Future of the Environment

Insects are dying at an alarming rate - and this is terrible news for life on Earth

An insect sticks to a Drosera capensis, a meat-eating plant on display at the carnivorous plant fair "Dejate Atrapar" (Let Yourself Get Caught), in Bogota, Colombia July 19, 2018. REUTERS/Luisa Gonzalez - RC1F215CEF60

Agricultural practices are having a disastrous effect on global insect populations. Image: REUTERS/Luisa Gonzalez

David Meyer
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Future of the Environment

Two-fifths of the world’s insect species may disappear over the next few decades, and we could be looking at a world without any insects at all within a century. Given insects’ importance for sustaining plant and animal life—by pollinating plants and serving as a food source—that’s as dire a prediction as they come.

The warning was issued in a global review of insect declines, in which the authors called for a dramatic rethinking of agricultural practices and better strategies for cleaning polluted waters.

“Unless we change our ways of producing food, insects as a whole will go down the path of extinction in a few decades,” the researchers wrote, according to a Guardian report. “The repercussions this will have for the planet’s ecosystems are catastrophic, to say the least.”

As the Australian researcher Francisco Sánchez-Bayo told the newspaper: “If insect species losses cannot be halted, this will have catastrophic consequences for both the planet’s ecosystems and for the survival of mankind.”

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The projections are based on the downward trajectory of the world’s insect mass, which is thought to be falling by 2.5% per year. The culprits? Agricultural practices that rely on pesticides, the loss of habitats to growing cities, biological change such as the introduction of new species to habitats, and of course climate change.

This is the first global review of its sort, though hardly the first story to point to an alarming decline in insect populations. Pesticides such as neonicotinoids have long been cited as a cause for mass bee deaths in North America and Europe, and last year scientists warned of huge insect losses in Puerto Rico—along with losses of the animals that ate them.

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Related topics:
Future of the EnvironmentFood SecurityClimate Crisis
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