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 June e-news updates are here, featuring our new OA in Canada Species Impacts series, a call for papers on mCDR interactions with ecosystems, fisheries, and aquaculture, and some highlights for OA and Canada from UNOC! View our updates here ! If you'd like to receive these updates, sign up for our membership at www.oceanacidification.ca/join-us !

Today is World Oceans Day and the last day of Ocean Week Canada 2025! All week, we’ve shared highlights from our new Ocean Acidification in Canada Species Impacts series. Today we’re excited to share our new webpage where you can explore the whole series: https://www.oceanacidification.ca/species-impacts We will continue to add to this series, so please feel free to send us any suggestions for species you would like to see featured or if you have new research to add!

Our latest poster on OA in Canada Species Impacts is here, featuring some of the unknowns of OA impacts to species in Canada! 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: Other Species Fast Facts: There are many important subsistence and ecologically-relevant  species in Canada that require more OA research, particularly in the Arctic. Examples include: Arctic char Arctic cod Kelp and seagrasses 25% ($1.14B)  of seafood species in Canada require more OA research, such as: Queen/snow crab ($500M) 1 Scallops ($195M) 1 Many regions and populations are also unstudied, and our current understanding of species impacts is often based on OA studies conducted in other regions (e.g., USA) Examples: Arctic char Queen/snow crab Kelp and seagrasses Scallops Sources: All values reported here are based on seafisheries landings values and aquaculture production values reported by DFO in 2023: https://www.dfo-mpo.gc.ca/stats/commercial/land-debarq/sea-maritimes/s2023pv-eng.htm https://www.dfo-mpo.gc.ca/stats/aqua/aqua23-eng.html   oceanacidification.ca

Our latest poster on OA in Canada Species Impacts is here, featuring OA impacts to Canada's seafood industry ! 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: Seafood Industry Fast Facts: 25% ($1.14B)  of seafood species in Canada require more research on OA impacts, such as: Queen/snow crab  (11% or $500M) Scallops  (4% or $196M) Fish  (10% or $419M) 49% ($2.21B)  of seafood species are negatively impacted  by OA 23% ($1.03B)  have reported  mixed negative effects  (negative - no effect) 3% ($113M)  have mixed responses  (negative - positive) Canada Seafood Industries ($4.5B) - Vulnerability to OA (bar chart): Impact Legend: Negative ($2.21B, 49%) Mixed (negative - no effect) ($1.03B, 23%) Mixed ($113M, 3%) Unknown in Canada ($1.14B, 25%) Species, value (millions, CDN), impact: Lobster, $1,764, negative Salmon, $889, mixed (negative - no effect) Shrimp, $312, negative Crab (other) $119, negative Clams, $109, mixed (negative - no effect) Oyster, $68, mixed Mussels*, $45, mixed Herring, $31, mixed (negative - no effect) Sea urchin, $14, negative Queen/snow crab, $500, unknown Groundfish, $365, unknown Scallop, $196, unknown Pelagic fish (other), $54, unknown Shellfish (other), $29, unknown Others, $0.2, unknown Sources: All values reported here are based on seafisheries landings values and aquaculture production values reported by DFO in 2023: https://www.dfo-mpo.gc.ca/stats/commercial/land-debarq/sea-maritimes/s2023pv-eng.htm https://www.dfo-mpo.gc.ca/stats/aqua/aqua23-eng.html     *Mussels include aquaculture only oceanacidification.ca

Our latest poster on OA in Canada Species Impacts is here, featuring the pink salmon ! 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: pink salmon Fast Facts: Scientific name: Oncorhynchus gorbuscha Range: Pacific and Arctic Canada Lifestyle: anadromous (spawn freshwater, adults live in ocean), eats herring, small invertebrates Smallest, most common Pacific salmon species Salmon in general represent 89% ($866M) of aquaculture values in Canada1 and 20% ($889M) of all seafood industries in Canada2 OA Impacts in Canada (table): Overall Calcification Growth Survival/ Abundance Reproduction Physiological Larval ▼ ? ▼ ? N/A ▼ Juvenile Mixed (▼ - NE) ? No Effect No Effect N/A Mixed (▼ - NE) Adult ? ? ? ? ? ? Only 2 OA studies 3,4 on salmon conducted in Canada Of the 6 species in Canada, pink salmon are the only salmon species with OA studies in Canada In general, early life stages of pink salmon appear fairly resilient to OA 3, but with some negative impacts to larval stage 4 Current Gaps: OA impacts to adult life stages? OA impacts to other salmon species in Canada? Uncertainties on OA impacts to early life stages? Citations: https://www.dfo-mpo.gc.ca/stats/aqua/aqua23-eng.html https://www.dfo-mpo.gc.ca/stats/commercial/land-debarq/sea-maritimes/s2023pv-eng.htm Frommel et al. 2020. Cons. Physiol.   8, 1–13. Ou et al. 2015. Nat. Clim. Chang. 5, 950–957. oceanacidification.ca

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 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 !

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