Impact of medium-term exposure to elevated pCO2 levels on the physiological energetics of the mussel Mytilus chilensis

Navarro, Jorge M.; Torres, Rodrigo; Acuña, Karin; Duarte, Cristián; Manríquez, Patricio H.; Lardies, Marco A.; Lagos, Nelson A.; Vargas, Cristian A.; Aguilera, Victor M.

doi:10.1016/j.chemosphere.2012.09.063

Cited by 148 publications

(95 citation statements)

References 51 publications

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“…As shown above, only 2 studies considering realistic pH scenarios (offset \-0.4 pH unit) reported on a decrease in SMR for shelled molluscs (Fernández-Reiriz et al 2011;Navarro et al 2013; see Fig. 4) while four experiments concluded on an increase in their SMR during exposure to elevated CO 2 (Lannig et al 2010;Cummings et al 2011;Parker et al 2012), suggesting an ability to at least partially compensate for the increased energy costs of acidosis (Wicks and Roberts 2012).…”

Section: Other Physiological Processesmentioning

confidence: 99%

Impacts of ocean acidification on marine shelled molluscs

et al. 2013

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Over the next century, elevated quantities of atmospheric CO 2 are expected to penetrate into the oceans, causing a reduction in pH (-0.3/-0.4 pH unit in the surface ocean) and in the concentration of carbonate ions (so-called ocean acidification). Of growing concern are the impacts that this will have on marine and estuarine organisms and ecosystems. Marine shelled molluscs, which colonized a large latitudinal gradient and can be found from intertidal to deep-sea habitats, are economically and ecologically important species providing essential ecosystem services including habitat structure for benthic organisms, water purification and a food source for other organisms. The effects of ocean acidification on the growth and shell production by juvenile and adult shelled molluscs are variable among species and even within the same species, precluding the drawing of a general picture. This is, however, not the case for pteropods, with all species tested so far, being negatively impacted by ocean acidification. The blood of shelled molluscs may exhibit lower pH with consequences for several physiological processes (e.g. respiration, excretion, etc.) and, in some cases, increased mortality in the long term. While fertilization may remain unaffected by elevated pCO 2 , embryonic and larval development will be highly sensitive with important reductions in size and decreased survival of larvae, increases in the number of abnormal larvae and an increase in the developmental time. There are big gaps in the current understanding of the biological consequences of an Communicated by S. Dupont.Frédéric Gazeau and Laura M. Parker have contributed equally to this work.Electronic supplementary material The online version of this article

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Section: Other Physiological Processesmentioning

confidence: 99%

Impacts of ocean acidification on marine shelled molluscs

et al. 2013

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“…The importance of grazers to control epiphytes growth in aquaria has been shown by Jokiel et al (2008). In mollusks and urchins, several studies have demonstrated a link between feeding rates and other metabolic processes, such as respiration, calcification, and excretion (Carr and Bruno, 2013;Navarro et al, 2013;Noisette et al, 2016). In mollusks, a wide range of responses to ocean acidification and warming have been revealed Parker et al, 2013).…”

Section: Net Production Gross Productionmentioning

confidence: 99%

Species interactions can shift the response of a maerl bed community to ocean acidification and warming

et al. 2017

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Abstract. Predicted ocean acidification and warming are likely to have major implications for marine organisms, especially marine calcifiers. However, little information is available on the response of marine benthic communities as a whole to predicted changes. Here, we experimentally examined the combined effects of temperature and partial pressure of carbon dioxide (pCO 2 ) increases on the response of maerl bed assemblages, composed of living and dead thalli of the free-living coralline alga Lithothamnion corallioides, epiphytic fleshy algae, and grazer species. Two 3-month experiments were performed in the winter and summer seasons in mesocosms with four different combinations of pCO 2 (ambient and high pCO 2 ) and temperature (ambient and +3 • C). The response of maerl assemblages was assessed using metabolic measurements at the species and assemblage scales. This study suggests that seasonal variability represents an important driver influencing the magnitude and the direction of species and community response to climate change. Gross primary production and respiration of assemblages was enhanced by high pCO 2 conditions in the summer. This positive effect was attributed to the increase in epiphyte biomass, which benefited from higher CO 2 concentrations for growth and primary production. Conversely, high pCO 2 drastically decreased the calcification rates in assemblages. This response can be attributed to the decline in calcification rates of living L. corallioides due to acidification and increased dissolution of dead L. corallioides. Future changes in pCO 2 and temperature are likely to promote the development of non-calcifying algae to the detriment of the engineer species L. corallioides. The development of fleshy algae may be modulated by the ability of grazers to regulate epiphyte growth. However, our results suggest that predicted changes will negatively affect the metabolism of grazers and potentially their ability to control epiphyte abundance. We show here that the effects of pCO 2 and temperature on maerl bed communities were weakened when these factors were combined. This underlines the importance of examining multifactorial approaches and community-level processes, which integrate species interactions, to better understand the impact of global change on marine ecosystems.

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“…Previous studies have shown that the life of calcifying groups may be compromised due to OA (Orr et al 2005;Li and Gao 2012;Movilla et al 2012;Navarro et al 2013). It has been demonstrated that adult sea urchins are able to minimize the acidification effect on their skeleton by increasing the concentration of bicarbonate within their perivisceral coelomic fluid and preventing their loss throughout the intestine (Holtmann et al 2013;Stumpp et al 2012b).…”

Section: Introductionmentioning

confidence: 99%

CO2-induced fertilization impairment in Strongylocentrotus droebachiensis collected in the Arctic

2014

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Fertilization depends on distribution and aggregation patterns of sea urchins which influence gamete contact time and may potentially enhance their vulnerability to ocean acidification. In this study, we conducted fertilization experiments to assess the effects of selected pH scenarios on fertilization success of Strongylocentrotus droebachiensis, from Spitsbergen, Arctic. Acidification was achieved by aerating seawater with different CO 2 partial pressures to represent preindustrial and present conditions (measured *180-425 latm) and future acidification scenarios (*550-800, *1,300, *2,000 latm). Fertilization success was defined as the proportion of successful/unsuccessful fertilizations per treatment; eggs were classified according to features of their fertilization envelope (FE), hyaline layer (HL) and achievement of cellular division. The diagnostic findings of specific pathological aberrations were described in detail. We additionally measured intracellular pH changes in unfertilized eggs exposed for 1 h to selected acidification treatments using BCECF/AM. We conclude that (a) acidified conditions increase the proportion of eggs that failed fertilization, (b) acidification may increase the risk of polyspermy due to failures in the FE formation supported by the occasional observation of multiple sperms in the perivitelline space and (c) irregular formation of the embryo may arise due to impaired formation of the HL. The decrease in fertilization success could be also related to the observed changes in intracellular pH at pCO 2 * 1,000 latm or higher.

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Impact of medium-term exposure to elevated pCO2 levels on the physiological energetics of the mussel Mytilus chilensis

Cited by 148 publications

References 51 publications

Impacts of ocean acidification on marine shelled molluscs

Impacts of ocean acidification on marine shelled molluscs

Species interactions can shift the response of a maerl bed community to ocean acidification and warming

CO2-induced fertilization impairment in Strongylocentrotus droebachiensis collected in the Arctic

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