CO2-driven ocean acidification reduces larval feeding efficiency and changes food selectivity in the mollusk Concholepas concholepas

Vargas, Cristian A.; Hoz, M. De La; Aguilera, Victor M.; Martín, Valeska San; Manríquez, Patricio H.; Navarro, Jorge M.; Torres, Rodrigo; Lardies, Marco A.; Lagos, Nelson A.

doi:10.1093/plankt/fbt045

Cited by 62 publications

(38 citation statements)

References 44 publications

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“…The concentration of algae was monitored in the experiments to assure food was kept at ad libitum levels, so the stress induced by higher temperatures must have disturbed the feeding performance of the larvae. Likewise, the existence of malnourished larvae at the most acidic pH (7.5) suggests that pH may affect feeding, as previously reported in the gastropod Concholepas concholepas 66 . An inability to feed effectively will negatively impact metabolic functions that may ultimately result in decreased survival 67 .…”

Section: Effects Of Oa-w On T Reticulata Larval Development and Survsupporting

confidence: 68%

Vulnerability of Tritia reticulata (L.) early life stages to ocean acidification and warming

Oliveira

Freitas

Fonseca

et al. 2020

Sci Rep

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Ocean acidification and warming (OA-W) result mainly from the absorption of carbon dioxide and heat by the oceans, altering its physical and chemical properties and affecting carbonate secretion by marine calcifiers such as gastropods. These processes are ongoing, and the projections of their aggravation are not encouraging. This work assesses the concomitant effect of the predicted pH decrease and temperature rise on early life stages of the neogastropod Tritia reticulata (L.), a common scavenger of high ecological importance on coastal ecosystems of the NE Atlantic. Veligers were exposed for 14 days to 12 OA-W experimental scenarios generated by a factorial design of three pH levels (targeting 8.1, 7.8 and 7.5) at four temperatures (16, 18, 20 and 22 °C). Results reveal effects of both pH and temperature (T °C) on larval development, growth, shell integrity and survival, individually or interactively at different exposure times. All endpoints were initially driven by pH, with impaired development and high mortalities being recorded in the first week, constrained by the most acidic scenarios (pH target 7.5). Development was also significantly driven by T °C, and its acceleration with warming was observed for the remaining exposure time. Still, by the end of this 2-weeks trial, larval performance and survival were highly affected by the interaction between pH and T °C: growth under warming was evident but only for T °C ≤ 20 °C and carbonate saturation (pH target ≥ 7.8). In fact, carbonate undersaturation rendered critical larval mortality (100%) at 22 °C, and the occurrence of extremely vulnerable, unshelled specimens in all other tested temperatures. As recruitment cohorts are the foundation for future populations, our results point towards the extreme vulnerability of this species in case tested scenarios become effective that, according to the IPCC, are projected for the northern hemisphere, where this species is ubiquitous, by the end of the century. Increased veliger mortality associated with reduced growth rates, shell dissolution and loss under OA-W projected scenarios will reduce larval performance, jeopardizing T. reticulata subsistence.The netted whelk, Tritia reticulata (Linnaeus, 1758) is a common neogastropod, ubiquitous in the North East Atlantic shore -along the European coastline, from the Canaries to Norway-and throughout the Mediterranean, Baltic and the Black Seas 1 . Its occurrence extends from the low water of spring tides to sublittoral depths down to at least 40 m, along the open coast and the outer parts of estuaries. Adults spawn from mid-winter to summer, laying egg capsules onto hard substrates 2,3 . Inside the capsule, organisms pass through a trochophore larval stage before hatching as veliger, roughly after one month of development 1,3 . The veliger stage corresponds to the free-swimming, planktonic larval period, and is anatomically characterized by the presence of a shell, foot and velum. Depending mainly on the temperature, this stage may last between 1 to 3 months as larvae reach...

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Section: Effects Of Oa-w On T Reticulata Larval Development and Survsupporting

confidence: 68%

Vulnerability of Tritia reticulata (L.) early life stages to ocean acidification and warming

Oliveira

Freitas

Fonseca

et al. 2020

Sci Rep

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“…Therefore, the flux of riverine corrosive waters might have significant implications for marine calcifiers inhabiting river‐influenced coastal sites. Low Ω aragonite has been demonstrated to impact negatively the calcification and growth of the Chilean mussel Mytilus chilensis [ Duarte et al, ] and the larval ingestion rate of the Chilean gastropod Concholepas concholepas [ Vargas et al, ]. Moreover, Aguilera et al [] have shown that low‐pH freshwater discharge might impair the reproductive outcome in the neritic copepod Acartina tonsa in Southern Chile.…”

