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COMPOSITION AND SHRED OF FLORISTIC PHYTOSOCIOLOGICAL FOREST IN SOUTHWEST OF THE AMAZON

In order to carry out the floristic and phytosociological study of tree layer of said fragment. Were allocated four plots of 20 x 125 m, where we analyzed the floristic composition, individuals with DAP ? 10 cm. Within the plots studied, 306 individuals were identified, classified into 39 species, 30 genera and 17 botanical families. The families with the greatest species richness were Mimosaceae, Arecaceae, Cecropiaceae and Melastomataceae. In number of individuals stood out the Cecropiaceae families, Melastomataceae, Malpighiaceae, Annonaceae and Lauraceae. The genres that had higher species richness were: Inga, Porouma, Miconia, Bellucia, Byrsonima and Ocotea. The genera with the largest number of individuals were Pourouma, Miconia, Byrsonima, Ocotea and Inga. Species that added the largest number of individuals were Pourouma cecropiifolia Mart, Miconia sp.1, Byrsonima sp.1, Guatteria sp., Inga alba (Sw.) Willd. and Euterpe precatoria M. The index of Shannon-Wiener (H') was found to be 3,11 and the evenness (J) 0,84. The species with the highest Importance Value Index (IVI) were: Pourouma cecropiifolia Mart, Byrsonima sp1, Miconia sp1, Hevea guianensis Aubl, and Guatteria sp. The total density of the sampled area was 306 ind.ha¹ and the basal area was 21, 26 m². ha¹. The floristic composition of the study area proved to be consistent with the results of other studies conducted in secondary forests in the Amazon, which are present in most species of the group of pioneers.



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Keywords: Population growth; Deforestation; Diversity; Secondary forest;

ISSN: 18090583

EISSN: 23172606


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