Thermal thresholds for coral bleaching in the Indian seas

Vivekanandan, E and Hussain Ali, M and Jasper, B and Rajagopalan, M (2008) Thermal thresholds for coral bleaching in the Indian seas. Journal of the Marine Biological Association of India, 50 (2). pp. 209-214.


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    To find out the thermal threshold for coral bleaching, sea surface temperature (SST) data prior to, during and after the 1998 coral bleaching events in the Andaman Sea, Nicobar Sea, Lakshadweep Sea, Gulf of Mannar and Gulf of Kachchh obtained from NOAA/NASA satellite were plotted. From these plots, the Degree Heating Month (DHM) accumulations of the SST hotspot anomalies were estimated. The warming during the years 1985-2005 was correlated with Multivariate El Nino/Southern Oscillation Index (MEI). The results show increase in SST and MEI in all the five regions during the years of strong El Nino events. Coral bleaching occurred when the summer SST maxima exceeded 31oC and remained high for more than 30 days. The indices on thermal thresholds and DHMs estimated in this analysis can lead into projections on coral vulnerability to thermal stress in future in the Indian seas.

    Item Type: Article
    Uncontrolled Keywords: Coral bleaching; thermal threshold; Degree Heating Months
    Subjects: Marine Ecosystems > Coral Reefs > Bleaching
    Marine Ecosystems > Coral Reefs
    Divisions: CMFRI-Kochi > Marine Biodiversity Division
    Subject Area > CMFRI > CMFRI-Kochi > Marine Biodiversity Division
    CMFRI-Kochi > Marine Biodiversity Division
    Subject Area > CMFRI-Kochi > Marine Biodiversity Division
    Depositing User: Dr. V Mohan
    Date Deposited: 09 Aug 2010 11:43
    Last Modified: 09 Sep 2015 15:15

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