Effects of Thermal Stress on Amount, Composition, and Antibacterial Properties of Coral Mucus

Overview

Journal PeerJ

Specialties Biology
Environmental Health
General Medicine

Date 2019 May 21

PMID 31106065

Citations 9

Authors

Rachel M Wright

Marie E Strader

Heather M Genuise

Mikhail Matz

Affiliations

Soon will be listed here.

Abstract

The surface mucus layer of reef-building corals supports feeding, sediment clearing, and protection from pathogenic invaders. As much as half of the fixed carbon supplied by the corals' photosynthetic symbionts is incorporated into expelled mucus. It is therefore reasonable to expect that coral bleaching (disruption of the coral-algal symbiosis) would affect mucus production. Since coral mucus serves as an important nutrient source for the entire reef community, this could have substantial ecosystem-wide consequences. In this study, we examined the effects of heat stress-induced coral bleaching on the composition and antibacterial properties of coral mucus. In a controlled laboratory thermal challenge, stressed corals produced mucus with higher protein ( = 2.1, < 0.001) and lipid content ( = 15.7, = 0.02) and increased antibacterial activity (likelihood ratio = 100, < 0.001) relative to clonal controls. These results are likely explained by the expelled symbionts in the mucus of bleached individuals. Our study suggests that coral bleaching could immediately impact the nutrient flux in the coral reef ecosystem via its effect on coral mucus.

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References

Pfaffl M . A new mathematical model for relative quantification in real-time RT-PCR. Nucleic Acids Res. 2001; 29(9):e45. PMC: 55695. DOI: 10.1093/nar/29.9.e45. View

Wild C, Huettel M, Klueter A, Kremb S, Rasheed M, Jorgensen B . Coral mucus functions as an energy carrier and particle trap in the reef ecosystem. Nature. 2004; 428(6978):66-70. DOI: 10.1038/nature02344. View

Bruno J, Selig E, Casey K, Page C, Willis B, Harvell C . Thermal stress and coral cover as drivers of coral disease outbreaks. PLoS Biol. 2007; 5(6):e124. PMC: 1865563. DOI: 10.1371/journal.pbio.0050124. View

Allers E, Niesner C, Wild C, Pernthaler J . Microbes enriched in seawater after addition of coral mucus. Appl Environ Microbiol. 2008; 74(10):3274-8. PMC: 2394949. DOI: 10.1128/AEM.01870-07. View

Shnit-Orland M, Kushmaro A . Coral mucus-associated bacteria: a possible first line of defense. FEMS Microbiol Ecol. 2009; 67(3):371-80. DOI: 10.1111/j.1574-6941.2008.00644.x. View

Nissimov J, Rosenberg E, Munn C . Antimicrobial properties of resident coral mucus bacteria of Oculina patagonica. FEMS Microbiol Lett. 2009; 292(2):210-5. DOI: 10.1111/j.1574-6968.2009.01490.x. View

Palmer C, Bythell J, Willis B . Levels of immunity parameters underpin bleaching and disease susceptibility of reef corals. FASEB J. 2010; 24(6):1935-46. DOI: 10.1096/fj.09-152447. View

Littman R, Bourne D, Willis B . Responses of coral-associated bacterial communities to heat stress differ with Symbiodinium type on the same coral host. Mol Ecol. 2010; 19(9):1978-90. DOI: 10.1111/j.1365-294X.2010.04620.x. View

Eakin C, Morgan J, Heron S, Smith T, Liu G, Alvarez-Filip L . Caribbean corals in crisis: record thermal stress, bleaching, and mortality in 2005. PLoS One. 2010; 5(11):e13969. PMC: 2981599. DOI: 10.1371/journal.pone.0013969. View

10.

Schneider C, Rasband W, Eliceiri K . NIH Image to ImageJ: 25 years of image analysis. Nat Methods. 2012; 9(7):671-5. PMC: 5554542. DOI: 10.1038/nmeth.2089. View

11.

Krediet C, Ritchie K, Paul V, Teplitski M . Coral-associated micro-organisms and their roles in promoting coral health and thwarting diseases. Proc Biol Sci. 2013; 280(1755):20122328. PMC: 3574386. DOI: 10.1098/rspb.2012.2328. View

12.

Kenkel C, Meyer E, Matz M . Gene expression under chronic heat stress in populations of the mustard hill coral (Porites astreoides) from different thermal environments. Mol Ecol. 2013; 22(16):4322-4334. DOI: 10.1111/mec.12390. View

13.

Matz M, Wright R, Scott J . No control genes required: Bayesian analysis of qRT-PCR data. PLoS One. 2013; 8(8):e71448. PMC: 3747227. DOI: 10.1371/journal.pone.0071448. View

14.

Pinzon J, Kamel B, Burge C, Harvell C, Medina M, Weil E . Whole transcriptome analysis reveals changes in expression of immune-related genes during and after bleaching in a reef-building coral. R Soc Open Sci. 2015; 2(4):140214. PMC: 4448857. DOI: 10.1098/rsos.140214. View

15.

Manzello D . Rapid Recent Warming of Coral Reefs in the Florida Keys. Sci Rep. 2015; 5:16762. PMC: 4645222. DOI: 10.1038/srep16762. View

16.

Wright R, Kenkel C, Dunn C, Shilling E, Bay L, Matz M . Intraspecific differences in molecular stress responses and coral pathobiome contribute to mortality under bacterial challenge in Acropora millepora. Sci Rep. 2017; 7(1):2609. PMC: 5454005. DOI: 10.1038/s41598-017-02685-1. View

17.

Nielsen D, Petrou K, Gates R . Coral bleaching from a single cell perspective. ISME J. 2018; 12(6):1558-1567. PMC: 5955907. DOI: 10.1038/s41396-018-0080-6. View

18.

Richardson L, Graham N, Pratchett M, Eurich J, Hoey A . Mass coral bleaching causes biotic homogenization of reef fish assemblages. Glob Chang Biol. 2018; 24(7):3117-3129. DOI: 10.1111/gcb.14119. View

19.

Hughes T, Kerry J, Baird A, Connolly S, Dietzel A, Eakin C . Global warming transforms coral reef assemblages. Nature. 2018; 556(7702):492-496. DOI: 10.1038/s41586-018-0041-2. View