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

Oceanography, Год журнала: 2023, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

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Non‐stationary and interactive effects of climate and competition on pink salmon productivity

Global Change Biology, Год журнала: 2021, Номер 28(6), С. 2026 - 2040

Опубликована: Дек. 19, 2021

Pacific salmon (Oncorhynchus spp.) are exposed to increased environmental change and multiple human stressors. To anticipate future impacts of global improve sustainable resource management, it is critical understand how wild populations respond stressors associated with human-caused changes such as climate warming ocean acidification, well competition in the ocean, which intensified by large-scale production release hatchery reared salmon. Pink (O. gorbuscha) a keystone species North Ocean support highly valuable commercial fisheries. We investigated joint effects conditions abundances on productivity pink Our analysis focused Prince William Sound Alaska, because region accounts for ~50% local hatcheries releasing 600-700 million fry annually. Using 60 years data abundances, releases, ecological we find evidence that releases negatively affect productivity, likely through between juveniles nearshore marine habitats. no acidification productivity. However, leading mode 1988-1989 weakened temperature-productivity relationship altered strength intraspecific density dependence. Therefore, our results suggest non-stationary (i.e., time varying) interactive findings further highlight need management consider potential adverse within context change.

Язык: Английский

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Effect of nutrient reductions on dissolved oxygen and pH: a case study of Narragansett bay

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Май 23, 2024

To assess the consequences of nutrient reduction strategies on water quality under climate change, we investigated long-term dynamics dissolved oxygen (DO) and pH in Narragansett Bay (NB), a warming urbanized estuary Rhode Island, where nitrogen loads have declined due to extensive wastewater treatment plant upgrades. We use 15 years (January 2005-December 2019) measurements from Fixed Site Monitoring network. Nutrient-enhanced phytoplankton growth can increase DO upper column while subsequent respiration reduce enhance bottom acidification, vice-versa. observed significant decreases surface levels, concurrent with DO, associated load reduction. Surface decline was primarily attributed reduced intensity primary productivity, supported by decrease chlorophyll concentrations. Meanwhile, influence organic matter led levels 9 μmol kg-1 (approximately 0.2 mg L-1 for typical summer temperature salinity) over 15-year period, which overcame opposite solubility temperatures. In contrast, changes not exhibited discernible trends beyond natural variability, likely complex sometimes opposing influences biological activity changing river flow conditions. slight pH, water. Notably, future variations freshwater discharge, particularly linked extreme precipitation events, may further carbonate chemistry thereby impact dynamics. This study highlights necessity time series helping understand impacts environmental management practices improving coastal regions during climate.

Язык: 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, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

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Pteropods as early‐warning indicators of ocean acidification

Limnology and Oceanography, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Abstract Aragonite undersaturation ( 1) events are projected to rapidly increase in frequency and duration the Antarctic Weddell Sea by 2050. Thecosome pteropods (pelagic snails) bioindicators of ocean acidification (OA) because their aragonite shell dissolves easily at low saturation states. Here, we describe dissolution state pteropod Limacina helicina antarctica relation water column southern during austral summer 2018 as benchmark for future monitoring ongoing OA. depth profiles sampling sites were consistently close or range threshold levels 1.1–1.3) dissolution. Pteropods contributed up 69% total mesozooplankton biomass, distribution correlated positively with chlorophyll a concentration. When analyzed scanning electron microscopy, 78% investigated shells exhibited dissolution, 50–69% showed more severe Type II exceeding current projections Southern Ocean. But importantly, our study, only two specimens had most III Dissolution often co‐occurred occurred scratch marks unclear origin supporting notions that an intact periostracum protects from Where absence scratches evidence breaches, microscale/nanoscale breaches may have been important pathway commencement recent findings reduction organic content caused /low pH. The provide here allows application early‐warning indicators presumably progressing OA Sea.

Язык: 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, Год журнала: 2024, Номер 69(12), С. 3061 - 3096

Опубликована: Ноя. 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.

Язык: Английский

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Multi-month forecasts of marine heatwaves and ocean acidification extremes

Nature Geoscience, Год журнала: 2024, Номер 17(12), С. 1261 - 1267

Опубликована: Ноя. 21, 2024

Язык: Английский

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

Ecological Applications, Год журнала: 2022, Номер 32(7)

Опубликована: Май 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.

Язык: Английский

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Genetic variation underlies plastic responses to global change drivers in the purple sea urchin, Strongylocentrotus purpuratus

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2022, Номер 289(1981)

Опубликована: Авг. 31, 2022

Phenotypic plasticity and adaptive evolution enable population persistence in response to global change. However, there are few experiments that test how these processes interact within across generations, especially marine species with broad distributions experiencing spatially temporally variable temperature pCO2. We employed a quantitative genetics experiment the purple sea urchin, Strongylocentrotus purpuratus, decompose family-level variation transgenerational developmental plastic responses ecologically relevant Adults were conditioned controlled non-upwelling (high temperature, low pCO2) or upwelling (low high conditions. Embryos reared either same conditions as their parents crossed environment, morphological aspects of larval body size quantified. find evidence phenotypic different environments. Among environments, was substantial additive genetic variance for one metric when larvae developed under conditions, although this differed based on parental environment. Furthermore, cross-environment correlations indicate significant genotype-by-environment interactive effects. Therefore, is evident early stages S. emphasizing importance organismal

Язык: Английский

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Clay-shielded estuarine gastropods are better protected against environmental acidification than unshielded individuals

The Science of The Total Environment, Год журнала: 2023, Номер 866, С. 161367 - 161367

Опубликована: Янв. 4, 2023

Язык: Английский

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