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The the 1920’s what animal did humans eliminate from Yellowstone National Park?
Grey wolves
What did it say in box 1?
Grey wolves Eliminated (1920s)
What is the apex predator?
Grey Wolves
Immediately after wolves were removed, this animal's population exploded?
ecause wolves control
Elk
Stream banks were rapidly?
Eroding
What did it say in box 2?
Elk population Exploded
What is the primary consumer?
Elk
Because the elk population grew so fast, the grass and plants could not do this fast enough?
Grow back
Decades later what did scientist notice?
The park beaver population had vanished
What did it say in box 3?
Young Willows over consumed
What is the primary producer?
Young Willow
Elk ate almost every young willow tree because they needed this?
More food
What happened to the elk population?
It grew/exploded
What did it say in box 4?
Beavers vanished & Banks eroded
Rather than being hunted, beavers left or died out because elk ruined these what thing they needed?
Wood for building a dam
What was the type of trees that the elk ate and the beavers needed for their dams?
Young willow tree
How did the grey wolves population go extinct?
The grey wolf population went extinct in yellowstone national park because of over years of hunting
Scientists noticed the beaver population had vanished this long after wolves were eliminated.
Decades later