Incremento, ingresso e mortalidade em uma floresta de contato ombrófila aberta/estacional em Marcelândia, Estado do Mato Grosso

Abstract

RESUMOEsta pesquisa teve por objetivo estudar o incremento em diâmetro, área basal e volume, o ingresso e a mortalidade de uma floresta ombrófila aberta/estacional no município de Marcelândia. were evaluated. The entry was determined by the trees that have reached or exceeded a diameter of 17 cm. Mortality was calculated as the sum of all found dead trees in each measurement with a diameter equal or more than 17 cm. In the considered period of six years, the results to the increase in diameter, basal area, and volume were respectively, 0.34 cm, 0.22 m².ha -1 , and 2.11 m³.ha -1 . The average values for the mortality rates and entry respectively were 0.78% and 0.30%.

Post-fire recovery of a dense ombrophylous forest in Amazon

“…This value was divided by the number of years of the interval between measurements to obtain the number of recruits per hectare per year. From this value the annual percentage of recruits was calculated by the relation between the number of new trees in each measurement and the number of trees present in the previous measurement (Colpini et al 2010).…”

Natural re generation in tropical forests

“…Any consistent method of evaluation will produce a dynamic balance between mortality and recruitment when a sufficiently long period of time is considered (Sheil & May, 1996). Obviously, in practice, seasonal imbalances are expected and verified (Colpini et al, 2010;Santos & Jardim, 2012;Viana & Jardim, 2013;Sundarapandian;Swamy, 2013), but in the long term the assumption of Sheil & May (1996) should be confirmed.…”

“…The scientific literature (Silva & Araújo, 2009;Colpini et al, 2010) considers the terms ingress and recruitment to be synonymous, defining them as the input of a new individual within the limits defined for inclusion in the sampling process, compared to those that were already present in the previous measurement. However, this new individual may belong to a species already represented in the area in the first sample measured or a new species in the sample.…”

“…Other approaches consider the direct ratio between the number of recruits and density before the study commencement (Condit et al, 1995;Colpini et al, 2010;Souza et al, 2012). Regarding the recruitment of individuals of a species present at baseline, all of the above methods may be used.…”

“…Regarding the recruitment of individuals of a species present at baseline, all of the above methods may be used. However, regarding the ingress of a new species in the community, in which the initial density of the species is nil, some of these approaches, such as those based on the ratio between the number of recruits and the initial density of the species (Condit et al, 1995;Sheil & May, 1996;Colpini et al, 2010;Souza et al, 2012) or the model…”