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Projects

 
Estructura y composición florística del bosque seco
semideciduo andino, Parque Nacional y Área Natural
de Manejo Integrado Madidi. La Paz-Bolivia

Leslie Eugenia Cayola Pérez

Resumen

Se instaló una Parcela Permanente de Muestreo de 1 ha en el valle central del Río Tuichi dentro el PN y ANMI Madidi, para conocer la composición florística y estructura del bosque seco semideciduo andino, inventariándose todas las especies leñosas con dap = 10 cm. Se encontraron 681 árboles, 13 cactáceas y 3 lianas, que suman un área basal (AB) de 19.96 m2/ha, presentando una estructura típica de bosques tropicales, al concentrar mayor cantidad de individuos en las clases diamétricas menores, disminuyendo proporcionalmente hacia las clases superiores. En la estructura vertical se observo 4 estratos, siendo el piso inferior el que acumula mayor diversidad de especies y familias, así como mayor cantidad de individuos. Aproximadamente el 50% de lo árboles presentó buena posición y forma de copa, apenas el 12% de los árboles se encontraban infestados por lianas. El bosque es bastante heterogéneo en su composición florística, se registraron 697 individuos, distribuidos en 51 especies, 44 géneros y 24 familias. Las familias más importantes fueron Ulmaceae, Fabaceae y Meliaceae. La familia más diversa fue Fabaceae (10 spp.). Las especies abundantes, dominantes y frecuentes fueron Phyllostylon rhamnoides, Anadenanthera colubrina, Trichilia aff. emarginata, Ximenia americana, Machaerium scleroxylon y Terminalia triflora. Biogeográficamente la flora del área de estudio muestra afinidades con el bosque chiquitano, del sur del departamento de Santa Cruz, así como con bosques similares del piedemonte andino, desde el NW argentino hasta el SE de Brasil.

Palabras clave: Parque Nacional Madidi, bosque seco semideciduo, composición florística, estructura, biogeografía.


Structure and floristic composition of the dry andean
semi-deciduous forest in the National Park and Natural
Area of Integrated Management Madidi, La Paz, Bolivia
Abstract

A Permanent Plot of 1 ha was established in the valley of the Tuichi River inside PN and ANMI Madidi, to gain knowledge of the floristic composition and structure of the Andean semi deciduous dry forest found there. All woody individuals with DBH = 10 cm were inventoried. There were 681 trees, 13 cacti, and 3 lianas, the total basal area was 19.96 m2/ha. The diametrical structure was typical for a tropical forest, where the largest number of individuals is concentrated in the smaller diametrical classes, diminishing proportionally towards the superior classes. The vertical structure was composed of 4 layers; the inferior level accumulates the highest diversity of species and families, as well as the largest amount of individuals. Approximately 50% of the trees had a good crown shape and position; only 12% of the trees were carrying lianas. The forest is quite heterogeneous in its floristic composition, 697 individuals were recorded, distributed in 51 species, 44 genera and 24 families. The most important families were Ulmaceae, Fabaceae, and Meliaceae. The most diverse family was Fabaceae (10 spp.). The most abundant, dominant and frequent species were Phyllostylon rhamnoides, Anadenanthera colubrina, Trichilia aff. emarginata, Ximenia americana, Machaerium scleroxylon, and Terminalia triflora. Bio-geographically the flora of the study area shows affinities with the Chiquitano forest, of the southern part of the department of Santa Cruz, as well as with similar forests of Andean foothills, from NW Argentina to Brazil.

Key words: Madidi National Park, semi-deciduous dry forest, floristic composition, structure, biogeography.

 

 

 
 
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