Bees take emergency measures, demonstrating an extraordinary example of rapid adaptation to the destructive nature of human activity, according to the eminent expert on bees.
Scientists have found numerous examples of a new phenomenon where bees are ’locked’ cell filled with pollen, to no longer use them to protect the rest of the hive from their contents. It turned out that in sealed cells are extremely high levels of pesticides and other potentially harmful chemicals.
"This new discovery came as a complete surprise. Was found that the bees can not only detect the presence of pesticides, but also to isolate the infected stocks. They determine that something is wrong with pollen and encapsulating it," - said Jeff Pettis, an entomologist from U.S. Department of Agriculture.
The problem of reducing the bee population is becoming increasingly important in recent years. The phenomenon of the disappearance of bee colonies called "syndrome of the destruction of the colonies."
Scientists warn that the loss of pollinators could cause serious damage to agriculture.
Pettis said that pesticides are hardly the biggest threat to bees: "Pesticides play a role, but not the most important." Some new pesticides do not have such a destructive impact on bees: for many years, the bees could not be detected in the cotton fields, because they are widely used various chemicals, but in the last five years, bees have to go back there, thanks to a new generation of chemicals the so-called systemic pesticides.
During the study, it was found that the bees in areas with developed agriculture suffer from a lack of nutrients, which is the cause of other problems such as infection by parasites. "Here we have a combination of several factors, and we need to study their interaction in more detail," - he said.
This behavior of the bees was first described in a rather obscure scientific paper from 2009. Since then, scientists are increasingly finding this phenomenon, which ends with the complete extinction of the colony.
The bees collect from plants sticky substance known as propolis, which has anti-bacterial and anti-fungal effect. It is used to polish the cells and for the isolation of undesirable or dangerous substances - for example, are often found in the hive propolis covered with dead mouse. That is the substance bees use to close the cells.
Bees that are sealed cell with pollen - are domestic workers. They differ from the gatherers of pollen from plants. It appears that collectors are not able to determine the presence of harmful substances in the pollen. As the storage, the pollen is going through some changes as a result of microbial activity. In the absence of these variations due to the presence of pesticide, the mechanism of sealing.
According to the materials greenrussia.ru: Beekeeping in the country