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America Lost 22% of Its Butterflies Within Two Decades
robot(spnet, 1) — All
2025-03-09 00:22:01
Butterflies "are vanishing from U.S. landscapes at an alarming rate," reports CBS News:
A comprehensive study, published Thursday in the journal Science, found that 22% of butterflies in the United States disappeared between 2000 and 2020... The researchers behind the Science study used data from more than 12.6 million butterflies spanning 342 individual species, drawing from 76,000 surveys across 35 nationwide monitoring programs. Funded by the U.S. Geological Survey, the study was the first to integrate such a vast dataset, its authors said.
The findings revealed that 33% of butterfly species have experienced significant population declines over the past two decades, with 107 out of the 342 species examined losing more than half of their population — including 22 species that declined by more than 90%. Meanwhile, only 3% of species showed population increases...
Ultimately, the butterfly decline is part of a larger global trend of insect population loss, with insects declining by about 1-2% annually, the study's authors said. Butterflies play an essential role in ecosystems, pollinating flowers, crops, and other plants. Their decline could have far-reaching impacts on plant reproduction and the health of ecosystems.
Just three months ago the U.S. Fish and Wildlife Service said America's western migratory populations of monarch butterflies had declined by more than 95% since the 1980s, putting them "at greater than 99% chance of extinction by 2080." (America's eastern migratory population were estimated to have declined by approximately 80%.)
This latest study found that one factor is climate change, according to CBS News, which reduces food sources, disrupts breeding cycles and increases habitat stress. (Another factor is pesticide use, which fortunately can be adjusted with various policy interventions and farming practices.)
And one of the study's co-authors tells CBS News that "the things we do in our own backyards actually make a difference." They recommend allowing backyard to "grow wild" with native plants (and reducing pesticide use) — even creating "habitat spaces" for insects like small piles of brush. "Even simple actions — like leaving a strip of wildflowers or planting species that support pollinators — can provide crucial resources for butterflies and other insects."
[ Read more of this story ]( https://science.slashdot.org/story/25/03/08/0523212/america-lost-22-of-its-butterflies-within-two-decades?utm_source=atom1.0moreanon&utm_medium=feed ) at Slashdot.
robot(spnet, 1) — All
2025-03-09 00:22:01
Butterflies "are vanishing from U.S. landscapes at an alarming rate," reports CBS News:
A comprehensive study, published Thursday in the journal Science, found that 22% of butterflies in the United States disappeared between 2000 and 2020... The researchers behind the Science study used data from more than 12.6 million butterflies spanning 342 individual species, drawing from 76,000 surveys across 35 nationwide monitoring programs. Funded by the U.S. Geological Survey, the study was the first to integrate such a vast dataset, its authors said.
The findings revealed that 33% of butterfly species have experienced significant population declines over the past two decades, with 107 out of the 342 species examined losing more than half of their population — including 22 species that declined by more than 90%. Meanwhile, only 3% of species showed population increases...
Ultimately, the butterfly decline is part of a larger global trend of insect population loss, with insects declining by about 1-2% annually, the study's authors said. Butterflies play an essential role in ecosystems, pollinating flowers, crops, and other plants. Their decline could have far-reaching impacts on plant reproduction and the health of ecosystems.
Just three months ago the U.S. Fish and Wildlife Service said America's western migratory populations of monarch butterflies had declined by more than 95% since the 1980s, putting them "at greater than 99% chance of extinction by 2080." (America's eastern migratory population were estimated to have declined by approximately 80%.)
This latest study found that one factor is climate change, according to CBS News, which reduces food sources, disrupts breeding cycles and increases habitat stress. (Another factor is pesticide use, which fortunately can be adjusted with various policy interventions and farming practices.)
And one of the study's co-authors tells CBS News that "the things we do in our own backyards actually make a difference." They recommend allowing backyard to "grow wild" with native plants (and reducing pesticide use) — even creating "habitat spaces" for insects like small piles of brush. "Even simple actions — like leaving a strip of wildflowers or planting species that support pollinators — can provide crucial resources for butterflies and other insects."
[ Read more of this story ]( https://science.slashdot.org/story/25/03/08/0523212/america-lost-22-of-its-butterflies-within-two-decades?utm_source=atom1.0moreanon&utm_medium=feed ) at Slashdot.