Human footprint driving mammal extinction crisis

November 9, 2018, University of Queensland
Human footprint driving mammal extinction crisis
The Malay Tapir has moved from Vulnerable to Endangered on the IUCN Red List, due to large-scale deforestation associated with increased hunting. Credit: Tambako

Human impacts are the biggest risk factor in the possible extinction of a quarter of all land-based mammals, according to a University of Queensland study.

Researchers compared a 16-year trend in the global human footprint with the of around 4500 land-based .

UQ School of Earth and Environmental Sciences Adjunct Fellow Dr. Moreno Di Marco said the analysis redefined how we looked at mammal extinctions.

"We live in an era when one in every four mammal species is at risk of going extinct," he said.

"But with more than 5600 mammal species globally, it's time consuming and expensive to track the changes for every species.

"To get a clearer idea of what's systematically leading to these declines, we decided to combine mapping of human pressures with extinction risk assessment data for mammal species."

The researchers found that human footprint was linked strongly to extinction risk change for land-based mammals – more than any other variable they tested.

"Human impacts in areas originally in a natural or semi-natural state – those with a footprint of only three or below on a zero-to-50 scale – were the main driver of extinction risk change in ," Dr. Di Marco said.

Human footprint driving mammal extinction crisis
Anthropogenic modification of natural habitats is the main driver of mammal species decline globally.  Credit: University of Queensland
"In terms of conservation efforts, it makes us look twice at what high-impact human activities really are, since even seemingly low-level impacts are decimating species."

UQ's Professor James Watson said the findings were invaluable for future conservation efforts.

"What we've created has huge potential to provide rapid assessment of species extinction risk, without having to go through extensive expert consultation every time," he said.

"It has the potential to change how we assess biodiversity conservation status globally.

"The international community has a mission to prevent the decline of species, and this research will assist in the critical job of prioritising actions for minimising species .

"They need to see the big picture, before it's too late."

The study has been published in Nature Communications.

Explore further: Australia's mammal extinction rate could worsen: scientists

More information: Moreno Di Marco et al. Changes in human footprint drive changes in species extinction risk, Nature Communications (2018). DOI: 10.1038/s41467-018-07049-5

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Surveillance_Egg_Unit
5 / 5 (1) Nov 10, 2018
I have wondered for a long time why there isn't more advertising in all countries to get all the people involved in saving these animals. We do it for dogs, cats, birds and other pets, after all. The public doesn't seem to be quite aware of what is happening, mainly because it isn't drummed into their psyche enough to make a difference so that they will be more aware and do all they can to prevent the losses of these animals. News media, radio and TV personalities could do a lot to inform the public of what will happen, not only to animals but also to humans if things don't change very soon.

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