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Title of Journal: Coral Reefs

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Abbravation: Coral Reefs

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Springer-Verlag

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DOI

10.1007/bf01501576

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1432-0975

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Light availability determines susceptibility of re

Authors: D J Suggett L F Dong T Lawson E Lawrenz L Torres D J Smith
Publish Date: 2012/12/22
Volume: 32, Issue: 2, Pages: 327-337
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Abstract

Elevated seawater pCO2 and in turn ocean acidification OA is now widely acknowledged to reduce calcification and growth of reef building corals As with other environmental factors eg temperature and nutrients light availability fundamentally regulates calcification and is predicted to change for future reef environments alongside elevated pCO2 via altered physical processes eg sea level rise and turbidity however any potential role of light in regulating the OAinduced reduction of calcification is still unknown We employed a multifactorial growth experiment to determine how light intensity and pCO2 together modify calcification for model coral species from two key genera Acropora horrida and Porites cylindrica occupying similar ecological niches but with different physiologies We show that elevated pCO2 OAinduced losses of calcification in the light G L but not darkness G D were greatest under lowlight growth conditions in particular for A horrida Highlight growth conditions therefore dampened the impact of OA upon G L but not G D Gross photosynthesis P G responded in a reciprocal manner to G L suggesting OArelieved pCO2 limitation of P G under highlight growth conditions to effectively enhance G L A multivariate analysis of past OA experiments was used to evaluate whether our test species responses were more widely applicable across their respective genera Indeed the light intensity for growth was identified as a significant factor influencing the OAinduced decline of calcification for species of Acropora but not Porites Whereas lowlight conditions can provide a refuge for hard corals from thermal and light stress our study suggests that lower light availability will potentially increase the susceptibility of key coral species to OAWe are extremely grateful to two anonymous reviewers and to Neil Chan and Sean Connolly ICRS Cairns 2012 for their insightful comments that helped to improve upon an earlier version of the manuscript and also to Mr Russell Smart and Ms Sarah JaneWalsh for support in maintaining coral acclimation tanks and monitoring seawater chemistry Funding was provided by the National Environmental Research Council UK NERC grant NE/G020116/1 Author contributions DJSu TL and DJSm conceived the study and wrote the paper LD and TL constructed the CO2stat facility and with LT produced and analyzed experimental data EL and DJSu collated and analysed the metadata set

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Other Papers In This Journal:
  1. Short- and long-term movements of painted lobster ( Panulirus versicolor ) on a coral reef at Northwest Island, Australia
  2. “Locally extinct” coral species Seriatopora hystrix found at upper mesophotic depths in Okinawa
  3. Competitive interactions between corals and Trididemnum solidum on Mexican Caribbean reefs
  4. Plasticity in skeletal characteristics of nursery-raised staghorn coral, Acropora cervicornis
  5. Turbinaria ornata invasion in the Tuamotu Archipelago, French Polynesia: ocean drift connectivity
  6. Characterisation of coral explants: a model organism for cnidarian–dinoflagellate studies
  7. Do no-take reserves benefit Florida’s corals? 14 years of change and stasis in the Florida Keys National Marine Sanctuary
  8. Skeletal morphogenesis and growth mode of modern and fossil deep-water isidid gorgonians (Octocorallia) in the West Pacific (New Zealand and Sea of Okhotsk)
  9. Widespread occurrence of mycosporine-like amino acid compounds in scleractinians from French Polynesia
  10. Spawning and fertility of F 1 hybrids of the coral genus Acropora in the Indo-Pacific
  11. Measuring coral reef community metabolism using new benthic chamber technology
  12. Climate change and coral reefs: Trojan horse or false prophecy?
  13. A map of human impacts to a “pristine” coral reef ecosystem, the Papahānaumokuākea Marine National Monument
  14. Skeletal records of community-level bleaching in Porites corals from Palau
  15. Guard crabs alleviate deleterious effects of vermetid snails on a branching coral
  16. Effect of ocean warming and acidification on the early life stages of subtropical Acropora spicifera
  17. Effects of predation on diel activity and habitat use of the coral-reef shrimp Cinetorhynchus hendersoni (Rhynchocinetidae)
  18. Quantifying the quality of coral bleaching predictions
  19. Targeted demersal fish species exhibit variable responses to long-term protection from fishing at the Houtman Abrolhos Islands
  20. Auditory sensitivity in settlement-stage larvae of coral reef fishes
  21. Visibly healthy corals exhibit variable pigment concentrations and symbiont phenotypes
  22. A physical derivation of nutrient-uptake rates in coral reefs: effects of roughness and waves
  23. Recurrent partial mortality events in winter shape the dynamics of the zooxanthellate coral Oculina patagonica at high latitude in the Mediterranean
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