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Insects disappear – we lose beetles and butterflies, but we get cockroaches



Insect populations are "protected all over the world", and only resistant species, such as City cockroaches, are eager to have a trend that has a significant impact on the animals they rely on, says Australian scientists.

Although butterflies can stimulate poets and even encourage beetle empathy, many of them have fallen sharply compared to global and resistant species, such as roaches, which are also highly adaptable in home forests and towns.

Although Australian insects are likely to follow the same continental spiral as in Europe and North America, taking into account the use of chemicals from similar farms, poor local species' knowledge makes the impact of the downturn difficult, ”said Francisco Sanchez-Bayo, Sydney University Honorary Member.

Australian entomologists are rare species of their own, ”Sanchez-Bayo said. "We can't do long-term studies and we can't do it all over Australia ̵

1; it's too big. We don't have human resources."

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  Macleay's Swallowtail, one of the butterflies found around Canberra.

SUZI BOND / FAIRFAX MEDIA

one of the butterflies found around Canberra

. Australian insect species. Scaling down the jobs of researchers, including in government offices, has made it difficult to observe known species of populations, not to mention the new ones.

Sanchez-Bayo and Kris Wyckhuys reported in April. In the Biosafety Journal, one third of all insect species are threatened in the countries concerned. Total insect biomass is also decreasing by 2.5 percent. Worldwide, 73 historical reports have been discovered.

The article identifies habitat loss, such as urban sprawl and intensification of farming – greater long-term living pesticides and other agrochemicals, pathogen growth and climate change as key factors leading to recession. . "It's a reality – insects disappear everywhere."

In fact insects are very important for pollination, material recycling in soil and water treatment. They are also a major source of food for birds, bats, fish and many other vertebrate species that usually attract more scientific interest and compassion. go to hunger, Sanchez-Bayo said. "They will disappear simply because they do not have food." “/>

"OTHER 99 PER CENT"

Richard Kingsford, Director of the Center for Ecosystem Science at NSW University, said invertebrates were often referred to as "the other 99". cent "because they make up the bulk of global biodiversity."

"They are a little unnoticed, not recognized when we measure and observe the biodiversity-oriented megafauna – birds, mammals, reptiles, frogs and fish. what makes the world of the environment tickle, ”said Kingsford

.“ They do a lot of people who don't cost anything. And they are important for the future of the planet, ”he said, adding a new document. The global trend is worrying about the loss of biodiversity

Sanchez-Bayo said that the vast majority of the public could feel the daily experience that the number of insects was on the slip.

He said he was driving an Australian bush that used to fill the windshields with insects. On the contrary, the recent trip from Sydney to Kooma in the snow mountains left an "intact" windshield

"TOO MUCH PESTICIDES"

. From North America and Europe, the likelihood of a drop in insect populations associated with pesticide use is higher elsewhere, such as in Africa and South America

"Farmers use too many pesticides," he said. "So the impact of these farming practices in those countries is likely to be much higher than their impact in European countries and North America."

Farmers have to "return to what we did in the past," Sanchez-Bayo said, for example, to re-introduce hedging lines or other habitats to promote different species, some of which would control insects without chemicals.

Although climate change would increase the range of certain insects, the impact on other regions is likely to be negative

"We know that tropical insects are less resistant to temperature changes," he said

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