Avian Abundance in Sun and Shade Coffee Plantations and Remnant Pine Forest inthe Cordillera Central, Dominican Republic

摘要

Point counts and mist nets were used to sample birds in sun and shade coffeeplantations, and remnant pine forests in an agricultural region of the Cordillera Central, Dominican Republic from Jan.-Feb. 1992 to 1994. Rarefraction analysis indicated that species richness was highest in pine and lowest in plantations. Species diversity (H') was similar in point counts in the three habitats, but an 'overdominance' was evident in net samples in shade coffee where the two most common species constituted 51% of all captures in contrast to 37% in pine and 27% in sun coffee. Pine forest had more habitat specialists and endemics (relative to coffee), and an abundance of insectiovores.