to provide field personnel with tools and techniques to conduct rehabilitation and restoration projects that address a broad suite of functions and processes, and the tools to assess the relative success in meeting those intended goals. This technical note describes the development of an Index of Biological Integrity (IBI) for riparian ecosystems based on avian community data (Figure 1). The technique is demonstrated using data gathered in the Santa Margarita River watershed in southern California. The resulting IBI may be used to assess and monitor riparian condition in response to human land-use activities. INTRODUCTION: Numerous factors affect ecosystem structure and function on local, regional, and global scales. While many natural processes (e.g., wind and water erosion, sedimentation, microbial and plant succession) gradually alter ecosystem
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