An impact to riparian/wetland resources alters the physical, chemical or biological components of the ecosystem. Actions that contribute to the decline in abundance, distribution, or functionality of riparian/wetland resources would be adverse impacts. Conversely, beneficial impacts result from management actions that protect or restore riparian/wetland resources in the Planning Area.

Direct impacts to riparian/wetland resources result from disturbing vegetation or ground surface in these communities. Indirect impacts to riparian/wetland communities result from actions in a watershed that cause a change in riparian/wetland functionality (e.g., increased rates of sediment loading or changes in hydrology), a change in water chemistry, or spread of invasive species. Short-term impacts occur in the 5 years following the disturbance and include increased sediment loading into streams and the potential spread of invasive species. Long-term impacts last longer than 5 years and primarily include loss of habitat due to development or other activities that degrade riparian/wetland resources (e.g., permanently altering stream morphology and associated vegetation).