HOME >> BIOLOGY >> NEWS
Biologists uncover Darwins missing evidence for divergence of species in a warblers song

Biologists at the University of California, San Diego have demonstrated, in a study of the songs and genetics of a series of interbreeding populations of warblers in central Asia, how one species can diverge into two.

Their description of the intermediate forms of two reproductively isolated populations of songbirds that no longer interbreed is the "missing evidence" that Darwin had hoped to use to support his theory of natural selection, but was never able to find.

"One of the largest mysteries remaining in evolutionary biology is exactly how one species can gradually diverge into two," says Darren E. Irwin, a biologist at UCSD who headed the study, detailed in the January 18 issue of the journal Nature. "This process, known as speciation, is very difficult to study because it can take a great deal of time to occur."

Biologists have generally learned about the divergence of species by comparing many different species at various stages of speciation. But in their study of the greenish warbler, a songbird that breeds in forests throughout much of temperate Asia, Irwin and his colleaguesTrevor D. Price, a biology professor at UCSD, and Staffan Bensch, a former postdoctoral student at UCSD now at Swedens Lund

Universitydiscovered a rare situation known to biologists as a "ring species.""Ring species are unique because they present all levels of variation, from small differences between neighboring populations to species-level differences, in a single group of organisms," says Irwin, a former student of Price who is in the process of beginning his postdoctoral work with Bensch at Lund University.

In the case of the greenish warbler, Phylloscopus trochiloides, the scientists discovered a continuous ring of populations with gradually changing behavioral and genetic characteristics encircling the Tibetan Plateau, which is treeless and uninhabitable. This ring is broken by a species boundary at only one place, in central Siberia, where two forms of t
'"/>

Contact: Darren Irwin
greenishwarbler@hotmail.com
46-706-827864
University of California - San Diego
16-Jan-2001


Page: 1 2 3

Related biology news :

1. Biologists deciphering complex lemur scent language
2. Biologists ID defense mechanism of leading fungal pathogen
3. Biologists discover nerve activity, not just genetics controls kinds of neurotransmitters produced
4. Biologists uncover genetic links to broad range of human disorders resulting from cilia dysfunctions
5. American Society of Plant Biologists offers developing nations free access to science journals
6. Open access initiative from the Company of Biologists
7. Biologists find unexpected rapid evolution in Caribbean lizards
8. American Society of Plant Biologists Annual Meeting 2003
9. Biologists raising baby loggerhead turtles for conservation find disturbing gender trend
10. Biologists new experiment may vindicate Darwin
11. Biologists take new look at metabolism

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/5/2020)... ... June 04, 2020 , ... “Although we are disappointed ... well-being of our attendees, staff, and the public. We remain committed to creating ... ways to collaborate virtually,” said Julie Sutcliffe, President of WMIS. , ...
(Date:5/28/2020)... ... May 27, 2020 , ... Today ... , a solution that uniquely combines lab testing insights and hc1’s exclusive Local ... the ongoing health and safety of employees returning to the workplace. , “Some ...
(Date:5/21/2020)... ... May 21, 2020 , ... ClearStar, ... medical screening, announces the launch of a testing service aimed at supporting ... new service is provided by ClearStar’s Medical Information Services (“MIS”) business through ...
Breaking Biology News(10 mins):
(Date:5/26/2020)... ... 2020 , ... Brilliant , the leading smart home control and lighting ... announce a new integration to bring more convenience, simplicity, and security to the smart ... Connect® can now be controlled from Brilliant’s in-wall touchscreen control panels and mobile app. ...
(Date:5/21/2020)... ... ... Eaton Square is pleased to announce its growth on the East Coast of ... strategy and M&A advisory firm. , This is an important step for Eaton Square ... healthcare innovators with capital and investors. , Popper and Company, founded in 2003 by ...
(Date:5/15/2020)... ... 2020 , ... Children with defective heart valves often have ... adults. The reason: there are no heart valve prosthetics designed to grow with ... Defense has awarded Draper, Boston Children’s Hospital and Seattle Children’s Research Institute a ...
(Date:5/14/2020)... ... May 12, 2020 , ... DuPont ... new distribution partner for all personal care ingredients in Russia and Belarus. Beginning ... DuPont preservative portfolio for personal care. , The GENENCARE®OSMS product line ...
Breaking Biology Technology:
Cached News: