Abstracts and Resúmenes USDA Forest Service Proceedings RMRS-P-36. 2005. 553 554 USDA Forest Service Proceedings RMRS-P-36. 2005. Posters and Pre-Reviewed Abstracts Presented at the Conference: English and Spanish (some titles and authors are different from the finalized versions) Carteles y Resúmenes Prerrevisados Presentados en la Conferencia: Inglés y Español (algunos títulos y autores son diferente al de las versiones completadas) 1 2 3 2 ALBRECHT, ERIC W. , Brian F. Powell , Don E. Swann , and William L. Halvorson . 1Deceased September 20, 2004; 2USGS Sonoran Desert Research Station and School of Natural Resources, 125 Biological Sciences East, University of Arizona, Tucson, AZ 85721; 3National Park Service, 3693 South Old Spanish Trail, Tucson, AZ 85730;
[email protected]. Species richness as an avian community monitoring parameter. Species richness is rarely used as a long-term ecological monitoring parameter, yet it represents many characteristics that are recommended for consideration in parameter selection: it is relevant to most land-management goals, has low natural and sampling variability, and is cost effective. While species richness is less sensitive to environmental change than is abundance, it often responds to significant changes (e.g., habitat fragmentation or loss), and methods used to estimate richness allow estimation of other useful parameters (species distribu- tion, species composition). We used data collected in five national parks in southern Arizona and New Mexico to evaluate the potential of avian species richness as a parameter to detect trends in breeding bird communities. Parks surveyed repre- sent gradients in factors such as elevation, vegetation communities, and park size.