The Cost of Ecosystem Change: The Sierra Nevada Bighorn Sheep

We think of the sagebrush steppe as a symbol of the American west,
but until only 250 years ago, this was not the case. UC Davis
anthropologist Robert Bettinger sheds light on the cascade of
large-scale ecosystem changes brought on by humans in California
that threatens the last remaining Sierra Nevada Bighorn Sheep.
Series: "UCTV Prime" [Science] [Show ID: 32534]