Abstract
Urban vacant lots can vary considerably in their vegetation structure, from dense, shrubby habitats to wooded remnant fragments that may provide habitat for a variety of birds. By identifying which features promote diverse bird communities, we can determine at which scale management practices should focus and the necessary habitat structure and composition features. We surveyed 150 vacant lots throughout Baltimore, Maryland for their bird communities, lot vegetation, and landscape-level forest cover. An ordination of the bird community indicated a response to a gradient of canopy cover and canopy height at the vacant lot. We also found that forest cover within 100 m of the vacant lot was the most important predictor of abundance for five bird species of interest. Species richness was spatially autocorrelated among sites, indicating that bird communities may also be driven by species’ dispersal and environmental gradients across the city. Overall, bird communities are responding to habitat features across multiple scales, from the vacant lot vegetation, to landscape-level forest cover, to city-wide dynamics. Thus, we recommend management practices to focus on increasing city-wide forest cover in order to increase species richness, yet with awareness regarding where the lot occurs within the city.
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Acknowledgements
This project was supported by the National Science Foundation Long-Term Ecological Research Program (DEB-1027188). We are grateful for the field assistance provided by E. S. Carpenter, A. Savage, J. Bos, E. Suzuki, C. Griffith, and S. Scully.
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Rega-Brodsky, C.C., Nilon, C.H. Forest cover is important across multiple scales for bird communities in vacant lots. Urban Ecosyst 20, 561–571 (2017). https://doi.org/10.1007/s11252-016-0614-5
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DOI: https://doi.org/10.1007/s11252-016-0614-5