High latitude fish in a high CO2 world: Synergistic effects of elevated temperature and carbon dioxide on the metabolic rates of Antarctic notothenioids

Enzor, Laura A.; Zippay, Mackenzie L.; Place, Sean P.

doi:10.1016/j.cbpa.2012.07.016

Cited by 75 publications

(104 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Increases in Ṗ CO2 are specifically hypothesized to exacerbate oxidative stress by directly affecting mitochondrial function (Murphy, 2009;Tomanek et al, 2011), and recent studies have indeed shown that hypercapnia can negatively affect mitochondrial capacities in Antarctic fish (Strobel et al, 2012;Strobel et al, 2013b). We found that oxidative damage was most apparent within the first 7 days of acclimation to the treatment conditions, which coincides with a spike in the resting metabolic rate (RMR) of all three species under these same acclimation conditions (Enzor et al, 2013). However, after long-term acclimation, oxygen consumption rates began to decline across treatments in T. bernacchii and P. borchgrevinki (Enzor et al, 2013;A.E.…”

Section: Tissue-specific Changes In Antioxidant Capacitymentioning

confidence: 52%

“…We found that oxidative damage was most apparent within the first 7 days of acclimation to the treatment conditions, which coincides with a spike in the resting metabolic rate (RMR) of all three species under these same acclimation conditions (Enzor et al, 2013). However, after long-term acclimation, oxygen consumption rates began to decline across treatments in T. bernacchii and P. borchgrevinki (Enzor et al, 2013;A.E. and S.P.P., unpublished data), which also coincides with the observed changes in antioxidant activity and decrease in levels of protein damage reported in this study.…”

Section: Tissue-specific Changes In Antioxidant Capacitymentioning

confidence: 78%

“…We have previously shown that increased temperature and Ṗ CO 2 levels result in a rapid increase in resting metabolic rates in several species of Antarctic fish (Enzor et al, 2013). This rapid increase in respiration has the potential to negatively impact the organism through elevated production of ROS (Lesser, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Despite projections that indicate changes in SST and partial pressure of CO 2 (Ṗ CO2 ) in seawater will impact higher latitudes faster and to a greater Is warmer better? Decreased oxidative damage in notothenioid fish after long-term acclimation to multiple stressors Laura A. Enzor and Sean P. Place* extent than temperate regions (Walther et al, 2002;Orr et al, 2005;Turner et al, 2005;McNeil and Matear, 2008;Fabry et al, 2008;Fabry et al, 2009;Halpern et al, 2008;McNeil et al, 2010;Mathis et al, 2011a;Mathis et al, 2011b), only a handful of studies have examined the effects of ecologically relevant increases in seawater Ṗ CO 2 on high latitude marine teleosts (Hurst et al, 2012;Strobel et al, 2012;Enzor et al, 2013;Strobel et al, 2013a;Strobel et al, 2013b). Similar to impacts seen with elevated temperature, ocean acidification may also perturb oxidative stress in marine teleosts (Murphy, 2009;Tomanek et al, 2011) and may even exacerbate the detrimental effects of reactive oxygen species at the cellular level (Ezraty et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the potential synergistic effects of increased temperature and increased Ṗ CO 2 in fish have only been examined in a small number of studies (Pankhurst and Munday, 2011;Nowicki et al, 2012;Strobel et al, 2012;Enzor et al, 2013;Strobel et al, 2013a;Strobel et al, 2013b;Gräns et al, 2014). We have previously shown that increased temperature and Ṗ CO 2 levels result in a rapid increase in resting metabolic rates in several species of Antarctic fish (Enzor et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Is warmer better? Decreased oxidative damage in notothenioid fish after long-term acclimation to multiple stressors

