Navigation Links
Scientist creates new hypothesis on ocean acidification
Date:8/30/2011

Since the beginning of the Industrial Revolution, the concentration of carbon dioxide in the atmosphere has been rising due to the burning of fossil fuels. Increased absorption of this carbon by the oceans is lowering the seawater pH (the scale which measures how acidic or basic a substance is) and aragonite saturation state in a process known as ocean acidification. Aragonite is the mineral form of calcium carbonate that is laid down by corals to build their hard skeleton. Researchers wanted to know how the declining saturation state of this important mineral would impact living coral populations.

Much of the previous research has been centered on the relationship between coral growth and aragonite levels in the surface waters of the sea. Numerous studies have shown a direct correlation between increased acidification, aragonite saturation, and declining coral growth, but the process is not well understood. Various experiments designed to evaluate the relative importance of this process have led to opposing conclusions. A recent reanalysis conducted by Dr. Paul Jokiel from the Hawai'i Institute of Marine Biology (HIMB), suggests that the primary effect of ocean acidification on coral growth is to interfere with the transfer of hydrogen ions between the water column and the coral tissue. Jokiel re-evaluated the relevant data in order to synthesize some of the conflicting results from previous ocean acidification studies. As a result, Jokiel came up with the "proton flux hypothesis" which offers an explanation for the reduction in calcification of corals caused by ocean acidification.

In the past, scientists have focused on processes at the coral tissues. The alternative provided by Jokiel's "proton flux hypothesis" is that calcification of coral skeletons are dependent on the passage of hydrogen ions between the water column and the coral tissue. This process ultimately disrupts corals' ability to create an aragonite skeleton. Lowered calcification rates are problematic for our coral reefs because it creates weakened coral skeletons leaving them susceptible to breakage, and decreasing protection.

Dr. Jokiel is excited about this work; he states that "this hypothesis provides new insights into the importance of ocean acidification and temperature on coral reefs. The model is a radical departure from previous thought, but is consistent with existing observations and warrants testing in future studies". In general, this hypothesis does not change the general conclusions that increased ocean acidification is lowering coral growth throughout the world, but rather describes the mechanism involved.


'/>"/>

Contact: Carlie Wiener
cwiener@hawaii.edu
808-235-9303
University of Hawaii ‑ SOEST
Source:Eurekalert

Related biology news :

1. Scientists find new drug candidates for set of protein-folding diseases
2. Weight loss without the hunger: Cornell scientists say eat a lighter lunch
3. Scientists receive grant to develop new DNA sequencing method
4. Cars could run on recycled newspaper, Tulane scientists say
5. Scientists create natural Alzheimers-fighting compound in lab
6. Scientists reengineer antibiotic to overcome dangerous antibiotic-resistant bacteria
7. Scripps Research scientists help pinpoint cause of stress-related DNA damage
8. Penn molecular scientists develop color-changing stress sensor
9. Scientists discover the most primitive living eel
10. Scripps Research scientists expand knowledge of cell process involved in many diseases
11. Scientists find easier, cheaper way to make a sought-after chemical modification to drugs
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/28/2017)... , Feb. 28, 2017   Acuant , a ... globally, announces significant enhancements to new and core technologies ... New products include mobile and desktop Acuant FRM TM ... - a real time manual review of identity ... technology provides the fastest and most accurate capture software ...
(Date:2/26/2017)... , Feb. 25, 2017  Securus Technologies, a ... solutions for public safety, investigation, corrections and monitoring, ... and Reentry. "Too often, too many ... and county jails are trying to tackle this ... and friends and family members. While significant steps are ...
(Date:2/21/2017)... , February 21, 2017 Der ... US-Dollar wachsen. Nach einem Gespräch mit mehr als 50 Vertretern ... Hindernisse zu überwinden gilt, um diese Prognose zu realisieren. ... ... die Mobilisierung der finanziellen Mittel für die Biobank, die ...
Breaking Biology News(10 mins):
(Date:3/30/2017)... , March 30, 2017 In ... Inc. (NASDAQ: AGEN), Intrexon Corp. (NYSE: XON), Progenics Pharmaceuticals ... CXRX ). According an article on Barron,s, Credit ... Weight" on Tuesday, March 21 st , 2017. These stocks ... for free at: ...
(Date:3/29/2017)... Inc. (NASDAQ: VRML), a bio-analytical solutions company focused ... the fourth quarter and full year ended December ... year for us with our first clinical utility ... reimbursement progress with Medicare, positive medical policy coverage ... cleared our 2 nd generation product Overa ...
(Date:3/29/2017)... PETACH TIKVAH, Israel , ... Inc. (NASDAQ: BCLI), a leading developer of ... announced financial results for the year ended ... a highly successful and pivotal year for Brainstorm, with ... progress made on clinical, regulatory and operational fronts," ...
(Date:3/29/2017)... ... 29, 2017 , ... On the heels of the globally recognized Rare ... has announced that it will manage travel services for its 500th clinical trial this ... United States and Europe to offer travel management services specifically for clinical trials and ...
Breaking Biology Technology: