Data/hora: 02/06/2024 06:47:53

Provedor de dados: | 36
País: | Brazil
Título: | Growth rate of a terra firme rain forest in Brazilian Amazonia over an eight-year period in response to logging
Autores: | Carvalho,João Olegário Pereira de; Silva,José Natalino Macedo; Lopes,José do Carmo Alves.
Data: | 2004-01-01
Ano: | 2004
Palavras-chave: | Amazonian forest; Tree growth rate; Diameter increment; Forest dynamics; Logging.
Resumo: | This paper deals with growth rates of trees &gt; 5cm dbh over an eight-year period from 257 species at the Tapajós National Forest. The discussion is centred on the behaviour of the forest after logging. Permanent sample plots were established in 1981 and measured at the first time. The area was logged in 1982. Measurements after logging occurred in 1983, 1987 and 1989. Considering all species together, diameter increment was similar for both intensities of logging until five years after logging. Light-demanding species showed significantly higher growth rates than shade-tolerant species in the logged forest, with greater increment in the heavier treatment intensity. Commercial species also had higher growth rates in the heavier logged area, although those were significantly different only in the period from one to five years after logging. In the undisturbed forest, growth rates increased with increasing dbh size. At species level, growth rate varied between and within treatments, as well as between trees within species, depending mainly on degree of canopy opening. The logging favoured the growth of commercial species, chiefly the light-demanders. Therefore, if the same growth conditions continue being given, for example by silvicultural treatments, to those species of commercial interest, the forest would reach a stock available for harvesting around year 30 after logging. However, the high variation in increment rates indicates that an eight-year period is not sufficient to allow predictions on cutting cycles or polycyclic management systems for the study forest.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672004000200009
Editor: | Instituto Nacional de Pesquisas da Amazônia
Relação: | 10.1590/S0044-59672004000200009
Formato: | text/html
Fonte: | Acta Amazonica  v.34 n.2 2004
Fonte: | info:eu-repo/semantics/openAccess