ANU identifies mammals in need

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Lemur. Image: Mathias Appel, Flickr.
A NEW study led by ANU has mapped priority areas around the world to protect thousands of mammal species, with a focus on species with few close relatives such as echidnas in Australia and PNG and lemurs in Madagascar.

Lead researcher Dr Dan Rosauer says the team used maps of about 4700 land mammals’ habitats, and information on how species are related to each other, to identify important places across the world for protecting the world’s mammal diversity.

The study identified the top places in every continent, including parts of coastal Queensland, Australian deserts near Alice Springs, Sumatra and Java, Madagascar, India, China and Spain.

“Habitat loss is a major threat to the world’s mammal species – over 1000 mammal species are already threatened,” says Dr Rosauer.

He says targeting conservation efforts in areas that provide the most benefit is critical, because resources – particularly land and money – are limited.

“Scientists have often focused on the number of species in a protected area, but studies like this one consider the degree to which the family tree of life is well represented,” Dr Rosauer says.

“This study seeks to protect all land mammals, but it gives top priority to species with no close relatives, because if they were lost there would be nothing like them left.

“This is the first time that anyone has mapped these priority areas for conserving the diversity of mammal evolution along with minimum target areas for habitat protection.

“People are already working on these challenges, but by using this cutting-edge genetic information we can make far better decisions, protecting up to 32 per cent more of the diversity of the mammal tree of life through better use of limited resources.”

Animals with few close relatives include the echidna and platypus in Australia, the lemur in Madagascar, the aardvark in Africa, and the mouse-like marsupial monito del monte in South America.

“The platypus and echidna separated from each other around 25 million years ago,” Dr Rosauer says. “And they split from the rest of the early mammals way back in the time of the dinosaurs.

“By targeting areas with these really unique species, you would also protect a lot of other species too.”

Co-researcher Dr Simon Linke from Griffith University says the research findings have many potential applications.

“We hope to see this approach adopted by conservation professionals,” Dr Linke says.

“As we designed this around readily available conservation software, we can now trade off threats or use the family tree of life in applications like expansions of National Parks.”

ANU worked on this research with University Grenoble Alpes in France, Griffith University in Queensland and Yale University in the United States.

The research is published in “Proceedings of the Royal Society B”


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