Archive for the 'Uncategorized' Category

OA-ICC bibliographic database updated

Published 1 July 2025 Uncategorized Closed

An updated version of the OA-ICC bibliographic database is available online.

The database currently contains 9392 references and includes citations, abstracts and assigned keywords. Updates are made every month.

The database is available as a group on Zotero. Subscribe online or, for a better user experience, download the Zotero desktop application and sync with the group OA-ICC in Zotero. Please see the “User instructions” for further details.

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Species-specific proton and oxygen flux in Hawaiian corals under ocean acidification—a microsensor analysis of the concentration boundary layer

Published 30 May 2025 Uncategorized Closed
Tags: , , , ,

Coral reefs are essential for the foundation of marine ecosystems. However, ocean acidification (OA) driven by rising atmospheric carbon dioxide (CO₂) threatens coral growth and biological homeostasis. In this study, we examined the microenvironmental fluxes of two Hawaiian coral species—Montipora capitata and Pocillopora acuta to elevated pCO₂, focusing on proton (H⁺) and oxygen (O₂) flux within the concentration boundary layer (CBL) at the zone of primary calcification (ZPC). Utilizing pH and O2 microsensors under controlled light and dark conditions, we characterized species-specific CBL traits and quantified material fluxes. Our results revealed that while both species maintained a positive net proton flux, P. acuta showed a pronounced reduction in dark proton efflux (-188%) and a significant increase in light O₂ flux (+ 175%), suggesting impaired metabolic and calcification dynamics. In contrast, M. capitata showed minimal changes in both flux parameters under similar OA conditions. Statistical analyses using linear models showed several significant interactions between species, treatment, and light conditions, identifying physical, chemical, and biological drivers for species responses to OA. We also present a conceptual model correlating external measures with internal physiologies to explain our findings. We indicate that OA exacerbates microchemical gradients in the CBL and potentially acts to reduce calcification in vulnerable species like P. acuta while highlighting the resistance of M. capitata. This study advances our understanding of how species-specific microenvironmental processes could influence coral responses to changing ocean chemistry.

Continue reading ‘Species-specific proton and oxygen flux in Hawaiian corals under ocean acidification—a microsensor analysis of the concentration boundary layer’

Share if you are attending UNOC or the One Ocean Science Congress

Published 19 May 2025 Uncategorized Closed

Both the One Ocean Science Congress and the third United Nations Oceans Conference (UNOC) are taking place in Nice, France in June 2025. To know who from the ocean acidification community is attending, the Global Ocean Acidification Observing Network (GOA-ON) has created a survey. Please fill out the survey if you are attending either of the events in Nice and share with ocean acidification colleagues who are coming as well.

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Sensitivity of pteropod calcification to multi stressor variability in coastal habitats

Published 18 December 2024 Science , Uncategorized Closed
Tags: , , , , , , , , ,

Highlights

  • Pteropod calcification under coastal multiple stressors was investigated.
  • Shell morphometrics and high-resolution model outputs was combined.
  • Saturation state, temperature and food are drivers of calcification.
  • Different calcification modes are dependent on the type of environment.
  • Stable vs dynamic conditions induce different calcification strategy.

Abstract

Comprehensive understanding of environmental multiple stressors on calcification in marine calcifiers remains an important topic of study, especially under ocean global change associated with multiple stressors. We explore the impact of multiple stressor variability on pteropod calcification in the southern Salish Sea (Washington, U.S.), a coastal estuarine system that exhibits a high degree of spatial and temporal variability in multiple environmental parameters across sampling locations. We hypothesized that such variability is associated with differences in pteropod calcification. Shell thickness and shell density across pteropod life history stages was compared with high-resolution outputs from a realistic model of regional circulation and biogeochemistry to explore how the mean and variability of multiple stressors (aragonite saturation state (Ωar), temperature, food availability) influence calcification. We found that both the mean and variability in multiple stressors play a major role in calcification in pteropods, with a generalized linear model explaining more than 60% of the variance in calcification. We suggest two different modes of shell building: stable conditions of lower mean Ωar trigger the loss of shell thickness and density. In the more variable habitats, i.e., where the variability occurs over diel and seasonal scales, shell thickness increases at higher Ωar variability and greater food availability, which might partially compensate for the loss of shell density. This plastic response appears to be consistent across life stages and could represent a response mechanism that allows some compensatory calcification under less favourable conditions. However, compensation is very limited, as evident by lower shell growth resulting in lower shell sizes comparable to early life stages. These results substantially improve the understanding of the variability in multiple stressors on the calcification process under multiple stressors and provide a foundation for the development of two new proxies for calcification monitoring, and with implications for marine carbon dioxide removal strategies.

