Coral Reefs

, Volume 27, Issue 4, pp 783–786 | Cite as

The effect of temperature on larval pre-settlement duration and metamorphosis for the sponge, Rhopaloeides odorabile

Note

Abstract

Rising sea temperatures may potentially affect the dispersive larval phase of sessile marine invertebrates with consequences for the viability of adult populations. This study demonstrated that the planktonic larvae of Rhopaloeides odorabile, a common Great Barrier Reef sponge, survived and metamorphosed when exposed to temperatures up to 9°C above the annual maximum (~29°C). Planktonic larval duration of 54 h, at ambient temperatures (~28°C), were reduced to 18 h for larvae exposed to elevated temperatures (32–36°C). Moreover, at ambient temperatures larvae began metamorphosing after 12 h, but at 32–36°C this reduced to only 2 h. Larvae survived and could still metamorphose at temperatures as high as 38°C, but were no longer functional at 40°C. These results imply that predicted increases in sea surface temperature may reduce planktonic larval duration and dispersal capabilities, thereby contributing to population subdivision of the species.

Keywords

Sessile marine invertebrates Larval settlement Thermal-tolerance Thermal-stress Climate Sponge 

Notes

Acknowledgements

We thank D. Cocker and A. M. Lynch for assisting in sample collections and laboratory work.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.School of Marine & Tropical BiologyJames Cook UniversityTownsvilleAustralia
  2. 2.AIMS@JCU Tropical AquacultureJames Cook UniversityTownsvilleAustralia

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