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Coral Luminescence Identifies the Pacific Decadal Oscillation as a Primary Driver of River Runoff Variability Impacting the Southern Great Barrier Reef

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dc.contributor Australian Institute Of Marine Science
dc.contributor Nioz Royal Netherlands Inst Sea Res
dc.contributor Utrecht University
dc.contributor Sch Biol Sci
dc.contributor Royal Netherlands Institute For Sea Research (nioz)
dc.contributor University Of Western Australia
dc.contributor Univ Western Australia
dc.contributor University Of Queensland
dc.contributor Queensland University Of Technology (qut)
dc.contributor Ctr Marine Sci
dc.contributor Dept Marine Geol
dc.contributor Sch Earth Sci
dc.contributor Australian Res Council Ctr Excellence Coral Reef
dc.contributor Univ Queensland
dc.contributor Australian Inst Marine Sci
dc.contributor Sch Earth & Environm
dc.contributor Radiogen Isotope Facil ZHAO, JIAN-XIN RODRIGUEZ-RAMIREZ, ALBERTO GROVE, CRAIG A. ZINKE, JENS PANDOLFI, JOHN M. 2017-03-21T01:01:01Z 2017-03-21T01:01:01Z 2014-01-20T00:58:15Z 2019-07-08T02:15:40Z 2017-03-21T01:01:01Z 2017-03-21T01:01:01Z 2014-01-20T00:58:15Z 2019-07-08T02:15:40Z 2014-01-08
dc.identifier.citation Rodriguez-Ramirez A, Grove CA, Zinke J, Pandolfi JM, Zhao J-x (2014) Coral luminescence identifies the Pacific Decadal Oscillation as a primary driver of river runoff variability impacting the southern Great Barrier Reef. PLoS ONE 9(1): e84305 en_US
dc.identifier.issn 1932-6203
dc.description.abstract The Pacific Decadal Oscillation (PDO) is a large-scale climatic phenomenon modulating ocean-atmosphere variability on decadal time scales. While precipitation and river flow variability in the Great Barrier Reef (GBR) catchments are sensitive to PDO phases, the extent to which the PDO influences coral reefs is poorly understood. Here, six Porites coral cores were used to produce a composite record of coral luminescence variability (runoff proxy) and identify drivers of terrestrial influence on the Keppel reefs, southern GBR. We found that coral skeletal luminescence effectively captured seasonal, inter-annual and decadal variability of river discharge and rainfall from the Fitzroy River catchment. Most importantly, although the influence of El Nino-Southern Oscillation (ENSO) events was evident in the luminescence records, the variability in the coral luminescence composite record was significantly explained by the PDO. Negative luminescence anomalies (reduced runoff) were associated with El Nino years during positive PDO phases while positive luminescence anomalies (increased runoff) coincided with strong/moderate La Nino years during negative PDO phases. This study provides clear evidence that not only ENSO but also the PDO have significantly affected runoff regimes at the Keppel reefs for at least a century, and suggests that upcoming hydrological disturbances and ecological responses in the southern GBR region will be mediated by the future evolution of these sources of climate variability.
dc.description.sponsorship A Graduate School International Travel Award (GSITA) from The University of Queensland and the PADI foundation to ARR supported the luminescence analysis of the cores at the Royal Netherlands Institute for Sea Research (NIOZ). This work was partially funded by the Marine and Tropical Science Research Facility (MTSRF) Project 1.1.4 granted to JXZ, JMP and others; the ARC discovery project DP0773081 granted to JXZ, and others; the NERP Tropical Ecosystems Hub Project 1.3 to JXZ, JMP., and others. Sample collection was conducted under the GBRMPA permit number G10/33402.1. JZ was supported by an IOMRC UWA/AIMS/CSIRO postdoctoral fellowship. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher PLoS en_US
dc.relation.ispartof Null
dc.rights Attribution 3.0 Australia *
dc.rights.uri *
dc.subject Eastern Australia
dc.subject Science & Technology - Other Topics
dc.subject Interdecadal Climate Variability
dc.subject Multidisciplinary Sciences
dc.subject El-nino
dc.subject Rainfall Variability
dc.subject Fitzroy River
dc.subject Spectral Luminescence
dc.subject Enso Teleconnections
dc.subject Multidecadal Variability
dc.subject Sea-surface Temperature
dc.subject Fluorescent Bands
dc.title Coral Luminescence Identifies the Pacific Decadal Oscillation as a Primary Driver of River Runoff Variability Impacting the Southern Great Barrier Reef
dc.type journal article en_US
dc.identifier.doi 10.1371/journal.pone.0084305
dc.identifier.wos WOS:000329862500112

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