The number of insects worldwide have declined significantly over the past 40 years.
The researchers analyzed data from long-term studies and stated that the number of insects worldwide is rapidly declining.
Researchers have documented the disappearance of a large number of insects in the national reserve of El Yunque (Puerto Rico), which in turn led to the disappearance of a large number of insectivorous animals.
In 2014 an international group of scientists found that over the past 35 years, the number of wasps and beetles decreased by 45%. The study, which was conducted last year, showed a 76% reduction in the number of flying insects in nature reserves in Germany over the past decade. Now scientists have determined that the catastrophic decline of insects is also characteristic of the Americas.
In the new study, the researchers calculated the number of invertebrates in the national Park El yunque and found that it significantly decreased since 1976. In particular, the biomass of arthropods in 40 years has decreased significantly, reaching one-fourth or one-eighth of the previous amount. From January 1977 to January 2013, the number of captured insects was reduced 60 times.
The number of insect-eating lizards of the anolis decreased by 30%, and some species disappeared from the forest. Reduced the number of frogs and birds. For example, the trapping of the Puerto Rican Todi, which feeds on arthropods, decreased by 90%.
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