US Army Corps of Engineers
Portland District

Natural and man-made stressors

Graphical depiction of ecosystem stressorsEcosystem stressors are "out of the ordinary" natural and unnatural inputs to the system that disturb the controlling factors, structure, and processes in the ecosystem. Stressors produce potentially large-scale effects on the natural spatial and temporal dynamics of the system.

List of non-natural ecosystem stressors in the Columbia River system:

List of natural ecosystem stressors in the Columbia River system:

Link to Shoreline armoring page Link to Dredging page Link to Wastewater discharges page Link to Extreme climate events page Link to Urbanization page Link to Marinas and overwater structures page Link to Agriculture page Link to Water diversion page Link to Logging page Link to Diking page Link to Flow regulation page Link to Filling page Link to Volcanic activity page Link to Seismic activity page Link to Shoreline armoring page Link to Dredging page Link to Wastewater discharges page Link to Extreme climate events page Link to Urbanization page Link to Marinas and overwater structures page Link to Agriculture page Link to Water diversion page Link to Logging page Link to Diking page Link to Flow regulation page Link to Filling page Link to Volcanic activity page Link to Seismic activity page

Contact information

Ronald Thom, Ph.D
360-681-3657

Marine Research Operations, PNNL
1529 W. Sequim Bay Rd.
Sequim, WA 98382