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An Objective Method to Determine an Area's Relative Significance for Avian ConservationAuthor(s): Daniel J. Twedt
Source: In: Ralph, C. John; Rich, Terrell D., editors 2005. Bird Conservation Implementation and Integration in the Americas: Proceedings of the Third International Partners in Flight Conference. 2002 March 20-24; Asilomar, California, Volume 1 Gen. Tech. Rep. PSW-GTR-191. Albany, CA: U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station: p. 71-77
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: Download Publication (1.0 MB)
DescriptionLand managers are often concerned with providing habitat that affords the "best habitat for songbirds." However, unless management simply is directed at rare species, it may not be clear which habitats or management options are best. A standard, quantifiable measure to compare the significance of different tracts of land or competing management techniques for avian conservation would benefit managers in decision making. I propose a standard measure that is based on the relative density of each species within a finite area and their respective regional Partners in Flight concern scores. I applied this method to >100 reforested sites in the Mississippi Alluvial Valley that ranged in age from 2 to 32 years. The objectively determined avian conservation significance for each of these reforested sites was correlated with stand age and with my subjective assessment of "habitat quality." I also used this method to compare the avian conservation significance of forested habitats before and after selective timber harvest. Sites with high significance for avian conservation provided habitat for species of conservation concern. I recommend application of this methodology to other sites, and areas under different management, to determine its usefulness at predicting avian conservation significance among habitats and at various avian densities.
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CitationTwedt, Daniel J. 2005. An Objective Method to Determine an Area''s Relative Significance for Avian Conservation. In: Ralph, C. John; Rich, Terrell D., editors 2005. Bird Conservation Implementation and Integration in the Americas: Proceedings of the Third International Partners in Flight Conference. 2002 March 20-24; Asilomar, California, Volume 1 Gen. Tech. Rep. PSW-GTR-191. Albany, CA: U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station: p. 71-77
Keywordsavian habitat, conservation significance, objective assessment
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