Low and variable pH decreases recruitment efficiency in populations of a temperate coral naturally present at a CO<sub>2</sub> vent

Caroselli, Erik; Gizzi, Francesca; Prada, Fiorella; Marchini, Chiara; Airi, Valentina; Kaandorp, Jaap A.; Falini, Giuseppe; Dubinsky, Zvy; Goffredo, Stefano

doi:10.1002/lno.11097

Cited by 14 publications

(20 citation statements)

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“…In our study, the supply of sufficient and nutrient rich food, common to laboratory experiments, is likely to have moderated the effects of nearfuture carbon dioxide and temperature controls (Thomsen et al, 2013;Ramajo et al, 2016;Cominassi et al, 2020), and provided the necessary nutrients for successful gamete development. Nevertheless, the physiological fitness of a species and production of gametes does not imply their viability, successful development, or recruitment to the environment (Caroselli et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Invariant Gametogenic Response of Dominant Infaunal Bivalves From the Arctic Under Ambient and Near-Future Climate Change Conditions

et al. 2021

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Arctic marine ecosystems are undergoing a series of major rapid adjustments to the regional amplification of climate change, but there is a paucity of knowledge about how changing environmental conditions might affect reproductive cycles of seafloor organisms. Shifts in species reproductive ecology may influence their entire life-cycle, and, ultimately, determine the persistence and distribution of taxa. Here, we investigate whether the combined effects of warming and ocean acidification based on near-future climate change projections affects the reproductive processes in benthic bivalves (Astarte crenata and Bathyarca glacialis) from the Barents Sea. Both species present large oocytes indicative of lecithotrophic or direct larval development after ∼4 months exposure to ambient [<2°C, ∼400 ppm (CO2)] and near-future [3–5°C, ∼550 ppm (CO2)] conditions, but we find no evidence that the combined effects of acidification and warming affect the size frequency distribution of oocytes. Whilst our observations are indicative of resilience of this reproductive stage to global changes, we also highlight that the successful progression of gametogenesis under standard laboratory conditions does not necessarily mean that successful development and recruitment will occur in the natural environment. This is because the metabolic costs of changing environmental conditions are likely to be offset by, as is common practice in laboratory experiments, feeding ad libitum. We discuss our findings in the context of changing food availability in the Arctic and conclude that, if we are to establish the vulnerability of species and ecosystems, there is a need for holistic approaches that incorporate multiple system responses to change.

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Section: Discussionmentioning

confidence: 99%

Invariant Gametogenic Response of Dominant Infaunal Bivalves From the Arctic Under Ambient and Near-Future Climate Change Conditions

et al. 2021

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“…Diminished availability of settling juveniles could inhibit the replenishment of reefs after sporadic disturbances such as storms and bleaching events (2), with the potential to compromise coral reef resilience. However, coral populations can naturally persist in acidic environments, despite having a lower recruitment efficiency in comparison to corals living at ambient pH (24).…”

Section: Discussionmentioning

confidence: 99%

Combined responses of primary coral polyps and their algal endosymbionts to decreasing seawater pH

Scucchia

Malik

Zaslansky

et al. 2021

Preprint

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With coral reefs declining globally, resilience of these ecosystems hinges on successful coral recruitment. However, knowledge of the acclimatory and/or adaptive potential in response to environmental challenges such as ocean acidification (OA) in earliest life stages is limited. Our combination of physiological measurements, microscopy, computed tomography techniques and gene expression analysis allowed us to thoroughly elucidate the mechanisms underlying the response of early life stages of corals, together with their algal partners, to the projected decline in oceanic pH. We observed extensive physiological, morphological and transcriptional changes in surviving recruits, and the transition to a less-skeleton/more-tissue phenotype. We found that decreased pH conditions stimulate photosynthesis and endosymbiont growth, and gene expression potentially linked to photosynthates translocation. Our unique holistic study discloses the previously unseen intricate net of interacting mechanisms that regulate the performance of these organisms in response to OA.

