A decade-long cruise time series (2008–2018) of physical and biogeochemical conditions in the southern Salish Sea, North America

Earth system science data, Journal Year: 2024, Volume and Issue: 16(2), P. 837 - 865

Published: Feb. 8, 2024

Abstract. Coastal and estuarine waters of the northern California Current system southern Salish Sea host an observational network capable characterizing biogeochemical dynamics related to ocean acidification, hypoxia, marine heatwaves. Here, we compiled data sets from a set cruises conducted in Puget Sound (southern Sea) its boundary (Strait Juan de Fuca Washington coast). This product provides decade with consistent formatting, extended quality control, multiple units for parameters such as oxygen different end use needs conventions. All obtained high-quality temperature, salinity, inorganic carbon, nutrient, observations provide insight into dynamic distribution physical conditions this large urban estuary complex on west coast North America. At all sampling stations, conductivity–temperature–depth (CTD) casts included sensors measuring conductivity, pressure, concentrations. Laboratory analyses discrete water samples collected at stations throughout column Niskin bottles provided measurements dissolved carbon (DIC), oxygen, nutrient (nitrate, nitrite, ammonium, phosphate, silicate), total alkalinity (TA) content. includes 35 research cruises, including 715 oceanographic profiles, >7490 sensor oxygen; ≥6070 samples; ≥4462 variables (i.e., DIC TA). The comprising cruise compilation collectively characterize spatial temporal variability region ranges (temperature = 6.0–21.8 ∘C, salinity 15.6–34.0) (oxygen 12–481 µmol kg−1, 1074–2362 1274–2296 kg−1) central understanding acidification hypoxia productive numerous interacting human impacts ecosystems. conform climate-quality observing guidelines Global Ocean Acidification Observing Network, US National Oceanic Atmospheric Administration's Program, community best practices. ongoing time series supports coastal monitoring objectives Center Administration (NOAA) Research programs, it diverse users information needed frame biological research, validate numerical models, inform state tribal fisheries management, support decision-makers. 2008–2018 time-series used publication are available https://doi.org/10.25921/zgk5-ep63 (Alin et al., 2022).

Language: Английский

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Single‐Larva RNA Sequencing Reveals That Red Sea Urchin Larvae Are Vulnerable to Co‐Occurring Ocean Acidification and Hypoxia

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

ABSTRACT Anthropogenic carbon dioxide emissions have been increasing rapidly in recent years, driving pH and oxygen levels to record low concentrations the oceans. Eastern boundary upwelling systems such as California Current System (CCS) experience exacerbated ocean acidification hypoxia (OAH) due physical chemical properties of transported deeper waters. Research efforts significantly increased years investigate deleterious effects climate change on marine species, but not focused impacts simultaneous OAH stressor exposure. Additionally, few studies explored physiological these environmental stressors earliest life stages, which are more vulnerable represent natural population bottlenecks organismal cycles. The response ecologically commercially important red sea urchin ( Mesocentrotus franciscanus ) was assessed by exposing larvae a variety conditions, mimicking range relevant conditions encountered currently near future along CCS. Skeleton dissolution, larval development, gene expression show with clearly delineated thresholds that were related severity. Skeletal dissolution induction Acid‐sensing Ion Channel 1A at 7.94/5.70 DO mg/L provide particularly sensitive markers OAH, dramatic shifts morphology detected pH/DO transition 7.71/3.71–7.27/2.72 mg/L. Experimental simulations describe establish molecular exposure will fishery management tools predict patterns recruitment forecast dynamics.

Language: Английский

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Investigation of the Influence of Hypercapnia on the Physiology of Ovigerous West Coast Rock Lobsters, Jasus lalandii, and Their Embryonic Development

Biology, Journal Year: 2025, Volume and Issue: 14(2), P. 132 - 132

Published: Jan. 27, 2025

The West Coast rock lobster, Jasus lalandii, is a key ecological species and provides an important fishery resource in South Africa Namibia. It found along the west coast of southern dynamic Benguela Current upwelling system. low seawater pH this system expected to decline further due ocean acidification increase terms frequency severity. lobster has therefore respond frequent rapid changes other environmental impacts that are predicted become more adverse future. Although responses such conditions known for mature male juvenile lobsters, there lack information on females later embryonic development. We addressed by analysing sensitivity ovigerous (“berried”) female WCRLs their eggs/embryos hypercapnia (high pCO2, pH) formulated following research questions: (1) Can berried swiftly large pH? (2) What physiological mechanisms facilitate potential response rapidly declining pH, i.e., acute hypercapnia? (3) Does persist during prolonged (4) Are impacted To investigate this, we exposed (pH 7.5) chronic (up 60 days at 7.5 7.8) hypercapnia. applied extracellular acid–base analysis, microscopic examination egg growth development, SEM exoskeleton structure membranes. results revealed efficiently means increasing bicarbonate concentrations haemolymph. Moreover, embryo development not hypercapnia, but shows geographical area-specific differences. conclude embryos J. lalandii as resilient previously shown males juveniles.

Language: Английский

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Variability in storm season intensity modulates ocean acidification conditions in the northern Strait of Georgia

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 6, 2025

Large changes in marine CO2 chemistry manifest areas with weakly-buffered seawater where ocean acidification (OA) acts concert natural additions. These settings can exhibit periods of extreme OA the form multiple co-occurring stressors, including calcite undersaturation and low pH. Such conditions were observed northern Strait Georgia, on northeast Pacific coast, spanned a 3-year period. Here, we utilized an 8-year, highly-resolved record partial pressure total dissolved inorganic carbon to decompose drivers this OA. We find that variability storm season intensity shaped extent conservative mixing biogeochemical such manifests arise setting. Extreme manifested during years weak seasons due direct indirect factors reduced impact mixing. This sensitivity highlights how vulnerable Georgia is subtle environmental forcing provides some predictive capacity for over coming year. results illustrate not "slow burn" process within settings, but rather invokes intensification poorly understood biological implications.

