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Estructura, composición y variabilidad del bosque subandino
xérico en un sector del valle del Rió Tuichi, Anmi Madidi,
La Paz (Bolivia)
Abstract
We present detailed information on structure and floristic composition of
the xeric subandean forest in a sector of the Tuichi valley, in the Madidi
Natural Area of Integrated Management, La Paz-Bolivia. We evaluated 1.3 has.
of forest where we measured all the woody plants with DBH ≥ 2.5 cm, in
plots of 0.1 ha. A total of 4709 stems with an average of
362.2±132.3/0.1 ha were recorded. The total basal area was of
37.7 m2 with an average of 2.9±1.1 m2/0.1 ha. We recorded
171 species in 50 families, with averages of 48±7.5 species and
24.8±3.8 families per plot. The species of greatest ecological
importance (IVI) were Phyllostylon rhamnoides, Anadenanthera colubrina
and Trichilia aff. emarginata; the families with greatest IVIF
were Fabaceae, Meliaceae and Ulmaceae. A Principal Component Analysis
distinguished two groups of plots or plant communities: a community found
on top and slopes of ridges characterized by Zanthoxylum fagara, Astronium
urundeuva and Erythrina sp; and the other a community found in the
valley bottoms and terraces was characterized by Chrysophyllum gonocarpum,
Randia armata and Gallesia integrifolia. The predominant biogeographic
element is that of species from seasonally dry forests of the
Brazilian–Paranian biogeographyc region, followed by elements of humid
lowland forests and finally Andean elements that concentrate endemism and
characterize this formation.
Key words: Madidi subandean dry forest, structure,
composition, variability, biogeography.
By Alfredo Fuentes Claros1,
Alejandro Araujo Murakami1.
Héctor Cabrera Condarco1.
Freddy Canqui1.
Leslie Cayola1.
Carla Maldonado2 y
Narel Paniagua2
- Missouri Botanical Garden y Herbario Nacional de Bolivia,
Instituto de Ecología, Universidad Mayor de San Andrés, Casilla 10077.
La Paz, Bolivia,
lpb.madidi@acelerate.com.
- Missouri Botanical Garden y Herbario Nacional de Bolivia,
Instituto de Ecología, Universidad Mayor de San Andrés, Casilla 10077.
La Paz, Bolivia; dirección actual: Department of Systematic Botany, Aarhus
University, Nordlandsvej 68. DK-8240 Risskov, Denmark.
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