Animals - is part of the world around us.Their influence on human beings and the nature of Earth as a whole is very diverse.
Wildlife
Animals involved in the circulation of substances and maintaining ecological community.What is the role played by animals in nature?Some of them eat the plants, eat other representatives of fauna, and others absorb the remains of dead organisms.
Consumers dead organic matter present in all classes of animals.It worms, fly larvae, beetles, dung beetles, birds and mammals, carrion.By recycling dead organisms, these animals serve as orderlies, cleaning the habitat of rotting organic matter.
value of animals in the life of a person is defined as the ability to maintain the balance of the number of animals living organisms.Carnivorous animals regulate populations of herbivorous, and they, in turn, do not give too propagated plants.Parasites and predators weed out sick, the weak and nonviable individuals.
insects, birds and mammals contribute to pollination, and carry their seeds over long distances.
Animals that produce the limestone skeleton (clams, snails, coral polyps, radiolarians) involved in the formation of sedimentary rocks.
Pets
mankind first domesticated animals about 10,000 years ago.It is believed that the first mate of people became dogs.A little later there was beef and dairy cattle, and then the man domesticated horses.The value of animals in human life is largely determined by the use of what it receives from the domestic species.
first people to use products derived from wild animals, and then gradually they became domesticated breeds display, characterized by highly qualities.This was highlighted in beekeeping and poultry farming.
pets in human life are a source of food and raw materials for industry.They are bred to produce meat, fat, milk, leather, wool, feathers and down, eggs.Man receives from bee honey, wax, medicinal products;He brought rock pond fish, learned to play the silk in large quantities.
Mankind uses some wildlife species for biological control of various pests.In this case, we can not say that he domesticated them, but because people are specially bred ladybugs and predatory mites to combat aphids and mosquitoes.
Why pets
role of animals in human life is not limited to material gain.As children of nature, we all need to communicate with the living beings who are able to give us their love and devotion, entertain and appease, to make our home beautiful and comfortable.And if the original cats and dogs wound up in the house purely for practical purposes, the fish, birds, hamsters, reptiles and insects are the sole purpose - to entertain their owners and decorating the home.
Doctors pay attention to the fact that contact with pets contributes to the normalization of cardiovascular activity, reduces stress and tension after a long day.Socializing with horses and dolphins formed the basis of treatment for many diseases in children.
vermin
But there is also a negative role of animals in human life.The first is the parasite that causes various diseases of people.Worms, protozoa - blood pathogens, horseflies, mosquitoes and ticks, fleas and lice.Most of them cause harm not only to the fact that they themselves are parasitic in humans, but also carry pathogens other infections.
also animals are agricultural pests.Insects attacking crops;rodents that damage trees and spoiling food crop and meat industry - they are an example that displays a negative value of animals in human life.
In nature, there are poisonous animals, which can cause harm to humans: snakes, insects, inhabitants of marine waters.But we can not say that such acts are harmful to nature in general.The world around us does not contain anything superfluous and harmful.A large army of "pests" performs a specific function in a well-established mechanism of nature.Remove one link - and the chain breaks, upset the balance, the consequences will be very sad.How many times in the history of the relationship between man and the nature of such events occurred.
position of animals in the world today
Mastering the world, subjecting it to their needs, mankind is causing irreparable damage to the Earth and its inhabitants.Cutting down forests, plowing virgin soil, drain the swamp and bringing civilization to the farthest corners of the planet, a man deprives animal habitats.The value of animals in human life is enormous, so the government and international NGOs develop a set of measures aimed at preserving endangered species, improving ecological industrial production, conservation of natural resources.
