Pteropods on the edge: Cumulative effects of ocean acidification, warming, and deoxygenation

Bednaršek, Nina; Harvey, Chris J.; Kaplan, Isaac C.; Feely, Richard A.; Možina, Jasna

doi:10.1016/j.pocean.2016.04.002

Cited by 93 publications

(96 citation statements)

References 141 publications

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“…The favorable carbonate conditions we observed likely provided some offset to thermal stress in 2014 and 2016, while moderate upwelling in spring 2015 produced less favorable carbonate conditions and may have negatively impacted organisms despite cooler temperatures and increased food availability. Third, Bednaršek et al () note that euthecosome pteropods are omnivores, and many species feed using mucous nets. These feeding strategies may have allowed some molluscs to increase despite overall reduced primary production and smaller phytoplankton sizes during the Warm Anomaly and El Niño, perhaps also offsetting negative effects of thermal stress.…”

Section: Resultsmentioning

confidence: 99%

Biogeochemical Anomalies at Two Southern California Current System Moorings During the 2014–2016 Warm Anomaly‐El Niño Sequence

et al. 2019

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We analyzed impacts of the 2014–2015 Pacific Warm Anomaly and 2015–2016 El Niño on physical and biogeochemical variables at two southern California Current System moorings (CCE2, nearshore upwelling off Point Conception; CCE1, offshore California Current). Nitrate and Chl‐a fluorescence were <1 μM and <1 Standardized Fluorescence Unit, respectively, at CCE2 for the entire durations of the Warm Anomaly and El Niño, the two longest periods of such low values in our time series. Negative nitrate and Chl‐a anomalies at CCE2 were interrupted briefly by upwelling conditions in spring 2015. Near‐surface temperature anomalies appeared simultaneously at both moorings in spring 2014, indicating region‐wide onset of Warm Anomaly temperatures, although sustained negative nitrate and Chl‐a anomalies only occurred offshore at CCE1 during El Niño (summer 2015 to spring 2016). Warm Anomaly temperature changes were expressed more strongly in near‐surface (<40 m) than subsurface (75 m) waters at both moorings, while El Niño produced comparable temperature anomalies at near‐surface and subsurface depths. Nearshore Ωaragonite at 76 m showed notably fewer undersaturation events during both warm periods, suggesting an environment more conducive to calcifying organisms. Planktonic calcifying molluscs (pteropods and heteropods) increased markedly in springs 2014 and 2016 and remained modestly elevated in spring 2015. Moorings provide high‐frequency measurements essential for resolving the onset timing of anomalous conditions and frequency and duration of short‐term (days‐to‐weeks) perturbations (reduced nitrate and aragonite undersaturation events) that can affect marine organisms.

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Section: Resultsmentioning

confidence: 99%

Biogeochemical Anomalies at Two Southern California Current System Moorings During the 2014–2016 Warm Anomaly‐El Niño Sequence

et al. 2019

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“…Advancing from physiological to population-level effects is obviously marked by complexities that require further understanding and biomarker studies correlated with prolonged exposures. However, a strong correlation of multiple drivers with cellular responses make pteropods strong candidate indicators for cumulative effects (Bednaršek et al, 2016a). This is supported by studies in which multiple driver effects have been linked to pteropod long-term population declines in the North Atlantic (Beaugrand et al, 2013) and the North Sea (Beare et al, 2013).…”

Section: Mechanisms Of Oxidative Stress Implications Overall Pteropodmentioning

confidence: 94%

“…The most dominant species in the CCS, i.e., Limacina helicina, has demonstrated increased susceptibility that is further exacerbated under thermal stress (Lischka et al, 2011;Lischka and Riebesell, 2012;Gardner et al, 2018). This susceptibility is demonstrated through increased shell dissolution and reduced metabolic activity, calcification, growth, and survival (Lischka and Riebesell, 2012;Maas et al, 2015;Bednaršek et al, 2016aBednaršek et al, , 2017bMoya et al, 2016;Gardner et al, 2018). Given the importance of pteropods as a food resource for a variety of ecologically and commercially important marine species in the CCS (Aydin et al, 2005;Karpenko et al, 2007;Armstrong et al, 2008), it is an imperative to understand their sustainability under global environmental change scenarios.…”

