Characterization of the submontane open Ombrosphilal Forest in Rebio Guaporé, Western Amazon, Brazil
DOI:
https://doi.org/10.6008/CBPC2318-2881.2021.003.0015Keywords:
Phytosociological survey, Ecological groups, Diversity index, Evenness index, Conservation unitAbstract
Phytosociological knowledge is used in planning the preservation, conservation, recovery and management of natural resources. The objective was to carry out a floristic and phytosociological survey in Rebio Guaporé, RO. Conducted in ten permanent plots (2500 m2), specimens with DBH ≥ 10.0 cm were identified and measured, classifying them into ecological groups, and calculating the horizontal and vertical structures, Shannon-Wiener diversity indices (H') and Pielou's evenness (J'). The area had 1354 specimens distributed in 30 botanical families, 75 genera and 90 species. It presented a varied successional stage, comprising 26.67% pioneer species, 25.56% early secondary, 23.33% late secondary and 24.44% climax. The importance value indices ranged from 0.16 to 13.37% of the total value, diversity index H' was 3.36, and J' was 0.75. The vertical structure followed the order medium > superior > inferior with 74, 46 and 43 species, respectively. The species Couratari stellata, Theobroma speciosum, Mezilourus itauba and Atrocaryum aculatissimum were found in all areas evaluated, with emphasis on Pseudolmedia multinervis with the highest absolute density (94.8 ind. ha-1). Therefore, further studies of the vegetation of the Rebio Guaporé are recommended, in order to better understand these isolated and protected riches in the enormous Amazonian biodiversity.
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