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Coalition makes ground on tamarisk war
June 9th, 2014
By Jim Mimiaga Journal staff writer
A coalition of land managers, ecologists, and young adults have been slowly eradicating invasive plant species on the Lower Dolores River the last five years.
On the frontlines is the Dolores River Restoration Partnership, formed in 2009 to restore native habitat on 175 miles of the river – from McPhee Dam to the confluence of the Colorado River. The war on the non-native tamarisk plant is especially showing results, said Mike Wight, river restoration director with Durango-based Southwest Conservation Corps.
“We’ve really tackled the tamarisk problem, with an initial treatment that covered 1,105 acres,” he said. “We’re seeing 767 acres trending towards native vegetation and are continuing to monitor all our worksites.”
Controlling the pervasive tamarisk plant is improving access to the river, bringing back native plant habitat, and opening up views of the river from scenic byways like Colorado 141.
“Removing tamarisk also reduces fire risk, opens up land for cattle grazing, and improves wildlife habitat,” Wight said. “For boaters and recreationists, it clears areas for additional camping along the shore.”
Each spring and fall, an army of young adults are trained in plant identification and then trek to remote sections of the Dolores river armed with chain saws and herbicides. The crews are provided by the Southwest Conservation Corps, Canyon Country Youth Corps, Western Conservation Corps, programs supported by AmeriCorps.
The partnership has raised $3.8 million in funding for the project from private and public entities, including the BLM, U.S. Fish and Wildlife, and The Nature Conservancy. On the Tres Rios BLM section of river below McPhee dam, 198 acres were treated for tamarisk control, opening up campsites and creating more natural shorelines. Another 85 acres are planned for invasive plant controls there.
A key component is follow-up treatment, Wight said. Native willow, sumac, and cottonwoods are planted, and native grass seeds are spread around where tamarisk once dominated. In 2013, the organization seeded 626 acres along the river. Besides removing tamarisk, the organization also removes Russian knapweed and Siberian elm throughout the watershed.