Our latest poster on OA in Canada Species Impacts is here, featuring the Pacific oyster ! Browse or download a high-resolution printable version and feel free to share widely! Poster text is provided below. Download our full-resolution, printable version: More about the OA in Canada Species Impacts Series: To summarize the current knowledge of OA impacts on species in Canada, the OA CoP has produced a poster series on how species are impacted by OA in Canada. The information presented here is based on the most current scientific literature (peer-reviewed, published papers) of studies conducted in Canada. We also highlight current gaps in our knowledge and areas that require additional research across Canada. These infographics are intended not only to highlight concerning OA impacts on important species in Canada, but are also meant to act as catalysts to support filling the gaps in our knowledge of OA impacts to species across Canada. Poster Text: OA in Canada Species Impacts: Pacific oyster Fast Facts: Scientific name: Crassostrea gigas Range: Pacific (Asia, Canada, US) Lifestyle: suspension feeder, can form reefs Introduced to Canada from Asia as a popular aquaculture species 2nd most valuable aquaculture species in BC (behind salmon) valued at $16.1M in 20231 OA Impacts in Canada (table): Overall Calcification Growth Survival/ Abundance Reproduction Physiological Larval ▼ ▼ ▼ ? N/A ▼ Juvenile ▼ ? ? ▼ N/A ? Adult ? ? ? ? ▲* ? OA is already negatively impacting oysters in the northeastern Pacific2, partially prompting the development of the BC OAH Action Plan3 and Climate Ready BC Seafood Program4 Only 4 OA studies on Pacific oysters conducted in Canada5-8, including oyster microbiomes8 *Research shows selective breeding can help build resilience to OA impacts in oysters5,6 Soda ash as buffer can have negative impacts9 OA impacts to Pacific oysters being studied by DFO, Hakai Institute, VIU, UBC, and others Current Gaps: OA impacts to juvenile and adult life stages? OA impacts on summer mortality syndrome? Feasibility and success of selective breeding? Citations: https://www.dfo-mpo.gc.ca/stats/aqua/aqua23-eng.html Barton et al. 2015. Oceanog. 28, 146–59.  BC OAH Action Plan (based on Evans et al. 2023) https://news.gov.bc.ca/releases/2023AF0033-000799 Nordio et al. 2021. ICES Jour. Mar. Sci. 78, 360–367. Wright-LaGreca et al. 2022. Mar. Biotechnol. 24, 116–124. Brown et al. 2020. Ecology. 101, e03073. Zhong et al. 2024. Appl. Environ. Microbiol. 90, e00052-24. Mackenzie et al. 2022. Appl. Environ. Microbiol. 88, e01654-22. oceanacidification.ca

Ocean Week Canada 2025 is here! To celebrate, the OA CoP is releasing a new series of resources on how Ocean Acidification impacts important species in Canada, starting tomorrow. Follow along all week to learn more! You can also find us on LinkedIn , Bluesky , Instagram , and Facebook !

Our May e-news updates are here, featuring a carbonate chemistry course offered this summer at Bamfield Marine Sciences Centre, surveys for the upcoming UN Ocean Conference, and new resources from the OA CoP coming soon for Ocean Week Canada (June 1 - 8)! View our updates here ! If you'd like to receive these updates, sign up for our membership at www.oceanacidification.ca/join-us !

