Foliage Use by Birds of the Oak-Juniper Woodland and Ponderosa Pine Forest in Southeastern Arizona

摘要: of different ways. Species within the same community may use configurations habitat, or in a manner proportions. This tends to minimize eliminate interspecific competition. Habitat utilization by various species nesting birds is often main portion autecological studies (Stenger and Falls 1959), dealing with interactions few from given avian community. Recent Morse (1967) MacArthur (1958) have shown that volume foliage be an important factor limiting density some birds. However, attempts been made quantify plant trees height distribution this on trees. information can value when correlated total nestingbird use. also showed how five warblers which overlap their exploit feature habitat Emlen has proposed method for obtaining canopy cover recording presence absence above observer at predetermined points. comparative purposes, but neither gives absolute nor shows its ground Both aspects are bird utilization. The objective study depict two communities show avifauna utilizes dimension