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<br />2/ Considering the Damaged Riparian Area <br /> <br />from a Watershed Perspective <br /> <br />An important lesson learned from past riparian recovery efforts is the need to <br />evaluate the condition of the damaged riparian area from a watershed per- <br />spective that takes into consideration the uplands, upstream and downstream <br />reaches, and tributaries. This is crucial because the structure and processes of <br />lotic ecosystems, more than any other type of ecosystem, are determined by <br />their connection with adjacent ecosystems. Since riparian ecosystems are in <br />the bottomlands of a watershed, changes in how sediment and water run off of <br />surrounding landscapes impact them most. A disturbance in any part of a <br />watershed will create disequilibrium that will ripple through many ecosystems <br />within the watershed, possibly influencing the condition of the watershed's <br />riparian ecosystems for many years. <br />Ecosystem managers must therefore avoid the myopic approach of de- <br />veloping recovery strategies that are based solely on an evaluation of the <br />immediate degraded riparian site. Evaluating only isolated components of a <br />watershed (e.g., a specific stream reach) will be ecologically incomplete, often <br />failing to provide the information needed to fully understand why the condi- <br />tion of the riparian ecosystem has declined. <br />The evaluation process should also be broadened from a temporal perspec- <br />tive. Collecting information describing past conditions will provide a picture <br />of how the riparian area has changed and some of the potential reasons for the <br />changes. <br />This chapter provides a checklist that covers some of the basic information <br />that ecosystem managers should understand from the start about the damaged <br />riparian area's watershed and the drainageway that passes through it. Al- <br />though general in nature, the information gathered here will form the founda- <br />tion for more detailed evaluation work that may be required when the evalua- <br />tion process moves to focusing specifically on the degraded riparian area. This <br />type of evaluation approach - going from a broad perspective to specifics, as <br />well as from gathering general information to more detailed information - is <br />being used to evaluate the condition of lower Rincon Creek, near Tucson, <br />Arizona (case study 1). <br />