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All the Pieces Matter

Across
______ change ecosystems by clearing land and building things on the land.
Some ecosystems can change rapidly if one of the pieces has been taken out of the ______.
All the pieces in an ecosystem are like these - once you knock one down, it knocks the next one down, and so on.
Over long periods of time, _______ fall apart and then rebuild themselves.
Wolves were killing this animal in Yellowstone National Park
Every ecosystem on earth depends on a delicate _____ among all the different forms of life within it.
Down
Hunting lions and leopards has reduced their populations, leading to higher populations of this animal
Without the wolves keeping the elk population in check, the elk would've eaten all of this.
All of the creatures within any ecosystem are _____ for the same resources.
All the _____ matter.
Ho Tep Wildlife Reserve wasn't always a forest. 1,000 years ago, it was a ______.
Wild animals are not mean for killing other animals - they're acting on _____ .
Sea otters kept this animal in check, but without the sea otters, this animal has made the massive kelp forests start to disappear.
______ patterns most likely changed Ho Tep Wildlife Reserve from a forest to a desert.