Navigation Links
Ancient birds from North America colonized the South
Date:7/13/2010

Scientists studying ancient species migration believe northern birds had the ability to colonise continents that southern species lacked. The research, published in Ecography, reveals how the ancient 'land bridge' of Panama, which first connected North and South America, caused an uneven species migration, leading to a new understanding of species diversity today.

The continents of North and South America were historically isolated until they were abruptly joined three million years ago through the tectonic uplift of Central America and the formation of a land corridor in modern day Panama, creating a land bridge.

"This connection allowed an unprecedented degree of intercontinental exchange between species that had been isolated for millions of years," said lead author Brian Tilston Smith from the University of Nevada. "However the relatively poor fossil record has prevented us from understanding how the land bridge shaped New World bird communities."

Using molecular data and phylogenetic evidence from 11 orders, 34 families, and over 100 genera of bird species the team applied a 'molecular clock' to estimate the historical timing of the migration, giving a unique insight into how the ancient history of American bird migration led to present day species diversity across the equator.

The results reveal that while ancient birds could fly most species did not cross the water between the two isolated continents, so were subject to the same constraints as their land based mammalian counterparts. The land bridge was therefore crucial in facilitating cross continental migration.

"This inter-continental migration was far from even. While within the tropics around the equator exchange was equal in both directions, between the temperate zones of North and South America it was not," said Smith. "Avian lineages from the northern Nearctic regions have repeatedly invaded the tropics and radiated throughout South Am
'/>"/>

Contact: Ben Norman
Lifesciencenews@wiley.com
44-012-437-70375
Wiley-Blackwell
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Man-made global warming started with ancient hunters
2. Scientists discover ancient viral invasion that shaped human genome
3. Revealing the ancient Chinese secret of sticky rice mortar
4. Lake-bed trails tell ancient fish story
5. Research shows part of Alaska inundated by ancient megafloods
6. Ancient artifacts reveals as northern ice patches melt
7. Ancient Americans took cold snap in their stride
8. Rare body parts find provides vital clues to identity of ancient fossil
9. Ancient corals hold new hope for reefs
10. Ancient remains put teeth into Barker hypothesis
11. UF researchers: Ancient crocodile relative likely food source for Titanoboa
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ancient birds from North America colonized the South
(Date:11/21/2014)... DALLAS , November 18, 2014 ... Security Systems Market by Systems (Video, RFID, Access Control, ... (SEZ, Factories, Hotels, Banks, Government), Component Service Geography - ... Security Systems Market is projected to be around $25 ... Billion by 2020, growing at a CAGR of 8.69%. ...
(Date:11/21/2014)... NEW YORK , Nov. 19, 2014  Earlier ... Board at New York College, and one of the ... for biosensor signals that are transmitted from Smartphones to ... there were Smartphones and has one of the earliest ... are discussing its usage in the military, child care, ...
(Date:11/21/2014)... , Nov. 20, 2014 Strict laws against ... are piloting the North American and European automotive sector ... growing, gesture recognition systems that are intuitive and able ... in the industry. New analysis from ... Recognition Market in Europe and ...
Breaking Biology News(10 mins):Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4
... been shed on proteorhodopsin, the light-sensitive protein found in ... of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and ... when the ability to respire oxygen is impaired, bacterium ... carry out vital life processes. , ...
... an increased risk of fetal heart problems when mothers ... an abstract presented by Yale School of Medicine researchers ... in San Francisco. , Congenital heart block (CHB) ... heart's electrical signaling from the upper to the lower ...
... system to produce antibodies that act against some essential ... can act against sperm, eggs or reproductive hormones, which ... ova. , Proponents of the technique, which ... as more humane than the conventional methods of controlling ...
Cached Biology News:Shedding new light on proteorhodopsin 2Shedding new light on proteorhodopsin 3Manipulating nature: Scientists query wildlife birth-control method 2
(Date:11/26/2014)... November 26, 2014 PMG Research, Inc. ... PMG Research is a network of sites that provide clinical ... over 2 million patient lives through its partnerships with large ... of 11 hub site locations in the Southeastern United States ... term of the board will be held by: ...
(Date:11/26/2014)... November 25, 2014 Continuing its award-winning ... earned three prestigious MarCom Awards for outstanding creative achievement ... a Platinum MarCom Award, the organization’s top honor, in ... St. Louis held in April of this year. The ... 14,000 attendees. Additionally, Nerium was awarded a Gold MarCom ...
(Date:11/26/2014)... Boston, MA (PRWEB) November 26, 2014 ... and collaboration company is proud to announce that Darren ... Development and Sales. Darren will drive the ... and positive customer experience. , Darren brings ... He has held key roles in channel operations, from ...
(Date:11/26/2014)... , Nov. 25, 2014 Bio-Techne Corporation ... has appointed Robert Gavin to serve in ... the Protein Platforms Division.  Mr. Gavin will be responsible ... segment, which includes the ProteinSimple business acquired in July ... San Jose, California -based ProteinSimple develops ...
Breaking Biology Technology:PMG Research Names Medical Advisory Board 2PMG Research Names Medical Advisory Board 3Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2SoundConnect Appoints Director of Channel Development & Sales 2Bio?Techne Announces Appointment Of Robert Gavin As Leader Of New Protein Platforms Division 2Bio?Techne Announces Appointment Of Robert Gavin As Leader Of New Protein Platforms Division 3
... Back Full Control of Belinostat, Consolidating ... the Global Rights for the Product TopoTarget ... , - Deal Covers a Payment of USD 26 million (DKK ... Payment, - Webcast Conference Call to be Held 2pm CET, ...
... Calif., April 21 Ortho Evra is an adhesive,transdermal birth ... and 20 mcg of ethinyl estradiol into the bloodstream per ... and no patch is worn,during the fourth week. Ortho Evra ... million women have used Ortho Evra since its approval.,Ortho Evra ...
... Pharmacyclics,Inc. (Nasdaq: PCYC ) today announced that ... 17, 2008 indicating that, for the last 30,consecutive ... has closed,below the minimum bid price of requirement ... Nasdaq Global Market under Marketplace Rule 4450(a)(5). In,accordance ...
Cached Biology Technology:TopoTarget Successfully Buys Back Full Control of Belinostat 2TopoTarget Successfully Buys Back Full Control of Belinostat 3TopoTarget Successfully Buys Back Full Control of Belinostat 4TopoTarget Successfully Buys Back Full Control of Belinostat 5TopoTarget Successfully Buys Back Full Control of Belinostat 6TopoTarget Successfully Buys Back Full Control of Belinostat 7Ortho Evra Patch Makers Settling Cases 2
... The 7500ce meets the demands of ... require high performance from reliable, robust and ... unmatched detection power in the most challenging ... It is equally suited to the toughest ...
... using Mo Bio luciferase assay. Mo Bio Laboratories ... will allow you to certify your products ATP-Free ... you to deliver them to your customers in ... limit is 3.5 x 10-12 /l, which will ...
... LC Sciences provides a comprehensive microarray ... regulatory/functional RNA embedded within non-coding RNAs ... and proprietary probe design, which enables ... of small RNAs (1). This comprehensive ...
Best pricing for 100mg-1.0g scales. Phosphopeptides are our specialty....
Biology Products: