Inventario de los árboles en tres parcelas de bosque primario en la Serranía de Marimonos, Alto Beni
Abstract
En el bosque submontano húmedo de la Serranía Marimonos, Alto Beni, en los Yungas de Bolivia, a una altura entre 600 y 750 m, se realizaron tres inventarios de los árboles en parcelas de una hectárea, considerando los árboles con diámetro a la altura del pecho del tronco (DAP) igual o mayor a 10 cm. En base a mediciones del DAP, número de árboles por especie y su frecuencia, se calcularon los Valores de Importancia de las especies (VI) y familias (VIF). Según estimaciones de la altura de los árboles se da una descripción de la estructura del bosque. Se encontró un total de 1590 árboles, perteneciendo a 209 especies, entre ellas algunas todavía incompletamente determinadas. Las tres parcelas comparten 42 especies en común. Las especies con VI medios más altos son Iriartea deltoidea, Poulsenia armata, Pseudolmedia laevis, Otoba parvifolia y Leonia racemosa. De las 53 familias a las que pertenecen las especies, están como más importantes las Moraceae, seguidas con bastante distancia por Palmae, Leguminosae s.l., Sapotaceae, Lauraceae, Meliaceae y Euphorbiaceae. Estas siete familias representan el 52% del total de los Valores de Importancia de las familias (VIF). La distribución de las alturas de los árboles muestra un intervalo amplio entre 8 y 20 m de altura para la mayoría de los árboles y un número mucho menor de árboles del dosel discontinuo con alturas de 30 a 40 m.
An inventory of the trees with dbh (diameter at breast hight) of 10 cm or more were conducted in three 1 -ha-plots of moist submontane forest (Serranía Marimonos, Alto Beni), in the Yungas of Bolivia, at an altitude between 600 and 750 m. Based on the dbh, number of individuals per species, and frequency, the importance value of species (VI) and of families (VIF) were calculated. Based on estimates of the height, a description of the structure of the forest is given. A total of 1590 trees representing 209 species, some of them not yet completely identified, were recorded. Three plots share 42 species in common. The species with highest mean VI are Iriartea deltoidea, Poulsenia armata, Pseudolmedia laevis, Otoba parvifolia and Leonia racemosa. The most important of the 53 families to which the species belong are Moraceae by a wide margin, followed by Leguminosae s.l., Sapotaceae, Lauraceae, Meliaceae, and Euphorbiaceae. These seven families represent 52% of VIF.The distribution of heights shows the major part of the trees with 8 to 20 m and a much smaller number of trees forming an discontinue canopy with heights of 30-40 m.
An inventory of the trees with dbh (diameter at breast hight) of 10 cm or more were conducted in three 1 -ha-plots of moist submontane forest (Serranía Marimonos, Alto Beni), in the Yungas of Bolivia, at an altitude between 600 and 750 m. Based on the dbh, number of individuals per species, and frequency, the importance value of species (VI) and of families (VIF) were calculated. Based on estimates of the height, a description of the structure of the forest is given. A total of 1590 trees representing 209 species, some of them not yet completely identified, were recorded. Three plots share 42 species in common. The species with highest mean VI are Iriartea deltoidea, Poulsenia armata, Pseudolmedia laevis, Otoba parvifolia and Leonia racemosa. The most important of the 53 families to which the species belong are Moraceae by a wide margin, followed by Leguminosae s.l., Sapotaceae, Lauraceae, Meliaceae, and Euphorbiaceae. These seven families represent 52% of VIF.The distribution of heights shows the major part of the trees with 8 to 20 m and a much smaller number of trees forming an discontinue canopy with heights of 30-40 m.
Description
No. 25