Variation in symbiont distribution between closely related coral species over large depth ranges

Molecular Ecology
P R FradeRolf P M Bak

Abstract

Symbiotic algae in coral species distributed over a large depth range are confronted with major differences in light conditions. We studied the genetic variation of Symbiodinium in the coral genus Madracis over depth (5-40 m) and at two different colony surface positions. Using polymerase chain reaction-denaturing gradient gel electrophoresis ITS2 nuclear ribosomal DNA analyses, we consistently identified three symbiont genotypes with distributions that reveal patterns of host specificity and depth-based zonation. ITS2 type B7 Symbiodinium is the generalist type, occurring in all zooxanthellate Madracis corals and at all depths. Type B13 is restricted to the shallow water specialist Madracis mirabilis. Type B15 is typical of deep reef environments and replaces B7 in the depth generalist Madracis pharensis. Contrasting with variation over depth, we found strong functional within-colony uniformity in symbiont diversity. Relating symbiont distributions to measured physical factors (irradiance, light spectral distribution, temperature), suggests depth-based ecological function and host specificity for Symbiodinium ITS2 types, even among closely related coral species.

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Citations

Oct 22, 2010·The ISME Journal·Chung-Pin ChenSen-Lin Tang
Nov 26, 2010·Proceedings. Biological Sciences·Timothy F CooperMadeleine J H Van Oppen
Jun 4, 2011·PloS One·Timothy F CooperMadeleine J H van Oppen
Sep 10, 2014·Frontiers in Microbiology·Melissa S Roth
Nov 3, 2016·Scientific Reports·Eugenia M SampayoSophie Dove
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May 17, 2008·Molecular Ecology·Iliana B Baums
Jan 15, 2009·Molecular Ecology·Loren RiesebergNolan Kane
Feb 13, 2010·Molecular Ecology·M K DeSalvoM Medina
Apr 21, 2010·FEMS Microbiology Ecology·Julie B Olson, Christina A Kellogg
Jun 13, 2015·Royal Society Open Science·Pim BongaertsOve Hoegh-Guldberg
May 28, 2014·Molecular Ecology·Carlos PradaMary Alice Coffroth
Sep 27, 2014·Photosynthesis Research·C Ferrier-PagèsF Gévaert
Nov 4, 2020·Microorganisms·Aurélie BoilardNicolas Derome
Aug 20, 2021·Frontiers in Microbiology·Constanza SchapheerRosa Scherson
Sep 25, 2010·Molecular Phylogenetics and Evolution·P R FradeR P M Bak

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