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Career opportunity: Supervisory Physical Scientist, Ocean Acidification Program (OAP), NOAA, USA

Published 7 February 2024 Jobs , Uncategorized Closed

Note: Open to the public Career transition (CTAP, ICTAP, RPL), U.S. Citizens, Nationals or those who owe allegiance to the U.S.

Duties

As a Supervisory Physical Scientist, you will perform the following duties:

  • Directs the National Oceanic and Atmospheric Administration (NOAA) Ocean Acidification (OA) program; develops and facilitates strategies; coordinates and implements ocean acidification research and management activities across NOAA. Reports to Congress on all matters related to the FOARAM Act. Authors and coordinates scientific and technical papers. Builds and leads international collaborative efforts to expand global understanding of ocean acidification.
  • Assesses and updates OA program objectives and goals in light of new research findings and establishes research implementation work plans to accomplish objectives and goals. Reviews and revises priorities of the Federal and NOAA OA strategic plans and NOAA research plans and executes programs to achieve these priorities.
  • Conducts analyses of the OA program and procedures, as well as procedures within Oceanic and Atmospheric Research (OAR) and NOAA that impact the OA program such as budget, workforce, and hiring. Identifies problems and makes recommendations for improvement. Oversees the management of the OA program budget of NOAA investments in ocean acidification research and monitoring.
  • Provides the full range of supervisory functions to include overseeing and assigning work to be accomplished; setting and adjusting short and long term priorities; finding ways to improve productivity and increase quality; providing counseling, technical oversight, instruction, and professional development of staff. Oversees the performance management and performance appraisal of staff. Furthers the diversity of the workforce to incorporate a broad representation of qualified staff, and relevant approaches and ideas. Ensures a positive and supportive work climate.
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Synergizing climate change and ocean regimes: a comprehensive international legal approach for ocean acidification governance

Published 22 January 2024 Uncategorized Closed
Tags:

Ocean acidification poses a myriad of challenges, particularly to marine environments and ecosystems. Its negative repercussions are equally obvious from a human-centric perspective. Despite efforts to address ocean acidification through various international legal frameworks, current international legal frameworks, such as the United Nations Convention on the Law of the Sea and the United Nations Convention on Climate Change, which represent the climate change regime and the ocean regime , respectively, fall short of adequately addressing ocean acidification challenges. Because of the climate change regime’s atmospheric -centered perspective and the ocean regime’s pollution-oriented perspective, ocean acidification falls between the cracks and is not a priority for either regime. To adequately address the issues posed by ocean acidification, a concerted effort between the the legal regime addressing climate change and the legal regime regulating maritime affairs is crucial. This effort might be realized by developing a robust governance system that encompasses both of these regimes, which are specifically tailored to tackle ocean acidification. Given the complexity of ocean acidification governance, the distribution of roles for both regimes should be thoroughly examined. Due to its broad reach, the ocean regime might take the lead in directing the trajectory of ocean acidification, while the climate change regime might provide assistance within the context of ocean acidification governance. Active mutual reference and due diligence obligations could be employed in this scenario to bridge the gaps created by both the climate change regime and the ocean regime regarding ocean acidification. The active interaction between these regimes might pave the way for proper ocean acidification governance in order to meet the challenges posed by ocean acidification.

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Season’s Greetings!

