ROAD MAP FOR STREAM SYSTEM INTEGRITY: The enduring legacy of Richard Horner and Chris May is that they applied systems thinking, investigated whole systems in place, identified four limiting factors, and definitively established their order-of-priority
In the 1990s, Puget Sound research correlated land use changes with impacts on stream system condition. “So many studies manipulate a single variable out of context with the whole and its many additional variables. We, on the other hand, investigated whole systems in place, tying together measures of the landscape, stream habitat, and aquatic life. Unless and until land development practices mimic the natural water balance, communities cannot expect to restore the biological communities within streams. Simply put, hydrology hits first and hardest,” stated Richard Horner.