trophic-cascade   2

University of Arizona ornithology: hawks protect hummingbird nests from jays.
Finding the perfect place to raise your precious little‘uns is no easy feat. It's a lot harder if you happen to be a hummingbird. Now, instead of school districts and playgrounds, you’ve got to worry about pesky jays snatching your young straight from the nest. Fortunately, nature has the solution: Just add hawks!
hummingbirds  hawks  ecology  trophic-cascade 
september 2015 by ianmclaury
How Wolves Change Rivers
"When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains in this movie remix."
biodiversity  trophic-cascade  yellowstone  wolves  ecosystem 
february 2014 by pierredv

related tags

biodiversity  ecology  ecosystem  hawks  hummingbirds  wolves  yellowstone 

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