Consulta: creatorFacets:"Conceição,Abel Augusto"
Registros recuperados: 7
Data/hora: 09/06/2024 06:00:13

Reproductive phenology, pollination and seed dispersal syndromes on sandstone outcrop vegetation in the "Chapada Diamantina", northeastern Brazil: population and community analyses
Provedor de dados: 88
Autores: Conceição,Abel Augusto; Funch,Ligia Silveira; Pirani,José Rubens.
Vegetation on rock outcrops in the "Chapada Diamantina" (soil islands) is often aggregated and surrounded by nude rock surfaces, thus creating natural units with well defined limits. The flowering and fruiting cycles of plants on 58 soil islands at altitudes between 1,100 and 1,140 meters above sea leavel were analyzed at Mãe Inácia Peak (12°27' S and 41°28' W) in the "Chapada Diamantina", Bahia, Brazil. The presence/absence of flowering and fruiting species on each soil island, and their respective cover areas were analyzed at both the population and community levels, and the phenophases of flowering and fruiting were observed during 24 successive months. The analyses of pollination and seed dispersal syndromes indicated that animals are more important in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flowering; Fruiting; Insular sandstone outcrop vegetation; Phenology; Syndromes.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000300012

Floristics, structure and soil of insular vegetation in four quartzite-sandstone outcrops of "Chapada Diamantina", Northeast Brazil
Provedor de dados: 88
Autores: Conceição,Abel Augusto; Pirani,José Rubens; Meirelles,Sergio Tadeu.
Soil islands on rocky surfaces often harbor aggregated vegetation that consists of insular plant communities. These islands are typical of the rocky outcrops and in various parts of Brazil form the so-called "campos rupestres" vegetation. Four of such sites have been selected in the state of Bahia, Northeast Brazil, for this comparative study on floristics and vegetation structure: three areas situated inside the "Parque Nacional da Chapada Diamantina" (Guiné, Fumaça and "Gerais da Fumaça") and one is at the border of the Environmental Protection Area of "Marimbus-Iraquara" ("Mãe Inácia"). All occurring vegetation islands were studied in four random plots of 10 × 10 m per site. Soil was often shallow, sandy and acidic. Vascular plant species were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floristics; Rocky outcrops; Soil islands on rocks; Vegetation islands; Vegetation structure.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000400009

Campo rupestre recém-queimado na Chapada Diamantina, Bahia, Brasil: plantas de rebrota e sementes, com espécies endêmicas na rocha
Provedor de dados: 39
Autores: Neves,Sâmia Paula Santos; Conceição,Abel Augusto.
O fogo é um distúrbio recorrente em muitas áreas da Chapada Diamantina, geralmente originado por ação antrópica e que ocasiona rápidas mudanças nas comunidades. Este trabalho objetiva conhecer a composição e estrutura da vegetação de uma área de campo rupestre recém-queimada no Parque Nacional da Chapada Diamantina, Bahia, Brasil, situada entre 700 e 800 m acima do nível do mar, visando discussão das estratégias de regeneração das espécies mais conspícuas e das similaridades florísticas entre áreas com e sem distúrbio recente de fogo. Foi realizado um censo das espécies de plantas vasculares ocorrentes em 16 parcelas de 10x10 m, sendo as coberturas estimadas em cinco subparcelas de 2x2 m de cada parcela. Foram encontradas 85 espécies de 34 famílias, sendo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Distúrbio; Diversidade; Estrutura; Florística e fogo.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000300013

Massive post-fire flowering events in a tropical mountain region of Brazil: high episodic supply of floral resources
Provedor de dados: 39
Autores: Conceição,Abel Augusto; Alencar,Thiago Gondim; Souza,Jumara Marques; Moura,Alan Daniel Cerqueira; Silva,Gabriela Almeida.
The species Vellozia sincorana L.B.Sm. &amp;amp; Ayensu is key to biodiversity conservation in the tropical mountain region of Brazil. The massive post-fire flowering of this endemic species provides a large, episodic supply of floral resources, mostly nectar, to animals.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity conservation; Chapada Diamantina; Nectar; Rocky grasslands; Vellozia sincorana.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400025

The role of temporal scale in linear edge effects on a submontane Atlantic forest arboreal community
Provedor de dados: 39
Autores: Couto-Santos,Ana Paula Lima do; Conceição,Abel Augusto; Funch,Ligia Silveira.
This study aims to detect the composition, abundance patterns, and successional stage distributions exhibited by arboreal species inside and at the linear edge of a submontane seasonal forest in the Chapada Diamantina (12°28'31'S, 41°23'14'W), Bahia, Brazil. The individual plants with breast height diameters ≥5 cm were sampled in 30 quadrats (10 m × 10 m), 15 in the forest edge and 15 inside the forest. Species were classified according to successional category. Phytosociological and diversity indices were calculated. Shannon indices were compared using Hutcheson's t-test, and the remaining parameters were analyzed by ANOVA. Linear edges exerted a high impact on the floristic composition, diversity, and abundance of species, though little interference was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chapada Diamantina; Diversity; Forest fragmentation; Successional categories; Vegetation structure.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200190

Ilhas de vegetação em afloramentos de quartzito-arenito no Morro do Pai Inácio, Chapada Diamantina, Bahia, Brasil
Provedor de dados: 39
Autores: Conceição,Abel Augusto; Giulietti,Ana Maria; Meirelles,Sérgio Tadeu.
Ilhas de vegetação rodeadas de superfície rochosa foram estudadas em dois platôs do Morro do Pai Inácio (41°28'W e 12°27'S), na Chapada Diamantina. Tais platôs possuem afloramentos de quartzito-arenito entremeados por solos arenosos e ácidos, situados nas porções mais elevadas do Morro, entre 1.100 e 1.170 m acima do nível do mar, sob clima com estação seca bem definida. As ilhas foram assumidas como agrupamentos de uma ou mais espécies de plantas vasculares limitados pela superfície rochosa sem plantas vasculares em toda borda. O estudo incluiu 39 ilhas de vegetação de diferentes tamanhos em cada platô, onde predominaram ervas e arbustos de 63 espécies, sendo 22 comuns a ambos os platôs. Espécies de Liliopsida foram mais numerosas, freqüentes e...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Campo rupestre; Fitossociologia; Afloramento rochoso; Inselberg; Ilha de vegetação.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000200008

Post-fire flowering and fruiting in Vellozia sincorana, a caulescent rosette plant endemic to Northeast Brazil
Provedor de dados: 39
Autores: Conceição,Abel Augusto; Orr,Barron J.
Vellozia sincorana L.B. Sm. &amp;amp; Ayensu, an endemic of campos rupestres, is an endangered species collected by local people to start cooking fires due to the flammability of its resinous stems. A massive flowering of V. sincorana following a wildfire in October 1999 raised some questions: Does fire affect flowering and fruiting of V. sincorana? Is the height of individuals correlated with flowering and fruit production? A wildfire event on 8 November 2008 provided an opportunity to explore these questions. Two populations of V. sincorana in two campos rupestres sites (12º31'S - 41º29'W; 12º36'S - 41º28'W) on ridgetops in the Chapada Diamantina National Park (Brazil) were monitored, one burned in the November 2008 fire and the other unburned since the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chapada Diamantina; Phenology; Rupestrian fields; Useful plant; Velloziaceae.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000100011