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
202-786-2094 x8216
Smithsonian Tropical Research Institute

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:

(Date:9/28/2015)... Sept. 28, 2015 CLEAR, the ... its expedited traveler service is coming to ... travel, bringing a frictionless experience, serious speed ... "CLEAR offers our travelers an expedited ... said Jim Smith , Executive Director, ...
(Date:9/28/2015)... 28, 2015 Synaptics Inc. (NASDAQ: SYNA ... announced that Lenovo has selected Synaptics , Natural ... its latest smartphone, the Vibe P1. The new ... the device and provide swift access to applications and ... Natural ID FS4202 sensor solution utilizes AES256-bit encryption of ...
(Date:9/10/2015)... -- This report provides detailed descriptions of the sensor ... sensor types that will dominate in the future. Many ... wearable technology hype curve in the last five years ... with all of them is the prominence of sensor ... functions. Sensors collect data about the physical and chemical ...
Breaking Biology News(10 mins):
(Date:10/8/2015)... October 8, 2015 http://www.GoldmanResearch.com ... --> Goldman Small Cap Research, a ... cap and microcap sectors, announced today that it ... PharmaCyte Biotech, Inc. (OTCQB - PMCB), a publicly ... and preparing treatments for cancer and diabetes. To ...
(Date:10/8/2015)... 8, 2015 /PRNewswire/ - RepliCel Life Sciences Inc. (OTCQB: REPCF) ... on the development of autologous cell therapies, today announced its ... taking place in the month of October: ... RepliCel will be presenting at the annual Partnering ... Mesa to be held October 7-9 in ...
(Date:10/8/2015)... Claremont, CA (PRWEB) , ... October 08, 2015 ... ... by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene and results ... abnormally viscous and sticky mucus accumulates in the lungs. This mucus is very ...
(Date:10/7/2015)... 7, 2015  ChromaDex Corp. (OTCQX: CDXC), an ... that creates science-based solutions for dietary supplement, food ... products, today announced that the October 1 presentation ... is now available for on-demand viewing at VirtualInvestorConferences.com. ... http://tinyurl.com/101postpr   --> LINK: ...
Breaking Biology Technology:
Cached News: