Distribuição dos diâmetros dos troncos das espécies mais importantes do cerrado na Estação Florestal de Experimentação de Paraopeba (EFLEX) - MG

Júnior, Manoel Cláudio da Silva; Silva, Alexandre Francisco da

doi:10.1590/s0102-33061988000100006

Cited by 20 publications

(11 citation statements)

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“…The greater density of smaller trees recorded in the RC indicates that this community had yet to reach a mature stage of regeneration, even after 36 years of recuperation. A similar pattern was observed in a cerrado sensu stricto community 30 years after clear-cutting SILVA, 1988).…”

Section: Discussionsupporting

confidence: 81%

Resilience of savanna forest after clear-cutting in the cerrado-amazon transition zone

et al. 2015

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ABSTRACT:The dynamics of the natural process of recuperation of the structure and diversity of native vegetation following anthropogenic disturbance has been the subject of a great deal of controversy in restoration ecology research. The present study evaluates the natural regeneration of savanna forest (cerradão) 32 and 36 years after the clearcutting of the vegetation. We compared species diversity, and the structure and dynamics of the vegetation in two communities, one representing preserved cerradão (PC), and the other, the regenerating cerradão (RC), which was clearcut in 1976. Surveys were conducted in 2008 and 2012, 32 and 36 years after clear-cutting, respectively. In 2008, we demarcated 81 permanent 10 m x 10 m plots, 50 in the RC and 31 in the PC, and measured all live plants with a diameter at soil level > 5 cm. In 2012, the plots were resampled, including the original plants and all the recruits. The species were classified as specialists in savanna (SA) or forest habitat (FO), or as generalists (SA/FO). The RC presented the highest species richness and diversity, density, annual increment, and mortality rates. However, no significant differences were found between communities in the distribution of specialist or generalist species, or between years (2008 and 2012) in basal area or recruitment rates. While the species composition of the two communities is highly similar, the RC was characterized by a higher frequency of SA species, and was more similar to nearby savanna communities (cerrado sensu stricto). Trees in the RC were smaller and suffered higher rates of mortality than those in the PC, but also higher annual increments. While the RC demonstrated a high degree of resilience following clear-cutting, it was still found to be at an intermediate stage of succession, even after almost four decades, indicating that regeneration is a slow process.

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Section: Discussionsupporting

confidence: 81%

Resilience of savanna forest after clear-cutting in the cerrado-amazon transition zone

et al. 2015

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“…Distribuição diamétrica -o resultado obtido a partir da distribuição de freqüência nas classes diamétricas, de todos os indivíduos amostrados (Fig. 1), é o esperado para as florestas ineqüiâneas secundárias, apresentando-se a curva na forma de um "J" invertido (Silva Júnior & Silva 1988). A curva resultante indica que existe um decréscimo acentuado no número de indivíduos, no sentido das menores para as maiores classes diamétricas.…”

Section: Resultsunclassified

Estrutura fitossocióloga de um trecho de vegetação arbórea no Parque Estadual do Rio Doce - Minas Gerais , Brasil

et al. 2002

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RESUMO -(Estrutura fitossociológica de um trecho de vegetação arbórea no Parque Estadual do Rio Doce -Minas Gerais, BrasilO tamanho das populações e sua distribuição pelo ambiente foram os fatores decisivos para o destaque apresentado por essas espécies, com exceção de P. contorta, que esteve representada por poucos indivíduos, contudo de grandes dimensões. As distribuições diamétricas e de alturas evidenciaram poucos indivíduos de grande porte, fato que aliado ao histórico do local, que registra um incêndio em 1967, e à baixa ocorrência de espécies associadas a ambientes climácicos, sugere que o trecho de floresta estudado encontra-se em estádio médio de sucessão secundária. . In order to sample the tree component, the point-centered-quarter method was employed according to two different protocols: in one including the dead individuals, and in the other excluding them. A total of 200 sampling points were allocated in 20 parallel lines, along a hillside. A total of 143 species, belonging to 109 recognized genera and 38 botanical families was found. The main species were Bixa arborea, Guatteria schomburgkiana, Joannesia princeps, Aparisthmium cordatum, Pseudopiptadenia contorta and Carpotroche brasiliensis. The size of the populations and their distribution throughout the environment determined the prominence of these species, with the exception of P. contorta, which was represented by few large individuals. The diameter and height distributions evidenced few individuals of great size, a fact probably linked to a history of burning a 1967. The fire history and the low occurrence of climax species suggest that the forest stand studied is in a medium stage of secondary succession. Palavras-chave -

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“…However, in the case of cerrado, it must also be considered that some species present short adults, which is their maximum genetic potential expression (Silva Junior & Silva 1988).…”

Section: Discussionmentioning

confidence: 99%

Community structure and comparative analysis of the woody component of a cerrado remnant in Southeastern Brazil

Ishara

Maimoni-Rodella

2010

Hoehnea

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-(Community structure and comparative analysis of the woody component of a cerrado remnant in Southeastern Brazil). The aims of the present work were to carry out a floristic-structural study of the shrubby-arboreal component of a savanna fragment (cerrado sensu stricto) in São Paulo State, Southeastern Brazil, and to compare with other areas. Twentyone plots of 250 m² each were delimited and plants with stem basal diameter equal or superior to 3 cm were included in the sampling. The recorded individuals corresponded to 3,062 and 58 species belonging to 34 families were registered. Asteraceae had the largest number of species (seven), followed by Fabaceae and Myrtaceae (five each). The most important species were Tibouchina stenocarpa and Anadenanthera falcata. The floristic composition of the study area indicates that it might be considered a transition from cerrado to seasonal semi-deciduous forest. The comparison with other surveys indicates floristic-structural heterogeneity of these cerrado areas and the multivariate analysis showed that areas grouped according to their geographical position and soil type. Key words: phytosociology, savanna, similarity RESUMO -(Estrutura da comunidade e análises comparativas do componente lenhoso de um remanescente de cerrado na região Sudeste do Brasil). O presente estudo teve como objetivo realizar um levantamento florístico-estrutural da comunidade arbustivo-arbórea de um fragmento de cerrado sensu stricto no Estado de São Paulo e compará-lo com outras áreas de cerrado. Foram delimitadas 21 parcelas de 250 m 2 cada onde as plantas com diâmetro basal do caule igual ou superior a 3 cm foram incluídas na amostragem. Foram registrados 3062 indivíduos pertencentes a 58 espécies e 34 famílias. Asteraceae apresentou o maior número de espécies (sete), seguida por Fabaceae e Myrtaceae (cinco cada). As espécies mais importantes foram Tibouchina stenocarpa e Anadenanthera falcata. A composição florística da área de estudo indica que esta pode ser considerada como uma transição entre cerrado e floresta estacional semidecídua. A comparação com outras áreas indicou que há considerável heterogeneidade florístico-estrutural nas áreas de cerrado e as análises multivariadas mostraram que as áreas comparadas se agruparam de acordo com sua posição geográfica e tipo de solo.

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Distribuição dos diâmetros dos troncos das espécies mais importantes do cerrado na Estação Florestal de Experimentação de Paraopeba (EFLEX) - MG

Cited by 20 publications

References 1 publication

Resilience of savanna forest after clear-cutting in the cerrado-amazon transition zone

Resilience of savanna forest after clear-cutting in the cerrado-amazon transition zone

Estrutura fitossocióloga de um trecho de vegetação arbórea no Parque Estadual do Rio Doce - Minas Gerais , Brasil

Community structure and comparative analysis of the woody component of a cerrado remnant in Southeastern Brazil

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