Scotch Broom
Scotch Broom
Scotch broom is a bushy shrub that can grow up to six feet tall. It is invasive to hillsides, pasture, forest clearings, and dry waterways in Idaho, Montana, Utah, and much of the east and west coasts of the North America. While thriving in sandy sunlit areas, it does not tend to survive well in barren or cold areas. The presence of Scotch Broom affects wildlife habitat and out-competes native vegetation in the area.
Invaded wetland
Reed Canary Grass
Reed canary grass is an invasive noxious weed found in wetlands, ditches, pastures, and on shorelines across Washington State. It can clog up streams and ditches, which increases flooding and blocks passage for salmon and other fish. Control is recommended, especially in areas where wetlands are being restored.
Tansy Ragwort
Tansy Ragwort
Tansy ragwort is an invasive noxious weed and a threat to livestock and agriculture because all plant parts are toxic. It is most often found in disturbed areas and can invade any soil type across the Pacific Northwest. While commonly avoided by animals, it may go undetected when mixed with hay, affecting the health of livestock and other grazing animals.

Invasive Species in the Pacific Northwest

Invasive Species Impact Cultural Resources

Organisms moved and introduced to new areas around the globe can become invasive. Once established, these organisms negatively impact our natural and cultural resources if left uncontrolled.

Below is a list of critical ecosystems with examples of invasive species affecting Tribal lands in Washington.

Pressing Issues in the Pacific Northwest

English ivy growing on trees

Forest Ecosystems

invasive aquatic plant species

Aquatic Ecosystems