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Breeding biology and reproductive success of Polystictus superciliaris (Aves: Tyrannidae), an uncommon tyrant-flycatcher endemic to the highlands of eastern Brazil Rev. Bras. Zool.
Hoffmann,Diego; Rodrigues,Marcos.
Polystictus superciliaris (Wied, 1831) is a small tyrant-flycatcher endemic to mountaintops in the highlands of eastern Brazil. In this paper we present the first description of the breeding biology of P. superciliaris and estimate its reproductive success from a population inhabiting rocky outcrops. This study was conducted during 2005 in the Parque Estadual da Serra do Rola Moça, municipality of Nova Lima (20°03'S, 44°00'W), state of Minas Gerais, southeastern Brazil. Fourteen pairs of P. superciliaris were banded and monitored. The onset of the breeding season in 2005 was assumed to have been sometime before the 26th of July, while it was assumed to have ended on the 23rd of November based on the last observation of a successful brood. Clutch size was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canga; Clutch size; Laying date; Mayfield method; Nest predation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000300004
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Caracterização florística e fitofisionômica da Serra do Condado, Minas Gerais, Brasil Biota Neotropica
Pifano,Daniel Salgado; Valente,Arthur Sérgio Mouco; Almeida,Hisaias de Souza; Melo,Pablo Hendrigo Alves de; Castro,Ricardo Montianeli de; van den Berg,Eduardo.
O complexo serrano do Espinhaço Sul é ainda floristicamente desconhecido e a conservação destas serras está ameaçada em função de sua exclusiva riqueza mineral. A Serra do Condado, localizada no município de Serro, MG (18° 37' 30" S e 43° 22' 30" W) é um bom exemplo de como as atividades de mineração estão distantes da conservação destes ecossitemas e por tal razão o presente estudo teve como objetivo a caracterização florística e fitofisionômica desta serra. As campanhas de campo foram quinzenais e ocorreram entre os meses de maio/2006 a maio/2007. Foram coletados apenas os materiais botânicos em estágio fenológico reprodutivo. Os mesmos foram incorporados aos acervos dos herbários CESJ, RB e ESAL. O valor em área de cada fisionomia na constituição da...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Similaridade florística; Canga; Cadeia do Espinhaço; Diversidade; Domínio Atlântico.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000100005
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Comportamento de forrageamento e dieta de Polystictus superciliaris (Aves, Tyrannidae) no sudeste do Brasil Iheringia, Sér. Zool.
Hoffmann,Diego; Vasconcelos,Marcelo F.; Lopes,Leonardo E.; Rodrigues,Marcos.
O presente artigo descreve o comportamento de forrageamento e a dieta de Polystictus superciliaris (Wied, 1831), espécie pouco conhecida e de distribuição geográfica restrita às montanhas do leste do Brasil. Este trabalho foi realizado entre abril e dezembro de 2005 no Parque Estadual da Serra do Rola Moça, município de Nova Lima, Minas Gerais (20°03'S, 44°00'W). Para cada observação de forrageamento foram registrados os comportamentos de ataque, a direção e o substrato do ataque, a altura do substrato de forrageamento e a fitofisionomia onde o ataque ocorreu. Para a determinação da dieta da espécie foram feitas observações diretas de campo, sendo também analisado o conteúdo estomacal de 16 indivíduos. Polystictus superciliaris usa preferencialmente a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cadeia do Espinhaço; Comportamento de forrageamento; Conteúdo estomacal; Dieta; Canga.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000300014
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Environmental drivers on leaf phenology of ironstone outcrops species under seasonal climate Anais da ABC (AABC)
GARCIA,LETÍCIA C.; BARROS,FERNANDA V.; LEMOS-FILHO,JOSÉ P..
ABSTRACT Banded iron formations (BIF) have a particular vegetation type and provide a good model system for testing theories related to leaf phenology, due to unique stressful environmental conditions. As a consequence of the stressful conditions of BIF environment, we hypothesize that most species would retain at least some significant canopy cover, even at the end of the dry season, independently of growth form - trees, shrubs, and sub-shrubs. Considering the strong seasonality, we also hypothesize that photoperiod and rainfall act as triggers for leaf fall and leaf flushing in these environments. The majority of the fifteen studied species had a semi-deciduous behavior and shed their leaves mainly during the dry season, with a recovery at the end of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canga; Day length; Drought stress; Evergreen; Leaf shedding; Tropical ecosystems.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100131
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Fitossociologia de campos rupestres quartzíticos e ferruginosos no Quadrilátero Ferrífero, Minas Gerais Acta Botanica
Messias,Maria Cristina Teixeira Braga; Leite,Mariangela Garcia Praça; Meira-Neto,João Augusto Alves; Kozovits,Alessandra Rodrigues.
