As full populations of vertebrates decline, the effects are felt "on vegetation and habitat", he added, putting full ecological networks in danger as they depend on the balance between plants, microorganisms, and animals. As Doug Erwin of the Smithsonian Institution tells The Atlantic, the PNAS study examines losses over the short term-a century-and compares them to extinctions over millennia.
In the research which was published on Monday in the Proceedings of the National Academy of Sciences journal, the experts from the Standford University and the National Autonomous University of Mexico revealed a minute and detailed look at the trends in population among 27,600 species of amphibians, birds, reptiles and mammals - half of the terrestrial vertebrates known in the world which also included the detailed analysis of around 177 mammals species.
The scientific researchers deem the biological annihilation the study describes as a "frightening assault" on the very foundations upon which human civilization is built.
Earth's sixth mass extinction is already underway, meaning thousands of species are at risk of disappearing forever, scientists have warned. For it, the study team mapped the ranges of almost half of all the known terrestrial vertebrate species.
"It is a prelude to the disappearance of many more species and the decline of natural systems that make civilisation possible", he said.
A biological destruction of wildlife in recent years hints at a sixth mass extinction in Earth's history and it is feared to be more intense than the previous ones.
The study was co-written by Universidad Nacional Autónoma de México ecology professor Gerardo Ceballos, along with Stanford University's Paul R. Ehrlich and Rodolfo Dirzo. Trump has the keys to nuclear weapons, and could end work to prevent climate change.
An alarming new study finds that, of 177 mammals analysed, all have lost at least a third of their range while more than 40 per cent have lost more than 80 per cent - in just 25 years.
"Several species of animals that were relatively safe there are ten or twenty years", such as lions and giraffes, are now in danger", according to this study.
"All signs point to ever more powerful assaults on biodiversity in the next two decades, painting a dismal picture of the future of life, including human life", it added. "Humanity will eventually pay a very high price for the decimation of the only assemblage of life that we know of in the universe", according to the findings in the report claiming a sixth mass extinction event is approaching.
Researchers did not state how long it predicted the human race to survive, but said there was scope to 'address the decay of biodiversity'. "[Now] the vast majority of lion populations are gone".
"Population extinctions today are orders of magnitude more frequent than species extinctions".
About 375-359 million years ago, major environmental changes caused a drawn-out extinction event that wiped out major fish groups and stopped new coral reefs forming for 100 million years.
The big one - more than 95% of species perished, including trilobites and giant insects - strongly linked to massive volcanic eruptions in Siberia that caused a savage episode of global warming.