Crooked River Weed Management Area

Central Oregon

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Aquatic Invasives ... Crooked River Weed Management Area

After a talk given by Portland State University at the 2010 annual weed management symposium in Redmond, the CRWMA realized that there is little known about aquatic invasive species in Central Oregon, let alone native aquatic species.  In 2011 Berta wrote and we received an ODA small grant to survey for aquatic plant species in Deschutes, Jefferson and Crook counties as well as Warms Springs Reservation.  We gathered the equipment including; aquatic rakes, depth sounder, dry bags, leased a kayak from the Sunriver Resort and set out for the unknown.

With the help of Jamie Crafton and Kaitlin Brouhard, we surveyed lakes, reservoirs, rivers and creeks across Central Oregon.  At each location we chose at least one place like a boat ramp, to conduct a transect sampling. Transects were done perpendicular to the shore, tossing the aquatic rake out a minimum of ten tosses. On each toss we recorded depth of the toss, density and total percent species.

In the end two invasive aquatic plants were found, Eurasian water milfoil and curly leaf pondweed.  With no ODA funding for 2012 we are looking for support from our partners to continue important further survey to find new sites and distribution of known infestations of Eurasian water milfoil.

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