The  Mid-Atlantic Coastal Acidification Network&#8217;s (MACAN) annual webinar series launches January 26! Join us to learn about the latest research on flounder, forage fish, and acidification in coastal waters from Chris Chambers, a research fishery biologist at NOAA.
In February, we&#8217;ll explore the impacts of ocean acidification and other climate change impacts on shipwrecks, shell middens, and cultural resources with Susan Langley, Maryland&#8217;s State Underwater Archaeologist. March and April webinar topics will be available soon. 
<figure id="attachment_5703" aria-describedby="caption-attachment-5703" style="width: 603px" class="wp-caption aligncenter"><img loading="lazy" decoding="async" class="wp-image-5703 size-full" src="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/rsw_1280-6.webp" alt="" width="603" height="452" srcset="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/rsw_1280-6.webp 603w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/rsw_1280-6-300x225.webp 300w" sizes="auto, (max-width: 603px) 100vw, 603px" /><figcaption id="caption-attachment-5703" class="wp-caption-text">A 150-year-old locomotive wreck off the New Jersey coast (photo by Monmouth University)</figcaption></figure>

January 26 at 11 a.m.
Please register at: 
<a class="x-el x-el-a c2-9 c2-a c2-53 c2-c c2-d c2-54 c2-f c2-55 c2-3 c2-3j c2-n c2-10 c2-p" href="https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fattendee.gotowebinar.com%2fregister%2f4753238655917450512&amp;c=E,1,N2wAZyAC-fSOcEOh7_rTJWbsjH_Ec5miZM90kuxirDrv28sHpdoQEHhTqZIoOvYfeIk3YfV9iUq2OI8UVYhLgCD-mTzzkMWLtILp-VKaL-xqNEwX4w,,&amp;typo=1" target="_blank" rel="noopener noreferrer">https://attendee.gotowebinar.com/register/4753238655917450512</a> 
Abstract: Many ecologically important features of marine fishes are plastic in response to changing environments. Variation in features or traits of the earliest life-stage of fishes could be critical to survival and recruitment, and may be predictable from environmental conditions experienced by these young fish. In an experimental context, a first step in revealing the degree and shape of responses to environmental drivers is to move from a simple demonstration of an effect to a more  insightful analysis of the scope and shape of the biological response to these environmental drivers. We describe experimental protocols for  examining responses of early life-stages of marine fishes to a large number of different levels of environmental factors (e.g., thermal  regimes, CO2 levels, dissolved oxygen). We provide examples of this  approach in the context of ocean acidification and use several  Mid-Atlantic flatfishes and forage fish species that occupy contrasting habitats during early life. Summer flounder, Paralichthys dentatus, spawns in shelf waters in autumn and experiences relatively stable water chemistry yet cooling thermal regimes. Winter flounder, Pseudopleuronectes americanus, spawns in estuaries in mid winter and experiences cold but warming regimes with variable CO2 levels. In contrast, Atlantic silverside, Menidia menidia,  spawns in estuaries in late spring and summer, and experiences warm yet variable temperatures and highly variable water chemistry. The scope  and possible ecological consequences of responses to these conditions are described. Importantly, it is only with a high-treatment frequency approach that the functional forms of these responses can be revealed.

Examining the Biological Responses of Ocean Acidification in Early Life-Stages of Fishes of Inshore Waters of the Mid-Atlantic, USA.

