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:4/17/2014)... honored Clemson professor Rajendra Singh Thursday as a ... and expand solar deployment in the residential, commercial ... Banks Professor of Electrical and Computer Engineering and ... considered a local hero leading the charge across ... in solar power and driving policy changes at ...
(Date:4/17/2014)... the Amazon help create tinderbox conditions for wildfires ... forest loss during drought years, according to a ... in the Amazon could reach a "tipping point" ... to large-scale loss of trees, making recovery more ... Penn State. , "We documented one of the ...
(Date:4/17/2014)... a stark warning on the possible effects of gases ... 32 times that of carbon dioxide. Now a team ... as fully regenerable electron acceptors which helps explain why ... of being released to the atmosphere. However, there are ... enter into a vicious cycle to release large amounts ...
Breaking Biology News(10 mins):White House honors Clemson professor as 'Champion of Change' for solar deployment 2Drought and fire in the Amazon lead to sharp increases in forest tree mortality 2Drought and fire in the Amazon lead to sharp increases in forest tree mortality 3Methane climate change risk suggested by proof of redox cycling of humic substances 2
(Date:1/14/2014)... MA (PRWEB) January 14, 2014 iLab Solutions, ... Detwiler as the new Director of Product Strategy. In this ... well as iLab sub-teams to guide in the development of ... iLab provides the maximum possible benefit to the scientific community ...
(Date:1/14/2014)... 2014  RXi Pharmaceuticals Corporation (OTCQX: RXII), a biotechnology ... therapies addressing major unmet medical needs using RNA-targeted ... of Allowance from the United States Patent and ... (sd-rxRNA®), for the treatment of fibrosis. The patent ...
(Date:1/14/2014)... 2014   Kinaxis ®, provider of RapidResponse ®, a ... operations planning ( S&OP ) service, is proud to be ... will be held at the Hilton San Diego Bayfront, January ... Elisabeth Kaszas , Director of Supply Chain at Amgen, ...
(Date:1/14/2014)... 14, 2014 Kerr Corporation, a leading manufacturer ... additional how-to information about dual arch impressions on its dental ... Arch Impressions,” the blog entry serves up a list of ... a step-by-step demonstration by Dr. David Little as he crafts ...
Breaking Biology Technology:iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
Cached News: