The Combined Effects of Ocean Acidification and Respiration on Habitat Suitability for Marine Calcifiers Along the West Coast of North America

Journal of Geophysical Research Oceans, Journal Year: 2024, Volume and Issue: 129(4)

Published: April 1, 2024

Abstract The California Current Ecosystem (CCE) is a natural laboratory for studying the chemical and ecological impacts of ocean acidification. Biogeochemical variability in region due primarily to wind‐driven near‐shore upwelling cold waters that are rich re‐mineralized carbon poor oxygen. coastal regions exposed surface with increasing concentrations anthropogenic CO 2 (C anth ) from exchanges atmosphere shoreward transport mixing upwelled water. drives intense cycling organic matter created through photosynthesis degraded biological respiration subsurface habitats. We used an extended multiple linear‐regression approach determine spatial temporal C respired bio CCE based on cruise data 2007, 2011, 2012, 2013, 2016, 2021. Over region, accumulation rate increased 0.8 ± 0.1 μmol kg −1 yr northern latitudes 1.1 further south. rates decreased values about ∼0.3 at depths near 300 m. These correspond total pH decreases averaged 0.002 ‐1 ; whereas, aragonite saturation state ranged 0.006 0.011 . impact uptake was decrease amount oxygen consumption required cross critical thresholds (i.e., calcification, dissolution) marine calcifiers significantly lower recent cruises than pre‐industrial period because addition

Language: Английский

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Acidification of the Global Surface Ocean: What We Have Learned from Observations

Oceanography, Journal Year: 2023, Volume and Issue: unknown

Published: Jan. 1, 2023

The chemistry of the global ocean is rapidly changing due to uptake anthropogenic carbon dioxide (CO2). This process, commonly referred as acidification (OA), negatively impacting many marine species and ecosystems. In this study, we combine observations in surface collected by NOAA Pacific Marine Environmental Laboratory Atlantic Oceanographic Meteorological scientists their national international colleagues over past four decades, along with model outputs, provide a high-resolution, regionally varying view fugacity, carbonate ion content, total hydrogen pH on scale, aragonite calcite saturation states selected time intervals from 1961 2020. We discuss major roles played air-sea CO2 uptake, warming, local upwelling processes, declining buffer capacity controlling spatial temporal variability these parameters. These changes are occurring regions that would normally be considered OA refugia, thus threatening protection for stocks sensitive increasing potential expanding biological impacts.

Language: Английский

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Advancing bioenergetics-based modeling to improve climate change projections of marine ecosystems

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 732, P. 193 - 221

Published: Jan. 31, 2024

Climate change has rapidly altered marine ecosystems and is expected to continue push systems species beyond historical baselines into novel conditions. Projecting responses of organisms populations these environmental conditions often requires extrapolations observed conditions, challenging the predictive limits statistical modeling capabilities. Bioenergetics provides mechanistic basis for projecting climate effects on living resources in a long history development, been applied widely fish other taxa. We provide our perspective 4 opportunities that will advance ability bioenergetics-based models depict changes productivity distribution fishes organisms, leading more robust projections impacts. These are (1) improved depiction bioenergetics processes derive realistic individual-level response(s) complex (2) innovations scaling project at population food web levels, (3) coupling between spatial dynamics better represent local- regional-scale differences distributions (4) model validation ensure next generation can be used with known sufficient confidence. Our focus specific enable critical advancements position community make accurate individuals, populations, webs, ecosystems.

Language: Английский

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Global Synthesis of the Status and Trends of Ocean Acidification Impacts on Shelled Pteropods

Oceanography, Journal Year: 2023, Volume and Issue: unknown

Published: Jan. 1, 2023

The accumulation of anthropogenic CO2 in the ocean has major ecological, socioeconomic, and biogeochemical impacts, with repercussions for as a critical carbon sink. Ocean acidification (OA) disproportionally affects marine calcifiers, among which pelagic zooplanktonic pteropods play significant role carbonate export. pteropod, due to susceptibility its aragonite shell rapid dissolution, is one most vulnerable groups key indicator OA regional monitoring, but sensitivities have not yet been extrapolated over global scales. To delineate spatial temporal changes pteropod status rate change were evaluated, based on gridded climatologies observations using Regional Modeling System (ROMS) biogeochemical/ecosystem model. Pteropods dominate polar upwelling regions characterized by low saturation state buffering capacity, where extended subsurface dissolution projected. We show that are susceptible regions, subpolar North Pacific, eastern boundary system particularly California Humboldt Current Systems. Rates corresponding increases projected be fastest South Equatorial Currents.

