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Coral Reefs of the Chagos Archipelago, Indian Ocean

  • Charles R. C. SheppardEmail author
  • Mebs Ateweberhan
  • Allen C. Chen
  • Alasdair Harris
  • Rachel Jones
  • Shashank Keshavmurthy
  • Carl Lundin
  • David Obura
  • Sam Purkis
  • Peter Raines
  • Bernhard Riegl
  • Michael H. Schleyer
  • Anne L. S. Sheppard
  • Jerker Tamelander
  • John R. Turner
  • Shakil Visram
  • Sung-Yin Yang
Chapter
Part of the Coral Reefs of the World book series (CORW, volume 4)

Abstract

Coral cover throughout the Chagos archipelago is high. Coral and soft coral mortality was very severe in 1998, along with most of the ocean, but there are no direct human impacts so that soft coral and coral cover is as high as it was before the massive mortality episode. There is a very low incidence of coral disease, and there are no recorded marine invasive species, a condition which is unprecedented in coral seas. The area contains between 25 and 50 % of the reefs in the Indian Ocean in very good condition, and the area has the largest contiguous area in the world of reefs in such a state. Reasons for the good condition of Chagos reefs are likely to include remoteness from compounding human activities, but also strongly light adapted ‘Clade A’ zooxanthellae may contribute: these occur in approximately half of the shallow water Acropora colonies which are now recovering strongly. Another contributing factor may be the regular incursions of deep, cool water that rise to cover reefs, including during annual periods of greatest warming. These reefs are viewed as a ‘baseline’ or reference point for many other coral rees in the Indian Ocean.

Keywords

Indian Ocean Coral Cover Ballast Water Soft Coral Invasive Alien Species 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors thank the Administration of the British Indian Ocean Territory for permission to visit the area on various occasions, the military Commanders and personnel for much assistance on site, and to the Officers and crew of the BIOT Patrol Vessel Pacific Marlin for exceptional help on all visits to atolls away from Diego Garcia. The OTEP fund provided core funds for most visits, and all scientists involved received funding from numerous sources to carry out their own programmes of work in the archipelago. Some of this material was published previously in Sheppard et al. (2012) and is reproduced with permission of Wiley & Sons.

References

  1. Ateweberhan M, McClanahan TR, Graham NAJ, Sheppard CRC (2011) Episodic heterogeneous decline and recovery of coral cover in the Indian Ocean. Coral Reefs 30:739–752CrossRefGoogle Scholar
  2. Bax N, Hayes K, Marshall A, Parry D, Thresher R (2002) Man-made marinas as sheltered islands for alien marine organisms: establishment and eradication of an alien invasive marine species. In: Vetich, Clout (eds) 2002. Turning the tide: the eradication of invasives pecies (proceedings of the international conference on eradication of island invasives). Occasional paper of the IUCN Species Survival Commission No. 27Google Scholar
  3. Bax N, Williamson A, Aguero M, Gonzalez E, Geeves W (2010) Marine invasive alien species: a threat to global biodiversity. Mar Policy 27:313–323CrossRefGoogle Scholar
  4. Bayley D (2009) Video analysis of the reef structure and community composition of the Chagos archipelago, British Indian Ocean Territory. M.Sc. thesis, University of Wales, Bangor, 129pGoogle Scholar
