Animals have adapted to their own living environment and natural enemies, so as to maintain ecological balance, once the destruction of this ecological balance, there will be disasters. The main causes of animal disasters are in the following aspects.
(1) Animal disasters caused by natural factors. Climate change and environmental changes change the number and habits of animals. If drought causes locust outbreaks, crop particles are not harvested. Climate change occurs forest pests and diseases, so that thousands of acres of forest destruction, the loss is far greater than forest fire.
(2) Animal disasters caused by the animal itself. Some animals are too strong or too weak to reproduce, too much or too little, resulting in ecological imbalance. Such as the rat breeding power is too strong, lack of natural enemies, rampant, not only devouring food, but also infecting a variety of diseases, destroying facilities. If drought causes locust outbreaks, crop particles are not harvested. The abuse of pesticides, so that the natural enemies of rats were killed and wounded, resulting in a disaster in mice, resulting in a human rat war. In addition, there are insect disasters, rabbit disasters, bee disasters and so on. There are more than 6,000 pests that harm crops worldwide, and they cause serious agricultural disasters each year that could cause millions of deaths from famine.
(3) Animal disasters caused by human factors. Animal disasters are more due to human destruction of the environment, such as deforestation of forests, grassland reclamation, land reclamation around the lake, animal slaying, etc., accelerate the extinction of species, destroy the diversity of living things, their natural enemies breeding into disasters. For example, in the 1950s, our country launched a "de-four" campaign, in which the sparrow signed as a bird to annihilate, which contributed to some of the subsequent pests. Such as environmental destruction, destruction of animal living environment, destruction of animal food chain, accelerate the extinction of species, destruction of biological diversity: such as excessive use of chemical pesticides, resulting in water, air and soil pollution, ecological balance destruction, and cause species variation and resistance caused by animal disasters.
(4) In particular, it should be pointed out that because of the blind introduction of species, resulting in the invasion of alien species, causing the spread of animals off-site. Australia had no rabbits, and more than 100 years ago, the good people brought 24 European cave rabbits to Australia, which lacked natural enemies, leading to overbreeding and disaster.
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