Accession Number : AD0728486

Title :   Ecology of a Tropical Delta Forest Environment. V. Diversity and Abundance Patterns of Lower Amazonian Rain Forest Birds.

Descriptive Note : Final rept. Jan 66-Jun 71,

Corporate Author : SMITHSONIAN INSTITUTION WASHINGTON DC

Personal Author(s) : Lovejoy, Thomas E.

Report Date : JUN 1971

Pagination or Media Count : 218

Abstract : Bird communities in four types of rain forest on the outskirts of Belem, Brazil were studied using capture-recapture data collected from all levels of the forests from 1967 to 1969. During the course of the study about 15,000 bird captures were made. Diversity indices of the data demonstrate these to be some of the most diverse avian communities. Extremes of abundance and rarity seem to decrease in bird communities with increasing numbers of species. Vertical stratification and the presence of between-habitat diversity is demonstrated. The more similar the tree species composition around two groups of nets, the more similar is the species composition of the birds caught in those two groups of nets. Despite the presence of between-habitat diversity, there is considerable overlap in abundant bird species between various forest types. Tropical rain forests and their bird communities have special properties which make generalization from temperate situations difficult. This is shown by the high diversity and low equitability of Belem forest birds, the superiority of tree species composition to foliage height diversity as a predictor of bird species composition, and the high overlap in abundant bird species between forest types.

Descriptors :   *ECOLOGY, *JUNGLES, *TROPICAL REGIONS, *BIRDS, METEOROLOGY, DISTRIBUTION, PLANTS(BOTANY), CLASSIFICATION, ENVIRONMENTS, BRAZIL.

Subject Categories : Ecology

Distribution Statement : APPROVED FOR PUBLIC RELEASE