Section: Discussionmentioning

confidence: 99%

Influences of riverine and upwelling waters on the coastal carbonate system off Central Chile and their ocean acidification implications

et al. 2016

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A combined data set, combining data from field campaigns and oceanographic cruises, was used to ascertain the influence of both river discharges and upwelling processes, covering spatial and temporal variation in dissolved inorganic carbon (DIC) and aragonite saturation state. This work was conducted in one of the most productive river-influenced upwelling areas in the South Pacific coasts (36°S). Additionally, further work was also conducted to ascertain the contribution of different DIC sources, influencing the dynamics of DIC along the land-ocean range. Six sampling campaigns were conducted across seven stations at the Biobío River basin, covering approximately 200 km. Three research cruises were undertaken simultaneously, covering the adjacent continental shelf, including 12 sampling stations for hydrographic measurements. Additionally, six stations were also sampled for chemical analyses, covering summer, winter, and spring conditions over 2010 and 2011. Our results evidenced that seaward extent of the river plume was more evident during the winter field campaign, when highest riverine DIC fluxes were observed. The carbonate system along the river-ocean continuum was very heterogeneous varying over spatial and temporal scales. High DIC and pCO 2 were observed in river areas with larger anthropogenic effects. CO 2 supersaturation at the river plume was observed during all campaigns due to the influence of low pH river waters in winter/spring and high-pCO 2 upwelling waters in summer. δ 13 C DIC evidenced that main DIC sources along the river and river plume corresponded to the respiration of terrestrial organic matter. We have linked this natural process to the carbonate saturation on the adjacent river-influenced coastal area, suggesting that Ω aragonite undersaturation in surface/subsurface waters is largely modulated by the influence of both river discharge and coastal upwelling events in this productive coastal area. Conditions of low Ω aragonite might impact negatively physiological traits for marine organisms, such as bivalves, gastropods, and crustaceans. Therefore, local populations from river-influenced sites could be inherently more tolerant to ocean acidification than organisms living in regions with lower Ω aragonite variability. VARGAS ET AL.

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“…While ocean acidification appears to have varying and in some cases no effect on metabolism (Bibby et al, 2007;Marchant et al, 2010;Melatunan et al, 2011;Wood et al, 2011;Catarino et al, 2012;McElroy et al, 2012;Manríquez et al, 2013;Matoo et al, 2013;Schalkhausser et al, 2013Schalkhausser et al, , 2014Zhang et al, 2014), a range of other important effects in molluscs, both physiological (reviewed by Parker et al, 2013;Kroeker et al, 2014) and behavioural (e.g. Vargas et al, 2013;Spady et al, 2014;Watson et al, 2014), have been described. Importantly and directly related to the current study, we recently found that exposure to elevated CO 2 significantly reduced the number of individuals that jump in response to cone snail odour, while not affecting the jumping performance or aerobic capacity of snails that 'decided' to jump .…”

Section: Effects Of Ocean Acidificationmentioning

confidence: 99%

Will jumping snails prevail? Influence of near-future CO2, temperature and hypoxia on respiratory performance in the tropical conchGibberulus gibberulus gibbosus

Lefevre

Watson

Munday

et al. 2015

Journal of Experimental Biology

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Tropical coral reef organisms are predicted to be especially sensitive to ocean warming because many already live close to their upper thermal limit, and the expected rise in ocean CO 2 is proposed to further reduce thermal tolerance. Little, however, is known about the thermal sensitivity of a diverse and abundant group of reef animals, the gastropods. The humpbacked conch (Gibberulus gibberulus gibbosus), inhabiting subtidal zones of the Great Barrier Reef, was chosen as a model because vigorous jumping, causing increased oxygen uptake (Ṁ O2 ), can be induced by exposure to odour from a predatory cone snail (Conus marmoreus). We investigated the effect of present-day ambient (417-454 µatm) and projected-future (955-987 µatm) P CO2 on resting (Ṁ O2,rest ) and maximum (Ṁ O2,max ) Ṁ O2 , as well as Ṁ O2 during hypoxia and critical oxygen tension (P O2,crit ), in snails kept at present-day ambient (28°C) or projectedfuture temperature (33°C). Ṁ O2,rest and Ṁ O2,max were measured both at the acclimation temperature and during an acute 5°C increase. Jumping caused a 4-to 6-fold increase in Ṁ O2 , and Ṁ O2,max increased with temperature so that absolute aerobic scope was maintained even at 38°C, although factorial scope was reduced. The humpbacked conch has a high hypoxia tolerance with a P O2,crit of 2.5 kPa at 28°C and 3.5 kPa at 33°C. There was no effect of elevated CO 2 on respiratory performance at any temperature. Long-term temperature records and our field measurements suggest that habitat temperature rarely exceeds 32.6°C during the summer, indicating that these snails have aerobic capacity in excess of current and future needs.

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CO2-driven ocean acidification reduces larval feeding efficiency and changes food selectivity in the mollusk Concholepas concholepas

Cited by 62 publications

References 44 publications

Vulnerability of Tritia reticulata (L.) early life stages to ocean acidification and warming

Vulnerability of Tritia reticulata (L.) early life stages to ocean acidification and warming

Influences of riverine and upwelling waters on the coastal carbonate system off Central Chile and their ocean acidification implications

Will jumping snails prevail? Influence of near-future CO2, temperature and hypoxia on respiratory performance in the tropical conchGibberulus gibberulus gibbosus

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