Most Low-Abundance "Background" Symbiodinium spp. Are Transitory and Have Minimal Functional Significance for Symbiotic Corals

Microbial Ecology
Moo Joon LeeTodd C LaJeunesse

Abstract

Speculation surrounds the importance of ecologically cryptic Symbiodinium spp. (dinoflagellates) that occur at low abundances in reef-building corals and in the surrounding environment. Evidence acquired from extensive sampling, long-term monitoring, and experimental manipulation can allow us to deduce the ecology and functional significance of these populations and whether they might contribute to the response of coral-dinoflagellate mutualisms to climate change. Quantitative PCR was used here to diagnose the prevalence, seasonal variation, and abundances of Symbiodinium spp. within and between colonies of the coral, Alveopora japonica. Consistent with broader geographic sampling, only one species comprised 99.9 %, or greater, the population of symbionts in every sample. However, other Symbiodinium including the non-mutualistic species, Symbiodinium voratum, were often detected, but at estimated cell densities thousands-fold less than the dominant symbiont. The temporal variation in prevalence and abundances of these "background" Symbiodinium could not be definitively related to any particular environmental factor including seasonality and water chemistry. The prevalence (proportion detected among host samples), but not abunda...Continue Reading

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Citations

Nov 22, 2017·Proceedings of the National Academy of Sciences of the United States of America·Jennifer L MatthewsSimon K Davy
Dec 2, 2017·The ISME Journal·Maren ZieglerChristian R Voolstra
Jun 27, 2018·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Neil W Blackstone, Jeff M Golladay
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Jun 18, 2020·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Christian R Voolstra, Maren Ziegler
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Mar 13, 2020·Scientific Reports·Danielle C ClaarJulia K Baum
Dec 10, 2020·Nature Communications·Danielle C ClaarJulia K Baum
Aug 28, 2017·Trends in Ecology & Evolution·David J SuggettWilliam Leggat

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