A novel paleo-bleaching proxy using boron isotopes and high-resolution laser ablation to reconstruct coral bleaching events

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dc.identifier.uri http://dx.doi.org/10.15488/1076
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/1100
dc.contributor.author Dishon, G.
dc.contributor.author Fisch, J.
dc.contributor.author Horn, Ingo
dc.contributor.author Kaczmarek, Karina
dc.contributor.author Bijma, Jelle
dc.contributor.author Gruber, D.F.
dc.contributor.author Nir, O.
dc.contributor.author Popovich, Y.
dc.contributor.author Tchernov, D.
dc.date.accessioned 2017-02-02T13:56:58Z
dc.date.available 2017-02-02T13:56:58Z
dc.date.issued 2015
dc.identifier.citation Dishon, G.; Fisch, J.; Horn, I.; Kaczmarek, K.; Bijma, J. et al.: A novel paleo-bleaching proxy using boron isotopes and high-resolution laser ablation to reconstruct coral bleaching events. In: Biogeosciences 12 (2015), Nr. 19, S. 5677-5687. DOI: https://doi.org/10.5194/bg-12-5677-2015
dc.description.abstract Coral reefs occupy only similar to 0.1 percent of the ocean's habitat, but are the most biologically diverse marine ecosystem. In recent decades, coral reefs have experienced a significant global decline due to a variety of causes, one of the major causes being widespread coral bleaching events. During bleaching, the coral expels its symbiotic algae, thereby losing its main source of nutrition generally obtained through photosynthesis. While recent coral bleaching events have been extensively investigated, there is no scientific data on historical coral bleaching prior to 1979. In this study, we employ high-resolution femtosecond Laser Ablation Multiple Collector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS) to demonstrate a distinct biologically induced decline of boron (B) isotopic composition (delta B-11) as a result of coral bleaching. These findings and methodology offer a new use for a previously developed isotopic proxy to reconstruct paleo-coral bleaching events. Based on a literature review of published delta B-11 data and our recorded vital effect of coral bleaching on the delta B-11 signal, we also describe at least two possible coral bleaching events since the Last Glacial Maximum. The implementation of this bleaching proxy holds the potential of identifying occurrences of coral bleaching throughout the geological record. A deeper temporal view of coral bleaching will enable scientists to determine if it occurred in the past during times of environmental change and what outcome it may have had on coral population structure. Understanding the frequency of bleaching events is also critical for determining the relationship between natural and anthropogenic causes of these events. eng
dc.description.sponsorship BMBF/03V0956
dc.description.sponsorship National Science Foundation/0920572
dc.description.sponsorship SBM
dc.description.sponsorship Minerva foundation
dc.language.iso eng
dc.publisher Göttingen : Copernicus GmbH
dc.relation.ispartofseries Biogeosciences 12 (2015), Nr. 19
dc.rights CC BY 3.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/3.0/
dc.subject south china sea eng
dc.subject ocean acidification eng
dc.subject scleractinian corals eng
dc.subject climate-change eng
dc.subject surface-temperature eng
dc.subject porites corals eng
dc.subject caribbean sea eng
dc.subject seawater ph eng
dc.subject boric-acid eng
dc.subject reef eng
dc.subject.ddc 550 | Geowissenschaften ger
dc.title A novel paleo-bleaching proxy using boron isotopes and high-resolution laser ablation to reconstruct coral bleaching events eng
dc.type article
dc.type Text
dc.relation.essn 1726-4189
dc.relation.issn 1726-4170
dc.relation.doi https://doi.org/10.5194/bg-12-5677-2015
dc.bibliographicCitation.issue 19
dc.bibliographicCitation.volume 12
dc.bibliographicCitation.firstPage 5677
dc.bibliographicCitation.lastPage 5687
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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