ジ Was in history: About Wolves

 When in 1995, fourteen wolves were released into the wild in Yellowstone National Park, scientists did not suspect that this would radically change the entire ecosystem of the park.

There were no wolves in the park for 70 years and all this time deer reigned there, who over the years of uncontrolled breeding (all the efforts of people to control their population were unsuccessful) caused severe damage to the local flora. Fourteen wolves, of course, could not eat all deer, but they forced those to carefully choose places for pasture and to avoid some parts of the park. In those places, vegetation began to revive. For six years, the number of trees increased five times. Beavers appeared who needed trees to build dams. Muskrats, ducks and fish were found in the backwaters. Wolves reduced the population of jackals, which led to an increase in the number of hares and mice, and they in turn attracted hawks, ferrets and foxes to the park. Bears came to the park, as they were able to drive the wolves away from their prey or eat up their leftovers. The number of berries increased in the park.

But most surprisingly, the wolves changed the course of the rivers. Their channels straightened and stabilized, coastal erosion decreased. This happened because the influence of wolves on deer led to explosive growth of trees and grass along the banks of the rivers, which led to their strengthening. The geography of the park itself changed, and all thanks to the fourteen wolves released there less than twenty years ago.

   Source:  https://vk.com/history_0z  

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