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“…Growth and population dynamics traits of many scleractinian species are sensitive to environmental conditions (Goffredo et al 2008; Rodolfo‐Metalpa et al 2008; Caroselli et al 2015) such as temperature (Goffredo et al 2007), light (Rodolfo‐Metalpa et al 2008), water flow (Purser et al 2010), nutrients (Orejas et al 2011), waves (Chappel 1980), substrate slope and structure (Vertino et al 2010), and pH (Caroselli et al 2019). As a result, depth influences coral growth and phenotype in some scleractinian corals.…”

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confidence: 99%

“…Demographic analysis of coral populations may reveal their health status and provide information to assess habitat stability and suitability (Meesters et al 2001;Caroselli et al 2016Caroselli et al , 2019. Estimating demographic traits of populations (e.g., mortality, lifespan, turnover time, recruitment) helps to assess life strategy, reproductive success, and colonization potential (Goffredo et al 2008;Caroselli et al 2019) and to understand the complex relationships between organisms and their environment (Grigg 1984;Meesters et al 2001;Caroselli et al 2016).…”

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confidence: 99%

“…However, in species where the individuals rarely fragment, bud or fuse and partial mortality is detectable by anomalies in the regular growth pattern, it is possible to determine coral age and growth to apply age-based models (Babcock 1991;Madin et al 2012). In some coral species, agesize relationships can be determined through sclerochronological analyses of annual skeletal growth bands, which can be counted on computerized tomography scans (Grigg 1984;Goffredo et al 2004Goffredo et al , 2008Caroselli et al 2016Caroselli et al , 2019.…”

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confidence: 99%

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Population dynamics of a temperate coral along a depth gradient in the Dardanelles

Caroselli

Özalp

Lavia

et al. 2020

Limnology & Oceanography

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Notwithstanding the importance of analyzing the variations of population dynamic traits along environmental gradients for assessing coral resilience to global climate change, temperate areas are more understudied than tropical regions. In the Mediterranean Sea, some studies are available for its western basin, while there is a lack of information for its eastern basin. This study starts to fill this gap, by determining the demographic characteristics of the solitary zooxanthellate scleractinian Balanophyllia europaea in the Dardanelles (Turkey) along a 1-21 m depth transect. The population dynamics of B. europaea from this site in the eastern Mediterranean Sea was compared with the populations in the NW Mediterranean Sea. In particular, the sites of Calafuria and Palinuro (Tyrrhenian Sea, Italy) were chosen for the comparison since their temperature and latitude, respectively, were similar to that of the Dardanelles population. The population density in the Dardanelles increased exponentially with depth, possibly due to lower current and wave action, and higher salinity at depth. Age structure in the Dardanelles was relatively overrepresented in younger age classes with increasing depth. Nevertheless, this difference in age structure was not strong enough to cause trends with depth for all derived demographic parameters. In comparison with Italian populations, age structure presented a higher frequency of young individuals and were more stable in the Dardanelles, likely due to the less intense wave action. Hosting different clades of symbiotic algae may also contribute to these differences, but molecular studies are necessary to verify this hypothesis.

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Low and variable pH decreases recruitment efficiency in populations of a temperate coral naturally present at a CO₂ vent

Cited by 14 publications

References 50 publications

Invariant Gametogenic Response of Dominant Infaunal Bivalves From the Arctic Under Ambient and Near-Future Climate Change Conditions

Invariant Gametogenic Response of Dominant Infaunal Bivalves From the Arctic Under Ambient and Near-Future Climate Change Conditions

Combined responses of primary coral polyps and their algal endosymbionts to decreasing seawater pH

Population dynamics of a temperate coral along a depth gradient in the Dardanelles

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Low and variable pH decreases recruitment efficiency in populations of a temperate coral naturally present at a CO2 vent

Cited by 14 publications

References 50 publications

Invariant Gametogenic Response of Dominant Infaunal Bivalves From the Arctic Under Ambient and Near-Future Climate Change Conditions

Invariant Gametogenic Response of Dominant Infaunal Bivalves From the Arctic Under Ambient and Near-Future Climate Change Conditions

Combined responses of primary coral polyps and their algal endosymbionts to decreasing seawater pH

Population dynamics of a temperate coral along a depth gradient in the Dardanelles

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Low and variable pH decreases recruitment efficiency in populations of a temperate coral naturally present at a CO₂ vent