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‘Half the tree of life’: ecologists’ horror as nature reserves are emptied of insects
A new point in history has been reached, entomologists say, as climate-led species’ collapse moves up the food chain even in supposedly protected regions free of pesticides.
They include in Germany, where flying insects across 63 insect reserves dropped 75% in less than 30 years; the US, where beetle numbers dropped 83% in 45 years; and Puerto Rico, where insect biomass dropped up to 60-fold since the 1970s. These declines are occurring in ecosystems that are otherwise protected from direct human influence.
[---8<---]
At one research centre – falling within a 22,000-hectare (85 sq mile) stretch of intact forest in Panama – scientists comparing current bird numbers with the 1970s found 70% of species had declined, and 88% of these had lost more than half of their population.
As the insects die off, everything that eats them -- birds, amphibians, reptiles, etc. -- suffers a decline also.
A new point in history has been reached, entomologists say, as climate-led species’ collapse moves up the food chain even in supposedly protected regions free of pesticides.
They include in Germany, where flying insects across 63 insect reserves dropped 75% in less than 30 years; the US, where beetle numbers dropped 83% in 45 years; and Puerto Rico, where insect biomass dropped up to 60-fold since the 1970s. These declines are occurring in ecosystems that are otherwise protected from direct human influence.
[---8<---]
At one research centre – falling within a 22,000-hectare (85 sq mile) stretch of intact forest in Panama – scientists comparing current bird numbers with the 1970s found 70% of species had declined, and 88% of these had lost more than half of their population.
As the insects die off, everything that eats them -- birds, amphibians, reptiles, etc. -- suffers a decline also.
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