viernes, 27 de enero de 2017

Climate change helped kill off super-sized Ice Age animals in Australia


1/3. Cuddie Springs is the only site in mainland Australia that has produced in situ fossil evidence of the co-existence of humans and megafauna... (Judith Field / University of New South Wales)

... A new study has compared the diet of a variety of Australian megafaunal herbivores from the period when they were widespread (350,000 to 570,000 years ago) to a period when they were in decline (30,000 to 40,000 years ago) by studying their fossil teeth. The analysis suggests that climate change had a significant impact on their diets and may well have been a primary factor in their extinction.

“We have found evidence that, as the climate was changing and getting drier, animal diets were shifting dramatically,” said Larisa DeSantis, assistant professor of earth and environmental studies at Vanderbilt University, who directed the study. “If climate change was a primary or contributing factor in their demise, as it appears, we need to pay more attention to how current levels of climate change are affecting animals today.”

The results of the study are described in a paper titled “Dietary responses of Sahul (Pleistocene Australia-New Guinea) megafauna to climate and environmental change” published on Jan. 25 by the journal Paleobiology. Co-authors on the paper are Judith Field and John Dodson... (Video) Vanderbilt University

Vídeo: Climate Change Helped Kill Off Super-Sized Ice Age Animals in Australia - Vanderbilt University
Ver en PaleoVídeos > L.R.2.12 nº 8.