The authors detail why monitoring the current status and population trends of fish communities and their habitats is an important tool for preserving and conserving aquatic resources in the national parks. The framework for monitoring small streams located in HTLN parks is directed towards maintaining their ecological integrity, which will be assessed through periodic monitoring of fish communities, physical habitat, and water quality. The authors describe the protocol which has been designed to incorporate the spatial relationship of biotic indicators with chemical constituents and physical habitat.