Acta Amazonica (Dec 2003)

Análise florística e estrutural de uma floresta em diferentes estágios sucessionais no município de Castanhal, Pará Floristic composition and structure of a forest in different successional stages in Castanhal, Pará

  • Roberta de Fátima Rodrigues Coelho,
  • Daniel Jacob Zarin,
  • Izildinha Souza Miranda,
  • Joanna Marie Tucker

DOI
https://doi.org/10.1590/S0044-59672003000400004
Journal volume & issue
Vol. 33, no. 4
pp. 563 – 582

Abstract

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O objetivo deste trabalho foi estudar a sucessão florestal pela análise florística e estrutural de floresta em três estágios sucessionais (4, 8 e 12 anos), localizadas no município de Castanhal-PA. Consideraram-se duas classes de DAP: Classe I (DAP>1cm) e classe II (DAPThe objective of this study is to understand secondary forest succession through florisitc and structural analysis of a forest in three successional stages (4, 8 and 12 years) located in Castanhal in the state of Pará. This study considers wood species divided into two DBH classes: class I (DBH>1cm) and class II (DBH<1cm). Class I individuals were measured in twelve 10m x 10m plots in the 12-year-old successional forest, and in four 10 x 10 m plots in the 4 and 8-year-old secondary forest stands. Class II individuals were measured in 48 subplots of 1m x 1m in the 12-year-old forest stand, and in 16 subplots in the 4 and 8-year-old forest stands. In Class I, 18, 30 and 73 species were identified; and were found 12, 18 and 21 individuals/ha in the 4, 8 and 12-year-old forests, respectively. In class II, 17, 21 and 62 species were identified; and were found 50, 26 and 47 individuals/m² in the 4, 8 and 12-year-old forests, respectively. For class I, Lacistema pubescens, Vismia guianensis and Myrcia sylvatica demonstrated the greatest abundance and relative dominance. In class II, Lacistema pubescens, Vismia guianensis, Miconia ciliata, Myrcia bracteata and Banara guianensis also displayed an elevated number of individuals. Myrcia sylvatica presented the greatest abundance in the three successional stages. Similarity among plots was approximately 60% for class I and 42% for class II. The results showed the forest with three stages of successional development: initiation phase (4 years), exclusion phase (8 years), and the beginning of the understory reinitiation phase (12 years).

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