Moderate acidification affects growth but not survival of 6-month-old oysters

Amaral, Valter; Cabral, Henrique N.; Bishop, Melanie J.

doi:10.1007/s10452-011-9385-5

Cited by 23 publications

(21 citation statements)

References 32 publications

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“…In some cases, estuaries are also subject to increased acid loading from acid sulphate soils (ASS). Recently, Amaral et al (2012) have reported on the impacts of a 70-day transplantation experiment to decreased pH levels (-0.8 to -1.9 pH unit) on 6-month-old oysters (Saccostrea glomerata). These juveniles appeared very resistant, as survival was not impacted by the extremely low pH levels.…”

Section: Field Studiesmentioning

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: Field Studiesmentioning

confidence: 99%

Impacts of ocean acidification on marine shelled molluscs

et al. 2013

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“…Several studies tried to understand how marine carbonateshelled animals respond to ocean acidification, such as brachiopods (McClintock et al, 2009;Cross et al, 2015Cross et al, , 2016Cross et al, , 2018Jurikova et al, 2019), bivalves (e.g. Berge et al, 2006;McClintock et al, 2009;Beniash et al, 2010;Parker et al, 2010;Melzner et al, 2011;Talmage and Gobler, 2011;Amaral et al, 2012;Hiebenthal et al, 2013;Coleman et al, 2014;Gobler et al, 2014;Milano et al, 2016), cold-water scleractinian corals (e.g. Form and Riebesell, 2011;McCulloch et al, 2012;Jantzen et al, 2013b;Büscher et al, 2017) and sea urchins (Suckling et al, 2015) (Table S1).…”

Section: Low Ph and Brachiopod Microstructurementioning

confidence: 99%

Variation in brachiopod microstructure and isotope geochemistry under low-pH–ocean acidification conditions

Jurikova

Angiolini

et al. 2019

Biogeosciences

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Abstract. In the last few decades and in the near future CO2-induced ocean acidification is potentially a big threat to marine calcite-shelled animals (e.g. brachiopods, bivalves, corals and gastropods). Despite the great number of studies focusing on the effects of acidification on shell growth, metabolism, shell dissolution and shell repair, the consequences for biomineral formation remain poorly understood. Only a few studies have addressed the impact of ocean acidification on shell microstructure and geochemistry. In this study, a detailed microstructure and stable isotope geochemistry investigation was performed on nine adult brachiopod specimens of Magellania venosa (Dixon, 1789). These were grown in the natural environment as well as in controlled culturing experiments under different pH conditions (ranging from 7.35 to 8.15±0.05) over different time intervals (214 to 335 days). Details of shell microstructural features, such as thickness of the primary layer, density and size of endopunctae and morphology of the basic structural unit of the secondary layer were analysed using scanning electron microscopy. Stable isotope compositions (δ13C and δ18O) were tested from the secondary shell layer along shell ontogenetic increments in both dorsal and ventral valves. Based on our comprehensive dataset, we observed that, under low-pH conditions, M. venosa produced a more organic-rich shell with higher density of and larger endopunctae, and smaller secondary layer fibres. Also, increasingly negative δ13C and δ18O values are recorded by the shell produced during culturing and are related to the CO2 source in the culture set-up. Both the microstructural changes and the stable isotope results are similar to observations on brachiopods from the fossil record and strongly support the value of brachiopods as robust archives of proxies for studying ocean acidification events in the geologic past.

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“…Over the past 10 years, accumulating evidence suggests that OA could result in delayed embryonic development [8,9], decreased larval growth [10,11] and increased mortality [12] of many marine mollusks. Moreover, OA stress has also been found to affect many physiological processes, such as calcification [13], energy metabolism [14] and behavior [15,16] of calcifying organisms.…”

Section: Introductionmentioning

confidence: 99%

Effects of ocean acidification on immune responses of the Pacific oyster Crassostrea gigas

Wang

Cao

Ning

et al. 2016

Fish & Shellfish Immunology

130

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a b s t r a c tOcean acidification (OA), caused by anthropogenic CO 2 emissions, has been proposed as one of the greatest threats in marine ecosystems. A growing body of evidence shows that ocean acidification can impact development, survival, growth and physiology of marine calcifiers. In this study, the immune responses of the Pacific oyster Crassostrea gigas were investigated after elevated pCO 2 exposure for 28 days. The results demonstrated that OA caused an increase of apoptosis and reactive oxygen species (ROS) production in hemocytes. Moreover, elevated pCO 2 had an inhibitory effect on some antioxidant enzyme activities and decreased the GSH level in digestive gland. However, the mRNA expression pattern of several immune related genes varied depending on the exposure time and tissues. After exposure to pCO 2 at~2000 ppm for 28 days, the mRNA expressions of almost all tested genes were significantly suppressed in gills and stimulated in hemocytes. Above all, our study demonstrated that elevated pCO 2 have a significant impact on the immune systems of the Pacific oyster, which may constitute as a potential threat to increased susceptibility of bivalves to diseases.

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Moderate acidification affects growth but not survival of 6-month-old oysters

Cited by 23 publications

References 32 publications

Impacts of ocean acidification on marine shelled molluscs

Impacts of ocean acidification on marine shelled molluscs

Variation in brachiopod microstructure and isotope geochemistry under low-pH–ocean acidification conditions

Effects of ocean acidification on immune responses of the Pacific oyster Crassostrea gigas

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