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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

10.1002/ncr.4100500207

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1432-0975

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Visibly healthy corals exhibit variable pigment co

Authors: A M Apprill R R Bidigare R D Gates
Publish Date: 2007/03/21
Volume: 26, Issue: 2, Pages: 387-397
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Abstract

Understanding the natural variability of photosynthetic pigment ranges and distributions in healthy corals is central to evaluating how useful these measurements are for assessing the health and bleaching status of endosymbiotic reefbuilding corals This study examined the photosynthetic pigment variability in visibly healthy Porites lobata and Porites lutea corals from Kaneohe Bay Hawaii and explored whether pigment variability was related to the genetic identity or phenotypic characteristics of the symbionts Concentrations of the photosynthetic pigments chlorophyll a peridinin chlorophyll c 2 diadinoxanthin diatoxanthin ββcarotene and dinoxanthin were quantified using highperformance liquid chromatography HPLC Pigment concentrations were found to range 15–10 fold in colonies of each species at similar depths 0–2 2–4 10–15 and 19–21 m Despite the high pigment variability pigment ratios for each species were relatively conserved over the 0–21 m depth gradient The genetic identity of the symbiont communities was examined for each colony using 18S nuclear ribosomal DNA nrDNA restriction fragment length polymorphisms All colonies contained symbionts belonging to clade C The density and phenotypic characteristics of the symbionts were explored using flow cytometry and fluorescence and side scatter cell size properties revealed phenotypically distinct symbiont subpopulations in every colony The symbiont subpopulations displayed pigment trends that may be driven by acclimatization to irradiance microenvironments within the host These results highlight the biological complexity of healthy coral–symbiont associations and the need for future research on pigments and symbiont subpopulation dynamicsWe greatly appreciate the contributions of E Hochberg for field logistics and support and the assistance of A Andersson C Conger K Fagan E Hochberg S Kahng T A Mooney S Ringuet A Rivera and G Susner for coral collections Data from the Coconut Island weather station was provided courtesy of E Cox and K Rodgers The authors express special thanks to S Christensen for assistance with the HPLC measurements and K Selph for assistance with the flow cytometry We also thank E Hochberg and M Atkinson for their comments on the Masters thesis from which this work was taken We acknowledge financial support from the PADI Project AWARE Foundation and a NSF graduate research fellowship to AMA This is the HIMB contribution number 1263 and SOEST contribution number 7068

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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. Light availability determines susceptibility of reef building corals to ocean acidification
  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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