February 25 at 1 p.m. 
Please register at: 
<a class="x-el x-el-a c2-9 c2-a c2-53 c2-c c2-d c2-54 c2-f c2-55 c2-3 c2-3j c2-n c2-10 c2-p" href="https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fattendee.gotowebinar.com%2fregister%2f6145951551914346000&amp;c=E,1,QXecKdXRs_bs7NdHyy_ZqyxtTKUJCGXhfQOU1f4jF5augl777BczQeI1i5360DSreaIRFQPJcUVHfpMek3PJnXKL2VCCHnlghF9Em5NikOcxCJ5LV7fMSw,,&amp;typo=1" target="_blank" rel="noopener noreferrer">https://attendee.gotowebinar.com/register/6145951551914346000</a>
Abstract: Although our maritime heritage is young compared to the Vikings&#8217;, our country has thousands of cultural resources such as shipwrecks, shell middens, and sunken vessels from WWII, that lie under or adjacent to the  Mid-Atlantic&#8217;s coastal waters. This presentation examines how different aspects of climate change, including ocean acidification, impact our heritage resources. It defines the diverse cultural materials affected, and considers the potential and resulting effects on archaeological research, the environment, and the economy. In addition, means of  addressing these effects, both active and proposed are discussed. One example involves a survey of archaeologists associated with government agencies, academic institutions, and non-profit organizations who all  placed ocean acidification in the top three most damaging climate change threats they face in their work. This has led to increased networking at a global level as we enter the U.N. Decade of Ocean Science for Sustainable Development.

Climate Change Impacts to Cultural and Heritage Resources

Webinars to Explore Acidification Impacts on Fish, Shipwrecks

Join us on April 12 at 1 p.m. for &#8216;U.S. State-Led OA Action Planning in the Mid-Atlantic.&#8217; 
<a class="x-el x-el-a c2-9 c2-a c2-53 c2-c c2-d c2-54 c2-f c2-55 c2-3 c2-3j c2-n c2-10 c2-p" href="https://register.gotowebinar.com/register/5804464133441407245" target="_blank" rel="noopener noreferrer">Click here</a> to register for this free discussion.   
<img loading="lazy" decoding="async" class="aligncenter wp-image-5690 size-full" src="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/rsw_540-16.webp" alt="" width="540" height="712" srcset="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/rsw_540-16.webp 540w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/rsw_540-16-228x300.webp 228w" sizes="auto, (max-width: 540px) 100vw, 540px" />

U.S. State-Led OA Action Planning in the Mid-Atlantic

Monday, September 11, 1:00-5:00 PM
Session 1: Assessing Vulnerability in Mid-Atlantic Species, Ecosystems, and Industries
This session will focus on the biological impacts and socioeconomic vulnerability of species, habitats, and the shellfish industry in the Mid-Atlantic. Lessons learned from interviews with growers and fishermen about their adaptation capacity will also be highlighted.
Session 2: New Initiatives in Outreach and Community Engagement
This session will focus on the latest outreach initiatives and available resources from the East Coast CAN’s (coastal acidification networks) and their partners (OAP, The OA Alliance, and the Aquarium Conservation Partnership).
Session 3: Updates on Federal and State OA Initiatives and DEIJA Considerations
This session will provide an overview of national, federal, and state initiatives in monitoring and mitigating COA. There will be an extended time for discussion at the end of this session.
<iframe loading="lazy" title="2023 MACAN Workshop Day 1" width="500" height="281" src="https://www.youtube.com/embed/mgcXqVv6cYo?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
Tuesday, September 12 9:00-2:30 PM
Session 1: Monitoring, Technology, and Data to Inform Management Decisions
This session will highlight some of the latest research, monitoring, and data tools being developed for community scientists, resource managers, and the aquaculture industry.
Session 2: mCDR and Panel Discussion
mCDR is a key component of the national Ocean Climate Action Plan (OCAP). This session will focus on newly funded NOAA projects, governance considerations, and how industry is advancing mCDR monitoring, reporting, and verification methods.
Session 3: Nature-Based Solutions for healthy ecosystems and mCDR:
This session will discuss approaches to mCDR and maintaining healthy ecosystems through restoration or enhancement of shellfish, SAV, and ecologically important habitats.

