HOME >> BIOLOGY >> NEWS
Ocean invaders in deep time

Much has been made of the economic impacts of recent biological invasions, but what are the implications of invasions in deep time? Luiz Rocha leads geneticists who time travel through ocean environments. The results of their travels, published online in Molecular Ecology, tell us that during warm, interglacial periods, reef-associated fish (goby genus Gnatholepis), leapt around the horn of Africa into the Atlantic, where their range expanded as the world warmed.

"We found that global warming events correspond clearly with major range expansions of gobies from the Indian Ocean into the Atlantic Ocean and subsequently into the Eastern Atlantic," summarizes Rocha. A chilly Antarctic current--the Benguela upwelling system-- surges up along the western coast of Africa acting as a natural barrier, and has prevented most warm water organisms from the Indian Ocean from making it in to the Atlantic for the last 2 million years. But when the world warmed about 150,000 years ago, gobies slipped around the corner of the continent.

Researchers at the Smithsonian Tropical Research Institute, Scripps Institution of Oceanography, Hofstra University and the University of Hawaii, sequenced goby DNA (774 pb of the mtDNA of cytochrome b, to be exact) from the western, central and eastern Atlantic Ocean. They also sequenced DNA from gobies in the same genus from South Africa, from the Cocos Keeling Islands in the eastern Indian Ocean, and from the Cook Islands in the South Pacific. They calculate the approximate amount of time that isolated groups of fish have been separate based on the differences in the DNA between groups.

What evidence do they have that makes them think that Atlantic gobies are invaders? "The Atlantic goldspot goby certainly is a prime candidate-it's the only species of the genus in the Atlantic and there are eight species and subspecies in the Indo-Pacific. It's really similar to a sister taxon in the Indian Ocean," Rocha continues. "
'"/>

Contact: Beth King
kingb@si.edu
202-786-2094 x8216
Smithsonian Tropical Research Institute
13-Oct-2005


Page: 1 2

Related biology news :

1. West African Ocean sediment core links monsoons to global climate evolution
2. Climate change signal detected in the Indian Ocean
3. Ocean observing contracts awarded to UC San Diego and University of Washington
4. Oceans twilight zone may be a key to understanding climate change
5. AAAS Oceans Panel examines advances in science and technology to boost fishery sustainability
6. Ocean governance: Evolving systems
7. Scientists discover new life forms in the Arctic Ocean
8. New study links western wildfires to Atlantic Ocean surface temperatures
9. Ocean temperature predicts spread of marine species
10. Ocean sampling yields environmental sources of coral symbionts
11. Continued warming of the Arctic Ocean

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Ocean invaders deep time

(Date:4/27/2015)... , Apr. 27, 2015 Profile Solutions, Inc. ... and security systems is pleased to announce that Dr ... a consultant and member of its scientific advisory board. ... known as a thought leader in technology-enhanced learning models. ... Group, and has published studies and books focused on ...
(Date:4/14/2015)... NEW YORK , April 14, 2015 /PRNewswire/ ... Fast IDentity Online (FIDO ® ) Alliance tm ... standards-based specifications. FIDO members commit to share technology ... authentication methods that are interoperable, more secure and ... specifications enable biometric identity verification that protects sensitive ...
(Date:4/9/2015)... Calif. , April 9, 2015 Synaptics ... interface solutions, announced today that it will report financial ... Thursday, April 23, 2015, after the close of market. ... analysts and investors at 2:00 p.m. PT (5:00 p.m. ... To participate on the live call, analysts ...
Breaking Biology News(10 mins):Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 4HYPR Corp. Joins the FIDO Alliance 2HYPR Corp. Joins the FIDO Alliance 3Synaptics to Report Third Quarter Results on April 23 2
(Date:5/21/2015)... 21, 2015 Specialty Pharmacy Times ... been admitted to BPA Worldwide as a business ... track audience data for Specialty Pharmacy Times based ... “By becoming a member of BPA Worldwide, Specialty ... our clients with the most reliable, unequaled data,” ...
(Date:5/21/2015)... May 21, 2015 uBiome, the ... a partnership with PicnicHealth, a healthcare company that ... diagnosed with Inflammatory Bowel Disease (IBD) will receive ... complementary uBiome research kit. Both companies were funded ... , For more information on this partnership ...
(Date:5/21/2015)... 2015 W. R. Grace & ... in Worms, Germany has received good manufacturing practice ... the International Pharmaceutical Excipient Council (IPEC) Foundation. ... its SYLOID® FP brand of pharmaceutical grade excipient ... the Curtis Bay, Maryland (USA) and Sorocaba, Brazil ...
(Date:5/21/2015)... As part of its philanthropic partnership with Banner ... funded a $3.25 million project to relocate and equip ... up-to-date features and technology. , The new pharmacy is ... members will begin moving from the current location to ... , The current pharmacy has been using a ...
Breaking Biology Technology:Specialty Pharmacy Times Joins BPA Worldwide 2uBiome Partners with PicnicHealth 2uBiome Partners with PicnicHealth 3Grace European Facility Receives GMP Excipient Certification for SYLOID® FP Silica Gel 2Sun Health Foundation Provides $3.25M to Expand, Relocate Banner Del E. Webb Medical Center Pharmacy 2Sun Health Foundation Provides $3.25M to Expand, Relocate Banner Del E. Webb Medical Center Pharmacy 3
Cached News: