Coral reef recovery status in south Andaman Islands after the bleaching event 2010
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The Andaman and Nicobar Islands are one of the Union Territories of India, located in the eastern part of the Bay of Bengal. In 2010 summer, the increment in sea surface water temperature (up to 34°C) resulted in the bleaching of about 74% to 77% of corals in the South Andaman. During this event, coral species such as Acropora cerealis, A. humilis, Montipora sp., Favia pallida, Diploastrea sp., Goniopora sp. Fungia concinna, Gardineroseries sp., Porites sp., Favites abdita and Lobophyllia robusta were severely affected. This study is to assess the recovery status of the reef ecosystem by estimating the percentage of Live Coral cover, Bleached coral cover, Dead coral with algae, Rubble, Sandy flat, Algal assemblage and other associated organisms. The sedimentation rate (mg cm−2 d−1) and coral coverage (%) were assessed during this study period. The average sedimentation rate was ranged between 0.27 and 0.89 mg cm−2 d−1. The observed post bleaching recovery of coral cover was 21.1% at Port Blair Bay and 13.29% at Havelock Island. The mortality rate of coral cover due to this bleaching was estimated as 2.05% at Port Blair Bay and 9.82% at Havelock Island. Once the sea water temperature resumed back to the normal condition, most of the corals were found recovered.
Key wordscoral reef coral recovery coral bleaching sea surface temperature
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- Arthur, R., 2000. Coral bleaching and mortality in three Indian reef regions during an El Niño Southern Oscillation event. Current Science, 79(12): 1723–1728.Google Scholar
- Cook, N., and Tao, E. K., 2010. Coral bleaching report. http://-www.coralwatch.org/c/document_library/get_file?uuid=899a9fc0-215a-4386-a58e-adc88a378a9d&groupId=10136.
- Eakin, M., 2010. 2010 is bad year for coral reefs around the world. http://earthsky.org/biodiversity/mark-eakin-warm-oceans-causing-worldwide-coral-bleaching-in-2010.
- English, S., Wilkinson, C., and Baker, V. 1997. Survey Manual for Tropical Marine Resource. Australian Institute of Marine Sciences, Townsville, Australia, 390pp.Google Scholar
- IMD, 2010. Report on Rainfall Data for the Year 2010. India Meteorological Department, Port Blair, India, 12pp.Google Scholar
- Klinthong, W., and Yeemin, T., 2011. An analysis of in situ seawater temperature measurement at Similan Island during the 2010 coral bleaching event. 37th Congress on Science and Technology of Thailand, Bangkok, Thailand, 1–5.Google Scholar
- Krishnan, P., Roy, D. S., George, G., Srivastava, R. C., Anand, A., Murugesan, S., Kaliyamoorthy, M., Vikas, N., and Soundararajan, R., 2011. Elevated sea surface temperature during May 2010 induces mass bleaching of corals in the Andaman. Current Science, 100(1):111–117.Google Scholar
- Kumaraguru, A. K., 2000. Coral reefs in the Gulf of Mannar and the conservation strategies required. Ecology, Environment and Conservation, 6(1): 1–12.Google Scholar
- Kumaraguru, A. K., Jeyakumar, K., and Ramakritinan, C. M., 2003. Coral bleaching 2002 in the Palkbay, Southeast Coast of India. Current Science, 85(12): 1787–1793.Google Scholar
- Marimuthu, N., Dharani, G., Vinithkumar, N. V., Vijayakumaran, M., and Kirubagaran, R., 2011. Recovery status of sea anemones from bleaching event of 2010 in the Andaman waters. Current Science, 101(6): 734–736.Google Scholar
- NOAA., 2011. Report on Sea Surface Temperature Through National Environmental Satellite, Data and Information Service. http://www.ospd.noaa.gov/ml/ocean/sst/anomaly_2010.html.
- Ravindran, J., Raghukumar, C., and Raghukumar, S., 1999. Disease and stress-induced mortality of corals in Indian reefs and observations on bleaching of corals in the Andamans. Current Science, 76(2): 233–237.Google Scholar
- Sukresno, B., 2010. Empirical Orthogonal Functions (EOF) analysis of SST variability in Indonesian water concerning with ENSO and IOD. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Science, 38(8): 116–121.Google Scholar
- Suresh, V. R., 1991. Studies on the coral reefs of Lakshadweep. Ph.D. Thesis. Cochin University of Science and Technology, India.Google Scholar
- Turner, J. R., Vousden, D., Klaus, R., Satyanarayana, C., Fenner, D., Venkataraman, K., Rajan, P. T., and Subba Rao, N. V., 2001. Remote sensing and rapid site assessment survey. In: Coral Reef Systems of the Andaman Island. Government of India and United Nations Development Programme, Global Environment Facility, 76pp.Google Scholar
- Wafar, M. V. M., 1990. Global warming and coral reefs. In: Sea Level Variation and Its Impact on Coastal Environment. Tamil University Publication, Tamilnadu, 131: 411–432.Google Scholar
- Wilson, J. J., Marimuthu, N., and Kumaraguru, A. K., 2005. Sedimentation of silt in the coral reef environment of southeast coast of India. Journal of Marine Biological Association of India, 47(1): 83–87.Google Scholar