  5. Ben-Haim Y, Rosenberg E (2002) A novel Vibrio sp. pathogen of the coral Pocillopora damicornis. Mar Biol 141:47–55CrossRefGoogle Scholar
  6. Bruno JF, Peters LE, Harvell CD, Hettinger A (2003) Nutrient enrichment can increase the severity of coral diseases. Ecol Lett 6:1056–1061CrossRefGoogle Scholar
  7. Bruno JF, Selig ER, Casey KS, Page CA, Willis BL, Harvell CD, Sweatman H, Melendy AM (2007) Thermal stress and coral cover as drivers of coral disease outbreaks. Plos Biol 5:e124CrossRefGoogle Scholar
  8. Burgiel SW, Muir AA (2010) Invasive species, climate change and ecosystem- based adaptation: addressing multiple drivers of global change. Global Invasive Species Programme (GISP), Washington, DC/ NairobiGoogle Scholar
  9. Burke L, Reytar K, Spalding M, Perry A (2011) Reefs at risk revisited. World Resources Institute, Washington, DC, 130ppGoogle Scholar
  10. Carlton JT, Ruiz GM (2005) Vector science and integrated vector management in bioinvasion ecology: conceptual frameworks. In: Mooney HA, Mack RN, McNeely JA et al (eds) Invasive alien species: a new synthesis. Island Press, Washington, DCGoogle Scholar
  11. Carpenter K et al (2008) One-third of reef-building corals face elevated extinction risk from climate change and local impacts. Science 321:560–563Google Scholar
  12. Cohen AN, Carlton JT (1998) Accelerating invasion rate in a highly invaded estuary. Science 279:55–58Google Scholar
  13. Coles SL, DeFelice RC, Eldredge LG, Carlton JT (1999) Historical and recent introductions of non- indigenous marine species into Pearl Harbor, Oahu, Hawaiian Islands. Mar Biol 135:147–158CrossRefGoogle Scholar
  14. Concepcion G, Kahng SE, Crepeau M, Franklin EC, Coles S, Toonen RJ (2010) Resolving natural ranges and marine invasions in a globally distributed octocoral (genus Carijoa). Mar Ecol Prog Ser 401:113–127CrossRefGoogle Scholar
  15. Diaz M, Madin J (2011) Macroecological relationships between coral species’ traits and disease potential. Coral Reefs 30:73–84CrossRefGoogle Scholar
  16. Harris AR (2010) Analysis of recovery patterns of Indian Ocean coral reefs through examination of scleractinian communities and populations. Ph.D. thesis, University of Warwick, 273ppGoogle Scholar
  17. Harris A, Sheppard CRC (2008) Status and recovery of the coral reefs of the Chagos archipelago, British Indian Ocean Territory. In: Obura D, Souter D, Linden O (eds) Indian Ocean coral reefs. CORDIO, Kalmar University, Sweden, pp 61–69Google Scholar
  18. Harvell D, Jordán-Dahlgren E, Merkel S, Rosenberg E, Raymundo L, Smith G, Weil E, Willis B (2007) Coral disease, environmental drivers, and the balance between coral and microbial associates. Oceanography 20:172–195CrossRefGoogle Scholar
  19. Hewitt CL, Martin RB, Centre for Research on Introduced Marine Pests (2001) Revised protocols for baseline port surveys for introduced marine species: survey design, sampling protocols and specimen handling, vol 22, CRIMP Technical Report. CSIRO Marine Research, HobartGoogle Scholar
  20. Hewitt CL, Campbell ML, Thresher RE, Martin RB, Boyd S, Cohen BF, Currie DR, Gomon MF, Keough MJ, Lewis JA, Lockett MM, Mays N, McArthur MA, O’Hara TD, Poore GCB, Ross DJ, Sotrey MJ, Watson JE, Wilson RS (2004) Introduced and cryptogenic species in Port Philip Bay, Victoria, Australia. Mar Biol 144:183–202CrossRefGoogle Scholar
  21. Heywood V (ed) (1995) Global biodiversity assessment. Cambridge University Press, CambridgeGoogle Scholar