Published 29 December 2023 Uncategorized Closed

Job opportunity: Ocean Acidification Program Technician, Mote Marine Laboratory

Published 13 December 2023 Uncategorized Closed

Deadline for applications: 22 December 2023

Location: Summerland Key, FL, USA

The Ocean Acidification (OA) Program at the Mote Marine Laboratory Elizabeth Moore International Center for Coral Reef Research and Restoration (IC2R3) located on Summerland Key, FL seeks a technician position to be filled as soon as possible. This position will report directly to the OA Program Lab Manager within the OA Program. General duties to be performed include analyses of dissolved inorganic carbon (DIC), total alkalinity, spectrophotometric pH, and colorimetry; participation in field sampling; operations from trucks or boats; occasional evening/night shifts, depending on project demands; and assisting IC2R3 with lab tours and other outreach events (as needed). Activities in this program are carried out according to the Mote Marine Lab Quality Plan including operation and maintenance of scientific equipment, preparations for field trips, sample analyses, and data quality assessments. The majority of this position will be chemistry lab-based and will require work with hazardous substances, laboratory cleaning, instrument maintenance, experimental work, and data collection. Some projects will require time on a research vessel offshore but will be limited.

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Nuclear explained – what is ocean acidification? (text & audio)

Published 13 June 2023 Presentations , Program , Uncategorized Closed

The ocean is both a source of oxygen and a sink for carbon dioxide (CO2). It absorbs about one fourth of all CO2 emissions. While this leaves less CO2 in the atmosphere and mitigates climate change, it makes the ocean more acidic. Ocean acidification has emerged as a global issue because of its effect on marine organisms, ecosystems and livelihoods.

Guests:

  • Sam Dupont, Professor of Marine Eco-Physiology at the University of Gothenburg, Sweden
  • Sarah Flickinger, Associate Research Scientist at the Ocean Acidification International Coordination Center, IAEA Marine Environment Laboratories, Monaco
  • Celeste Sánchez Noguera, Researcher and Lecturer at the University of Costa Rica

In this episode, experts explain what ocean acidification is and how nuclear techniques contribute to the understanding of this process and its impact. Nuclear techniques enable scientists to study past ocean conditions and forecast future effects of more acidic conditions.

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New email subscription service for OA-ICC News Stream

Published 10 November 2022 Uncategorized Closed

We are pleased to announce the OA-ICC News Stream has a new way to stay up to date with the latest ocean acidification literature, news, and more.

To receive a daily or weekly digest email of all new News Stream posts, simply enter your email in the subscription box as indicated to the left. You can then choose the frequency of your email updates when you confirm your email address (Immediate, Daily, Weekly). To avoid a large number of daily emails, we highly recommend choosing “Daily” or “Weekly” emails.

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OA-ICC news stream email subscription disruption

Published 2 November 2022 Uncategorized Closed

The provider for the OA-ICC news stream email subscription service is no longer in existence and daily emails are no longer being sent to our subscribers. Kindly follow the OA-ICC news stream here at news-oceanacidification-icc.org or on the OA-ICC Twitter feed while we work to rectify this issue. We will continue our usual daily posts of ocean acidification literature, general articles, jobs, events, and more. We hope to resume our daily emails to our subscribers shortly!

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Environmental stability and phenotypic plasticity benefit the cold-water coral Desmophyllum dianthus in an acidified fjord

Published 21 July 2022 Uncategorized Closed
Tags: , , , , , , ,

The stratified Chilean Comau Fjord sustains a dense population of the cold-water coral (CWC) Desmophyllum dianthus in aragonite supersaturated shallow and aragonite undersaturated deep water. This provides a rare opportunity to evaluate CWC fitness trade-offs in response to physico-chemical drivers and their variability. Here, we combined year-long reciprocal transplantation experiments along natural oceanographic gradients with an in situ assessment of CWC fitness. Following transplantation, corals acclimated fast to the novel environment with no discernible difference between native and novel (i.e. cross-transplanted) corals, demonstrating high phenotypic plasticity. Surprisingly, corals exposed to lowest aragonite saturation (Ωarag < 1) and temperature (T < 12.0 °C), but stable environmental conditions, at the deep station grew fastest and expressed the fittest phenotype. We found an inverse relationship between CWC fitness and environmental variability and propose to consider the high frequency fluctuations of abiotic and biotic factors to better predict the future of CWCs in a changing ocean.

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Happy New Year!

Published 1 January 2022 Uncategorized Closed
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Ocean acidification news stream gets new features

Published 26 August 2021 Uncategorized Closed

Dear Users,  

The OA-ICC has supported the ocean acidification community by maintaining the ocean acidification news stream and OA-ICC bibliographic database for nearly 10 years. This year in light of the increased importance of the virtual space in the time of COVID-19, we dedicated additional resources to update and grow our site, enhancing the tools available to our community. In addition to updating the Bibliographic Database, which now contains more than 8,800 scientific papers on ocean acidification, we have developed new guides and features on the site which you may be interested in.

