In nature everything is balanced initially, but people using their freedom of choice, often has a negative impact on what surrounds it ...
When in 1995. Fourteen wolves were released into the wild in Yellowstone National Park, scientists did not suspect that it will radically change the whole ecosystem of the park.
Wolves were not in the park 70 years, and during that time there reigned deer, which in the years of uncontrolled reproduction (all the efforts of people to control their population did not bring success) caused heavy damage to local flora.
Fourteen wolves, of course, could not eat all the deer, but they made the careful choosing a place for grazing and to avoid certain areas of the park. On the ground began to revive vegetation. For six years, the number of trees has increased fivefold. There beavers, trees which are needed for the construction of dams. The backwaters bred muskrat, ducks and fish. Wolves have reduced the population of jackals, which led to an increase in the number of rabbits and mice, and those in the party attracted to the park hawks, ferrets and foxes. The park came bears, as they were able to drive away the wolves from their prey or to eat up their leftovers. number of berries grown in the park.
But the most surprising, the wolves have changed the course of rivers. Their bed straightened and stabilized, reduced coastal erosion. It happened because the impact of wolves on the deer has led to the explosive growth of the trees and grass along the river banks, which led to their strengthening. It changed the geography of the park itself, and all thanks to the fourteen wolves released back less than twenty years ago.
"And Elohim said, Let the waters swarm with swarms of living creatures; and let birds fly above the earth on the vault of heaven. And Elohim created great whales, and every living creature that creeps, which voskishela water, after their kind, and every bird according to its kind cruise. And Elohim saw that as well. And Elohim blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth. And the evening and the morning were the fifth day. And Elohim said, Let the earth living creatures according to their kinds, and cattle, and creeping thing, and beast of the earth after his kind. And it was so. And Elohim created the beasts of the field but his kind, and cattle after their kind, and every creeping thing of the earth after his kind. And Elohim saw that as well. (Genesis)"