Archive for May, 2013



NOAA scientist discusses climate change in Charleston

Dr. Richard Feely will speak at the Oregon Institute of Marine Biology about his research on the effects of increased CO2 on ocean processes and ecosystems.

The lecture begins at 7 p.m. May 31 at OIMB, 63466 Boat Basin Road, Charleston. Feely will present a talk entitled, “Ocean Acidification, a clear and present danger for ocean ecosystems”.

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Oyster shells are an antacid to the oceans

How does the Chesapeake Bay spell relief? O-Y-S-T-E-R-S, a new study finds.

Like ocean waters around the world, the Chesapeake has become more and more acidic as a result of rising levels of carbon dioxide in the atmosphere. Now, by studying oyster populations in relation to acidity levels, a team of researchers has concluded that oysters — particularly their shells — can play a significant role in reducing that acidity.

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Project Assistant, IAEA project “Ocean Acidification International Coordination Centre (OA-ICC)”

The International Atomic Energy Agency (IAEA) seeks to employ a Project Assistant for the project “Ocean Acidification International Coordination Centre (OA-ICC)”. Deadline for applications: 17 June 2013.

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Celebrate World Oceans Day with your family

RYE — On Saturday, June 8, from 9:30 a.m. to noon., the Seacoast Science Center (SSC) and the Northeastern Regional Association of Coastal Ocean Observing Systems (NERACOOS) will host a family-friendly World Oceans Day celebration.

The event will kick off with a short film on ocean acidification featuring third generation ocean explorer Fabien Cousteau. Following the film, adults will join national and regional experts for a series of short presentations about ocean acidification.

Fun, hands-on activities that teach about the importance of a healthy ocean are planned for children (ages 5 and up) while their parents are viewing the film and engaged in the presentations.

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Direct and indirect effects of ocean acidification and warming on a marine plant–herbivore interaction

The impacts of climatic change on organisms depend on the interaction of multiple stressors and how these may affect the interactions among species. Consumer–prey relationships may be altered by changes to the abundance of either species, or by changes to the per capita interaction strength among species. To examine the effects of multiple stressors on a species interaction, we test the direct, interactive effects of ocean warming and lowered pH on an abundant marine herbivore (the amphipod Peramphithoe parmerong), and whether this herbivore is affected indirectly by these stressors altering the palatability of its algal food (Sargassum linearifolium). Both increased temperature and lowered pH independently reduced amphipod survival and growth, with the impacts of temperature outweighing those associated with reduced pH. Amphipods were further affected indirectly by changes to the palatability of their food source. The temperature and pH conditions in which algae were grown interacted to affect algal palatability, with acidified conditions only affecting feeding rates when algae were also grown at elevated temperatures. Feeding rates were largely unaffected by the conditions faced by the herbivore while feeding. These results indicate that, in addition to the direct effects on herbivore abundance, climatic stressors will affect the strength of plant–herbivore interactions by changes to the susceptibility of plant tissues to herbivory.

Continue reading ‘Direct and indirect effects of ocean acidification and warming on a marine plant–herbivore interaction’

NOAA ocean acidification June teacher workshops in South Florida (stipends provided)

NOAA Coral Reef Conservation Program cordially invites teachers in the south Florida area to attend a one-day workshop on ocean acidification, introducing our new OA Data-in-the-Classroom NODE module. Teachers will learn to use real data from NOAA to teach ocean acidification and how it affects coral reefs and other marine calcifiers, using integrated scalable lesson plans associated with this module. Workshop will include demos and multimedia to use in your classroom, a background science presentation on ocean acidification, and a walk-through of the five scalable lesson plans and data exercises that are part of this Data-in-the-Classroom project. Teachers will receive $75 stipend for workshop participation and $25 stipend after follow up survey. Teachers will also receive additional educational materials on coral reefs and ocean acidification, including posters, OA teachers guide, and multimedia DVDs. Limited seating: Participants will receive confirmation email once their registration is processed.

