
Bosques de los ríos Yudi y
Erebato, Alto Caura Díaz-Pérez et al.
226
mayor número de especies y área basal fue Fabaceae (28 especies y 7,45 m
2
/ha) y la
de mayor densidad fue Annonaceae (306 ind./ha). Según el IVF las cinco familias
más importantes en ambos sitios fueron Fabaceae, Annonaceae, Burseraceae
Lecythidaceae y Sapotaceae. Las especies con mayor IVI fueron Anaxagorea
breviceps, Eperua jenmanii, Alexa confusa, Micrandra minor y Catostemma
commune en el río Yudi, mientras que para el Erebato resultaron A. breviceps, E.
jenmanii, A. confusa, Campomanesia aromatica y Amphirrhox longifolia.
Palabras clave: Escudo Guayanés, fitosociología, composición florística, bosque
ribereño, ríos Yudi y Erebato, alto Caura, Venezuela.
Floristic and structure of riparian forests in a sector of the Yudi and
Erebato river, Caura river higher basin, Bolívar state, Venezuela
ABSTRACT
On the work related to a project for the study of “big terrestrial vertebrates in
indigenous ancestral lands of the higher Caura”, the floristic and structure of riparian
forests in a sector of the rivers Erebato and Yudi, upper Caura basin, Venezuela were
preliminarily determined. In 42 spots selected to place trap cameras, taking advantage
of hunting paths and routs of big animals, a 20 x 20 m plot was set, 21 in Erebato
and 21 in Yudi. The species (IVI) and family importance (FIV) in each plot were
calculated. A total of 42 families, 111 genera and 149 species were represented in the
1.68 ha of forest. The most species rich family was Leguminosae s.l. (28 species);
followed by Sapotaceae (11), Urticaceae (9) and Lauraceae (8). For both places the
density of stems > 5 cm DBH varied between 942 (Erebato) and 1208 (Yudi), the
number of species from 110 to 132, the genera 84 to 95, the families 38 to 42 and the
basal area between 23.81 and 30.36 m
2
/ha. Fabaceae was the most species rich and
the most dominant in basal area (3.37 m
2
/ha). The most numerous in total stems was
Annonaceae (306 ind./ha). The most conspicuous families include Fabaceae,
Annonaceae, Burseraceae, Lecythidaceae and Sapotaceae in both sites. The species
with more important value in the Yudi river were Anaxagorea breviceps, Eperua
jenmanii, Alexa confusa, Micrandra minor and Catostemma comune, whereas in the