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The aim of this work was to determine the phytosociological and floristic diversity of the shrub-tree layer of three areas of stricto sensu cerrado. This study was conducted in the city of Gurupi -TO, at the UFT Experimental Farm, Campus of Gurupi, UTM coordinates 11 "46'25 S and 49" 02'54 W and in the city of Aliança do Tocantins -TO on private property Fazenda Nossa Lady Aparecida under its UTM coordinates 11 "46'25 S and 49"02'54 W. Three 20x50m plots were systematically installed in each area, 20m apart from each other, for a total of 3000 m², or 0.3 ha sampling area. Every shrub and individual tree with circumference at breast height (CAP) ≥ 10 cm was sampled. In the three cerrado fragments evaluated, a total of 138 species, 43 families and 94 genera were found and the distribution between the evaluated areas was as follows. In A1 77 species were sampled, 32 families and 61 genera, in A2 85 species, 37 families and 68 genera were found, and A3 the distribution took place with a totalof 67 species, 29 families and 55 genera. The Shannon diversity index (H' = 3.55 3.52 and3.70) and Pielou evenness DOI: http://dx.doi.org/10.20873/uft.2359-3652.2017v4n2p69Revista Desafios –v. 04,n. 02, 201770(J' = 0.81 0.79 and 0.87) respectively demonstrated high richness and diversity in all areas, showing great environmental heterogeneity and low ecological dominance. |
