Theresa Thom, PhD Updated:12/2020

Aquatic invasive species (AIS) (sometimes called exotic, invasive, nonindigenous or non-native) are aquatic organisms that invade ecosystems beyond their natural, historic range. Their presence may harm native ecosystems or commercial, agricultural, or recreational activities dependent on these ecosystems. They may even harm our health.


Contact Theresa Thom, PhD

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Contact Theresa Thom, PhD

U.S. Fish and Wildlife Service - Pacific Region
Regional AIS Coordinator
911 Ne 11th Avenue
Portland, OR  97232-4181
Phone: (503) 736-4722
Fax: (503) 231-2062


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