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NODC ocean acidification scientific data stewardship – data and metadata submission and documentation guidelines

The NODC Ocean Acidification Scientific Data Stewardship (OADS) team has developed ocean acidification (OA) data and metadata submission guidelines and documentation designed for optimized data discovery, transparent access, data sharing, long-term archival and scientific management of NOAA Ocean Acidification Program (OAP) funded data projects. This document addresses OA data from ships of opportunity, autonomous sensor data (e.g., moorings), gliders, research ships (e.g., discrete water samples from Niskins, CTD data, underway), laboratory and field experiments, and models. All of the NODC archived data are available via our geoportal and other interoperable NODC data services. In addition, our OADS Team is working toward developing a dedicated online OA data selection tool with enhanced search capabilities based on our rich OA metadata using ISO 19115-2.

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Moms Clean Air Force: Armed with the facts – ocean acidification

WHAT DOES IT MEAN?

The ocean is awe-inspiring. We were born of it, and it gives us life by producing much of the oxygen we breathe and the water we drink.

It is mysterious and vast. No wonder we speak of emptying oceans with teaspoons to describe impossible tasks.

Yet, unfathomably, we have accomplished the impossible. We have changed the basic chemistry of the oceans — drop by drop — in such a profound way that we may be destroying a web of life that we depend upon for our very existence. Those ocean creatures should be wary of us — not the other way around.

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Interactive effects of elevated temperature and CO2 levels on energy metabolism and biomineralization of marine bivalves Crassostrea virginica and Mercenaria mercenaria

The continuing increase of carbon dioxide (CO2) levels in the atmosphere leads to increases in global temperatures and partial pressure of CO2 (PCO2) in surface waters, causing ocean acidification. These changes are especially pronounced in shallow coastal and estuarine waters and are expected to significantly affect marine calcifiers including bivalves that are ecosystem engineers in estuarine and coastal communities. To elucidate potential effects of higher temperatures and PCO2 on physiology and biomineralization of marine bivalves, we exposed two bivalve species, the eastern oysters Crassostrea virginica and the hard clams Mercenaria mercenaria to different combinations of PCO2 (~ 400 and 800 μatm) and temperatures (22 and 27 °C) for 15 weeks. Survival, bioenergetic traits (tissue levels of lipids, glycogen, glucose and high energy phosphates) and biomineralization parameters (mechanical properties of the shells and activity of carbonic anhydrase, CA) were determined in clams and oysters under different temperature and PCO2 regimes. Our analysis showed major inter-species differences in shell mechanical traits and bioenergetics parameters. Elevated temperature led to the depletion of tissue energy reserves indicating energy deficiency in both species and resulted in higher mortality in oysters. Interestingly, while elevated PCO2 had a small effect on the physiology and metabolism of both species, it improved survival in oysters. At the same time, a combination of high temperature and elevated PCO2 lead to a significant decrease in shell hardness in both species, suggesting major changes in their biomineralization processes. Overall, these studies show that global climate change and ocean acidification might have complex interactive effects on physiology, metabolism and biomineralization in coastal and estuarine marine bivalves.

Continue reading ‘Interactive effects of elevated temperature and CO2 levels on energy metabolism and biomineralization of marine bivalves Crassostrea virginica and Mercenaria mercenaria’

Paul G. Allen Ocean Challenge – updated notice

Two informational webinars have been held to date regarding the Paul G. Allen Ocean Challenge: Mitigating Acidification Impacts. Webinar recordings and registration information, answers to frequently asked questions, and submission guidelines are all available here.

To aid planning efforts for submission evaluation for this Ocean Challenge as well as planning for future projects, responses to a three-question survey are requested from the community.  Please take a moment to provide feedback by June 5, 2013 here.

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OA-ICC HIGHLIGHTS

Ocean acidification in the IPCC AR5 WG II

OUP book