A dynamic pathway to transition from vulnerable to resilient fisheries social ecological systems: A transdisciplinary case study of the U.S. Atlantic sea scallop fishery

Linking Biological and Chemical Observationsusing Community Science

Submerged aquatic vegetation and coastal acidification

Coastal Acidification Network Stakeholder Feedback Project

Ocean and Coastal Acidification Monitoring Plan for the Northeast

Exploring Our Changing Ocean: Impacts and Response to Ocean Acidification

MACAN DEIJA Considerations

Interagency Working Group on Ocean Acidification: Federal OA Policy and Coordination

Ocean Acidification Initiatives inNew York State

Ocean Acidification in New Jersey

Delaware Ocean and Bay Plan

Maryland Ocean Acidification Action Plan and Implementation

Mid-Atlantic Ocean & Coastal Acidification Monitoring Inventory

Measuring Protons with Photons

Orion Glass Electrode pH Validation in Estuarine Waters & Citizen Science Success

Defining and Mapping Mid-Atlantic Ocean and Coastal Acidification Hotspots

An overview of new federal investments in marine Carbon Dioxide Removal (mCDR) research

Ocean Carbon Dioxide Removal: Legal Challenges and Opportunities

MRV Development for Electrochemical Ocean Alkalinity Enhancement

Oyster reef carbonate chemistry: Implications for restoration

Indigenous Perspectives on Water Quality in the Nansemond River

Floating Wetlands: Nutrient removal and interactions with their environment

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/S.Meseck.S1S1D1.pdf" target="_blank" rel="noopener">Presentation slides are available here.</a>

Session 1 of Day 1: Assessing Vulnerability in Mid-Atlantic Species, Ecosystems, and Industries 

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/Rivest_MACAN_050222.pptx.pdf" target="_blank" rel="noopener">Presentation slides are available here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/C.Gurbisz.S1S4D1.pdf" target="_blank" rel="noopener">Presentation slides are available here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/J.Vreeland.S2S1D1.OA-STAKEHOLDER-SURVEY-PRESI_Vreeland_9-6-23.pptx.pdf" target="_blank" rel="noopener">View slides from this presentation here.</a>

Session 2 of Day 1: New Initiatives in Outreach and Community Engagement

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/E.Silva_.S1S2D1.2023_MACAN-Workshop_Baltimore.pdf" target="_blank" rel="noopener">View slides from this presentation here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/J.Turner.ACP-OA-Comms-Project_-Presentation-Template_September-2023_FINAL.pptx.pdf" target="_blank" rel="noopener">View slides from this presentation here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/MACAN-DEIJA-Considerations_NYSDOS.mp4" target="_blank" rel="noopener">Click here to view the presentation.</a>

Session 3 of Day 1: Updates on Federal and State OA Initiatives and DEIJA Considerations

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/C.Witowski.S3S2D1.MACAN-IWGOA-Presentation.pdf" target="_blank" rel="noopener">Click here to view the speaker&#8217;s slides.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/C.Personius.Ocean-Acidification-Initiatives-in-New-York-State_2023_2.pdf" target="_blank" rel="noopener">Click here to view the speaker&#8217;s slides.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/M-Rutkoski-MMR.pdf" target="_blank" rel="noopener">Click here to view the speaker&#8217;s slides.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/M.Yacano.Delaware-Ocean-and-Bay-Plan_OA-Considerations-Presentation.pdf" target="_blank" rel="noopener">Click here to view the speaker&#8217;s slides.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/R.Lamb_.S3S6D1.pdf" target="_blank" rel="noopener">Click here to view the speaker&#8217;s slides.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/C.LaRoche.S1S1D2-1.pptx.pdf" target="_blank" rel="noopener">Presentation slides are available here.</a>

Session 1 of Day 2: Monitoring, Technology, and Data to Inform Management Decisions

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/K.GrabS1S2D2MACAN-pHyter.pdf" target="_blank" rel="noopener">Presentation slides are available here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/Reimer-MACAN-Meeting.pdf" target="_blank" rel="noopener">Presentation slides are available here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/T.Schwemmer.S1S4D2.pdf" target="_blank" rel="noopener">Presentation slides are available here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/G.Kitch_.S2S1D2.20230912_MACAN_NOPP.pdf" target="_blank" rel="noopener">View slides from this presentation here.</a>

Session 2 of Day 2: mCDR and Panel Discussion 

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/R.Webb_.S2S2D2-Slides-MACAN-mCDR-Panel.pptx.pdf" target="_blank" rel="noopener">View slides from this presentation here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/M.Ringham.S2S3D2.pptx.pdf" target="_blank" rel="noopener">View slides from this presentation here.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/S.Tomasetti.S3S1D2_MACAN_2023.pptx.pdf" target="_blank" rel="noopener">Click here to view the speaker&#8217;s slides.</a>

