Occurrence of the putatively heat-tolerant Symbiodinium phylotype D in high-latitudinal outlying coral communities

Lien, Yi-Ting; Nakano, Yoshikatsu; Plathong, Sakanan; Fukami, Hironobu; Wang, Jih-T.; Chen, C. A.

doi:10.1007/s00338-006-0185-7

Cited by 58 publications

(39 citation statements)

References 40 publications

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“…Prior to bleaching, the randomly sampled and tagged colonies predominantly harboured the thermally sensitive type C 2 symbiont, whilst the remainder harboured a tolerant Symbiodinium type clade D or mixtures of C 2 and D. After bleaching, 71% of the surviving tagged colonies that were initially C 2 predominant changed to D or C1 predominance. Whilst in our study we were not able to measure the different clades in P. damicornis, or in A. intermedia, our results, in combination with those of other researchers (Chen et al, 2005a(Chen et al, ,2005bJones et al, 2008;Keshavmurthy et al, 2014;Lien et al, 2007Lien et al, , 2013 strongly suggest that changes in symbiont type after coral bleaching or severe stress events do occur, and consequently could be accompanied by changes in cellular DMSP concentrations, since different clades contain different levels of DMSP (Deschaseaux et al, 2014b;Steinke et al, 2011). This could be an adaptive response that is related to the antioxidant properties of DMSP, DMS and acrylate that confers thermal tolerance to the coral zooxanthellae because of the ability of these sulphur substances to scavenge ROS levels accumulating intracellularly during coral stress (Deschaseaux et al, 2014a;Jones et al, 2007;Sunda et al, 2002).…”

Section: Coral Stress and The Adaptive Responsecontrasting

confidence: 47%

The effect of coral bleaching on the cellular concentration of dimethylsulphoniopropionate in reef corals

Jones

Fischer

Deschaseaux

et al. 2014

Journal of Experimental Marine Biology and Ecology

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Section: Coral Stress and The Adaptive Responsecontrasting

confidence: 47%

The effect of coral bleaching on the cellular concentration of dimethylsulphoniopropionate in reef corals

Jones

Fischer

Deschaseaux

et al. 2014

Journal of Experimental Marine Biology and Ecology

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“…This has previously only been documented on the cladal level to explain differences in thermal tolerance between corals (e.g., 16,17), with those harboring clade D having an increased thermal tolerance over those with clade C (18,21,33). However, recent reports also show members of clade D in marginal habitats or cooler high-latitude communities (26,(35)(36)(37). These field observations coupled with findings that cultured Symbiodinium of the same clade can respond differently to thermal stress indicates that physiological characteristics are not widespread at the cladal level (25,38).…”

Section: Discussionmentioning

confidence: 96%

Bleaching susceptibility and mortality of corals are determined by fine-scale differences in symbiont type

Sampayo

Ridgway

Bongaerts

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

409

434

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Coral bleaching has been identified as one of the major contributors to coral reef decline, and the occurrence of different symbionts determined by broad genetic groupings (clades A-H) is commonly used to explain thermal responses of reef-building corals. By using Stylophora pistillata as a model, we monitored individual tagged colonies in situ over a two-year period and show that fine level genetic variability within clade C is correlated to differences in bleaching susceptibility. Based on denaturing gradient gel electrophoresis of the internal transcribed spacer region 2, visual bleaching assessments, symbiont densities, host protein, and pulse amplitude modulated fluorometry, we show that subcladal types C78 and C8/a are more thermally tolerant than C79 and C35/a, which suffered significant bleaching and postbleaching mortality. Although additional symbiont types were detected during bleaching in colonies harboring types C79 and C35/a, all colonies reverted back to their original symbionts postbleaching. Most importantly, the data propose that the differential mortality of hosts harboring thermally sensitive versus resistant symbionts rather than symbiont shuffling/switching within a single host is responsible for the observed symbiont composition changes of coral communities after bleaching. This study therefore highlights that the use of broad cladal designations may not be suitable to describe differences in bleaching susceptibility, and that differential mortality results in a loss of both symbiont and host genetic diversity and therefore represents an important mechanism in explaining how coral reef communities may respond to changing conditions. climate change ͉ coral reefs ͉ Symbiodinium ͉ zooxanthellae ͉ Stylophora

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“…The majority of symbiotic algae in marine organisms are dinoflagellates belonging to the genus Symbiodinium, which has been divided into nine distinct clades (A-I) base on molecular phylogenies (Pochon and Gates, 2010). Different lineages in Symbiodinium vary greatly in their geographical distributions (Finney et al, 2010;LaJeunesse et al, 2010), physiological tolerance (Lien et al, 2007), and host specificity (Baker, 2003;Pochon et al, 2006;Yorifuji et al, 2015). Some lineages (e.g., clades A and C) are generalists that occupy a diverse array of hosts from different phyla; others (e.g., clade H) are relatively host-specific (Pochon et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Characterizing Photosymbiosis Between Fraginae Bivalves and Symbiodinium Using Phylogenetics and Stable Isotopes

Volsteadt

Kirkendale

et al. 2018

Front. Ecol. Evol.

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Photosymbiotic associations between heterotrophic hosts and photosynthetic algae play crucial roles in maintaining the trophic and structural integrity of coral reef ecosystems. The marine bivalve subfamily Fraginae contains both non-symbiotic and photosymbiotic lineages, making it an ideal comparative system to study the origin and evolutionary adaptations of photosymbiosis. The symbiotic species exhibit unique morphological adaptations to photosymbiosis. However, the basic biology of these photosymbiotic relationships, such as symbiont diversity and nutritional benefits, has not been thoroughly characterized. In this study, we examined the general morphology of four Fraginae species occupying different depths (0-10 m): Corculum cardissa, Fragum fragum, Fragum scruposum, and Fragum sueziense. Abundant symbionts were found in the mantle, gill, and part of the foot, contained in tubular networks within host tissues. We used molecular phylogenetics to investigate the algal symbiont community of these Fraginae species. Results showed that symbionts from all four species are dinoflagellates belonging to the Symbiodinium clade C and we did not detect any host-specific or geographic-specific genetic structures within the symbionts. We also used stable carbon isotope analyses to examine whether the cockles are directly utilizing photosynthetically derived carbon sources. All species show less depleted 13 C compared to filter-feeding bivalves, suggesting at least part of their organic carbon is derived directly from the symbionts. However, 13 C depletion of Fragum sueziense collected from deeper habitats are less distinguishable from filter-feeding bivalves. This indicates that species in deeper habitats may rely less on photosymbiosis due to the reduced light availability. Given that the symbiotic fragines exhibit varying morphologies, habitats, and utilization of symbiont photosynthesis, the subfamily represents an ideal model system to study differential adaptations to photosymbiosis.

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Occurrence of the putatively heat-tolerant Symbiodinium phylotype D in high-latitudinal outlying coral communities

Cited by 58 publications

References 40 publications

The effect of coral bleaching on the cellular concentration of dimethylsulphoniopropionate in reef corals

The effect of coral bleaching on the cellular concentration of dimethylsulphoniopropionate in reef corals

Bleaching susceptibility and mortality of corals are determined by fine-scale differences in symbiont type

Characterizing Photosymbiosis Between Fraginae Bivalves and Symbiodinium Using Phylogenetics and Stable Isotopes

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