Ocean acidification reduces net calcification and wound healing in the tropical crustose coralline alga, Porolithon onkodes (Corallinales, Rhodophyta)

Manning, Joshua C.; Carpenter, Robert C.; Miranda, Elena A.

doi:10.1016/j.jembe.2019.151225

Cited by 9 publications

(6 citation statements)

References 70 publications

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“…Our field observations thus support the results of many experimental studies that have demonstrated that CCA is likely to be among the coral reef taxa most susceptible to ocean acidification. This elevated sensitivity is due to the calcified algae's highly soluble, high Mg-calcite skeletons that dissolve more rapidly under acidified conditions than aragonitic coral skeletons, which can in turn reduce productivity, calcification, recruitment, and abundance (Kuffner et al, 2008;Diaz-Pulido et al, 2014;Ordoñez et al, 2014;Fabricius et al, 2015;Dutra et al, 2016;Manning et al, 2019). As CCA plays an important ecological role in both reef cementation and coral recruitment (Price, 2010;Manning et al, 2019), their vulnerability to ocean acidification will likely also threaten future reef ecosystem persistence.…”

Section: Discussionmentioning

confidence: 99%

“…Most of our current understanding of coral reef ecosystem sensitivities to ocean acidification is derived from laboratory manipulation studies. Single-species and mesocosm perturbation experiments can provide direct evidence of coral reef taxa responses to shifts in carbonate chemistry in controlled environments, and numerous studies have shown that calcification rates of some (but not all) coral species, crustose coralline algae (CCA), and other calcifying marine taxa decline significantly with decreasing W ar (Kuffner et al, 2008;Kroeker et al, 2010;Chan and Connolly, 2013;Kroeker et al, 2013;Manning et al, 2019). Paired with observations of accelerating rates of calcium carbonate dissolution and bioerosion under acidified conditions (Wisshak et al, 2012;Schönberg et al, 2017), many predictions for coral reef ecosystems under ocean acidification therefore converge on a paradigm of future reef communities that are algal-dominated, structurally simplified, and net eroding (Hoegh-Guldberg et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Coral reef carbonate accretion rates track stable gradients in seawater carbonate chemistry across the U.S. Pacific Islands

et al. 2022

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The U.S. Pacific Islands span a dramatic natural gradient in climate and oceanographic conditions, and benthic community states vary significantly across the region’s coral reefs. Here we leverage a decade of integrated ecosystem monitoring data from American Samoa, the Mariana Archipelago, the main and Northwestern Hawaiian Islands, and the U.S. Pacific Remote Island Areas to evaluate coral reef community structure and reef processes across a strong natural gradient in pH and aragonite saturation state (Ωar). We assess spatial patterns and temporal trends in carbonate chemistry measured in situ at 37 islands and atolls between 2010 and 2019, and evaluate the relationship between long-term mean Ωar and benthic community cover and composition (benthic cover, coral genera, coral morphology) and reef process (net calcium carbonate accretion rates). We find that net carbonate accretion rates demonstrate significant sensitivity to declining Ωar, while most benthic ecological metrics show fewer direct responses to lower-Ωar conditions. These results indicate that metrics of coral reef net carbonate accretion provide a critical tool for monitoring the long-term impacts of ocean acidification that may not be visible by assessing benthic cover and composition alone. The perspectives gained from our long-term, in situ, and co-located coral reef environmental and ecological data sets provide unique insights into effective monitoring practices to identify potential for reef resilience to future ocean acidification and inform effective ecosystem-based management strategies under 21st century global change.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coral reef carbonate accretion rates track stable gradients in seawater carbonate chemistry across the U.S. Pacific Islands

et al. 2022

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“…CCA, like corals, are calcifying organisms and are therefore likely to be negatively affected by acidification. For example, increased pCO 2 on CCA has been shown to cause declines in recruitment (Ordoñez et al 2017), competitive ability (Kuffner et al 2008;Crook et al 2016), growth (Johnson et al 2014), calcification and recovery following injury (Manning et al 2019). Ultimately, these changes result in up to 70 to 90% declines in CCA abundance (Kuffner et al 2008;Fabricius et al 2015;Vogel et al 2016), however, these effects are species specific with some species persisting while others suffer reduced abundance or are lost completely (e.g.…”

