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Trial volunteers help parks fight invasive species

Published on NewsOK Modified: May 7, 2013 at 7:06 am •  Published: May 7, 2013

When Vernon Cook sees wildflowers blooming near the historic entrance of Mammoth Cave, he feels a sense of accomplishment.

The Louisville, Ky., resident has helped foster the native blooms by removing invasive plant species from Mammoth Cave National Park, in Kentucky, and creating a place for the flowers to grow.

A Sierra Club volunteer, Cook routinely spends his vacations leading work crews at the park. The volunteers spend their days yanking tree of heaven and garlic mustard out of the ground. In the evening, they sit around a campfire and share stories.

"It's very rewarding to do this," he said. "You meet a bunch of great people."

Around the country, volunteers at parks and on trails are helping to address the problem of invasive species, and doing other trail maintenance, said Rich Dolesh, vice president for conservation and parks for the National Recreation and Park Association in Ashburn, Va. Often, they are motivated by a desire to restore the look and health of a landscape meaningful to them, he said.

"Many people see their sense of place being destroyed by aggressive, invasive plants," he said. "These are plants that will obliterate a landscape."

"People are willing to donate their time if they can see a meaningful improvement," he said.

Volunteers with the Sierra Club and other service organizations pay $200 to $2,000 to participate in the trips. They also must cover the cost of their travel to and from the work site. Accommodations range from tents to bunkhouses to lodges.

Susan Estes of Richmond, Calif., also leads work crews for the Sierra Club. She recalled returning to a spot in Arches National Park, in Moab, Utah, where she and a crew had removed a great deal of the invasive shrub tamarisk. A year later, many of the native plants that had been competing with the tamarisk for water were thriving — including a cottonwood tree where a great horned owl was nesting.

"The beauty of seeing that ... people love the idea of doing something meaningful through their own personal efforts," she said.

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