Análise da fitossociologia de uma área de terra firme no rio Maués Mirim, município de Maués - AM.

Abstract

The objective of this work was to analyze the floristic and structural composition of a dry land forest in the municipality of Maués-AM, in order to better understand the structure of the forests in this region, describing the species sampled and their respective parameters. A 100% forest census was carried out in an area with 2, 595, 1630 ha, with bites every 50 meters with a 36 ° north azimuth, the area presented 105 blocks. All individuals with DAP ≥ 50 cm were inventoried. In the section of sampled forest were found 9,717 individuals, represented by 81 species, distributed in 64 genera and 25 families. The Fabaceae family presented the largest number of species (30), genus (30) and individuals (4,249), followed by the Lauraceae family, with 652 individuals distributed in five genera and seven species. Among the species, the most important were Eperua oleifera (Copaíba alligator), Caryocar glabrum (piquiarana), Tachigali myrmecophia (taxí). The basal area presented 3,906,698 m².ha-¹. The distribution of individuals by diameter classes follows the reverse J pattern, the predominance of individuals occurred in the first and second diameter classes, with 26.44% and 22.96%, respectively. The three species that presented the highest value of CVI were Eperua oleifera 13, 50%, Caryocar glabrum 11, 16%, Tachigali myrmecophia 10, 94%. In relation to IVI, the three most important species were: Eperua oleífera 15, 06%, Caryocar glabrum 12, 73%, Tachigali myrmecophia 12,50%. The arboreal extract was classified in average between 10 and 15 meters, with 59.36% of the individuals. The curve species area stabilized from 988 ha, 96.25% of the species sampled were identified. The diversity obtained by the Shannon index (H ') was 1.64 with an equability (E') of 0.02, indicating low diversity and equability.