Session 3 of Day 2: Nature-Based Solutions for healthy ecosystems and mCDR:

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/C.Bruce_.S3S2D2_NIN_MACAN_Presentation.pptx.pdf" target="_blank" rel="noopener">Click here to view the speaker&#8217;s slides.</a>

<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/I.Sanchez-Viruet.MACAN-Workshop-2023.mp4" target="_blank" rel="noopener">Click here to view the presentation.</a>

MACAN Coastal & Ocean Acidification Workshop

MACAN’s biennial state-of-the-science meeting and technical assistance workshop will be hosted in partnership with the NOAA Ocean Acidification Program (OAP) from July 15-17 at the Smithsonian Environmental Research Center, in Edgewater, Maryland.
<a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/07/MACAN_Workshop_5-28-25.pdf" target="_blank" rel="noopener">A draft agenda can be viewed here.</a>
<img loading="lazy" decoding="async" class="size-medium wp-image-5268 alignright" src="https://macancms.3lanemarketing.com/wp-content/uploads/2025/04/1752850971770-300x200.png" alt="" width="300" height="200" srcset="https://macancms.3lanemarketing.com/wp-content/uploads/2025/04/1752850971770-300x200.png 300w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/04/1752850971770-1024x682.png 1024w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/04/1752850971770-768x512.png 768w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/04/1752850971770.png 1310w" sizes="auto, (max-width: 300px) 100vw, 300px" />
Workshop goals include:
<ul class="wp-block-list">
<li>Improve/support regional collaboration on standards of practice/validation methods for various types of instruments and coastal and estuarine waters</li>
<li>Build capacity to fill spatio-temporal gaps in coastal acidification monitoring, by connecting people and resources to set up effective monitoring, while leveraging existing programs/sensors</li>
<li>Build capacity for mCDR readiness (monitoring, research, and validation)</li>
<li>Strengthen connections and collaborations across regional CANs</li>
</ul>
The event is free to attend. <a href="https://docs.google.com/forms/d/e/1FAIpQLSeOhkkwkc_8nESz_36Y9TdFZQz4PPQgIoNluJAak-SfgKPjTg/closedform" target="_blank" rel="noopener">Registration</a> is required. Questions can be directed to Kirstin Wakefield at <a href="mailto:kirstin@maracoos.org">kirstin@maracoos.org</a>.
&nbsp;
Who should attend?
State, Federal, and Tribal agencies and resource managers, water quality analysts, acidification researchers and modelers, mCDR industry members, blue carbon practitioners, aquaculture and fishery industry members.
&nbsp;
Hotel Room Blocks
The following hotel options are available at a discounted conference rate.
Hilton Garden Inn Annapolis
Cost: $109 per night
Last Day to Book: Saturday, June 14, 2025
<a href="https://www.hilton.com/en/book/reservation/rooms/?ctyhocn=BWIANGI&amp;arrivalDate=2025-07-18&amp;departureDate=2025-07-20&amp;groupCode=MARC&amp;room1NumAdults=1&amp;cid=OM%2CWW%2CHILTONLINK%2CEN%2CDirectLink" target="_blank" rel="noopener">CLICK HERE</a> for reservations and more information.
&nbsp;
SpringHill Suites Annapolis
Cost: $161 per night
Last Day to Book: Saturday, June 14, 2025
<a href="https://www.marriott.com/event-reservations/reservation-link.mi?id=1741119693367&amp;key=GRP&amp;guestreslink2=true&amp;app=resvlink" target="_blank" rel="noopener">CLICK HERE</a> for reservations and more information

