technology-news

Evolution of flowering plants may have led to decline of early mammals

Washington, Oct. 3 : The dramatic explosion of flowering plant species about 100 million years ago could have led to the decline of the early mammal varieties, a new study has suggested.


In the study, David Grossnickle, now a doctoral student at the University of Chicago and P. David Polly, a professor in the Department of Geological Sciences in the College of Arts and Sciences, present evidence that mammal varieties declined during the great angiosperm radiation of the mid-Cretaceous, a time when a great diversity of flowering plants appears in the fossil record.

Grossnickle said that at the middle of the Cretaceous, a time when the early angiosperms are radiating, we find a surprising decrease in the diversity of mammals.

He said that it's not until the end of the Cretaceous, close to the time of the extinction of the dinosaurs, that we actually see a rebound in mammalian diversity and the first appearance of purely herbivorous mammals.

Previous literature suggested the spread of angiosperms, along with the evolution of pollinating insects, may have spurred an increase in the diversity of mammals. The idea made sense: The radiation would likely have resulted in more food sources from seeds, fruits, leaves and insects.

Grossnickle and Polly found, however, that while the number of mammal species may have increased, their variety decreased. Most of the mammals that survived were small, insect-eating animals.

The study has been published in the journal Proceedings of the Royal Society B.

--ANI (Posted on 03-10-2013)

technology-news headlines

Speed-reading apps may impair reading ability: Study

Read tough data sheets on tablets with this device

Cow manure has new antibiotic resistance genes: Study

Soon, futuristic gadget that uses voice to control all aspects of home

Missing Xenon gas may be resting in earth's belly: Study

Wireless speaker with light sensors, microphone

An 'upside-down planet' discovered

Google search, navigation preferred apps among drivers

Biofuels from corn less beneficial than reported: Study

Smart cup that delivers coffee, news too!

In a first, stem cells cloned from human skin

Bulletproof vests from stem cells?

Quick Links: Goa | Munnar | Pondicherry | Free Yearly Horoscope '2014

Comments

Your e-mail:


Your Full Name:


Type verification image:
verification image, type it in the box

Message:

Back to Top