this post was submitted on 03 Jun 2025
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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

Reports of falling insect numbers around the world are not new. International reviews have estimated annual losses globally of between 1% and 2.5% of total biomass every year.

Widespread use of pesticides and fertilisers, light and chemical pollution, loss of habitat and the growth of industrial agriculture have all carved into their numbers. Often, these were deaths of proximity: insects are sensitive creatures, and any nearby source of pollution can send their populations crumbling.

But what Janzen and Hallwachs are witnessing is a part of a newer phenomenon: the catastrophic collapse of insect populations in supposedly protected regions of forest. “In the parts of Costa Rica that are heavily hit by pesticides, the insects are completely wiped out,” Hallwachs says.

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[–] conditional_soup@lemm.ee 54 points 4 days ago* (last edited 4 days ago)

Yeah, I'm in California's central valley, which is a lot like the Serengeti in that it's a grassy desert-ish thing that's seasonally wetted by snowpack melt. It's actually pretty swampy in its natural state. Used to be that you couldn't drive forty minutes here without your car being a hopeless mess, especially in the late winter/spring. Now, I almost never hit a bug at all. It's been that way for years. I pointed it out to my nature-loving MAGA mom and it freaked her the fuck out.