| seed dissemination by frugivorous birds from forest fragments to adjacent pastures on the western slope of volcán barva, costa rica. | logging, cattle raising, and agricultural activities have caused the destruction of most forested areas in costa rica. in some middle and highlands the abrupt topography delayed the complete destruction of montane forest. consequently, some fragments of almost pristine forest remain along streams that run in deep canyons. frequently, these remnants serve as corridors between larger forested areas and as routes for movement of frugivorous birds. eighteen bird species, e.g., turdus plebejus, elaen ... | 2002 | 12298287 |