Stories about deer and wolves

At the beginning of the 20th century, there were about 4,000 wild deer in the Kebaber forest in the Rocky Mountains in the western United States, accompanied by fierce wolves, which threatened the survival of the deer. For the peace of these deer, 1906, the president of the United States decided to carry out a wolf killing operation. By 1930, more than 6,000 wolves had been shot and killed. The wolf disappeared in the Kebaber forest. So the deer began to give birth there carefree and unplanned, and soon the number of deer increased to 65438+ 10 thousand. Lush deer eat all edible plants, eat weeds, destroy trees, and other animals that eat plants decrease sharply, which also makes deer fall into the predicament of hunger and disease. By 1942, the number of deer in Kebabel forest had dropped to 8,000, and most of them were sickly, and the once prosperous deer family was rapidly declining. This situation backfired, because the wolf was wiped out. On the one hand, wolves prey on some deer, so that the total number of deer is controlled and will not breed to the extent of damaging vegetation; On the other hand, the deer preyed by wolves are mostly old, weak and sick, which is beneficial to the survival of the fittest and reproduction of deer. On the other hand, deer are often in a state of escape under the chase of wolves, which promotes the robust development of deer. Because wolves have disappeared, deer have no natural enemies, "lazy people" are weak, and deer herds are degraded. In order to save the evil consequences of killing wolves, the US government formulated the "inviting wolves into the room" plan in the 1970s. However, this plan was opposed by some people and was not implemented in time. With the improvement of people's awareness of environmental protection, the plan of "inviting wolves into the room" was finally implemented in 1995. The first wild wolves in Canada were released to the Rocky Mountains, and the forest was full of vitality.

I wonder if these are useful to you.

I think this is what I learned from the story of deer and wolf before.