Foram realizados estudos fitossociológicos de duas áreas em campos rupestres quartzíticos e ferruginosos (sobre itabirito) de MG. Objetivou-se verificar se os litotipos e as geoformas influenciam a vegetação dessas comunidades. Os campos rupestres de ambas litologias foram estratificados pelas geoformas e fitofisionomias em: 1. Áreas inclinadas, com campos limpos 2. Platôs, com campos limpos e 3. Porções inferiores dos perfis, com campos sujos. Amostraram-se 60 parcelas (10x10m), 10 em cada habitat. Estimou-se a cobertura e calculou-se a frequência, dominância e valor de importância (VI) das espécies. Calculou-se a diversidade pelo índice de Shannon-Wiener (H') e equabilidade de Pielou (J') para cada habitat e a similaridade florística entre eles pelo...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cadeia do Espinhaço; Campos ferruginosos; Campos quartzíticos; Canga; Quadrilátero Ferrífero.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000100022
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Growing Periandra mediterranea on post-mining substrate: native Fabaceae with potential for revegetation of degraded rupestrian grasslands in Brazil Acta Botanica
Figueiredo,Maurilio Assis; Diniz,Adriana Pedrosa; Abreu,Adriana Trópia de; Messias,Maria Cristina Teixeira Braga; Kozovits,Alessandra Rodrigues.
ABSTRACT Recovery of degraded areas of rupestrian grasslands is hampered mainly by the limited knowledge regarding substrate management and the biology of native species suitable for revegetation of these areas. The aim of our study was to examine the establishment and growth of Periandra mediterranea in different textures of lateritic substrate from a mining-degraded area. The growth of P. mediterranea was evaluated using fine and coarse laterite, both with and without the addition of topsoil. Survival, dry biomass, content of chemical elements and nodulation were evaluated in ten individuals per treatment sixteen months after planting. Although the substrate has low nutrient content, yet high metal concentrations, all plants survived. Plants growing on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bauxite; Canga; Leguminosae; Recovery of degraded areas; Rock outcrops; Topsoil.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200232
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Host preference of the hemiparasite Struthanthus flexicaulis (Loranthaceae) in ironstone outcrop plant communities, southeast Brazil Acta Botanica
Mourão,Fabiana Alves; Pinheiro,Rafael Barros Pereira; Jacobi,Claudia Maria; Figueira,José Eugênio Côrtes.
Struthanthus flexicaulis is a hemiparasite abundant in ironstone outcrops in southeast Brazil. We evaluated its host preference among species of the plant community, taking into account the abundance and foliage cover of the hosts. The importance of each species in the community and the mortality caused by the parasite were assessed based on a quantitative survey in 10 strips measuring 1m x 50m. The 10,290 individuals belonged to 42 species. Only 15 had a relative abundance in the plant community greater than 1%, of which 12 showed vestiges of parasitism. More than 80% of deaths in the community were associated with parasitism. Non-infected individuals had significantly less mortality rates (7%) than those infected (83%) (²= 1102.4, df = 1, p < 0.001)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canga; Iron Quadrangle; Ironstone outcrop; Plant-plant interaction; Parasitism.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100041
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Litterfall dynamics in a iron-rich rock outcrop complex in the southeastern portion of the Iron Quadrangle of Brazil Acta Botanica
Valim,Eduardo André Ribeiro; Nalini Jr,Hermínio Arias; Kozovits,Alessandra Rodrigues.
Ecosystems on cangas (duricrust) present considerable heterogeneity of habitats due to microtopographic variations, soil accumulation and a variety of plant functional groups. Therefore, spatial and temporal ecosystem processes such as litterfall are to be expected to be large, and the absence of a level of productivity represents all the facets of iron-rich landscapes. We investigated litterfall in a iron-rich rock complex in the Iron Quadrangle of Brazil, with habitats formed on different evolutionary stages of the soil, resulting in a gradient of biomass, canopy cover and community structure. The measurements were made in open field areas, dominated by herb-shrub vegetation and interspersed with islands of dense vegetation in which there were individual...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canga; Iron duricrust; Ferruginous fields; Litter production; Ecosystem productivity.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200005
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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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Soil-vegetation relationships on a banded ironstone 'island', Carajás Plateau, Brazilian Eastern Amazonia Anais da ABC (AABC)
Nunes,Jaquelina A.; Schaefer,Carlos E.G.R.; Ferreira Júnior,Walnir G.; Neri,Andreza V.; Correa,Guilherme R.; Enright,Neal J..
Vegetation and soil properties of an iron-rich canga (laterite) island on the largest outcrop of banded-iron formation in Serra de Carajás (eastern Amazonia, Brazil) were studied along a topographic gradient (738-762 m asl), and analyzed to test the hypothesis that soil chemical and physical attributes play a key role in the structure and floristic composition of these plant communities. Soil and vegetation were sampled in eight replicate plots within each of the four vegetation types. Surface (0-10 cm) soil samples from each plot were analyzed for basic cations, N, P and plant species density for all species was recorded. CCA ordination analysis showed a strong separation between forest and non-forest sites on the first axis, and between herbaceous and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon Forest; Canga; Carajás; Ferruginous campo rupestre; Iron formation; Laterite.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502097
Registros recuperados: 10
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