Fluctuating seawater pCO2/pH induces opposing interactions with copper toxicity for two intertidal invertebrates

Wilson-McNeal, Alice; Hird, Cameron; Hobbs, Catherine; Nielson, Clara; Smith, Kathryn E.; Wilson, Rod W.; Lewis, Ceri

doi:10.1016/j.scitotenv.2020.141370

Cited by 13 publications

(3 citation statements)

References 62 publications

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“…The continuous dissolution of atmospheric CO 2 also could drive changes in lake water pH, altering the response of aquatic species to pH-sensitive pollutants [7,61]. In agreement with the results obtained in this investigation, a notable inverse relationship between pCO 2 /f CO 2 and pH (Table S3) was observed, indicating a critical pH threshold where a shift occurred from CO 2 absorption capacity to emission sources.…”

Section: Environmental Factors Affecting the Lake Pco 2 And Fcosupporting

confidence: 88%

Significant Daily CO2 Source–Sink Interchange in an Urbanizing Lake in Southwest China

Yang,

Chen,

et al. 2023

Water

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Inland lake water–air interfaces, particularly the partial pressure of CO2 (pCO2), have become key parameters in the study of global carbon cycle changes. However, there are few studies on short-term daily variations in pCO2 in urbanizing lakes. The fluctuations in pCO2 and CO2 fluxes (fCO2) were monitored biweekly on-site for pCO2 assessments during daytime hours (7:00–17:00 CST) from January to September 2020 in an urbanizing lake located in Southwest China. We found a pronounced and uninterrupted decline in the average levels of pCO2 and fCO2 from 7:00 to 17:00 CST. Notably, the mornings (7:00–12:00 CST) exhibited substantially elevated pCO2 and fCO2 values compared to the afternoons. Specifically, compared to 7:00, the mean pCO2 and fCO2 at 17:00 CST decreased by ca. 74% and 112%, respectively. The average daytime pCO2 was 707 ± 642 μatm, significantly higher than the typical atmospheric CO2 levels of 380–420 μatm, while the average pCO2 on 9 January, 1 April, and 27 July was lower than typical atmospheric CO2. Each month, all water environmental parameters showed significant differences. pCO2 and fCO2 reached maximums in September; water temperature and turbidity significantly increased; and pH, dissolved oxygen and transparency markedly decreased. Additionally, the correlation between pCO2 and environmental factors demonstrated that the nutrient levels, dissolved oxygen, pH, and transparency/turbidity had significant roles in CO2 dynamics in this lake. Therefore, this urbanizing lake could serve as a CO2 source and sink during the daytime.

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Section: Environmental Factors Affecting the Lake Pco 2 And Fcosupporting

confidence: 88%

Significant Daily CO2 Source–Sink Interchange in an Urbanizing Lake in Southwest China

Yang,

Chen,

et al. 2023

Water

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“…In this view, the application of other omic analyses might improve the outcomes of this research. Another explanation for the differences is likely due to the fact that the response to OA stress is known to be species-specific (Wilson-McNeal et al, 2020), thus it is possible that different organisms, such as sea urchins, show a different mechanism of tolerance to OA.…”

Section: B Amentioning

confidence: 99%

Investigation of the molecular mechanisms which contribute to the survival of the polychaete Platynereis spp. under ocean acidification conditions in the CO2 vent system of Ischia Island (Italy)

et al. 2023

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The continuous increase of CO2 emissions in the atmosphere due to anthropogenic activities is one of the most important factors that contribute to Climate Change and generates the phenomenon known as Ocean Acidification (OA). Research conducted at the CO2 vents of Castello Aragonese (Ischia, Italy), which represents a natural laboratory for the study of OA, demonstrated that some organisms, such as polychaetes, thrive under acidified conditions through different adaptation mechanisms. Some functional and ecological traits promoting tolerance to acidification in these organisms have been identified, while the molecular and physiological mechanisms underlying acclimatisation or genetic adaptation are still largely unknown. Therefore, in this study we investigated epigenetic traits, as histone acetylation and methylation, in Platynereis spp. individuals coming from the Castello vent, and from a nearby control site, in two different periods of the year (November-June). Untargeted metabolomics analysis was also carried out in specimens from the two sites. We found a different profile of acetylation of H2B histone in the control site compared to the vent as a function of the sampling period. Metabolomic analysis showed clear separation in the pattern of metabolites in polychaetes from the control site with respect to those from the Castello vent. Specifically, a significant reduction of lipid/sterols and nucleosides was measured in polychaetes from the vent. Overall results contribute to better understand the potential metabolic pathways involved in the tolerance to OA.

