35 years ago, scientist Brad Lister left the Puerto Rican Luquillo rainforest after studying the arthropods of the region. He left an area that had a thriving insect population that provided food for all of the birds in the national park. But, when he returned in 2018, Lister and his colleague, Andres Garcia, made a shocking discovery — 98 percent of the ground insects had vanished.
“We knew that something was amiss in the first couple days,” Lister told The Guardian. “We were driving into the forest, and at the same time both Andres and I said: ‘Where are all the birds?’ There was nothing.”
According to Lister’s study, published in October 2018, 80 percent of the insects in the leafy canopy were gone, and on the ground, 98 percent of the insects had disappeared. The believed culprit? Global warming.
Lister noticed the huge decline as insects barely covered the sticky ground and canopy plates in the rainforest, and recalled the long hours it used to take to pick them off. But now, after twelve hours in the forest, there were maybe one or two insects trapped on the plates.
“It was a true collapse of the insect populations in that rainforest,” Lister said. “We began to realize this is terrible– a very, very disturbing result.”
Lister’s study is one of a handful of recent studies about the decline of insect population, and the results are “hyper-alarming” according to experts. In Germany’s natural reserves, the number of flying insects has plummeted 75 percent in the last 25 years. A lack of insects due to drought and heat in the Australian eucalyptus forest has been blamed for the disappearance of birds.
Lister and Garcia also studied the insect numbers in a dry forest in Mexico, and found an 80 percent insect collapse within the last three decades.
Scientists call the crash of insect numbers a significant development and an “ecological Armageddon” as they are a vital part of the foundation of the food chain.
Via The Guardian
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