La profunda garganta abierta por el río Ayuda en Treviño compone uno de los espacios naturales más bellos y de mayor valor ambiental de Castilla y León. Unas excelentes masas de haya, quejigo, boj y, sobre todo, el milenario bosque de tejos del barranco de Arrola, convierten a la cabecera de este río en una privilegiada reserva natural. La motivación principal para la inclusión de esta zona en la red Natura 2000 es la presencia de poblaciones de Visón europeo (Mustela lutreola). Un señalizado camino que parte del pueblo de Sáseta, y que en todo momento discurre paralelo al curso del río, permite recorrer y disfrutar del patrimonio natural y geológico que atesora el desfiladero.
Localidad:
Albaina
Laño
Pariza
Sáseta
Treviño
Superficie:
426.00 Ha
Tipo de protección:
Red Natura 2000
REN:
Si
Fase de declaración:
Las Riberas del río Ayuda y todos los ríos y arroyos tributarios del mismo en el Condado de Treviño están incluidos en la Red Natura 2000 desde el año 2000
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