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“…According to Alava et al (2018) interactions between climate change (e.g., temperature increases, pH decreases, or pCO 2 increases) and pollutants may be either climate change dominant, where the climate stressor leads to enhanced susceptibility of biota to chemical toxicity, or contaminant dominant, where chemical exposure leads to an increase in climate stressor susceptibility. Ocean acidification has also been shown to alter bioaccumulation rates of contaminants (Braune et al, 2014;Shi et al, 2016;Alava et al, 2018) and lead to antagonistic, additive or synergistic interactions with other pollutants (Pascal et al, 2010;Benedetti et al, 2016;Lewis et al, 2016;Wilson-McNeal et al, 2020). Another mechanism by which plastic pollution and ocean acidification may interact in their toxicity is via variations in seawater pH modifying the chemical equilibrium of plastics.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Combined Ocean Acidification and Nanoplastic Exposures on the Embryonic Development of Antarctic Krill

et al. 2021

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In aquatic environments, plastic pollution occurs concomitantly with anthropogenic climate stressors such as ocean acidification. Within the Southern Ocean, Antarctic krill (Euphausia Superba) support many marine predators and play a key role in the biogeochemical cycle. Ocean acidification and plastic pollution have been acknowledged to hinder Antarctic krill development and physiology in singularity, however potential multi-stressor effects of plastic particulates coupled with ocean acidification are unexplored. Furthermore, Antarctic krill may be especially vulnerable to plastic pollution due to their close association with sea-ice, a known plastic sink. Here, we investigate the behaviour of nanoplastic [spherical, aminated (NH2), and yellow-green fluorescent polystyrene nanoparticles] in Antarctic seawater and explore the single and combined effects of nanoplastic (160 nm radius, at a concentration of 2.5 μg ml–1) and ocean acidification (pCO2 ∼900, pHT 7.7) on the embryonic development of Antarctic krill. Gravid female krill were collected in the Atlantic sector of the Southern Ocean (North Scotia Sea). Produced eggs were incubated at 0.5 °C in four treatments (control, nanoplastic, ocean acidification and the multi-stressor scenario of nanoplastic presence, and ocean acidification) and their embryonic development after 6 days, at the incubation endpoint, was determined. We observed that negatively charged nanoplastic particles suspended in seawater from the Scotia Sea aggregated to sizes exceeding the nanoscale after 24 h (1054.13 ± 53.49 nm). Further, we found that the proportion of embryos developing through the early stages to reach at least the limb bud stage was highest in the control treatment (21.84%) and lowest in the multi-stressor treatment (13.17%). Since the biological thresholds to any stressors can be altered by the presence of additional stressors, we propose that future nanoplastic ecotoxicology studies should consider the changing global ocean under future climate scenarios for assessments of their impact and highlight that determining the behaviour of nanoplastic particles used in incubation studies is critical to determining their toxicity.

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Fluctuating seawater pCO2/pH induces opposing interactions with copper toxicity for two intertidal invertebrates

Cited by 13 publications

References 62 publications

Significant Daily CO2 Source–Sink Interchange in an Urbanizing Lake in Southwest China

Significant Daily CO2 Source–Sink Interchange in an Urbanizing Lake in Southwest China

Investigation of the molecular mechanisms which contribute to the survival of the polychaete Platynereis spp. under ocean acidification conditions in the CO2 vent system of Ischia Island (Italy)

The Effects of Combined Ocean Acidification and Nanoplastic Exposures on the Embryonic Development of Antarctic Krill

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