People of Northwest Public Radio
Mon May 13, 2013
Study: Cheatgrass Severity Affected By Grazing
A new study out of Oregon State University suggests that overgrazing could be helping an invasive grass to flourish. That differs from previous studies that have found grazing can better manage that plant -- cheatgrass -- which threatens rangeland habitat. For EarthFix, Courtney Flatt has more.
The invasive plant cheatgrass can increase the frequency and severity of rangeland fires.
The study found when livestock and wildlife overgraze rangeland, they can trample soil and thin out native bunchgrasses. The authors say that creates bare spots between the sagebrush and bunchgrass. Those bare spots are where cheatgrass thrives.
Paul Doescher is one of the study’s authors. He says the study does not suggest cattle should be removed from rangelands. Instead, ranchers can be:
Doescher: “Paying really careful attention to the timing, and the frequency, and the intensity of the grazing on the site. And there’s a lot of ranchers that do this already.”
Other studies have suggested that grazing can help reduce cheatgrass growth. But Doescher says the Oregon State University study found more cheatgrass in heavily grazed areas.
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