Clues from analysis of fish bones supports theory of climate shift 5000 years ago, onset of El Nio

ATHENS, Ga. - New evidence from two Peruvian archeological sites excavated by researchers from the University of Maine (UMaine) and analyzed by University of Georgia (UGA) scientists supports the theory that a climate shift about 5,000 years ago led to modern weather patterns that include El Nio. The details are presented in an article in this week's edition of the journal Science.

The lead author is C. Fred T. Andrus, a postdoctoral associate at UGA. Co-authors include Douglas E. Crowe, Elizabeth J. Reitz and Christopher S. Romanek of UGA and Daniel H. Sandweiss of UMaine. Romanek also works at the Savannah River Ecology Laboratory in Aiken, S. C. The paper presents the results of chemical analyses of fish bones known as otoliths from a species of sea catfish (Galeichthys peruvianus) living along the Peruvian coast.

"Our data strengthen the argument that El Nio, as we know it, began relatively recently - since 5000 years ago," said Andrus. (El Nio is, in large part, warming of the ocean waters off Peru at irregular intervals.) "This is more evidence that climate change is the norm, and climate stability is the exception in the earth's history, even in relatively recent times. Given the enormous global impact of El Nio, it's important to understand that climate is a naturally variable system, and that just six thousand years ago El Nio was less frequent."

Andrus said that otoliths from sea catfish are a good candidate for such analysis because the fish do not migrate. They tend to stay near shore in relatively small areas away from river mouths where fresh water can complicate the oxygen results.

"Otoliths act like miniature temperature recording devices," said Crowe. "Throughout the life of a fish, they grow concentrically larger, and the ratio of oxygen isotopes in each individual growth band allows us to determine the temperature of the water at that time. By looking at the entire otolith, we can reconstruct the water temperatu

Contact: Phil Williams
University of Georgia

Page: 1 2 3

Related biology news :

1. How wounds heal Clues from flies
2. Shadow proteins in thymus - Clues to how immune system works?
3. Clues to the evolution of photosynthesis
4. Clues to development of eyes light-sensitive cells found
5. Fossilized Emu Eggshells Give Clues To 65,000 Years Of Vegetation And Climate Changes In Australia
6. Ant-Fungus Relationship May Provide New Clues About Antibiotics
7. Jumpin Jordan! Athletic Gene Yields Biological Clues
8. Structure Of Fat-Depleting Protein Reveals Important Functional Clues
9. Model Polymers Reveal New Clues to Protein Folding
10. Study Finds Protein Clues To Early Embryo Development
11. New Clues To Evolution Of Human Brain

Post Your Comments:

(Date:7/31/2020)... FREDERICK, Md. (PRWEB) , ... July 30, 2020 ... ... Business Innovation Research (SBIR) Phase II contract awarded by the Joint Science & ... goal of this project is to develop, optimize, and scale-up a highly efficient ...
(Date:7/18/2020)... ... July 17, 2020 , ... Commercial launch readiness is a critical ... discover a COVID cure or vaccine, the global economic downturn will only increase price ... not going away and capturing full value from every product launch is critical. However, ...
(Date:7/2/2020)... Calif. (PRWEB) , ... July 01, 2020 , ... ... company, presented its phase 1a findings of Neihulizumab, a biologic for the treatment ... in June 2020. Led by hemato-oncologist Dr. Paul J Martin of the Fred ...
Breaking Biology News(10 mins):
(Date:7/10/2020)... ... July 09, 2020 , ... ... is commonly used to suppress pigment formation in zebrafish embryos, maintaining optical transparency ... led by Dr MA has been using the zebrafish model to investigate the ...
(Date:7/7/2020)... ... ... R3 International is now offering stem cell therapy for Alzheimers dementia in ... the patient's condition, treatment may be offered IV, intrathecal or with a combination. , ... dementia, and the incidence continues to increase as individuals live longer. There is no ...
(Date:7/1/2020)... ... June 29, 2020 , ... MedShift , a ... 2020, despite many obstacles created as a result of COVID-19. As a provider ... partnered medical practices and medical manufacturers by expanding access to device offerings, technology ...
(Date:7/1/2020)... , ... June 30, 2020 ... ... tissue data insights, today announced that the launch of a new ... with data about the tumor microenvironment (TME). , “Flagship’s TissueInsight is a ...
Breaking Biology Technology:
Cached News: