cereifera; Espinhaço Mountains; Maximum entropy; Rupestrian grasslands; Serra do Cipó.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300299
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Bukholderia strains promote Mimosa spp. growth but not Macroptilium atropurpureum Rev. Ciênc. Agron.
Araújo,Kaliane Sírio; Carvalho,Fernanda de; Moreira,Fatima Maria de Souza.
ABSTRACT The aim of this study was to evaluate the relationship and symbiotic efficiency of 14 strains of Burkholderia isolated from rupestrian grasslands, using M. atropurpureum and Mimosa tenuiflora as trap plants, with the species M. atropurpureum, Mimosa bimucronata and M. foliolosa. For the nodulation and symbiotic efficiency test in M. atropurpureum, long-neck bottles containing nutrient solution were used. The experiments with Mimosa spp. were carried out in tubes containing vermiculite (160 cm3) and sand (80 cm3) (2:1). The parameters under evaluation were number of nodules, nodules dry matter production, shoots dry matter, roots dry matter, and total dry matter production for all the species analyzed; and plant height, diameter, and the Dickson...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rupestrian grasslands; Nitrogen-fixing bacteria; Symbiosis; Mimosa bimucronata; Mimosa foliolosa.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100041
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Ecophysiological performance of a threatened shrub under restored and natural conditions in a harsh tropical mountaintop environment Acta Botanica
Castro,Silvana A. B.; Sá,Camila E. M.; Mourão,Fabiana A.; Duarte,Heitor M.; Fernandes,G. Wilson; Lemos-Filho,José P..
Ecophysiological responses of plants are useful for monitoring the success of ecological restoration projects that target species conservation. In this study we evaluated the ecophysiological traits of individuals of Chamaecrista semaphora from a natural population and from a site under restoration. Water potential and chlorophyll a fluorescence parameters were measured both in adult and young plants of the two populations. No difference in water potential was found between sites, but individuals in the restored site had higher water potential at predawn. Adults in the natural site presented lower daily values of potential quantum yield, indicating the occurrence of photoinhibition. Individuals in the restored site also presented higher maximum relative...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chlorophyll fluorescence; Ecological restoration; Endangered species; Plant performance; Rupestrian grasslands.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100017
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Effects of sex and altitude on nutrient, and carbon and nitrogen stable isotope composition of the endangered shrub Baccharis concinna G.M. Barroso (Asteraceae) Acta Botanica
Fernandes,G. Wilson; Duarte,Heitor Monteiro; Silveira,Fernando A. O.; Broetto,Fernando; Lüttge,Ulrich; Rennenberg,Heinz.
ABSTRACT Previous ecological studies of dioecious plant species have found that female plants preferentially occur at lower altitudes where there are typically better nutritional conditions, while male plants often occur in less favorable sites. We compared the ecophysiological performance of male and female plants in three populations of the dioecious Baccharis concinna, an endemic species of rupestrian grasslands of Serra do Cipó, in southeastern Brazil. We hypothesized that physiological differences between the sexes would explain the distribution patterns of the populations. Analyses of the tissue content of phosphorus (P), calcium (Ca), potassium (K) and sodium (Na), and carbon and nitrogen stable isotopes, were used to assess nutritional status and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Campos rupestres; Dioecy; Plant sex; Resource allocation; Rupestrian grasslands; Serra do Cipó.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200229
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Geographic space, relief, and soils predict plant community patterns of Asteraceae in rupestrian grasslands, Brazil. Repositório Alice
CHAVES, D. A.; RIBEIRO-SILVA, S.; PROENÇA, C. E. B.; OLIVEIRA, W. L.; BRINGEL JÚNIOR, J. B. A.; MEDEIROS, M. B. de.
bitstream/item/195729/1/Chaves-et-al-2019-Biotropica.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Conservation units; Espinhaço Range; Multivariate regression trees; Rupestrian grasslands; Variance partitioning.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1108145
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Growing straight versus growing decumbent: soil quality and allometry in Syagrus glaucescens Becc. (Arecaceae), an endemic and threatened palm of the Espinhaço Mountains, Brazil Acta Botanica
Miola,Deise Tatiane Bueno; Fernandes,G. Wilson.
ABSTRACTSyagrus glaucescens is an endemic palm found in the rupestrian grasslands of the Espinhaço Mountains in southeastern Brazil. It is highly associated with quartzitic soils and exhibits strong intra-specific morphological variation in the different areas where it occurs. Allometric traits were used to verify whether there are any significant differences in the morphological traits between populations of this species located in two distinct areas. In the region of the Serra do Cipó individuals exhibit decumbent stems whereas on the Diamantina Plateau stems are straight and perpendicular to the ground. Soil quality was related to plant morphological traits to test the hypothesis that allometric variation is influenced by soil nutritional differences....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum saturation; Diamantina; Phenotypic variability; Rupestrian grasslands; Serra do Cipó; Soil-plant relationships.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300417
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Phytosociology of the herbaceous-subshrub layer of a rupestrian complex in Serra do Espinhaço, Brazil Acta Botanica
Oliveira,Paula Alves; Pereira,Israel Marinho; Messias,Maria Cristina Teixeira Braga; Oliveira,Marcio Leles Romarco de; Pinheiro,André César; Machado,Evandro Luiz Mendonça; Oliveira,Junior Lacerda Alves de.
ABSTRACT Rupestrian complexes of the Serra do Espinhaço are recognized for their high degree of biodiversity and endemism. However, environmental impacts, particularly from mining, have degraded these environments. The purpose of this study was to describe the herbaceous-subshrub communities that occur in quartzitic (QRC) and ferruginous (FRC) rupestrian complexes in different seasons of the year, with regard to floristic similarity and phytosociological structure. Additionally, the study aimed to identify native species with potential use for the restoration of similar degraded areas. Vegetation was sampled from plots located in the municipality of Conceição do Mato Dentro, state of Minas Gerais. Five contiguous strata of 10 × 50 m were demarcated in each...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canga; Cerrado; Ferruginous grasslands; Restoration of degraded areas; Rupestrian grasslands.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100141
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Vegetative propagation strategies of four rupestrian species of Leiothrix (Eriocaulaceae) Rev. Bras. Bot.
Coelho,Flávia de Freitas; Capelo,Christina Dorvalina Lopes; Neves,Ana Carolina Oliveira; Figueira,José Eugênio Côrtes.
Leiothrix is endemic of South America and includes 37 species, 25 of which occur in the state of Minas Gerais. Nineteen of those occur in the "Serra do Cipó", a mountain chain, located in the southern portion of the Espinhaço mountain range. This study examines vegetative propagation strategies of four species of Leiothrix, endemic to the Minas Gerais portion of the Espinhaço mountain range. For each species we established permanent plots, where we marked 30 to 51 rosettes or clones, and then took morphological and phenological measurements. Leiothrix crassifolia (Bong.) Ruhland and L. curvifolia var. lanuginosa (Bong.) Ruhland are rhizomatous, forming compact clones. Leiothrix vivipara (Bong.) Ruhland does not produce rhizomes, but is pseudoviviparous,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Clonal growth; Eriocaulaceae; Leiothrix; Pseudovivipary; Rupestrian grasslands.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000400013
Registros recuperados: 8
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