  22. Hobbs JPA, Frisch AJ (2010) Coral disease in the Indian Ocean: taxonomic susceptibility, spatial distribution and the role of host density on the prevalence of white syndrome. Dis Aquat Organ 89:1–8CrossRefGoogle Scholar
  23. Hoegh-Guldberg O, Mumby PJ, Hooten AJ, Steneck RS, Greenfield P, Gomez E, Harvell CD, Sale PF, Edwards AJ, Caldeira K, Knowlton N, Eakin CM, Iglesias-Prieto R, Muthiga N, Bradbury RH, Dubi A, Hatziolos ME (2007) Coral reefs under rapid climate change and ocean acidification. Science 318:1737–1742CrossRefGoogle Scholar
  24. Hughes TP, Graham NAJ, Jackson JBC, Mumby PJ, Steneck RS (2010) Rising to the challenge of sustaining coral reef resilience. Trends Ecol Evol 25:633–642CrossRefGoogle Scholar
  25. IMO (2004) International convention for the control and management of Ships’ Ballast Water & Sediments. Adopted by consensus in London on Friday 13 Feb 2004, not in force (May 2011)Google Scholar
  26. Kaczmarsky L, Richardson LL (2011) Do elevated nutrients and organic carbon on Philippine reefs increase the prevalence of coral disease? Coral Reefs 30:253–257CrossRefGoogle Scholar
  27. Lesser MP, Bythell John C, Gates Ruth D, Johnstone Ron W, Hoegh-Guldberg O (2007) Are infectious diseases really killing corals? Alternative interpretations of the experimental and ecological data. J Exp Mar Biol Ecol 346:36–44CrossRefGoogle Scholar
  28. McGeoch MA, Butchart Stuart HM, Dian S, Elrike M, Kleynhans Elizabeth J, Andy S, Janice C, Michael H (2010) Global indicators of biological invasion: species numbers, biodiversity impact and policy responses. Divers Distrib 16:95–108CrossRefGoogle Scholar
  29. Miller J, Muller E, Rogers C, Waara R, Atkinson A, Whelan KRT, Patterson M, Witcher B (2009) Coral disease following massive bleaching in 2005 causes 60% decline in coral cover on reefs in the US Virgin Islands. Coral Reefs 28:925–937CrossRefGoogle Scholar
  30. Molnar JL, Gamboa RL, Revenga C, Spalding MD (2008) Assessing the global threat of invasive species to marine biodiversity. Front Ecol Environ 6:485–492CrossRefGoogle Scholar
  31. Mora C, Aburto-Oropeza O, Ayala Bocos A, Ayotte PM, Banks S et al (2011) Global human footprint on the linkage between biodiversity and ecosystem functioning in reef fishes. PLoS Biol 9(4):e1000606. doi: 10.1371/journal.pbio.1000606 CrossRefGoogle Scholar
  32. Muthiga N, Costa A, Motta H, Muhando C, Mwaipopo R, Schleyer M (2008) Status of coral reefs in East Africa: Kenya, Tanzania, Mozambique and South Africa. In: Wilkinson C (ed) Status of coral reefs of the world: 2008. Global Coral Reef Monitoring Network and Reef and Rainforest Research Center, Townsville, pp 91–104Google Scholar
  33. O’Farrell S (2007) Competition and aggression between scleractinian corals and macroalgae on post-disturbance reefs in the Chagos archipelago. M.Sc. thesis University of Wales, Bangor, 58pGoogle Scholar
  34. Pomeroy RS, Parks JE, Watson IM (2004) How is your MPA doing? A guidebook of natural and social indicators for evaluating marine protected area management effectiveness. IUCN, Gland/ Cambridge, UK,xvi + 216 ppCrossRefGoogle Scholar
  35. Pratchett MS, Graham NAJ, Sheppard CRC, Mayes B (2010) Are infestations of Cymo melanodactylus killing Acropora cytherea in the Chagos archipelago? Coral Reefs 29:941CrossRefGoogle Scholar
  36. Rajasuriya A, Zahir H, Venkataraman K, Islam Z, Tamelander J (2004) Status of coral reefs in South Asia: Bangladesh, Chagos, India, Maldives and Sri Lanka. In: Wilkinson C (ed) Status of coral reefs of the world: 2004, vol 1. Australian Institute of Marine Science, Townsville, pp 213–234, 301pGoogle Scholar