Section: Introductionmentioning

confidence: 99%

El Niño-Related Thermal Stress Coupled With Upwelling-Related Ocean Acidification Negatively Impacts Cellular to Population-Level Responses in Pteropods Along the California Current System With Implications for Increased Bioenergetic Costs

et al. 2018

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El Niño Negatively Impacts Pelagic Gastropods of a single parameter in the statistical analyses. High quantities of polyunsaturated fatty acids are susceptible to oxidative stress because of LPX, resulting in the loss of lipid reserves and structural damage to cell membranes, a potential mechanism explaining extreme pteropod sensitivity to low ar . Accumulation of oxidative damage requires metabolic compensation, implying energetic trade-offs under combined thermal and low ar and pH stress. Oxidative stress biomarkers can be used as early-warning signal of multiple stressors on the cellular level, thereby providing important new insights into factors that set limits to species' tolerance to in situ multiple drivers.

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“…Marine species and ecosystems that benefit people have already been harmed by ocean acidification. Laboratory studies have shown that CO 2 -driven acidification decreases calcification among mollusks, crustaceans, stony corals, and coralline algae, reduces the survival of juvenile mollusks and crustaceans (Kroeker et al 2013, Bednaršek et al 2016, and decreases reproductive success for many species, including corals (Albright et al 2010). Oyster hatcheries in the United States have experienced heightened larval shellfish mortality due to acidification (Barton et al 2015(Barton et al , 2012, depressing industry revenues in the Pacific Northwest and endangering over 3000 jobs in Washington state during the mid-2000s.…”

Section: Introductionmentioning

confidence: 99%

Attributing ocean acidification to major carbon producers

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Ekwurzel

Doney

et al. 2019

Environ. Res. Lett.

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Recent research has quantified the contributions of CO 2 and CH 4 emissions traced to the products of major fossil fuel companies and cement manufacturers to global atmospheric CO 2 , surface temperature, and sea level rise. This work has informed societal considerations of the climate responsibilities of these major industrial carbon producers. Here, we extend this work to historical (1880-2015) and recent acidification of the world's ocean. Using an energy balance carbon-cycle model, we find that emissions traced to the 88 largest industrial carbon producers from 1880-2015 and 1965-2015 have contributed ∼55% and ∼51%, respectively, of the historical 1880-2015 decline in surface ocean pH. As ocean acidification is not spatially uniform, we employ a three-dimensional ocean model and identify five marine regions with large declines in surface water pH and aragonite saturation state over similar historical (average 1850-1859 to average [2000][2001][2002][2003][2004][2005][2006][2007][2008][2009] and recent (average 1960-1969 to average of 2000-2009) time periods. We characterize the biological and socioeconomic systems in these regions facing loss and damage from ocean acidification in the context of climate change and other stressors. Such analysis can inform societal consideration of carbon producer responsibility for current and near-term risks of further loss and damage to human communities dependent on marine ecosystems and fisheries vulnerable to ocean acidification.

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Pteropods on the edge: Cumulative effects of ocean acidification, warming, and deoxygenation

Cited by 93 publications

References 141 publications

Biogeochemical Anomalies at Two Southern California Current System Moorings During the 2014–2016 Warm Anomaly‐El Niño Sequence

Biogeochemical Anomalies at Two Southern California Current System Moorings During the 2014–2016 Warm Anomaly‐El Niño Sequence

El Niño-Related Thermal Stress Coupled With Upwelling-Related Ocean Acidification Negatively Impacts Cellular to Population-Level Responses in Pteropods Along the California Current System With Implications for Increased Bioenergetic Costs

Attributing ocean acidification to major carbon producers

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