Annual fluctuation in the stable carbon isotope ratio of coral skeletons: The relative intensities of kinetic and metabolic isotope effects

Omata, Tamano; Suzuki, Atsushi; Kawahat, Hodaka; Okamoto, Mineo

doi:10.1016/j.gca.2004.12.018

Cited by 33 publications

(36 citation statements)

References 44 publications

(63 reference statements)

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“…This suggests that kinetic fractionation increased again after the bleaching event, leading to less incorporation of 13 C into the skeleton. Authors have attempted to remove kinetic effects from skeletal d 13 C records through modeling (Heikoop et al 2000;Adkins et al 2003;Omata et al 2005), but such an assessment was beyond the scope of this study.…”

Section: Long-term Trendsmentioning

confidence: 99%

Stable isotopic records of bleaching and endolithic algae blooms in the skeleton of the boulder forming coral Montastraea faveolata

et al. 2010

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Within boulder forming corals, fixation of dissolved inorganic carbon is performed by symbiotic dinoflagellates within the coral tissue and, to a lesser extent, endolithic algae within the coral skeleton. Endolithic algae produce distinctive green bands in the coral skeleton, and their origin may be related to periods of coral bleaching due to complete loss of dinoflagellate symbionts or ''paling'' in which symbiont populations are patchily reduced in coral tissue. Stable carbon isotopes were analyzed in coral skeletons across a known bleaching event and 12 blooms of endolithic algae to determine whether either of these types of changes in photosynthesis had a clear isotopic signature. Stable carbon isotopes tended to be enriched in the coral skeleton during the initiation of endolith blooms, consistent with enhanced photosynthesis by endoliths. In contrast, there were no consistent d 13 C patterns directly associated with bleaching, suggesting that there is no unique isotopic signature of bleaching. On the other hand, isotopic values after bleaching were lighter 92% of the time when compared to the bleaching interval. This marked drop in skeletal d 13 C may reflect increased kinetic fractionation and slow symbiont recolonization for several years after bleaching.

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Section: Long-term Trendsmentioning

confidence: 99%

Stable isotopic records of bleaching and endolithic algae blooms in the skeleton of the boulder forming coral Montastraea faveolata

et al. 2010

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“…3b), indicating high d 13 C values in the framework skeleton and low d 13 C values in the infilling skeleton. Metabolic carbon may have a low d 13 C value (e.g., Omata et al, 2005). Gladfelter (1983b) observed inward ciliary currents in A. cervicornis.…”

Section: Element Profiles Of the Axial Corallitementioning

confidence: 99%

Minor and trace element incorporation into branching coral Acropora nobilis skeleton

Shirai

Kawashima

Sowa

et al. 2008

Geochimica et Cosmochimica Acta

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“…Proxy development for reconstruction of light cycle can open new opportunities on past climate study; in that, the insolation is a 'driving force' whereas conventional proxies reconstruct the consequential 'environment' . Few attempts have been made to estimate the past light cycle with hourly insolation, using environmental proxies such as carbonate chemistry and isotopes 10,11 , but none has succeeded. Several recent microanalytical studies have extracted valuable knowledge related to palaeoclimate data 12,13 , but not the daily light cycle.…”

mentioning

confidence: 99%

Past daily light cycle recorded in the strontium/calcium ratios of giant clam shells

et al. 2012

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The historical record of daily light cycle in tropical and subtropical regions is short. moreover, it remains difficult to extract this cycle in the past from natural archives such as biogenic marine carbonates. Here we describe the precise analysis of sr/Ca, mg/Ca, and Ba/Ca ratios in a cultivated giant clam shell, using a laterally high-resolution secondary ion mass spectrometer with 2 µm resolution. The sr/Ca ratio exhibits striking diurnal variations, reflecting the daily light cycle. A clear seasonal variation in sr/Ca is also observed in another longer set of measurements with 50 µm resolution. Light-enhanced calcification and elemental transportation processes, in giant clam and symbiotic algae, may explain these diurnal and annual variations. This opens the possibility to develop the sr/Ca ratio from a giant clam shell as an effective proxy for parameters of the daily light cycle.

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Annual fluctuation in the stable carbon isotope ratio of coral skeletons: The relative intensities of kinetic and metabolic isotope effects

Cited by 33 publications

References 44 publications

Stable isotopic records of bleaching and endolithic algae blooms in the skeleton of the boulder forming coral Montastraea faveolata

Stable isotopic records of bleaching and endolithic algae blooms in the skeleton of the boulder forming coral Montastraea faveolata

Minor and trace element incorporation into branching coral Acropora nobilis skeleton

Past daily light cycle recorded in the strontium/calcium ratios of giant clam shells

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