The signs of death are everywhere, if you look. For years, scientists have rung the alarm bell, warning that grave declines in animal biodiversity around the globe herald the onset of what will be Earth's sixth mass extinction.
examining invertebrate declines, the researchers suggest between 7.5 to 13 percent of all the roughly 2 million known plant and animal species on Earth could have gone extinct since 1500 CE – an extinction toll orders of magnitude greater than what the IUCN recognizes.
"Current extinction rates, notably in terrestrial invertebrates, are far higher than background extinction rates,""We also show that use of IUCN Red List extinction data to determine current extinction rates inevitably leads to dramatic under-estimation of rates, except for birds, mammals and perhaps amphibians."
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