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Yet another result of the rampant overpopulation of homo sapless and their also rampant use of insecticides in the most developed nations. No, it’s not a good thing to kill huge numbers of bugs. It may be the canary in the coal mine.
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Factors behind the decline include, perhaps foremost among them, habitat changes wrought by humans, such as deforestation, and conversion of natural habitats for agriculture. In Europe and North America, the decline of small family farms, known for open pastures, hedgerows, and other areas where “weedy” plants like wildflowers can grow—areas that are perfect for insects—has certainly played a part, Wagner adds, as has the draining of wetlands and swamps.
Along with agriculture comes the use of chemicals like herbicides, fungicides, and pesticides. Insecticides, unsurprisingly, hurt non-target species, and neonicotinoids have been implicated in the worldwide decline of bees. Pesticides may play a role in one-eighth of the species’ declines featured in the study. (Related: 9 ways you can help bees and other pollinators at home.)
Climate change undoubtedly plays a big role as well, especially extremes of weather such as droughts, which are likely to increase in intensity, duration, and frequency in the future, Wagner says. Other factors include invasive species, parasites, and diseases.
Insects serve as the base of the food web, eaten by everything from birds to small mammals to fish. If they decline, everything else will as as well, Sánchez-Bayo explains.
They also provide invaluable “services” to humanity, including plant pollination, says John Losey, an entomologist at Cornell University. About three-fourths of all flowering plants are pollinated by insects, as well as the crops that produce more than one-third of the world’s food supply.”
www.nationalgeographic.com
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Factors behind the decline include, perhaps foremost among them, habitat changes wrought by humans, such as deforestation, and conversion of natural habitats for agriculture. In Europe and North America, the decline of small family farms, known for open pastures, hedgerows, and other areas where “weedy” plants like wildflowers can grow—areas that are perfect for insects—has certainly played a part, Wagner adds, as has the draining of wetlands and swamps.
Along with agriculture comes the use of chemicals like herbicides, fungicides, and pesticides. Insecticides, unsurprisingly, hurt non-target species, and neonicotinoids have been implicated in the worldwide decline of bees. Pesticides may play a role in one-eighth of the species’ declines featured in the study. (Related: 9 ways you can help bees and other pollinators at home.)
Climate change undoubtedly plays a big role as well, especially extremes of weather such as droughts, which are likely to increase in intensity, duration, and frequency in the future, Wagner says. Other factors include invasive species, parasites, and diseases.
Insects serve as the base of the food web, eaten by everything from birds to small mammals to fish. If they decline, everything else will as as well, Sánchez-Bayo explains.
They also provide invaluable “services” to humanity, including plant pollination, says John Losey, an entomologist at Cornell University. About three-fourths of all flowering plants are pollinated by insects, as well as the crops that produce more than one-third of the world’s food supply.”

Why insect populations are plummeting—and why it matters
A new study suggests that 40 percent of insect species are in decline, a sobering finding that has jarred researchers worldwide.