Zilker Neighborhood Gardens

Commentary by a National Wildlife Steward who helps Zilker neighbors establish native plant gardens

How Wolves Changed Rivers (in Yellowstone)

I so enjoyed watching this four minute video highlighting how the introduction of wolves into Yellowstone in 1995 (a year I drove through Yellowstone, as I moved from California to Michigan for graduate school) not only change the ecosystem but changed the actual physical geography (the flow of rivers). It’s a story of “trophic cascades” in which an introduction to the top of the food chain can have remarkable effects all the way to the bottom.

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