Section: Crustose Coralline Algae (Cca)mentioning

confidence: 99%

The indirect effects of ocean acidification on corals and coral communities

Hill

Hoogenboom

2022

Coral Reefs

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Ocean acidification (OA) is a major threat to marine calcifying organisms. This manuscript gives an overview of the physiological effects of acidification on reef-building corals from a cellular to population scale. In addition, we present the first review of the indirect effects resulting from altered species interactions. We find that the direct effects of acidification are more consistently negative at larger spatial scales, suggesting an accumulation of sub-lethal physiological effects can result in notable changes at a population and an ecosystem level. We identify that the indirect effects of acidification also have the potential to contribute to declines in coral cover under future acidified conditions. Of particular concern for reef persistence are declines in the abundance of crustose coralline algae which can result in loss of stable substrate and settlement cues for corals, potentially compounding the direct negative effects on coral recruitment rates. In addition, an increase in the abundance of bioeroders and bioerosive capacity may compound declines in calcification and result in a shift towards net dissolution. There are significant knowledge gaps around many indirect effects, including changes in herbivory and associated coral–macroalgal interactions, and changes in habitat provision of corals to fish, invertebrates and plankton, and the impact of changes to these interactions for both individual corals and reef biodiversity as structural complexity declines. This research highlights the potential of indirect effects to contribute to alterations in reef ecosystem functions and processes. Such knowledge will be critical for scaling-up the impacts of OA from individual corals to reef ecosystems and for understanding the effects of OA on reef-dependent human societies.

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“…Significant loss of CaCO 3 may increase the susceptibility of coralline algae to grazing and other damage (Johnson & Carpenter 2012, Manning et al 2019. However, Martone et al (2021) found that a complete loss of CaCO 3 had no effect on grazing rates of the urchin Strongylocentrotus purpuratus on Corallina, and a decrease of at least 20% CaCO 3 was necessary to significantly increase urchin grazing rates on Calliarthron.…”

Section: Calcificationmentioning

confidence: 99%

Effects of temperature and pH on the growth, calcification, and biomechanics of two species of articulated coralline algae

Guenther

Porcher

Carrington

et al. 2022

Mar. Ecol. Prog. Ser.

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Ocean warming and acidification are predicted to impact the physiology of marine organisms, especially marine calcifiers that must deposit calcium carbonate and resist dissolution. Of particular concern are articulated coralline algae, which must maintain both calcified segments (intergenicula) and uncalcified joints (genicula) in order to thrive along wave-swept rocky coastlines. We examined the effect of pH and temperature, both individually and in combination, on the growth, calcification, and biomechanical properties of 2 species of articulated coralline algae, Corallina vancouveriensis and Calliarthron tuberculosum, common on wave-exposed shores in the NE Pacific. Increased temperature and reduced pH were found to reduce growth rates in both species (30-89% lower) but had little influence on the amount of intergenicular calcium carbonate or on the genicular biomechanical properties of these species. Results suggest that although growth rates may decline, these 2 coralline species will maintain the integrity of their tissues and continue to persist under future climate stress.

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Ocean acidification reduces net calcification and wound healing in the tropical crustose coralline alga, Porolithon onkodes (Corallinales, Rhodophyta)

Cited by 9 publications

References 70 publications

Coral reef carbonate accretion rates track stable gradients in seawater carbonate chemistry across the U.S. Pacific Islands

Coral reef carbonate accretion rates track stable gradients in seawater carbonate chemistry across the U.S. Pacific Islands

The indirect effects of ocean acidification on corals and coral communities

Effects of temperature and pH on the growth, calcification, and biomechanics of two species of articulated coralline algae

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