Scientists are concerned about the serious reduction of insects, without which the development of agricultural production will be in question. This is despite the fact that some types of insects, on the contrary, cause enormous damage to vegetation.
Experts emphasize that to a large extent the reduction of insects is the result of ill-conceived human actions. Natural change is only one, but far from the main reason for the reduction of insects on the planet.
These are the conclusions of the report on the sharp reduction of insects - the scientific entomofauna. The report was prepared by specialists from the Universities of Sydney and Queensland from Australia and the Chinese Academy of Agricultural Sciences. Here are the conclusions scientists have come to.
At present, 40% of all species of insects are threatened with extinction, and the biomass of insects on our planet is reduced by 2,5% per year. After 50 years, the current biomass of these creatures can be reduced by half. And such a sharp reduction, according to experts, can cause "catastrophic" consequences for the entire ecosystem.
Until recently, the main attention was paid to the protection and preservation of various species of fish and large mammals, and insects received too little attention. Meanwhile, 60% of birds feed on insects. This amounts to 500 million tons per year.
Another detail. 80-90% of wild plants depend on insects for pollination. Some types of insects cause damage to humans, while others control the number of these same insects. In 2006, the United States estimated that the benefits of insect “services” amounted to $ 57 billion per year. It should be noted that recently began to talk about the widespread use of insects for animal feed. Readers of KV, in particular, not so long ago could learn about Saudi Arabia's plans to build special farms for growing flies for their subsequent use in dairy farming.
It is also well known that in many countries of Asia and Africa, insects are widely used as real food products. The local population has been using insects for thousands of years. FAO even published a report a few years ago calling for greater use of such a menu in other parts of the world. All this must also be taken into account.
The authors of the latest study indicate the main causes of insect contraction in the world. This is, first of all, the loss of habitats due to the onset of cities (urbanization), as well as the development of intensive agriculture. In second place is the biological effect on insects, the use of chemical protective equipment, etc.
Finally - climate change and rising temperatures, which greatly affects insects, especially in tropical regions of the world.
A source: http://kvedomosti.ru