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Availability And Use Of Food Resources By Two Species Of Automolus (Aves, Furnariidae), Grace Patricia Servat-Valenzuela
Availability And Use Of Food Resources By Two Species Of Automolus (Aves, Furnariidae), Grace Patricia Servat-Valenzuela
Theses
Foraging specialization is one mechanism that has been hypothesized to promote species coexistence and, thus, higher bird species diversity in tropical forests. Dead-leaves suspended in vegetation above the forest floor constitute a focal substrate that may promote specialization (Rosenberg 1990a, b). In a study locality in Amazonia, Remsen and Parker (1984) reported 16 species of birds closely associated with this system. Therefore, it represents a microcosm of high diversity in tropical forests. As such, one natural question is how this substrate can support so many coexisting species, and at what level does specialization occur? In the present study, I address …