Each species has its place and performs a specific function in the ecosystem. If it is lost, biodiversity deteriorates and the ecosystem becomes less stable. Living organisms influence each other. They are interconnected, among other things, by food dependencies, thanks to which the circulation of matter and the flow of energy in nature takes place.

On May 20, World Bee Day was celebrated by the United Nations. The special importance of bees in maintaining biodiversity is the reason why we pay attention to these insects on today's International Day for Biodiversity.

The honey bee (Apis mellifera) is one of the farm animals whose activity provides specific products: honey, beeswax, propolis, royal jelly, pollen, bee venom, used by humans in agriculture, pharmaceutical or cosmetics.

At the turn of the century, a close relationship was formed, a kind of symbiosis between the world of plants and bees. In short, this symbiosis consists in providing insects with protein food, which is pollen, and energy food in the form of nectar, with bees pollinating flowers, which is necessary for the formation of vegetables and fruits. It is therefore worth emphasizing that the economic value of pollination by bees goes beyond agricultural production. Bees pollinate all plants, not just crops. An important role of bees is also pollination of native plant species that provide food for wild animals, and this is an element of the proper functioning of the ecosystem.

Proper pollination of plants by bees is the only way to preserve biodiversity, which is so important for the proper functioning of the ecosystem. The importance of this is increasing due to the progressive degradation of the environment, more and more species of plants and animals are dying, and it is bee pollination of plants that maintains this balance.

A common problem known in the modern world is the decline in the number of pollinating insects, especially bees. The most important threats to the population of pollinating insects, including bees, include:

• bee diseases, e.g. American foulbrood, varroatosis, black honeydew, diarrhea;
• pests and enemies of bees - bee hive, hornets, wasps, toads, birds;
• chemicalization of agriculture;
• pollution of the environment, mainly by industry and cars;
• burning grass and felling trees;
• disappearance of crops that have been useful for bees and other insects for a long time. 

The share of the honey bee in the pollination of flowers is about 90%, the remaining 10% falls on other beneficial insects, such as bumblebees and solitary bees, wild mason bees and flies. Already Albert Einstein said that after the extinction of bees, people will have 3-4 years of existence left. If more than 80% of plants depend on pollination by insects, how could nature function without them? If the bees die out, no one else will pollinate the plants. Such a break in the food chain will have huge consequences for all of nature.