About Careers Internship MedBlog Contact us
Medindia LOGIN REGISTER
Advertisement

Extinction Leads To Species Diversity Among Terrestrial Vertebrates

by Shirley Johanna on November 28, 2015 at 5:49 PM
Font : A-A+

Extinction Leads To Species Diversity Among Terrestrial Vertebrates

Scientists have found that periods of high extinction on Earth have been the drivers of the diversification of today's dominant land vertebrates, including reptiles, birds, and mammals.

Mass extinctions among some groups of amniotes coincide with numerous and large diversifications in other closely related groups, the findings showed.

Advertisement

The research challenges commonly held views that support a relationship between the evolution of "key innovations" in a group and the rapid increase in its number of species.

"Our results go against many of the traditional predictions from evolutionary biology, and show that the scientific views about the relevance of key innovations should be carefully reconsidered," said study co-author Johannes Muller, professor at Museum fur Naturkunde in Berlin, Germany.
Advertisement

The study examined the issue of adaptive radiations among early amniotes, from 315 to 200 million years ago.

The concept of adaptive radiation is central to modern evolutionary biology. An adaptive radiation is an extremely rapid increase in the number of species in a group, often as a result of a key evolutionary innovation, which gives the group an advantage over its competitors or allows it to exploit a new resource.

Often, if the appearance of an evolutionary novelty coincides temporarily with a large increase in species richness, it is assumed that the innovation is responsible for this pattern.

The scientists used statistical methods to identify which of the amniote groups present during this time were significantly more species-rich than their close relatives, and attempted to identify the factors responsible for this diversity imbalance.

The results showed that usually, large differences in diversity between two closely related groups are not because more species evolve in the larger group, but rather because more species of the smaller group go extinct.

The study was published in the journal Scientific Reports.

Source: IANS
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
What's New on Medindia
Alarming Cesarean Section Trends in India - Convenience or Compulsion of Corporate Healthcare
Quiz on Low-Calorie Diet for Diabetes
World Heart Day in 2022- Use Heart for Every Heart
View all
News Archive
Date
Category
Advertisement
News Category

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

Most Popular on Medindia

The Essence of Yoga Selfie Addiction Calculator How to Reduce School Bag Weight - Simple Tips Loram (2 mg) (Lorazepam) Blood Donation - Recipients Calculate Ideal Weight for Infants Hearing Loss Calculator A-Z Drug Brands in India Blood - Sugar Chart Drug - Food Interactions
This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use
×

Extinction Leads To Species Diversity Among Terrestrial Vertebrates Personalised Printable Document (PDF)

Please complete this form and we'll send you a personalised information that is requested

You may use this for your own reference or forward it to your friends.

Please use the information prudently. If you are not a medical doctor please remember to consult your healthcare provider as this information is not a substitute for professional advice.

Name *

Email Address *

Country *

Areas of Interests