Language: Английский

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Assessing benthic invertebrate vulnerability to ocean acidification and de-oxygenation in California: The importance of effective oceanographic monitoring networks

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(2), P. e0317906 - e0317906

Published: Feb. 18, 2025

Greenhouse gas emissions from land-use change, fossil fuel, agriculture, transportation, and electricity sectors expose marine ecosystems to overlapping environmental stressors. Existing climate vulnerability assessment methods analyze the frequency of extreme conditions but often minimally consider how data gaps hinder assessments. Here, we show an approach that assesses uncertainty introduced by monitoring gaps, using a case study ocean acidification deoxygenation in coastal California. We employ 5 million publicly available oceanographic observations existing studies on species responses low pH, oxygen calculate for six ecologically economically valuable benthic invertebrate species: red sea urchin ( Mesocentrotus franciscanus ), purple Strongylocentrotus purpurpatus warty cucumber Apostichopus parvimensis pink shrimp Pandalus jordani California spiny lobster Panulirus interruptus Dungeness crab Metacarncinus magister ). Further, evaluate efficacy current programs examining heighten associated uncertainty. find most organisms experience (<35% saturation) less frequently than pH < 7.6) conditions. It is only deeper dwelling (>75 m depth) life stages such as adults embryos, juveniles, more frequent exposure Adult crabs strongest seasonal variation exposure. Though these trends are intriguing, remains despite well-documented declines strengthening upwelling central portions Current. Seasonal biases collection sparse near benthos at depths where stressful undermine estimates. Herein provide concrete examples fisheries may be impacted our findings, suggestions incorporating into management plans. By limiting scope waters assessing limitations presented coverage, this aims granular, actionable framework policymakers managers can build prioritize targeted enhancements sustained funding recommendations.

Language: Английский

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Pelagic calcifiers face increased mortality and habitat loss with warming and ocean acidification

Ecological Applications, Journal Year: 2022, Volume and Issue: 32(7)

Published: May 18, 2022

Global change is impacting the oceans in an unprecedented way, and multiple lines of evidence suggest that species distributions are changing space time. There increasing environmental stressors act together to constrain habitat more than expected from warming alone. Here, we conducted a comprehensive study how temperature aragonite saturation state limit Limacina helicina, globally distributed pteropods ecologically important pelagic calcifiers indicator for ocean change. We co-validated three different approaches evaluate impact acidification (OWA) on survival distribution this California Current Ecosystem. First, used colocated physical, chemical, biological data large-scale west coast cruises regional time series; second, multifactorial experimental incubations OWA impacts pteropod survival; third, validated relationships found against global carbonate chemistry. work revealed mortality increases under OWA, while suitability indices L. helicina multi-stressor framework essential understanding distributions. In Ecosystem habitats, where living close their thermal maximum already, additional through unabated fossil fuel emissions (RCP 8.5) dramatically reduce suitability.

Language: Английский

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Emerging Applications of Longstanding Autonomous Ocean Carbon Observations

Oceanography, Journal Year: 2023, Volume and Issue: unknown

Published: Jan. 1, 2023

For over two decades, NOAA’s Pacific Marine Environmental Laboratory (PMEL) has been developing and deploying autonomous ocean carbon measurement technologies. PMEL currently maintains a network of air-sea CO2 acidification time series measurements on 33 surface buoys, including the world’s longest record measured from buoy. These sites are located in every basin variety ecosystems, coastal to open sub-polar tropical. The provides more than half today’s carbonate chemistry time-series records that qualify as long-term, publicly available, collected at subseasonal timescales. Here, we briefly review motivation for establishing network, research applications made possible observations, how sustained generate unique information about changing needed inform mitigation adaptation approaches world.

Language: Английский

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Sea butterflies in a pickle: reliable biomarkers and seasonal sensitivity of Limacina retroversa to ocean acidification in the Gulf of Maine

Conservation Physiology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

Abstract The passive dissolution of anthropogenically produced CO2 into the ocean system is reducing pH and changing a suite chemical equilibria, with negative consequences for some marine organisms, in particular those that bear calcium carbonate shells. Although our monitoring these changes has improved, we have not developed effective tools to translate observations, which are typically saturation state, ecologically relevant predictions biological risks. One potential solution develop bioindicators: variables clear relationship environmental risk factors can be used assessment management. Thecosomatous pteropods group pelagic shelled gastropods, whose responses been suggested as bioindicators acidification owing their sensitivity both laboratory natural environment. Using five exposure experiments, occurring across four seasons running up 15 days, describe consistent between shell transparency duration exposure, well identify genes could further study. We clarify variations thecosome due seasonality, resolving prior uncertainties demonstrating range phenotypic plasticity. These biomarkers stress implemented ecosystem models programmes regions where found, whilst approach will serve an example other on how bridge gap point-based biologically assessments health.

Language: Английский

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