Calcification, growth and mortality of juvenile clams Ruditapes decussatus under increased pCO2 and reduced pH: Variable responses to ocean acidification at local scales?

Range, Pedro; Chı́charo, Maria Alexandra; Ben-Hamadou, Radhouan; Piló, David; Matias, Domitília; Joaquim, Sandra; Oliveira, A. P.; Chı́charo, Luis

doi:10.1016/j.jembe.2010.10.020

Cited by 103 publications

(62 citation statements)

References 44 publications

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“…However, he used seawater acidified with sulphuric acid and pH reductions that exceed all current predictions for ocean acidification, which limits the comparability and relevance of his results. Although non-significant differences in net calcification and growth rates were obtained by Range et al (2011) with our experimental design, note that they did not differentiate between size classes.According to Langenbuch & Pörtner (2002), ammonia excretion rates cannot be seen independently of the respective rates of oxygen consumption and energy turnover, which are reduced during metabolic depression, because less protein or amino acids are being catabolized. Berge et al (2006) reported growth reduction in acidified seawater and concluded that this is probably related to metabolic suppression, which has also been suggested to be an important biological impact caused by ocean storage of CO 2 (Seibel & Walsh 2003).…”

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confidence: 62%

“…Total alkalinity (TA) was determined twice during the acclimation period, on 20 July and 23 September 2009, by automatic titration with HCl past the endpoint of 4.5. Dissolved inorganic carbon (DIC), partial pressure of CO 2 in seawater (pCO 2 ) and the CaCO 3 saturation state for calcite (Ωcal) and aragonite (Ωara) were calculated from in situ temperature and corrected pH and TA, following the procedures described by Range et al (2011).Physiological experiments. The feeding behaviour and metabolic activity of Ruditapes decussatus were determined at the beginning of the acclimation period (Day 2), under natural pH conditions and after 87 d of acclimation at each of the 3 levels of pH considered (ΔpH= 0.0; ΔpH= −0.4; and ΔpH= −0.7 units).…”

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confidence: 99%

“…The elevated pCO 2 and pH of the pumped water was maintained by its extremely high TA, which kept Ωcal and Ωara above the 100% saturation threshold in the 3 treatments (Table 1). For more details, see Range et al (2011). …”

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Physiological energetics of juvenile clams Ruditapes decussatus in a high CO<sub>2 coastal ocean

Fernández‐Reiriz

Range²,

Álvarez‐Salgado³

et al. 2011

Mar. Ecol. Prog. Ser.

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Effects of coastal ocean acidification, other than calcification, were tested on juvenile clams Ruditapes decussatus during a controlled CO 2 perturbation experiment. The carbonate chemistry of natural (control) seawater was manipulated by injecting CO 2 to attain 2 reduced pH levels (-0.4 and -0.7 pH units) as compared with the control seawater. After 87 d of exposure, we found that the acidification conditions tested in this experiment significantly reduced the clearance, ingestion and respiration rates, and increased the ammonia excretion rate of R. decussatus seeds. Reduced ingestion combined with increased excretion is generally associated with a reduced energy input, which will likely contribute to a slower growth of the clams in a future high CO 2 coastal ocean. These results emphasize the need for management policies to mitigate the adverse effects of global change on aquaculture, which is an economically relevant activity in most coastal areas worldwide. KEY WORDS: Ocean acidification · Sea water pH · Physiological energetics · Clams · Ruditapes decussatus Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 433: [97][98][99][100][101][102][103][104][105] 2011 oxygen, pH and carbonate ion levels in temperate coastal waters are usually minimal during summer, when the biogenic materials produced during the preceding phytoplankton spring bloom have decomposed and many species of bivalves are spawning (Amaral 2009). In the particular case of the Iberian upwelling system (SW Europe), a significant reduction of the intensity and extension of the upwelling-favourable season has been observed over the last 50 yr (Lemos & Sansó 2006), which has produced a duplication of the residence time of water in the Galician rias, a group of large coastal embayments of the northern coast (Álvarez-Salgado et al. 2008), and a concomitant enhancement of mineralization (Pérez et al. 2010).Previous studies have shown that reductions in pH and in the concentration of carbonate ion in oceanic and coastal waters can have a negative effect on marine organisms (Fabry et al. 2008), eventually affecting their survival (Raven et al. 2005). However, a recent review by Hendriks et al. (2010) proposed that marine biota may be more resistant to acidification than expected. Most of the research efforts on this issue have been focused on the exploitable marine calcifiers with a special emphasis on the impact of ocean acidification on calcification rates (Orr et al. 2005, Gazeau et al. 2007, McDonald et al. 2009, Miller et al. 2009). For the particular case of marine bivalves, Michaelidis et al. (2005) and Berge et al. (2006) reported reduced growth rates for Mytilus spp. reared under conditions of increased CO 2 and reduced pH. Furthermore, Michaelidis et al. (2005) also showed that a prolonged reduction of seawater pH produces decreased respiration rates, increased protein degradation and acidosis of the haemolymph, which is buffered by the dissolution of the CaCO 3 shell. More rece...