Enzor

Place

2014

Journal of Experimental Biology

Self Cite

View full text Add to dashboard Cite

Antarctic fish of the suborder Notothenioidei have evolved several unique adaptations to deal with subzero temperatures. However, these adaptations may come with physiological trade-offs, such as an increased susceptibility to oxidative damage. As such, the expected environmental perturbations brought on by global climate change have the potential to significantly increase the level of oxidative stress and cellular damage in these endemic fish. Previous single stressor studies of the notothenioids have shown they possess the capacity to acclimate to increased temperatures, but the cellularlevel effects remain largely unknown. Additionally, there is little information on the ability of Antarctic fish to respond to ecologically relevant environmental changes where multiple variables change concomitantly. We have examined the potential synergistic effects that increased temperature and Ṗ CO2 have on the level of protein damage in Trematomus bernacchii, Pagothenia borchgrevinki and Trematomus newnesi, and combined these measurements with changes in total enzymatic activity of catalase (CAT) and superoxide dismutase (SOD) in order to gauge tissue-specific changes in antioxidant capacity. Our findings indicate that total SOD and CAT activity levels displayed only small changes across treatments and tissues. Short-term acclimation to decreased seawater pH and increased temperature resulted in significant increases in oxidative damage. Surprisingly, despite no significant change in antioxidant capacity, cellular damage returned to near-basal levels, and significantly decreased in T. bernacchii, after long-term acclimation. Overall, these data suggest that notothenioid fish currently maintain the antioxidant capacity necessary to offset predicted future ocean conditions, but it remains unclear whether this capacity comes with physiological trade-offs.

show abstract

Section: Tissue-specific Changes In Antioxidant Capacitymentioning

confidence: 52%

Section: Tissue-specific Changes In Antioxidant Capacitymentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Is warmer better? Decreased oxidative damage in notothenioid fish after long-term acclimation to multiple stressors

Enzor

Place

2014

Journal of Experimental Biology

Self Cite

View full text Add to dashboard Cite

show abstract

Biodiversity and Climate Change in the Oceans

Booth

Poloczanska

Donelson

et al. 2017

Climate Change Impacts on Fisheries and Aquaculture

View full text Add to dashboard Cite

Effects of ocean acidification on Antarctic marine organisms: A meta‐analysis

Hancock

King

Stark

et al. 2020

Ecology and Evolution

View full text Add to dashboard Cite

Southern Ocean waters are among the most vulnerable to ocean acidification. The projected increase in the CO 2 level will cause changes in carbonate chemistry that are likely to be damaging to organisms inhabiting these waters. A meta-analysis was undertaken to examine the vulnerability of Antarctic marine biota occupying waters south of 60°S to ocean acidification. This meta-analysis showed that ocean acidification negatively affects autotrophic organisms, mainly phytoplankton, at CO 2 levels above 1,000 μatm and invertebrates above 1,500 μatm, but positively affects bacterial abundance. The sensitivity of phytoplankton to ocean acidification was influenced by the experimental procedure used. Natural, mixed communities were more sensitive than single species in culture and showed a decline in chlorophyll a concentration, productivity, and photosynthetic health, as well as a shift in community composition at CO 2 levels above 1,000 μatm. Invertebrates showed reduced fertilization rates and increased occurrence of larval abnormalities, as well as decreased calcification rates and increased shell dissolution with any increase in CO 2 level above 1,500 μatm. Assessment of the vulnerability of fish and macroalgae to ocean acidification was limited by the number of studies available. Overall, this analysis indicates that many marine organisms in the Southern Ocean are likely to be susceptible to ocean acidification and thereby likely to change their contribution to ecosystem services in the future. Further studies are required to address the poor spatial coverage, lack of community or ecosystem-level studies, and the largely unknown potential for organisms to acclimate and/or adapt to the changing conditions.

show abstract

High latitude fish in a high CO2 world: Synergistic effects of elevated temperature and carbon dioxide on the metabolic rates of Antarctic notothenioids

Cited by 75 publications

References 54 publications

Is warmer better? Decreased oxidative damage in notothenioid fish after long-term acclimation to multiple stressors

Is warmer better? Decreased oxidative damage in notothenioid fish after long-term acclimation to multiple stressors

Biodiversity and Climate Change in the Oceans

Effects of ocean acidification on Antarctic marine organisms: A meta‐analysis

Contact Info

Product

Resources

About