Coral Reefs

, Volume 31, Issue 3, pp 763–763 | Cite as

Raised reef on Larak suggests Acropora dominance on the ‎Persian Gulf coral reefs since the Pleistocene

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We show hitherto undescribed raised coral frameworks exposed at the NE coast of Larak (Iran), a salt diapir island, located in the Strait of Hormuz, Persian Gulf (Fig. 1a). The entire outcropping section is ~7 m thick. At least two fossil reef sequences were recognized, separated by clastic sediment layers: one near mean sea level (MSL) and the other one >4 m above MSL, the upper 2.5 m of which consist mostly of Acropora plates of the clathrata/downingi group (Fig. 1 b–d). Preliminary U/Th, 14C dates are problematic but suggest an upper Pleistocene age ranging from 30 to 150 ka. This is comparable to similar outcrops at nearby Hormoz and Qeshm (Bruthans et al. 2006). Outcrops suggest several consecutive layers of Acropora dominance, comparable to the situation in the modern Gulf until recently, but not yet reported from other known raised deposits in the region (Pirazzoli et al. 2004; Bruthans et al. 2006).
Fig. 1

a Overview of the outcrop. bc Details of Acropora tables in growth position. dAcropora dominance continues to the very top of the section, where it becomes obscured by heavier diagenesis

The Larak outcrop allows us for the first time to clearly establish that Acropora has been a dominant member of Persian Gulf coral assemblages since the Pleistocene. While Acropora remain common in the northern Gulf, rapidly recurring bleaching events caused their abrupt decline in the southern Gulf (Riegl et al. 2011). Their dire situation in the southern Gulf may herald an interruption of long-term ecological persistence of Acropora dominance. This is eerily similar to the situation observed in the Caribbean (Pandolfi and Jackson 2006).


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  1. Bruthans J, Filippi M, Geršl M, Zare M, Melková J, Pazdur A, Bosák P (2006) Holocene marine terraces on two salt diapirs in the Persian Gulf, Iran: age, depositional history and uplift rates. J Quat Sci 21:843–857CrossRefGoogle Scholar
  2. Pandolfi JM, Jackson JBC (2006) Ecological persistence interrupted in Caribbean coral reefs. Ecol Lett 9:818–826PubMedCrossRefGoogle Scholar
  3. Pirazzoli PA, Reyss J-L, Funtugne M, Haghipour A, Hilgers A, Kasper HU, Nazari H, Preusser F, Radtke U (2004) Quaternary coral-reef terraces from Kish and Qeshm Islands, Persian Gulf: new radiometric ages and tectonic implications. Quaternary Int 120:15–27CrossRefGoogle Scholar
  4. Riegl B, Purkis S, Al-Cibahy A, Abdel-Moati M, Hoegh-Guldberg O (2011) Present limits to heat- adaptability in corals and population-level responses to climate extremes. PLoS One 6/9.e24802: 1–8Google Scholar

Copyright information

© The Author(s) 2012

Authors and Affiliations

  1. 1.Netherlands Centre for Biodiversity NaturalisLeidenThe Netherlands
  2. 2.Iranian National Institute for OceanographyTehranIran
  3. 3.National Coral Reef Institute, Oceanographic Center, Nova Southeastern UniversityDania BeachUSA

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