EFEITO DA EXPLORAÇÃO DE IMPACTO REDUZIDO EM ALGUMAS ESPÉCIES DE SAPOTACEAE NO LESTE DA AMAZÔNIA

800x600 Avaliou-se o efeito da exploracao de madeira, realizada em 1997, na estrutura e dinâmica de algumas especies de Sapotaceae em uma Floresta Ombrofila Densa, no municipio de Moju, Para (02o12’26”S e 48o48’14”W). De uma area de floresta de 1.050 ha, foram selecionados 200 hapara exploracao seletiva de intensidade de 23 m 3 .ha -1 . Nessa area, foram alocadas 22 parcelas permanentes de 0,5 ha, totalizando 11 ha amostrais, onde foram medidas todas as arvores com DAP ≥10 cm, nos anos de 1995 (antes da exploracao), 1998 e 2010 (apos exploracao). Os parâmetros avaliados foram densidade (Da) e area basal (m 2 .ha -1 ). No periodo de 1995 a 2010, Sapotaceae apresentou uma reducao significativa de 7,7% na densidade (p = 0,0147) e aumento na dominância em 1,4% (p = 0,7851). Nesse mesmo periodo, observou-se reducao da densidade e dominância para Pouteria laurifolia (Gomes) Radlk. (66,7 e 50,6%), Pouteria macrocarpa (Mart.) D. Dietr. (25 e 29,4%), Micropholis acutangula (Ducke) Eyma (20 e 11%), Manilkara huberi (Ducke) A. Chev. (16,4 e 17,7%) e Manilkara paraensis (Huber) Standl. (12,5 e 31,4%). A especie com maior valor comercial, M. huberi , nao mostrou recuperacao nesse parâmetro, porem houve ingresso de tres novas especies na populacao de Sapotaceae estudada. Abstract Effect of reduced impact logging in some sapotaceae species in the eastern amazon . Effect of logging, held in 1997, on structure and dynamics of some Sapotaceae species were evaluated in a dense tropical rain forest located in the municipality of Moju, Para (02o 12’ 26” S e 48o 48’ 14” W). Two hundred ha out of 1,050 ha forest area were selectively logged for timber (23 m 3 ha -1 logging intensity) in 1997.Twenty-two 0.5 ha permanent sample plots (11 ha sample) were established and all trees with dbh ≥ 10 cm were identified and measured for dbh in 1995 (before logging), 1998 and 2010 (after logging). Parameters evaluated were Density (De) and Basal area (G-m 2 ha -1 ). Sapotaceae presented a significant reduction of 7.7% on tree density (p=0.0147), and an dominance increase of 1.4% (p=0.7851). In the same period, decreases in density and basal area were observed to Pouteria laurifolia (Gomes) Radlk. (66.7 and 50.6%), Pouteria macrocarpa (Mart.) D. Dietr. (25 and 29.4%), Micropholis acutangula (Ducke) Eyma (20 and 11%), Manilkara huberi (Ducke) A. Chev. (16.4 and 17.7%) and Manilkara paraensis (Huber) Standl. (12.5 and 31.4%). The main commercial species M. Huberi did not recover its original density. On the other hand, three new species of the family were recorded in the focused period. Keywords : Forest management; Pouteria ; Manilkara ; Amazonian Forest. Normal 0 21 false false false PT-BR X-NONE X-NONE MicrosoftInternetExplorer4 st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif";}