Theses and Dissertations - UTB/UTPA
Date of Award
12-1997
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Biology
First Advisor
Dr. Robert I. Lonard
Second Advisor
Dr. Timothy Brush
Third Advisor
Dr. Frank W. Judd
Abstract
Riparian habitats along the Rio Grande at Santa Ana National Wildlife Refuge have dramatically decreased since the construction of Falcon Dam in 1953. Riparian habitats are dependent on annual or periodic flooding to maintain their biological integrity. Lack of seasonal flooding has contributed to changes in vegetative composition from riparian forests to thornscrub. Effects of artificial flooding on vegetation and avifauna of riparian woodlands were evaluated from 1995-1997 at the Santa Ana National Wildlife Refuge. Floodwaters caused the destruction of all existing herbaceous species along study transects and the regeneration of new and native seedlings. Avian abundance and diversity dramatically increased during peak flooding months. Water released into riparian woodlands from the Rio Grande was part of a wetland restoration project conducted by the U.S. Fish and Wildlife Service. Continued management, involving artificial flooding, is needed to conserve this rare riparian habitat which is in danger of being lost due to lack of seasonal flooding.
Granting Institution
University of Texas-Pan American
Comments
Copyright 1997 Charles David Castillo. All Rights Reserved.
https://www.proquest.com/dissertations-theses/effect-artificial-flooding-on-vegetation-avifauna/docview/304430032/se-2?accountid=7119