These include: 

  • A calendar with descriptions and links to events on OA, which you may sync with your google calendar. This calendar is updated regularly, and we welcome submissions of events.
  • A resource library, which contains a vast selection of topics on OA, for example: educational materials, projects and programs, general articles, reports and newsletters, and organizations. More resources and categories will be added continuously and we welcome resource submissions.
  • An enhanced basic search and new advanced search option, which will help you explore our archives and resource library.
  • A summary of our methods for maintaining this news stream, as well as detailed documentation of our procedures. 
  • A page providing quick links and information about our bibliographic database and data portal.   

We invite you to explore the site and benefit from the additional resources made available to the ocean acidification community. If you are interested in collaborating with the OA-ICC projects, programs and events, please contact us at oa-icc@iaea.org. 

Kind regards,  

OA-ICC team 

OA-ICC bibliographic database updates and user guide

Published 26 August 2021 Uncategorized 1 Comment

We are happy to inform you that the latest version of the OA-ICC bibliographic database, now containing more than 8,800 scientific articles, books and more on ocean acidification, is available for public use on Zotero and for download on pCloud. The database is no longer available on Mendeley because the public groups feature has been discontinued, but you may still download the database and add it to your Mendeley library.

We have also created a new user guide and a page on our methodology to improve your experience using the bibliographic resources. You may find our user guide and more information on OA-ICC bibliographic resources, including the biological response data portal, on our new bibliographic database page. This page includes our updated friendly user’s guide, featuring explanations to our custom keywords with links to clear examples. In addition, we will be sharing a tutorial on navigating the bibliographic resources soon.

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CO2-in-seawater reference materials community survey

Published 22 April 2021 Uncategorized Closed

Dear GOA-ON member,

The U.S. Interagency Working Group on Ocean Acidification is engaging in efforts to increase the resilience of the production and distribution of reference materials for the quality control of measurements of seawater CO2 system parameters. Currently, there is a single source of reference materials for total alkalinity, dissolved inorganic carbon, and pH in seawater and a calibrated HCl titrant for seawater alkalinity analysis (A. Dickson Laboratory, Scripps Institution of Oceanography, UC San Diego).

We are reaching out today to encourage your participation in a community survey about your use of CO2-in-seawater reference materials. Use this link to access the survey: 

https://docs.google.com/forms/d/e/1FAIpQLSdNiIIARiKAxSyorp_IWYY5vOeLi7bMNRAmSx68XvyGmcCCLw/viewform?usp=sf_link

This survey is part of a larger effort, the first being a webinar by Andrew Dickson entitled, “CO2-in-seawater reference materials: yesterday, today, and tomorrow”. You can view a recording of that webinar here, with questions, conversation, and a pdf of the slides available here.

Data from this survey will be used to gain a baseline understanding of how reference materials for the quality control of measurements of seawater CO2 system parameters are used and how to build resilience in their production and distribution. Individual responses to this survey are confidential. Data from this survey linked to respondents’ identities will never be released publicly. Rather, data for public release will be presented in aggregated forms. 

This survey will take 5-10 minutes to fill-out. While the survey will not close on a specific date, we request that you complete it by May 21, 2021. 

Sincerely,
Michael Acquafredda, United States National Oceanic & Atmospheric Administration (NOAA)

Shallin Busch, NOAA

Libby Jewett, NOAA

Andrew Dickson, Scripps Institution of Oceanography, UC San Diego

Hedy Edmonds, United States National Science Foundation

Privacy statement:
Individual responses to this survey are confidential. Data from this survey linked to respondents’ identities will never be released publicly. Rather, data for public release will be presented in aggregated forms.

Timeline:
While the survey will not close on a specific date, we request that you complete it by May 21, 2021.