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confidence: 62%

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confidence: 99%

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Physiological energetics of juvenile clams Ruditapes decussatus in a high CO<sub>2 coastal ocean

Fernández‐Reiriz

Range²,

Álvarez‐Salgado³

et al. 2011

Mar. Ecol. Prog. Ser.

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“…Since the great majority of these studies have been conducted under corrosive conditions with respect to aragonite (and sometimes calcite, see supplementary Table), these undersaturated conditions might be responsible for the observed effects on shell growth rates. In high-alkalinity-level areas such as in the studies of Range et al (2011Range et al ( , 2012, even a pH decrease of -0.7 pH unit did not lead to significant decreases in shell growth, sea water still being above the saturation level with respect to aragonite. The mechanisms setting the rate of net calcification (gross calcification minus dissolution) still remain to be explored.…”

Section: Calcification and Shell Growthmentioning

confidence: 90%

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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“…In rare instances there have been positive instead of negative impacts of elevated CO 2 . For example, there was no effect on calcification rates, size or weight in juveniles of the grooved carpet clam Ruditapes decussates raised at pCO 2 of 1694 and 4245 ppm (pH 7.84 and 7.46 respectively), but mortality was reduced in acidified treatment (pH 7.46), possibly due to delayed reproductive development of clams preventing spawning in acidified treatments [69] as an energy saving survival strategy. Also in contrast to the other molluscs with mainly planktotrophic larvae, the lecithotrophic juvenile European cuttlefish, Sepia officinalis, which hypercalcify, similar to some teleost fish and decapod crustaceans, showed no adverse growth or developmental effects with significantly more CaCO 3 accreted into cuttlebones [70] and eggs increased in weight [71] when raised at elevated pCO 2 .…”

Section: Molluscsmentioning

confidence: 95%

The Impact of Ocean Acidification on Reproduction, Early Development and Settlement of Marine Organisms

Ross

Parker

O’Connor³

et al. 2011

Water

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Predicting the impact of warming and acidifying on oceans on the early development life history stages of invertebrates although difficult, is essential in order to anticipate the severity and consequences of future climate change. This review summarises the current literature and meta-analyses on the early life-history stages of invertebrates including fertilisation, larval development and the implications for dispersal and settlement of populations. Although fertilisation appears robust to near future predictions of ocean acidification, larval development is much more vulnerable and across invertebrate groups, evidence indicates that the impacts may be severe. This is especially for those many marine organisms which start to calcify in their larval and/or juvenile stages. Species-specificity and variability in responses and current gaps in the literature are highlighted, including the need for studies to investigate the total effects of climate change including the synergistic impact of temperature, and the need for long-term multigenerational experiments to determine whether vulnerable invertebrate species have the capacity to adapt to elevations in atmospheric CO 2 over the next century.

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Calcification, growth and mortality of juvenile clams Ruditapes decussatus under increased pCO2 and reduced pH: Variable responses to ocean acidification at local scales?

Cited by 103 publications

References 44 publications

Physiological energetics of juvenile clams Ruditapes decussatus in a high CO<sub>2 coastal ocean

Physiological energetics of juvenile clams Ruditapes decussatus in a high CO<sub>2 coastal ocean

Impacts of ocean acidification on marine shelled molluscs

The Impact of Ocean Acidification on Reproduction, Early Development and Settlement of Marine Organisms

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