Mesoamerican Orbicella faveolata stable isotope records 1922-2006 AD Carilli, J.E.; Charles, C.D.; Garren, M.; McField, M.; Norris, R.D. Carilli, J.E. Charles, C.D. Garren, M. McField, M. Norris, R.D. earth science/paleoclimate/corals and sclerosponges (delta 18O,Orbicella faveolata,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges (age,null,null,year Common Era,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (delta 13C,Orbicella faveolata,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (Frank's Caye, NE Buoy, Sapodilla Cayes>LATITUDE 16.129167>LONGITUDE -88.249722) (Harry Jones, Turneffe Atoll>LATITUDE 17.306944>LONGITUDE -87.801111) (Diamond Caye, Utila>LATITUDE 16.064444>LONGITUDE -86.950833) (Pelican Point, Peli 2, Cayos Cochinos>LATITUDE 15.978056>LONGITUDE -86.485) Decades-long records of the stable isotopic composition of coral skeletal cores were analyzed from four sites on the Mesoamerican Reef. Two of the sites exhibited baseline shifts in oxygen isotopic composition after known coral bleaching events. Changes in pH at the calcification site caused by a change in the associated symbiont community are invoked to explain the observed shift in the isotopic composition. To test the hypothesis that changes in symbiont clade could affect skeletal chemistry, additional coral samples were collected from Belize for paired Symbiodinium identification and skeletal stable isotopic analysis. We found some evidence that skeletal stable isotopic composition may be affected by symbiont clade and suggest this is an important topic for future investigation. If different Symbiodinium clades leave consistent signatures in skeletal geochemical composition, the signature will provide a method to quantify past symbiont shuffling events, important for understanding how corals are likely to respond to climate change. STUDY NOTES: Errors on Orbicella faveolata measurements: d18O = 0.11 per mil, d13C 0.066 per mil. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Carilli, J.E. Investigator : Charles, C.D. Investigator : Garren, M. Investigator : McField, M. Investigator : Norris, R.D. 2014-10-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17378 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-hmf-1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-cmf-4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-umf-6.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-smf-1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-hmf-1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-cmf-4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-umf-6.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-smf-1.txt English https://www.ncdc.noaa.gov/paleo/study/17378 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-hmf-1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-cmf-4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-umf-6.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/caribbean/carilli2013/carilli2013-smf-1.txt Carilli, J.E., C.D. Charles, M. Garren, M. McField, and R.D. Norris2013Baseline shifts in coral skeletal oxygen isotopic composition: a signature of symbiont shuffling?Coral Reefs322559-57110.1007/s00338-012-1004-y START YEAR: 1922 AD * END YEAR: 2006 AD -88.249722 15.978056 -86.485 17.306944