Grizzlies, wolves, wildlife key to ecosystems’ health

I read with great appreciation an editorial you wrote about the importance of supporting the return of grizzly bears to Washington state (“Give Grizzlies chance to return to North Cascades,” The Herald, Nov. 15).This reintroduction contributing to a more healthy ecosystem. In this time of climate change and arguments about whether or not it’s being caused by anything other than Mother Nature correcting itself, your article brought a lot of common sense observations to this issue.

What it also brought to mind was the wonderful YouTube video (less than 5 minutes long) about the effect of the reintroduction of wolves into Yellowstone Park. It’s called “How Wolves Change Rivers” and is an excellent short tutorial about how ecosystems work, specifically describing a process called a “trophic cascade.” I would highly recommend a viewing of this wonderful film by your viewers.

Jim Bloss

Monroe