While Peucaea aestivalis (Bachman's Sparrow) will use several habitat types (e.g., pine savanna, pine plantations, clear cuts, abandoned fields), specific vegetative conditions must be present for a site to be acceptable. Bachman's Sparrow presence/absence was examined in forested (mature Pinus palustris [Longleaf Pine] forest and mid-aged pine plantations) and early successional habitats (clear cuts and three-year-old pine plantations) to determine which vegetation variables were best for predicting sparrow occurrence. Across all sampled habitats, the probability of Bachman's Sparrow presence increased with increases in canopy cover and percent grass groundcover. Probability of presence decreased with increases in shrub-layer rating and percent bare ground. When considering only forested habitats, the probability of Bachman's Sparrow presence increased with increasing canopy cover and percent grass groundcover, but decreased with increasing canopy height, shrub height, and stand basal area. In early successional habitats, the probability of Bachman's Sparrow presence increased with greater grass groundcover and decreased with more bare ground. Also, there were more occupied sites in forested habitats than in early successional habitats.
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1 January 2014
Vegetative Characteristics of Bachman's Sparrow Habitat in the West Gulf Coastal Plain
Robert Allen,
D. Brent Burt
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Southeastern Naturalist
Vol. 13 • No. sp5
April 2014
Vol. 13 • No. sp5
April 2014