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I had heard things along these lines that that video has been debunked: https://www.accuweather.com/en/weather-news/scientists-debunk-myth-that-yellowstone-wol

• heimatau 7y ago
  This is not debunked. Not peer reviewed from what I've gathered from that article, just a lone voice. Yes, ecosystems are very complex but given that complexity, let's not smear an attempt to describe the cause and effect relationship which is assumed, even with your source. Wolves had an effect. Is it overly simplistic in the video I linked? Yes. But is it inaccurate? No. Is there more to learn, describe and understand? Yes.