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Contributor

Hawkins, Mary Beth (Faculty Mentor), Karlin, Melissa (Faculty Mentor)

Digital Publisher

Digital Commons at St. Mary's University

Publication Date

Spring 2026

Keywords

Birds, Population factors, Abiotic stress, Biotic stress, Urban Development, Habitats

Description

Birds are heavily impacted by urban development. Many experience habitat fragmentation and removal of food sources. However, other species can adapt to and even thrive in urban environments, thanks to certain tree species, bird feeders, and buildings. In North America, the house sparrow and the European starling are invasive species that benefit from urban environments (Bartelt, 2011; Fitzwater, 2014). Meanwhile, many habitats across the continent are experiencing restoration/rewilding efforts for the benefit of birds. One such habitat is the oak-savannah, which is characterized by 10-30% canopy cover and a mixture of prairie & woodland vegetation, supporting a high diversity of bird species. While this habitat is one of the most endangered in the world, it has great potential for restoration (NCRS, 2008; Brawn, 2006; Vander Yacht, et al., 2016; Au et al., 2008). I compared 3 bird-feeding sites on campus over a 12-week period, one of which is undergoing oak-savannah restoration. I tested the hypotheses that native bird diversity would be greatest in the restored treatment and that it would increase over time in the restored treatment.

Format

PDF

Size

1 poster

City

San Antonio, Texas

Bird population response to abiotic and biotic stresses in urban & restored oak savannah habitat

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