REGISTER HERE

MACAN State of the Science and Technical Training Workshop

State of Coastal and Ocean Acidification in the U.S. Mid-Atlantic
<img loading="lazy" decoding="async" class="size-medium wp-image-5777 alignleft" src="https://macancms.3lanemarketing.com/wp-content/uploads/2025/08/Grace-Saba1-300x300.webp" alt="" width="300" height="300" srcset="https://macancms.3lanemarketing.com/wp-content/uploads/2025/08/Grace-Saba1-300x300.webp 300w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/08/Grace-Saba1-1024x1024.webp 1024w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/08/Grace-Saba1-150x150.webp 150w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/08/Grace-Saba1-768x768.webp 768w, https://macancms.3lanemarketing.com/wp-content/uploads/2025/08/Grace-Saba1.webp 1120w" sizes="auto, (max-width: 300px) 100vw, 300px" />
Coastal and ocean acidification have significant scientific and societal ramifications including the alteration of ocean biogeochemistry, ecological consequences associated with altered ecosystems, and economic losses due to the decreased survival of commercially important organisms. Guest speaker Dr. Grace Saba, Assistant Professor in the Department of Marine and Coastal Sciences, Center for Ocean Observing Leadership at Rutgers University will cover what we know and do not yet know about acidification in the Mid-Atlantic. We will examine recommendations from the Mid-Atlantic Coastal Acidification Network (MACAN) to enhance regional acidification monitoring and improve understanding of potential ecological impacts.
Free and open to the public

Dr. Saba is an Assistant Professor in the Department of Marine and Coastal Sciences, Center for Ocean Observing Leadership at Rutgers University. She also serves as co-coordinator for the Mid-Atlantic Coastal Acidification Network (MACAN). She received her B.S in Aquatic Biology from the University of California, Santa Barbara and her Ph.D. in Marine Science from the College of William and Mary.

About the Speaker

UCI Marine and Environmental Luncheon Speaker Series

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Special Announcement

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View Macan's 2024-2028 Work plan

If you are interested in learning more about MACAN and the work we do, please sign up for our <a href="https://macan.vercel.app/subscribe/">monthly newsletter</a>. You can also read our <a href="https://macancms.3lanemarketing.com/wp-content/uploads/2025/09/MACAN-5-Year-Workplan-2024-2028.pdf" target="_blank" rel="noopener">2024 to 2028 Work Plan</a>.

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About Us

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MACAN’s committed to understanding, predicting, and mitigating the impact of acidification on our oceans and coastal ecosystems.

A collaborative team committed to addressing the pressing environmental issue of coastal acidification in our region.

What is Acidification

Increased atmospheric carbon dioxide drives ocean acidification, lowering pH.

Diverse monitoring addresses complex coastal and estuarine acidification drivers.

Factors such as geography, climate, and human activities vary across different regions, impacting the extent and rate of ocean acidification.

Ocean acidification is driven by excess global carbon dioxide and water pollution from land runoff, and there are ways communities can help.

Species Impact

Converting ocean acidification data into insights about the species living in our water.

Microscopic marine plants that form the base of ocean food webs.

Blue crabs are crucial to Mid-Atlantic ecology and economy.

Gorgonian sea fans and bamboo corals create vital deep-sea habitats.

A diverse group of animals vital to fisheries.

Mid-Atlantic finfish are essential to marine ecosystems and economies alike.

Vital food web organisms with varying responses.

SAV, including eelgrass, provide vital coastal habitat.

Highly complex webs of species that mix in space and time.

News & Events

Webinars

OA Policy and mCDR

Ocean acidification action planning is states coordinating efforts to monitor, mitigate, and build resilience against acidification threats.

Marine carbon dioxide removal (mCDR) is a technique being investigated to mitigate climate change.

Resources

A wealth of informational resources on estuarine, coastal, and ocean acidification in the Mid-Atlantic.

References on estuarine, coastal, and ocean acidification in the Mid-Atlantic.

Explore our full collection of resources

Explore concise fact sheets and publications for key insights and actionable information.

Access and utilize data resources for in-depth analysis and informed decision-making.

Discover tools and materials designed to support educators in teaching and inspiring students.

Review detailed workshop reports for insights, outcomes, and actionable recommendations.

Visualize key information and data through engaging and easy-to-understand infographics.

U.S. State-Led OA Action Planning in the Mid-Atlantic

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