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Historical mortality in massive Porites from the central Great Barrier Reef, Australia:evidence for past envrironmental stress?

Hendy, E; Lough, Janice; Gagan, Michael

Description

Two hiatuses in coral skeleton growth, associated tissue death and subsequent regrowth, were discovered while dating eight multi-century Parites coral cores collected from the central Great Barrier Reef (GBR), Australia. Cross-dating of characteristic annual luminescent lines visible in the coral core slices under UV-light (Hendy et al. 2003) accurately dated the two events to 1782-85 and 1817 A.D., Die-off scars were observed in only one core for each event. X-radiographs and photographs taken...[Show more]

dc.contributor.authorHendy, E
dc.contributor.authorLough, Janice
dc.contributor.authorGagan, Michael
dc.date.accessioned2015-12-13T22:34:46Z
dc.date.available2015-12-13T22:34:46Z
dc.identifier.issn0722-4028
dc.identifier.urihttp://hdl.handle.net/1885/76275
dc.description.abstractTwo hiatuses in coral skeleton growth, associated tissue death and subsequent regrowth, were discovered while dating eight multi-century Parites coral cores collected from the central Great Barrier Reef (GBR), Australia. Cross-dating of characteristic annual luminescent lines visible in the coral core slices under UV-light (Hendy et al. 2003) accurately dated the two events to 1782-85 and 1817 A.D., Die-off scars were observed in only one core for each event. X-radiographs and photographs taken under UV-light show the pattern of regrowth and the period taken by the coral to recover. Bioerosion, predominately by boring sponges (Cliona spp.), of the exposed coral surface following the 1782-85 event caused a hiatus of up to 14 years' growth, with the coral taking 7-8 years to reclaim the whole surface contained within the 9-cm-diameter core. Contemporary historical and proxy-climate records indicate that El Niño climatic conditions occurred at the time of both growth discontinuities. Intense luminescence observed in corals growing continuously during the 1817 event suggests that low salinity from river runoff was a contributing factor, analogous environmental conditions to those that were associated with the 1998 bleaching event in the GBR.
dc.publisherSpringer
dc.sourceCoral Reefs
dc.subjectKeywords: coral bleaching; coral reef; El Nino-Southern Oscillation; environmental stress; fluorescence; mortality; paleoecology; paleoenvironment; Australia; Anthozoa; Cliona; Hiatus; Parites; Porites; Scleractinia Bleaching events; Coral luminescence (fluorescence); Coral reef disturbance; ENSO; X-radiographs
dc.titleHistorical mortality in massive Porites from the central Great Barrier Reef, Australia:evidence for past envrironmental stress?
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume22
dc.date.issued2003
local.identifier.absfor040605 - Palaeoclimatology
local.identifier.ariespublicationMigratedxPub5117
local.type.statusPublished Version
local.contributor.affiliationHendy, E, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLough, Janice, Australian Institute of Marine Science
local.contributor.affiliationGagan, Michael, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.startpage207
local.bibliographicCitation.lastpage215
local.identifier.doi10.1007/s00338-003-0304-7
dc.date.updated2015-12-11T09:23:59Z
local.identifier.scopusID2-s2.0-0142028870
CollectionsANU Research Publications

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