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A change in coral extension rates and stable isotopes after El Nino-induced coral bleaching and regional stress events

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dc.contributor Sch Geog Archaeol & Environm Studies
dc.contributor University Of Witwatersrand
dc.contributor Inst Geowissensch
dc.contributor Geomar Helmholtz Center For Ocean Research Kiel
dc.contributor Geomar Helmholtz Zentrum Ozeanforsch Kiel
dc.contributor Rwth Aachen University
dc.contributor Free Univ Berlin
dc.contributor Dept Environm & Agr
dc.contributor Curtin University
dc.contributor Univ Witwatersrand
dc.contributor Free University Of Berlin
dc.contributor Curtin Univ Technol
dc.contributor Geol Inst
dc.contributor Rhein Westfal Th Aachen
dc.contributor University Of Kiel
dc.contributor Inst Paleontol
dc.contributor Australian Inst Marine Sci
dc.contributor Cau Kiel
dc.contributor Australian Institute Of Marine Science
dc.contributor Helmholtz Association
dc.contributor.author GARBE-SCHOENBERG, D.
dc.contributor.author HETZINGER, S.
dc.contributor.author PFEIFFER, M.
dc.contributor.author DULLO, W. -CHR.
dc.contributor.author ZINKE, J.
dc.date.accessioned 2017-03-21T01:05:06Z
dc.date.accessioned 2017-01-13T00:47:32Z
dc.date.accessioned 2017-01-13T00:47:32Z
dc.date.accessioned 2018-11-01T03:07:45Z
dc.date.available 2017-01-13T00:47:32Z
dc.date.available 2017-01-13T00:47:32Z
dc.date.available 2017-03-21T01:05:06Z
dc.date.available 2018-11-01T03:07:45Z
dc.date.issued 2016-09-13
dc.identifier.citation Hetzinger S, Pfeiffer M, Dullo W-Chr, Zinke J, Garbe-Schönberg D (2016) A change in coral extension rates and stable isotopes after El Niño-induced coral bleaching and regional stress events. Scientific Reports 6: 32879 en_US
dc.identifier.issn 2045-2322
dc.identifier.uri http://epubs.aims.gov.au/11068/13174
dc.description.abstract Coral reefs are biologically diverse ecosystems threatened with effective collapse under rapid climate change, in particular by recent increases in ocean temperatures. Coral bleaching has occurred during major El Nino warming events, at times leading to the die-off of entire coral reefs. Here we present records of stable isotopic composition, Sr/Ca ratios and extension rate (1940-2004) in coral aragonite from a northern Venezuelan site, where reefs were strongly impacted by bleaching following the 1997-98 El Nino. We assess the impact of past warming events on coral extension rates and geochemical proxies. A marked decrease in coral (Pseudodiploria strigosa) extension rates coincides with a baseline shift to more negative values in oxygen and carbon isotopic composition after 1997-98, while a neighboring coral (Siderastrea siderea) recovered to pre-bleaching extension rates simultaneously. However, other stressors, besides high temperature, might also have influenced coral physiology and geochemistry. Coastal Venezuelan reefs were exposed to a series of extreme environmental fluctuations since the mid-1990s, i.e. upwelling, extreme rainfall and sediment input from landslides. This work provides important new data on the potential impacts of multiple regional stress events on coral isotopic compositions and raises questions about the long-term influence on coral-based paleoclimate reconstructions.
dc.description.sponsorship We thank J. Estevez for logistical support during fieldwork and L. Haxhiaj for lab assistance. This research was funded by the Deutsche Forschungsgemeinschaft (Sonderforschungsbereich 460-B1 and Du129/33 [Leibniz award]). J.Z. was supported by a Curtin Senior Fellowship in Western Australia, and an Honorary Fellowship with the University of the Witwatersrand, South Africa.
dc.description.sponsorship This research was funded by the Deutsche Forschungsgemeinschaft (Sonderforschungsbereich 460-B1 and Du129/33 [Leibniz award]). J.Z. was supported by a Curtin Senior Fellowship in Western Australia, and an Honorary Fellowship with the University of the Witwatersrand, South Africa. en_US
dc.description.uri http://www.nature.com/articles/srep32879#author-information en_US
dc.language English
dc.language.iso en en_US
dc.publisher Nature Publishing en_US
dc.relation.ispartof Null
dc.rights Attribution 3.0 Australia *
dc.rights.uri http://creativecommons.org/licenses/by/3.0/au/ *
dc.subject Reef
dc.subject Science & Technology - Other Topics
dc.subject Growth
dc.subject Multidisciplinary Sciences
dc.subject Venezuela
dc.subject Climate-change
dc.subject Porites-lutea Coral
dc.subject Scleractinian Corals
dc.subject Carbon
dc.subject Temperature
dc.subject Sr/ca Ratios
dc.subject Oxygen
dc.title A change in coral extension rates and stable isotopes after El Nino-induced coral bleaching and regional stress events
dc.type journal article en_US
dc.identifier.doi 10.1038/srep32879
dc.identifier.wos WOS:000382927000001


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