Sputnik Vitaly Timkiv
The number of butterflies in Europe has decreased since 1990 by 39%.
Experts at the European Organization for Butterfly Conservation Europe reached this conclusion after studying the environmental conditions related to 17 species of butterflies widespread in the European continent.
The study conducted by the scientists focused on the conditions of butterflies in Britain and the Netherlands. The study indicated that the Netherlands has decreased the number of these insects since 1990 by 50%, with a decrease in the number of butterflies in 25 species. The average number of butterflies in 9 species did not change.
As for Britain, the number of butterflies has decreased since 1976 by 50%. Yet 30% of its species are still expanding areas in which they are settled. The scientists said that the butterflies live in special areas only and need constant monitoring, otherwise they can disappear completely.
Scientists consider that the reason for the decrease in the number of butterflies in some European countries is related to the shrinkage of the natural field of their spread, and the reason is due to the development of agriculture, chemical pollution of the air and land, as well as climate changes.
However, the last factor (global warming) has a positive role in the spread of butterflies towards the north. The insects that have adapted to the cold climates move to cold mountain tops and highlands.
In order to preserve the endangered butterfly species and their numbers, the scientists suggested taking more care of their natural areas such as meadows, grasslands, swamps and forests. The scientists also insist on using more environmental methods of farming as well as supporting farmers who practice them.
In particular, it is suggested to use fertilizers that are less dangerous to the environment and insects, and to take care of green areas in cities and to preserve biodiversity by growing wild flowers for butterflies.