National Water-Quality Assessment (NAWQA) Program
Assessments of stream health that are limited to a single biological community are likely to underestimate the effects of land and water use on stream health.
Natural fluctuations of flows are critical to stream health because they build and maintain physical habitats, influence physical and chemical characteristics of water, and provide important life-stage cues for aquatic organisms.
Unraveling the effects of multiple factors on stream health
Stream health is often reduced due to multiple factors--temperature, nutrients, or pesticides. Understanding the interacting natural and manmade factors that influence aquatic communities is essential to implementing effective management strategies to protect stream health.
Daren Carlise (USGS),
Peter Ode (CA Department of Fish and Wildlife),
and David McKinney TN Wildlife Resources Agency
National Aquatic Database of Aquatic Bioassessment Data
Aquatic Sampling Protocols
Diatoms of the United States -A tool for Taxonomic Consistency
National Reference Site Database
Congressional Briefing Presentations
Natural Stream Ecosystem (PDF)
Urban Stream Ecosystem (PDF)