  37. Raymundo LJ, Rosell KB, Kaczmarsky L, Reboton C (2005) Coral diseases on Philippine reefs: Genus Porites is a dominant host. Dis Aquat Organ 64:181–191CrossRefGoogle Scholar
  38. Reinicke GB, van Ofwegen LP (1999) Soft corals (Alcyonacea: Octocorallia) from shallow water in the Chagos archipelago: species assemblages and their distribution. In: Sheppard CRC, Seaward MRD (eds) Ecology of the Chagos archipelago, vol 2, Linnean Society Occasional Publications. Westbury for the Linnean Society of London, London, pp 67–90Google Scholar
  39. Riegl B, Piller WE (2003) Possible refugia for reefs in times of environmental stress. Int J Earth Sci 92:520–531CrossRefGoogle Scholar
  40. Riegl B, Sheppard CRC, Purkis SJ (2012) Human impact on atolls leads to coral loss and community homogenisation: a modeling study. PLoS One 7:e36921CrossRefGoogle Scholar
  41. Rohwer F, Kelley S (2004) Culture-independent analyses of coral-associated microbes. In: Loya Y, Rosenberg E (eds) Coral health and disease. Springer, Berlin, pp 265–277CrossRefGoogle Scholar
  42. Ruiz GM, Rawlings TK, Dobbs FC, Drake LA, Mullady T, Huq A, Colwell RR (2000) Global spread of microorganisms by ships. Ballast water discharged from vessels harbours a cocktail of potential pathogens. Nature 408:49–50CrossRefGoogle Scholar
  43. Schleyer MH, Benayahu Y (2010) Pre- and post-1998 ENSO records of shallow-water octocorals (Alcyonacea) in the Chagos archipelago. Mar Pollut Bull 60:2197–2200CrossRefGoogle Scholar
  44. Sheppard CRC (1980) Coral cover, zonation and diversity on reef slopes of Chagos atolls, and population structures of the major species. Mar Ecol Prog Ser 2:193–205CrossRefGoogle Scholar
  45. Sheppard CRC (1999a) Changes in coral cover on reefs of Chagos over eighteen years. In: Sheppard CRC, Seaward MRD (eds) Ecology of the Chagos archipelago. Linnean Society/Westbury, London, p 91Google Scholar
  46. Sheppard CRC (1999b) Coral decline and weather patterns over 20 years in the Chagos archipelago, central Indian Ocean. Ambio 28:472–478Google Scholar
  47. Sheppard CRC (2003) Predicted recurrences of mass coral mortality in the Indian Ocean. Nature 425:294–297CrossRefGoogle Scholar
  48. Sheppard CRC (2006) Longer term impacts of climate change. In: Cote I, Reynolds J (eds) Coral reef conservation. Cambridge University Press, New York, pp 264–290CrossRefGoogle Scholar
  49. Sheppard CRC (2009) Large temperature plunges recorded by data loggers at different depths on an Indian Ocean atoll: comparison with satellite data and relevance to coral refuges. Coral Reefs 28:399–403CrossRefGoogle Scholar
  50. Sheppard CRC et al (2012) Reefs and islands of the Chagos archipelago, Indian Ocean: why it is the world’s largest no-take marine protected area. Aquatic Conservation Mar Freshw Ecosyst 22:232–261Google Scholar
  51. Sheppard CRC, Spalding MD, Bradshaw C, Wilson S (2002) Erosion vs recovery of coral reefs after 1998 El Nino: Chagos reefs, Indian Ocean. Ambio 31:40–48Google Scholar
  52. Sheppard CRC, Harris A, Sheppard ALS (2008) Archipelago-wide coral recovery patterns since 1998 in the Chagos archipelago, central Indian Ocean. Mar Ecol Prog Ser 362:109–117CrossRefGoogle Scholar
  53. Spalding MD, Ravilious C, Green EP (2001) World atlas of coral reefs. University of California Press, Berkely, 424ppGoogle Scholar
  54. Stoddart D R, Taylor DL (eds) (1971) Geology and ecology of Diego Garcia Atoll, Chagos Archipelago. Atoll Res Bull 149:237ppGoogle Scholar
