
       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