Major loss of coralline algal diversity in response to ocean acidification

Peña, Viviana; Harvey, Ben P.; Agostini, Sylvain; Porzio, Lucia; Milazzo, Marco; Horta, Paulo Antunes; Gall, Line Le; Hall-Spencer, Jason M.

doi:10.1111/gcb.15757

Cited by 31 publications

(14 citation statements)

References 110 publications

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“…Whether this variability is found in molecular responses as well as previously measured physiological and biological responses remains unexplored. From previous literature, some species of CCA tend to be more resistant to OW and OA [23,24], whereas other species seem to be more sensitive [19,[24][25][26] (Fig. 1a,b, Additional file 1, Table S1).…”

Section: Introductionmentioning

confidence: 62%

“…Furthermore, future studies should continue to investigate the responses of additional species of tropical CCA, across multiple clades and groups (e.g. Peña et al 2021 [26] for temperate corallines) to investigate further species-specific response to climate stressors by systematically testing other possible contributing factors such as evolutionary history, acclimatisation history, and environmental history.…”

Section: Discussionmentioning

confidence: 99%

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Transcriptomic stability or lability explains sensitivity to climate stressors in coralline algae

et al. 2022

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Background Crustose coralline algae (CCA) are calcifying red macroalgae that play important ecological roles including stabilisation of reef frameworks and provision of settlement cues for a range of marine invertebrates. Previous research into the responses of CCA to ocean warming (OW) and ocean acidification (OA) have found magnitude of effect to be species-specific. Response to OW and OA could be linked to divergent underlying molecular processes across species. Results Here we show Sporolithon durum, a species that exhibits low sensitivity to climate stressors, had little change in metabolic performance and did not significantly alter the expression of any genes when exposed to temperature and pH perturbations. In contrast, Porolithon onkodes, a major coral reef builder, reduced photosynthetic rates and had a labile transcriptomic response with over 400 significantly differentially expressed genes, with differential regulation of genes relating to physiological processes such as carbon acquisition and metabolism. The differential gene expression detected in P. onkodes implicates possible key metabolic pathways, including the pentose phosphate pathway, in the stress response of this species. Conclusions We suggest S. durum is more resistant to OW and OA than P. onkodes, which demonstrated a high sensitivity to climate stressors and may have limited ability for acclimatisation. Understanding changes in gene expression in relation to physiological processes of CCA could help us understand and predict how different species will respond to, and persist in, future ocean conditions predicted for 2100.

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Section: Introductionmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Transcriptomic stability or lability explains sensitivity to climate stressors in coralline algae

et al. 2022

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“…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. Peña et al 2021). Therefore, acidification is also likely to cause shifts in community composition of CCA on reefs.…”

Section: Crustose Coralline Algae (Cca)mentioning

confidence: 99%

“…Effects on recruitment have yet to be investigated at any other site. However, acidification also appears to reduce reef cementation in the ETP (Manzello et al 2008) and at the Shikine vent in Japan where the thick carbonate crusts formed in part by CCA were notably thinner (Peña et al 2021). This indicates a potential reduction in substrate stability in the future, with further implications for additional declines in recruitment.…”

Section: Evidence Of Indirect Effects At Naturally Acidified Locationsmentioning

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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“…Coralline algae, fully calcified marine autotrophic organisms, are one of the most endangered algal groups due to global temperature increase and ocean acidification (e.g., Martin and Hall-Spencer, 2017;Cornwall et al, 2021). Laboratory studies and field observations indicate that coralline algae might be negatively affected due to ocean acidification derived from the greenhouse gasses release (Anthony et al, 2008;Hall-Spencer et al, 2008;Martin and Gattuso, 2009;Büdenbender et al, 2011;Diaz-Pulido et al, 2012;Kamenos et al, 2013;Guy-Haim et al, 2016;Martin and Hall-Spencer, 2017;Peña et al, 2020a;Cornwall et al, 2021). Nonetheless, contradictory or non-conclusive results have also been obtained (Martin and Hall-Spencer, 2017;Peña et al, 2020a;Cornwall et al, 2021;and references therein) due to acclimation of coralline algae to acidification, physiological advantages (preadaptations) or interaction with other non-calcified epiphytes growing on corallines (Martin and Hall-Spencer, 2017;Guy-Haim et al, 2020;Peña et al, 2020a;Cornwall et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Coralline Algae at the Paleocene/Eocene Thermal Maximum in the Southern Pyrenees (N Spain)

2022

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During the Paleocene/Eocene Thermal Maximum, ~55.6 Ma, the Earth experienced the warmest event of the last 66 Ma due to a massive release of CO2. This event lasted for ~100 thousands of years with the consequent ocean acidification (estimated pH = 7.8-7.6). In this paper, we analyze the effects of this global environmental shift on coralline algal assemblages in the Campo and Serraduy sections, in the south-central Pyrenees (Huesca, N Spain), where the PETM is recorded within coastal-to-shallow marine carbonate and siliciclastic deposits. In both sections, coralline algae occur mostly as fragments, although rhodoliths and crusts coating other organisms are also frequent. Rhodoliths occur either dispersed or locally forming dense concentrations (rhodolith beds). Distichoplax biserialis and geniculate forms (mostly Jania nummulitica) of the order Corallinales dominated the algal assemblages followed by Sporolithales and Hapalidiales. Other representatives of Corallinales, namely Spongites, Lithoporella as well as Neogoniolithon, Karpathia, and Hydrolithon, are less abundant. Species composition does not change throughout the Paleocene/Eocene boundary but the relative abundance of coralline algae as components of the carbonate sediments underwent a reduction. They were abundant during the late Thanetian but became rare during the early Ypresian. This abundance decrease is due to a drastic change in the local paleoenvironmental conditions immediately after the boundary. A hardground at the top of the Thanetian carbonates was followed by continental sedimentation. After that, marine sedimentation resumed in shallow, very restricted lagoon and peritidal settings, where muddy carbonates rich in benthic foraminifera, e.g., milioliids (with abundant Alveolina) and soritids, and eventually stromatolites were deposited. These initial restricted conditions were unfavorable for coralline algae. Adverse conditions continued to the end of the study sections although coralline algae reappeared and were locally frequent in some beds, where they occurred associated with corals. In Serraduy, the marine reflooding was also accompanied by significant terrigenous supply, precluding algal development. Therefore, the observed changes in coralline algal assemblages during the PETM in the Pyrenees were most likely related to local paleoenvironmental shifts rather than to global oceanic or atmospheric alterations.

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Major loss of coralline algal diversity in response to ocean acidification

Cited by 31 publications

References 110 publications

Transcriptomic stability or lability explains sensitivity to climate stressors in coralline algae

Transcriptomic stability or lability explains sensitivity to climate stressors in coralline algae

The indirect effects of ocean acidification on corals and coral communities

Coralline Algae at the Paleocene/Eocene Thermal Maximum in the Southern Pyrenees (N Spain)

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