Coral Reefs

, Volume 29, Issue 3, pp 631–636 | Cite as

Plasticity of larval pre-competency in response to temperature: observations on multiple broadcast spawning coral species

Note

Abstract

The pre-competency period of coral larvae influences dispersal, and this may be affected under projected climate change conditions. In this laboratory study, we examined the influence of sea water temperature on the duration of pre-competency of larvae of four broadcast spawning coral species. Fungia repanda, Acropora millepora, A. spathulata and Symphyllia recta larvae demonstrated large differences in cohort competency levels when cultured over a 4°C range during the first 4 days post fertilisation. Warmer temperatures reduced pre-competency periods by at least a day for all species, but there were also indications of an upper temperature threshold of less than 32°C for the development of F. repanda, A. millepora and S. recta. These data suggest a general flexibility in ontogenic response to ambient water temperatures. Sea surface temperatures (SST) that differ at spawning time by as little as 2°C, due to inter-annual or latitudinal variation, are likely to alter coral larval dispersal ranges. In some locations, notably the central Indo-Pacific, where major coral spawning activity can coincide with seasonal SST maxima, a future 2°C increase due to climate change may have serious negative effects on coral development and distribution.

Keywords

Coral Larva Climate Global warming Development Metamorphosis Settlement 

Notes

Acknowledgments

Research of AJH supported by a fellowship from the Japanese Ministry of Science, Education, Culture and Sports (Foreign Visiting Professor) at the Tropical Biosphere Research Center Sesoko Station, University of the Ryukyus, and in part by the Global Environmental Facility and the World Bank through the Coral Reef Targeted Research and Capacity Building for Management program, Restoration and Remediation working group. He is grateful to Professors Y. Loya and K. Sakai for access to spawning fungiid corals and to N. Namizaki and H. Yamamoto for their help with the field work.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Australian Institute of Marine ScienceCrawleyAustralia
  2. 2.Australian Institute of Marine ScienceTownsvilleAustralia

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