Language: Английский

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Regression-based characterization of the marine carbonate system across shelf and nearshore Waters of queen Charlotte sound

Marine Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 104511 - 104511

Published: March 1, 2025

Language: Английский

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Benthic biogeochemical processes and fluxes in the hypoxic and acidified northern Gulf of Mexico (nGoM), part I: Carbonate dissolution from in situ microprofiles

Marine Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 104515 - 104515

Published: April 1, 2025

Language: Английский

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Advancing an integrated understanding of land–ocean connections in shaping the marine ecosystems of coastal temperate rainforest ecoregions

Limnology and Oceanography, Journal Year: 2024, Volume and Issue: 69(12), P. 3061 - 3096

Published: Nov. 18, 2024

Abstract Land and ocean ecosystems are strongly connected mutually interactive. As climate changes other anthropogenic stressors intensify, the complex pathways that link these systems will strengthen or weaken in ways currently beyond reliable prediction. In this review we offer a framework of land–ocean couplings their role shaping marine coastal temperate rainforest (CTR) ecoregions, where high freshwater materials flux result particularly strong connections. Using largest contiguous expanse CTR on Earth—the Northeast Pacific (NPCTR)—as case study, integrate current understanding spatial temporal scales interacting processes across continuum, examine how structure defining features from nearshore to offshore domains. We look ahead potential effects coupled meta‐ecosystem. Finally, key data gaps provide research recommendations for an integrated, transdisciplinary approach with intent guide future evaluations management ongoing impacts NPCTR CTRs globally. light extreme events including heatwaves, fire, flooding, which occurring almost annually, integrative agenda is not only necessary but urgent.

Language: Английский

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Extremes and Short‐Term Fluctuations in Coastal Ocean Acidification and Hypoxia

Journal of Geophysical Research Oceans, Journal Year: 2024, Volume and Issue: 129(11)

Published: Nov. 1, 2024

Abstract In Eastern boundary upwelling systems, such as the California Current System (CCS), seasonal brings low oxygen and pH waters to continental shelf, causing ocean acidification hypoxia (OAH). The location, frequency, intensity of OAH events is influenced by a combination large‐scale climatic trends, changes, small‐scale circulation, local human activities. Here, we use results from two 20‐year long submesoscale‐resolving simulations Northern Southern U.S. West Coast (USWC) for 1997–2017 period, describe characteristics drivers events. These reveal emergence hotspots in which declines are accompanied localized short‐term extremes OAH. While show substantial variability, significant intra‐seasonal fluctuations occur, reflecting interaction between low‐ high‐frequency forcings that shape mechanisms behind decreases vary along USWC. remineralization remains dominant force these throughout coast, physical transport partially offsets effects Central California, but contributes loss on Coast. Critically, decline not sufficient predict occurrence duration extremes. Locally enhanced biogeochemical rates, including shallow benthic rapid wind‐driven transport, spatial temporal patterns coastal

Language: Английский

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Mixing and dilution controls on marine CO₂ removal using alkalinity enhancement

Environmental Research Letters, Journal Year: 2024, Volume and Issue: 19(10), P. 104039 - 104039

Published: Aug. 29, 2024

Abstract Marine CO 2 removal (CDR) using enhanced-alkalinity seawater discharge was simulated in the estuarine waters of Salish Sea, Washington, US. The high-alkalinity would be generated bipolar membrane electrodialysis technology to remove acid and alkaline stream returned sea. Response receiving evaluated a shoreline resolving hydrodynamic model with biogeochemistry, carbonate chemistry. Two sites, two deployment scales, each enhanced TA 2997 mmol m −3 pH 9 were simulated. effects on air-sea flux near-field as well over larger estuary wide domain assessed. large-scale (addition 164 Mmoles yr −1 ) small embayment (Sequim Bay, 12.5 km resulted 2066 T (45% total simulated) at rate 3756 −2 , higher than 63 required globally 1.0 GT . It also reduced acidity bay, ΔpH ≈ +0.1 units, an amount comparable historic impacts anthropogenic acidification Sea. mixing dilution added distance from source results CDR rates such that 2176 removed >1000 fold area rest domain. There is potential for more occurring beyond region modeled. reduction outgassing between October May accounts much 90% Of total, only 375 (8%) open shelf portion With shallow depths limiting vertical mixing, nearshore may provide rapid alkalinity enhancement relative deeper oceanic sites.

Language: Английский

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Effects of urban eutrophication on pelagic habitat capacity in the Southern California Bight

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Oct. 1, 2024

Land-based nutrient inputs to the ocean have been linked increased coastal productivity, subsurface acidification and O 2 loss, even in upwelling systems like Southern California Bight. However, whether eutrophication alters [environment’s] capacity support key taxa has yet be evaluated for this region. Here, we assess impact of land-based on availability aerobic calcifying habitat pelagic using model simulations. We find that acute, lethal conditions are not commonly induced epipelagic surface waters, but sublethal, ecologically relevant changes pervasive. reduce potential calcifier during late summer, when viable is at its seasonal minimum. A region annually recurring compression predicted 30 – 90 km from mainland, southeast Santa Catalina Island. both vertically compressed by, average, 25%, can as much 60%. This effect traced enhanced remineralization organic matter originates coast. These findings suggest effects nutrients restricted chemistry extend multiple ecological economic importance. Considerable uncertainty exists, however, how translates population-level effects.

Language: Английский

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