Rationale:
Reference materials are fundamental for accurate and precise measurements of seawater CO2 system parameters and research related to ocean acidification and oceanic carbon cycles. Currently, there is a single source of reference materials for total alkalinity, dissolved inorganic carbon, and pH in seawater and a calibrated HCl titrant for seawater alkalinity analysis (A. Dickson Laboratory, Scripps Institution of Oceanography, UC San Diego). The U.S. Interagency Working Group on Ocean Acidification is engaging in efforts to increase the resilience of the production and distribution of reference materials for the quality control of measurements of seawater CO2 system parameters. This survey is the second community engagement in this larger effort, the first being a webinar by Andrew Dickson entitled, “CO2-in-seawater reference materials: yesterday, today, and tomorrow” which can be viewed using Link #1 (below). A pdf of the slides and a conversation thread resulting from the webinar are available by accessing Link #2 (below).

Link #1 – “CO2-in-seawater reference materials: yesterday, today, and tomorrow” https://www.youtube.com/watch?v=eajzkNxei6w

Link #2 – Questions, conversations, and a pdf of the Dr. Dickson’s webinar slides
https://www.oainfoexchange.org/members/updates/50051

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One million!

Published 30 June 2017 Uncategorized Closed

The Ocean Acidification News Stream just passed the 1,000,000 hits mark!

We thank all readers for their interest.

OA-ICC December calendar: 12/12- “To read this weekend: OA page-turners”

Published 12 December 2014 Uncategorized Closed

Count down the days until 2015 together with the OA-ICC! Each day of December you will find a short story on the OA-ICC news stream highlighting an ocean acidification project, effort, or resource.

Discover today’s story below: “To read this weekend: OA page-turners”

Continue reading ‘OA-ICC December calendar: 12/12- “To read this weekend: OA page-turners”’

Ocean acidification blog: 2012 in review

Published 1 January 2013 Uncategorized Closed

Dear Blog Addicts,

Lina Hansson and I wish all the best for 2013 to all readers of the EPOCA blog! We thank you all for your interest. Even though EPOCA came to an end in June 2012, we have been able to maintain this blog, partly thanks to support from the International Atomic Energy Agency (IAEA). The blog will soon be transferred to the Ocean Acidification International Coordination Centre and operated from IAEA. We hope that the transition will be smooth; stay tuned for more information.

Here are a few numbers:

  • 4584 posts have been published since 2006 (about 1198 in 2012)
  • 653 subscribers through RSS or email (up from 570 in 2011)
  • 376 Twitter followers (up from 270 in 2011)
  • an unknown number of FaceBook friends

The WordPress.com stats helper monkeys prepared a 2012 annual report for this blog: click here to see the complete report.

I remind you below the content of the “About” page and, also, that comments are always welcome. Just type your comment in the box located below each article. Note that comments are moderated.

Jean-Pierre Gattuso
EPOCA Scientific Coordinator (until June 2012)

———————————————
Jean-Pierre Gattuso | http://www.obs-vlfr.fr/~gattuso

This blog was started in July 2006 as a “one man” effort. It is a product of EPOCA, the European Project on Ocean Acidification since May 2008 and it is sponsored by the IMBER and SOLAS projects since January 2010. Its only ambition is to centralize information available on ocean acidification and its consequences on marine organisms and ecosystems. By no means it is meant to be comprehensive but we are trying to provide an unbiased view of the literature and media articles. The owner of this blog, the European Commission and the sponsoring organizations do not endorse the information published.

This blog is coordinated by:

Jean-Pierre Gattuso, CNRS Senior Research Scientist
CNRS-Université Pierre et Marie Curie Paris 6, France
Email: gattuso at obs-vlfr.fr
Web site

Contributors are:

  • Jean-Pierre Gattuso, EPOCA coordinator (gattuso at obs-vlfr.fr)
  • Lina Hansson, EPOCA Project Manager (hansson at obs-vlfr.fr)
  • Anne-Marin Nisumaa (Until May 2012), EPOCA Information Technology Manager (nisumaa at obs-vlfr.fr)

Ocean Acidification Presentation and Roundtable Discussion – Jan. 9, 2012

Published 24 December 2011 Uncategorized Closed

Acclaimed University of Alaska Fairbanks researcher Jeremy Mathis will be in Dillingham on January 9th, 2012.  He will be presenting his research findings on ocean acidification and moderators will lead a discussion with the community on what the changing oceans mean for a fishing community such as Dillingham.

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