  55. Tamelander J, Rajasuria A (2008) Status of coral reefs in South Asia: Bangladesh, Chagos, India, Maldives and Sri Lanka. In: Wilkinson C (ed) Status of coral reefs of the world: 2008. Global Coral Reef Monitoring Network and Reef and Rainforest Research Center, Townsville, pp 119–130Google Scholar
  56. Tamelander J, Campbell M, Lundin CG (2009) Detecting bioinvasions on small islands in the Indian Ocean – project completion report. IUCN Global Marine Programme 2009. IUCN, GlandGoogle Scholar
  57. Thresher RE, Kuris AM (2004) Options for managing invasive marine species. Biol Invasions 6:295–300CrossRefGoogle Scholar
  58. Tu M (2009) Assessing and managing invasive species within protected areas. In: Ervin J (ed) Protected area quick guide series. The Nature Conservancy, Arlington, p 36Google Scholar
  59. Weil E, Urreiztieta I, Garzon-Ferreira J (2002) Geographic variability in the incidence of coral and octocoral diseases in the wider Caribbean. In: Proceedings of the 9th international coral reef symposium, vol 2, Bali, pp 1231–1237Google Scholar
  60. Weil E, Smith GW, Gil-Agudelo DL (2006) Status and progress in coral reef disease research. Dis Aquat Organ 60:1–7CrossRefGoogle Scholar
  61. Wilcove DS, Rothstein D, Dubow J, Phillips A, Losos E (1998) Quantifying threats to imperiled species in the United States. Bioscience 48:607–615CrossRefGoogle Scholar
  62. Wilkinson C (ed) (2008) Status of coral reefs of the world: 2008. Global Coral Reef Monitoring Network and Reef and Rainforest Research Center, Townsville, p 296Google Scholar
  63. Williams GJ, Davy SK, Aeby GS (2007) Coral disease at Palmyra Atoll, a remote reef system in the Central Pacific. Coral Reefs 27:207CrossRefGoogle Scholar
  64. Willis B, Page C, Dinsdale E (2004) Coral diseases on the great barrier reef. In: Loya Y, Rosenberg E (eds) Coral health and disease. Springer, Berlin, pp 69–104CrossRefGoogle Scholar
  65. Yang SY, Keshavmurthy S, Obura D, Sheppard CRC, Visram S, Chen CA (2012) Diversity and distribution of Symbiodinium associated with seven common coral species in the Chagos archipelago, Central Indian Ocean. PlosOne 7(e35836):9Google Scholar
  66. Zvuloni A, Artzy-Randrup Y, Stone L, Kramarsky-Winter E, Barkan R, Loya Y (2009) Spatio-temporal transmission patterns of black-band disease in a coral community. PlosONE 4:e4993Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Charles R. C. Sheppard
    • 1
    Email author
  • Mebs Ateweberhan
    • 1
  • Allen C. Chen
    • 3
  • Alasdair Harris
    • 2
  • Rachel Jones
    • 4
  • Shashank Keshavmurthy
    • 3
  • Carl Lundin
    • 5
  • David Obura
    • 6
  • Sam Purkis
    • 7
  • Peter Raines
    • 8
  • Bernhard Riegl
    • 7
  • Michael H. Schleyer
    • 9
  • Anne L. S. Sheppard
    • 1
  • Jerker Tamelander
    • 10
  • John R. Turner
    • 11
  • Shakil Visram
    • 3
  • Sung-Yin Yang
    • 3
  1. 1.School of Life SciencesUniversity of WarwickCoventryUK
  2. 2.Omnibus Business CentreLondonUK
  3. 3.Biodiversity Research CentreAcademia SinicaNankangTaiwan
  4. 4.Zoological Society of LondonLondonUK
  5. 5.IUCN Marine ProgrammeGlandSwitzerland
  6. 6.CORDIO East AfricaMombasaKenya
  7. 7.National Coral Reef InstituteNova Southeastern University, Oceanographic CenterDania BeachUSA
  8. 8.LondonUK
  9. 9.Oceanographic Research InstituteDurbanSouth Africa
  10. 10.UNEP Division of Environmental Policy Implementation, UNBangkokThailand
  11. 11.School of Ocean SciencesBangor UniversityAngleseyUK

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