Ocean dead zones – regions with levels of oxygen too low to sustain marine life - have grown to become a common feature of coastal regions around the world. A new study published in the January 8 issue of PLOS One by Christopher Gobler, Professor in the School of Marine & Atmospheric Sciences at Stony Brook University and colleagues, has found that low pH levels within these regions represent an additional, previously unappreciated, threat to ocean animals.
One of the organisms used in the study, bay scallops.
For decades, marine biologists have investigated the effects of low oxygen on marine life without considering pH levels. In reality, low oxygen waters are also acidified waters, but studies investigating how these two conditions affect marine life together have been lacking.
In a series of experiments on young bay scallops and hard clams, marine organisms of significant economic and ecological value, the investigators found that the combined effects of low oxygen and low pH led to higher rates of death and slower growth than by either individual factor. Further, in some cases there was negative synergy between these environmental factors, which means that the performance of the animals was worse than predicted by either individual factor.
The paper, Hypoxia and acidification have additive and synergistic negative effects on the growth, survival, and metamorphosis of early life stage bivalves, written by Gobler, SoMAS Prof. Hannes Baumann, and Stony Brook graduate students, Elizabeth Depasquale and Andrew Griffith, has important implications for climate change as well.
“Low oxygen zones in coastal and open ocean ecosystems have expanded in recent decades, a trend that will accelerate with climatic warming,” said Gobler. “There is growing recognition that low oxygen regions of the ocean are also acidified, a condition that will intensify with rising levels of atmospheric CO2 due to the burning of fossil fuels causing ocean acidification. Hence, the low oxygen, low pH conditions used in this study will be increasingly common in the World’s Oceans in the future.”
Dr. Mark Green, a professor at Saint Joseph’s College of Maine and an expert on the effects of ocean acidification on shellfish praised the study.
“The relationship between pH and oxygen is well documented in near shore locales yet, as the authors state, the combined impact of the two has remained unexplored,” said Green. “This is a great paper; it will have an impact, particularly on those scientists that have worked to understand the effect of chronic low oxygen on the physiology of marine organisms.”
Dr. Baumann believes this study may alter how future research into Dead Zones may be conducted.
“We suggest that recently discovered low pH sensitivities in many finfish and shellfish larvae, and the compounded effects of low pH and low oxygen in shellfish relative to each individual parameter should prompt a re-alignment of future studies,” said Baumann. “A comprehensive evaluation of the combined effects of low oxygen and acidification on marine life will be critical for understanding how ocean ecosystems respond to these conditions both today and under future climate change scenarios.”About the School of Marine and Atmospheric Sciences at Stony Brook University
Citation: Gobler CJ, Depasquale EL, Griffith AW, Baumann H. 2013. Hypoxia and acidification have additive and synergistic negative effects on the growth, survival, and metamorphosis of early life stage bivalves. PLoS ONE 9(1): e83648. doi:10.1371/journal.pone.0083648
Christopher Gobler | Newswise
Malaysia's unique freshwater mussels in danger
27.09.2016 | The University of Nottingham Malaysia Campus
How to detect water contamination in situ?
22.09.2016 | Tomsk Polytechnic University (TPU)
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of light metals.
Scientists at the University of Stuttgart have now developed two new process variants that will considerably expand the areas of application for friction stir welding.
Technologie-Lizenz-Büro (TLB) GmbH supports the University of Stuttgart in patenting and marketing its innovations.
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of...
Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.
Optical quantum computers are what people are pinning their hopes on for tomorrow’s computer technology – whether for tap-proof data encryption, ultrafast...
The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.
“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...
With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.
Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...
For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.
Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...
28.09.2016 | Event News
27.09.2016 | Event News
23.09.2016 | Event News
28.09.2016 | Earth Sciences
28.09.2016 | Power and Electrical Engineering
28.09.2016 | Event News