Title

Corals from the Persian/Arabian Gulf as Models for Thermotolerant Reef-Builders: Prevalence of Clade C3 Symbiodinium, Host Fluorescence and Ex Situ Temperature Tolerance

Document Type

Article

Publication Date

7-30-2013

Publication Title

Marine Pollution Bulletin

Keywords

Coral reefs, Global warming, Bleaching, Zooxanthellae, Green fluorescent protein, Heat stress

ISSN

0025-326X

Volume

72

Issue/No.

2

First Page

313

Last Page

322

Abstract

Corals in the Arabian/Persian Gulf endure summer temperatures of up to 36 °C, making them ideal subjects to study the mechanisms underlying thermal tolerance. Unexpectedly, we found the “generalist” Symbiodinium clade C3 to be the prevalent symbiont among seven coral species from Abu Dhabi (UAE) waters. Moreover, C3 represented the only dominant symbiont type in Porites spp. from this region. The “thermotolerant” symbionts D1a and C15 were not encountered, indicating that the association with these symbionts cannot be the sole reason for the heat tolerance of Gulf corals. The association of Porites lobata with specific symbiont types (C3 vs. C15) in samples from habitats with very different temperature regimes (Abu Dhabi vs. Fiji) remained unaffected by laboratory culture. During temperature stress experiments specimens from both locations strongly downregulated green fluorescent protein (GFP)-like pigments. However, the Abu Dhabi samples were less prone to bleaching and showed lower mortality.

Comments

©2012 Published by Elsevier Ltd.

Additional Comments

Deutsche Forschungsgemeinschaft grant #s: DFG Wi1990/2-1; NERC grant #s: NE/H012303/1, NE/I01683X/1; ERC grant #: 311179

ORCID ID

0000-0002-6003-9324

ResearcherID

F-8807-2011

DOI

10.1016/j.marpolbul.2012.11.032

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