BEHAVIOR OF THE DIAMETRIC DISTRIBUTION OF ECOLOGICAL GROUPS IN A MIXED OMBROPHILOUS FOREST FRAGMENT

Thiago Wendling Gonçalves De Oliveira,Rafael Schmitz,Jorge Danilo Zea Camaño,Ana Paula Dalla Corte,Carlos Roberto Sanquetta

doi:10.5380/rf.v48i3.56466

Thiago Wendling Gonçalves De Oliveira, Rafael Schmitz + Show 3 more

Open Access

https://doi.org/10.5380/rf.v48i3.56466

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Journal: FLORESTA	Publication Date: Jun 14, 2018
Citations: 2	License type: cc-by

Affiliation: Federal University of Paraná

Abstract

The Mixed Ombrophilous Forest is one of the most threatened ecosystems in Brazil. It is thus necessary to understand its dynamics of growth over time so that sustainable use and conservation management strategies be proposed. The objective of this study is to evaluate the behavior of the diametric distribution of two pioneer and non-pioneer ecological groups in a fragment of Mixed Ombrophilous Forest considering four years of evaluations: from 2002 to 2017. Exponential, Gamma, Weber and Weibull 3P density probability functions were adjusted. The diametric behavior of the forest and the ecological groups analyzed remained negative exponentially, being a characteristic of natural forests. The distributions that best adjusted were Weibull 3P for the forest as a whole and for the group of pioneers, and Weber for non-pioneers. We concluded that ecological groups have the same pattern of diametric distribution as the forest as a whole. However, different forest management strategies are necessary considering the intrinsic characteristics of each group.

Highlights

The Mixed Ombrophilous Forest (MOF) is a forest typology in the South and Southeastern regions of Brazil
In view of the above, the hypothesis of this study is that the diametrical distribution of each ecological group presents a different behavior from the forest as a whole. Aiming to answer this hypothesis and provide information that can be applied to a sustainable management of the forest, the objective of this study is to verify the behavior of the diametric distribution over time in a Mixed Ombrophilous Forest fragment by adjusting probabilistic distribution functions taking into account different ecological groups
The highest Daps were from non-pioneer trees; the greater growth and longevity of individuals are characteristic of this ecological group

Summary

Introduction

The Mixed Ombrophilous Forest (MOF) is a forest typology in the South and Southeastern regions of Brazil. It presents a great tree diversity distributed in different ecological groups. It is necessary to understand its growth dynamics so that management strategies, whether for sustainable use or conservation, can be proposed In this context, growth studies involving modeling diametric distribution, growth and dynamics of ecological groups of naturally occurring species are essential for a sustainable forest management. Growth studies involving modeling diametric distribution, growth and dynamics of ecological groups of naturally occurring species are essential for a sustainable forest management Such studies contribute to increase knowledge on the processes of entry and mortality of forests, such as the maintenance of commercially important species (MACIEL et al, 2003). Diametric distribution analyses allow growth stocks and forest structure to be evaluated by ecological groups or by species (MACHADO et al, 2017), and it is necessary to use mathematical models capable of describing the behavior of the forest over evaluation years

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