SIB News


Current diversity pattern of North American mammals a ‘recent’ trend

In a study of fossils spanning 63 million years, University of Illinois animal biology professor Jonathan Marcot and his colleagues found that current patterns of mammal biodiversity in North America are a relatively recent phenomenon.

It’s called the latitudinal diversity gradient, a phenomenon seen today in most plant and animal species around the world: Biodiversity decreases from the equator to higher latitudes. A new study of fossils representing 63 million of the past 65 million years reveals that – for North American mammals, at least – the modern LDG is the exception rather than the rule.

The findings, reported in the Proceedings of the National Academy of Sciences, point to the importance of not assuming that the way things are today is the way they’ve always been, the researchers say.

Read the full article at the Illinois News Bureau

Publication Date: 06/13/2016
Photo credits: L. Brian Stauffer
Editor: Diana Yates