[Download] "Changes in the Breeding Bird Community of Subtropical Evergreen Forest in the Lower Rio Grande Valley of Texas, 1970S-1990S." by The Texas Journal of Science " Book PDF Kindle ePub Free

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eBook details

Title: Changes in the Breeding Bird Community of Subtropical Evergreen Forest in the Lower Rio Grande Valley of Texas, 1970S-1990S.
Author : The Texas Journal of Science
Release Date : January 01, 1998
Genre: Engineering,Books,Professional & Technical,
Pages : * pages
Size : 201 KB

Description

Abstract. -- Breeding-bird censuses conducted in 1994-1996 at the Santa Ana National Wildlife, southern Texas were compared to those done on the same site in 1973-1978. The study site was described as subtropical evergreen forest in the 1970s, but is now thorn-forest with remnant evergreen forest. Canopy cover was incomplete and lower and trees were smaller and more densely packed in 1994-1996 than in 1973-1978. Seven bird species typical of thorn-forest and thorn-scrub, which were not present in 1973-1978, made up 20% of the breeding bird community in 1994-1996. Species tolerant of thorn-forest and thorn-scrub made up 76.0% of the breeding bird community in 1994-1996, compared to 54.6% in 1973-1978. Three forest bird species disappeared from the study site. Water management will be needed if subtropical evergreen forest and its bird community are to be restored. **********