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vol.24 issue3-4Quantitative and Comparative Studies on lhe Floristics of a Wood Vegetation in lhe Saeavém Forest Reserve - São Luís, State of Maranhão (Brazil)Mass and Energy Exchange Betwenn Natural Sungaces and the Atmosphere author indexsubject indexarticles search
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Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392


MUNIZ, Francisca Helena; CESAR, Oswaldo  and  MONTEIRO, Reinaldo. Phytosociology of a woody vegetation in the Sacavém Forest Reserve - São Luis. State of Maranhão(Brazil). Acta Amaz. [online]. 1994, vol.24, n.3-4, pp.219-235. ISSN 0044-5967.

A phytosociological study was carried out in 0.5 ha of remaining patches of 'Pre-Ama-zonian' humid tropical forest within the Sacavém Forest Reserve, located in the municipality of São Luís, state of Maranhão, Brazil (2° 32'S; 44° 17'W). The total area comprised of fifty 10x10 m quadrats in which 410 trees with a minimum perimeter at breast height (PBH) of 15 cm were sampled, including 5 dead individuals. There were found 110 species of 66 genera in 34 families. The DBH varied between 4.8 cm and 86.7 cm, with an average of 16.28 cm. The minimum, mean and maximum heights were 2.0 m, 11.16m and 25.0 m, respectively. The total basal area was 14.207 m2 or 28.4140 rrrVha with an average of 0,07 m2/tree; the absolute density was 820 trees/ha. The five most importante families in IVI were Leguminosae, Chrysobalanaceae, Meliaceae, Myrtaceae and Arecaceae, making up 49.24% of the total. The five most important species in IVI were Licaniacf. incana Aubl., Guaina guidonia (L.) Sleumer, Copaifera langsdorffiiDesf., Dipteryx lacuniferaDucke and one morpho-species (Unknown 1 ). As much as 60% of the species had only one or two individuals. The Shannon & Weaver diversity index (Η') was 4.189. Although the area studied is comparatively small, several comparisons made with surveys for other Amazonian forest locations led to the conclusion that the Sacavém Reserve has similar richness, density and dominance.

Keywords : Phytosociology; 'Pre-Amazonian' forest; Sacavém Forest Reserve (São Luís, Maranhão).

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