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0861 |aFs97-18/410E-PDF
1001 |aLizotte, Martine, |eauthor.
24510|aAcidification and CO2-driven conditions in the Estuary and Gulf of St. Lawrence during 2024 / |bMartine Lizotte, Marjolaine Blais, Joël Chassé, Peter S. Galbraith, Anne-Josée Hébert, and Michel Starr.
264 1|aMont-Joli, QC : |bRegional Sciences Branch, Quebec Region, Pelagic and Ecosystemic Sciences Division, Fisheries and Oceans Canada, Maurice Lamontagne Institute, |c2026.
264 4|c©2026
300 |a1 online resource (vi, 71 pages) : |billustrations (chiefly colour), colour maps.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian technical report of hydrography and ocean sciences, |x1488-5417 ; |v410
504 |aIncludes bibliographical references (pages 28-42).
5203 |a"This report presents an overview of marine acidification and CO2-driven conditions in the Estuary and Gulf of St. Lawrence for 2024, based on data collected through the Atlantic Zone Monitoring Program and the Aquatic Climate Change Adaptation Services Program, led by Fisheries and Oceans Canada. Regional observations are compared against climatological means to assess anomalies and trends of the carbonate system. In 2024, key indicators, including pHT, the carbonate system vulnerability index (CSVI), partial pressure of CO2 (pCO2), saturation states of aragonite (ΩA) and calcite (ΩC), and the substrate-inhibitor ratio (SIR), reveal widespread and depth-dependent stressor patterns across the region. From 2020 and continuing into 2024, the 200 m depth horizon stands out as a zone of sustained vulnerability, with multiple indicators exceeding established stress thresholds and record-setting anomalies in several regions. Hypercapnia is observed at this depth in all deep regions except the Centre Gulf, indicating elevated CO2 levels that may impair physiological function in marine organisms. The upward shoaling of proxies for calcium carbonate formation (SIR) and dissolution (ΩA and ΩC) may compress optimal habitat for calcifiers, with the Northwest Gulf and the Estuary emerging as hotspots of reduced buffering capacity and heightened sensitivity to CO2-driven conditions"--Abstract, page v.
546 |aIncludes abstracts in English and French.
650 0|aOcean acidification|zQuébec (Province)|zSaint Lawrence River Estuary.
650 0|aOcean acidification|zSaint Lawrence, Gulf of.
650 0|aSeawater|xCarbon dioxide content|zQuébec (Province)|zSaint Lawrence River Estuary.
650 0|aSeawater|xCarbon dioxide content|zSaint Lawrence, Gulf of.
650 6|aMer|xAcidification|zQuébec (Province)|zSaint-Laurent, Estuaire du.
650 6|aMer|xAcidification|zSaint-Laurent, Golfe du.
650 6|aEau de mer|xTeneur en gaz carbonique|zQuébec (Province)|zSaint-Laurent, Estuaire du.
650 6|aEau de mer|xTeneur en gaz carbonique|zSaint-Laurent, Golfe du.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aMaurice Lamontagne Institute, |eissuing body.
7102 |aGulf Fisheries Centre (Canada), |eissuing body.
830#0|aCanadian technical report of hydrography and ocean sciences ;|v410.|w(CaOODSP)9.504781
85640|qPDF|s6.71 MB|uhttps://publications.gc.ca/collections/collection_2026/mpo-dfo/fs97-18/Fs97-18-410-eng.pdf