Another common theme among them all is the call for further research to better understand the nature of the relationship between urbanization and stream degradation; however, by the 21st century these calls are appearing to be more skeptical of any real or effective solution being implemented to "bring back" the aquatic life once supported by these aquatic systems. No clear census data for the area's salmon population has been provided by any reliable source; an assessment of salmon populations, particularly king and steelhead, is mainly dependent upon the observation methods of local inhabitants, such as the Muckleshoot Indian Tribe, which has been instrumental in delivering information about the local salmon population over the preceding decades (Kerwin, 2016)
Stream Degradation and King County' Salmon Population King County in Washington State is home to some of the most significant spawning beds in the nation for several major species of salmon, such as the endangered steelhead and Chinook (or King) species. As a result of Washington's urbanization over the preceding years and decades, the purity and integrity of King County's streams and rivers have been degraded and the waterways contaminated (Morley, Karr, 2002)