[DOWNLOAD] "Observations of Bird Communities in Relation to Reservoir Impoundment." by The Texas Journal of Science # eBook PDF Kindle ePub Free

eBook details

Title: Observations of Bird Communities in Relation to Reservoir Impoundment.
Author : The Texas Journal of Science
Release Date : January 01, 2004
Genre: Engineering,Books,Professional & Technical,
Pages : * pages
Size : 178 KB

Description

Abstract. -- This study describes trends in terrestrial avian communities in response to construction of Aquilla Lake in north-central Texas. Reservoir construction and filling resulted in substantial loss of area in each of four major habitat types. Pre-impoundment surveys began in 1979, with follow up post-impoundment surveys in 1984, 1987 and 1992. Mean bird density, species richness and species diversity were highest among all seasons during the pre-impoundment survey, but declined markedly by the first post-impoundment study. Similarity in bird species composition was greatest among the post-impoundment avian communities. Northern cardinal (Cardinalis cardinalis) and Carolina chickadee (Poecile carolinensis) were the two most common species encountered in all seasons across study phases. Comparisons with data from two adjacent North American Breeding Bird Survey routes suggest that declines among six species may have been related to reservoir construction. Over time, post-impoundment bird communities on Aquilla Lake had fewer bird numbers, had fewer bird species, and were more similar to one another in species composition. **********