Our latest poster on OA in Canada Species Impacts is here, featuring the American lobster ! Browse or download a high-resolution printable version and feel free to share widely! Poster text is provided below. Download our full-resolution, printable version: More about the OA in Canada Species Impacts Series: To summarize the current knowledge of OA impacts on species in Canada, the OA CoP has produced a poster series on how species are impacted by OA in Canada. The information presented here is based on the most current scientific literature (peer-reviewed, published papers) of studies conducted in Canada. We also highlight current gaps in our knowledge and areas that require additional research across Canada. These infographics are intended not only to highlight concerning OA impacts on important species in Canada, but are also meant to act as catalysts to support filling the gaps in our knowledge of OA impacts to species across Canada. Poster Text: OA in Canada Species Impacts: American Lobster Fast Facts: Scientific name: Homarus americanus Range: Atlantic Canada and US Lifestyle: rocky-sandy seafloor, eats shellfish and other invertebrates Canada’s  most valuable  fishery ( $1.8B  in 20231)  ~39% of all seafood industry values in Canada ( ~50% for Atlantic Canada)1 OA Impacts in Canada (table): Overall Calcification Growth Survival/ Abundance Reproduction Physiological Larval Mixed (▼ - NE) ? Mixed (▼ - NE) Mixed (▼ - NE) N/A ▼ Juvenile ▼ ? ▼ ▼ N/A ▼ Adult ▼ ? ▼ ▼ ? ▼ Only 5 OA studies of lobster conducted in Canada2-6 Overall, OA negatively impacts lobsters Growth and survival are reduced by OA, particularly during juvenile life stages3,5,6 Models show OA negatively impacts lobster population density6 OA impacts to lobsters being studied by DFO (St. Andrews Biological Station, NB, Quebec region) Current Gaps: OA impacts to lobster reproduction? OA impacts to lobster calcification? Uncertainty in OA impacts to larval stages? Citations: https://www.dfo-mpo.gc.ca/stats/stats-eng.htm Klymasz-Swartz et al. 2019. Comp. Biochem. Physiol. A. 235, 202–210. Menu-Courey et al. 2019. Mar. Environ. Res. 143, 111–123. Keppel et al. 2012. J. Northwest Atl. Fish. Sci. 44, 61–66. Noisette et al. 2021. Metabolites. 11, 584. Tai et al. 2021. Sci. Rep. 11, 23330. oceanacidification.ca

In an effort to improve connections between ocean acidification researchers, community members, and OA resources, we are excited to launch our new database of OA experts across Canada. Please feel free to explore and let us know what you think!   For people who would like to add themselves to our database, we have created a Google form for you to fill out your desired contact information and details on your areas of research/expertise. Links, more information, and instructions can be found on our website. Explore and/or add yourself to the database here! ​

We are excited to announce the launch of our new database of publications on ocean acidification research conducted in Canada! View, search, and export citations from the database on Zotero, or explore a simple spreadsheet version directly on our website! Start exploring the database here ! The database is updated regularly, but if you know of a publication that you believe is missing from our database, please let us know !

Our April e-news updates are here, featuring TWO(!) new databases for our community: and OA in Canada Experts and Publications database! View our updates here ! If you'd like to receive these updates, sign up for our membership at www.oceanacidification.ca/join-us !

Our March e-news updates are here, featuring an upcoming webinar from the GOA-ON Biology Working Group, a call for research papers on the environmental impacts of ocean alkalinity enhancement (OAE), and other new research. View our updates here ! If you'd like to receive these updates, sign up for our membership at www.oceanacidification.ca/join-us !

A new research paper led by OA CoP Co-Lead, Wiley Evans, examining the impacts of storm seasons on ocean acidification conditions along the west coast of British Columbia was recently published in Scientific Reports . The article was covered in a press release from the Tula Foundation and an article in the Vancouver Sun. Stormy waters off Calvert Island, British Columbia in October. Photo by Grant Callegari/Hakai Institute. Tula Foundation press release: Not a Slow Burn: Research Reveals a Driver of Extreme Ocean Acidification Conditions From the press release: “The extreme ocean acidification conditions that follow weak storm seasons have the potential to impact every shell producer, from bivalves like clams and oysters to crustaceans,” says Wiley Evans Vancouver Sun article: New research links storm season intensity in B.C. with ocean acidification in Strait of Georgia Paper:  Evans, W., Campbell, K., Weekes, C.  et al.  Variability in storm season intensity modulates ocean acidification conditions in the northern Strait of Georgia.  Sci Rep   15 , 4505 (2025).  https://doi.org/10.1038/s41598-025-88241-8

Our Feb. e-news updates are here, featuring a new paper from OA CoP co-lead, a call for research paper on the environmental impacts of ocean alkalinity enhancement (OAE), and other new research. View our updates here ! If you'd like to receive these updates, sign up for our membership at www.oceanacidification.ca/join-us !

Our Jan. e-news updates are here, with details on the upcoming DFO/NOAA OA Collaboration meeting, OAE training and data protocol review opportunities, and new research. View our updates here ! If you'd like to receive these updates, sign up for our membership at www.oceanacidification.ca/join-us !

The OA Community of Practice was recently refunded by MEOPAR under their new Strategic Science Fund in late 2024! We are excited to reconnect and continue to support OA research, community efforts, and knowledge mobilization across Canada! Please check back for more updates in 2025! ​ Want to connect? Have an idea for our newly relaunched OA CoP? Please get in touch! coordinator@oceanacidification.ca