Herbivores take toll on ecosystem, Environmental effects from deer and elk rise as their natural predators decline, a study finds April 10, 2012 Oregon

Oregon Deer Population and Management News Archive

... Deer, elk and other big herbivores cause surprisingly extensive damage to forests and streams when their populations surge ... a new study by two Oregon State University professors. The research looked at 42 studies over the past 50 years across [deer populations in many western states are below pre-settlement levels. For example, about 450,000 deer in California currently, compared to about 800,000 in early 1800's] ... The study found that densities of large herbivores — such as deer and elk — were six times greater in areas without wolves, compared to those in which wolves were present ... [a link to the journal where you can download this article:  Large predators limit herbivore densities in northern forest ecosystems. William J. Ripple and Robert L. Beschta]

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