Changes in the metabolic potential of the sponge microbiome under ocean acidification

Emmanuelle S. Botté, Shaun Nielsen, Muhammad Azmi Abdul Wahab, John Webster, Steven Robbins, Torsten Thomas and Nicole S. Webster ()
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Emmanuelle S. Botté: Australian Institute of Marine Science
Shaun Nielsen: University of New South Wales
Muhammad Azmi Abdul Wahab: Australian Institute of Marine Science
John Webster: University of New South Wales
Steven Robbins: University of Queensland
Torsten Thomas: University of New South Wales
Nicole S. Webster: Australian Institute of Marine Science

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Anthropogenic CO2 emissions are causing ocean acidification, which can affect the physiology of marine organisms. Here we assess the possible effects of ocean acidification on the metabolic potential of sponge symbionts, inferred by metagenomic analyses of the microbiomes of two sponge species sampled at a shallow volcanic CO2 seep and a nearby control reef. When comparing microbial functions between the seep and control sites, the microbiome of the sponge Stylissa flabelliformis (which is more abundant at the control site) exhibits at the seep reduced potential for uptake of exogenous carbohydrates and amino acids, and for degradation of host-derived creatine, creatinine and taurine. The microbiome of Coelocarteria singaporensis (which is more abundant at the seep) exhibits reduced potential for carbohydrate import at the seep, but greater capacity for archaeal carbon fixation via the 3-hydroxypropionate/4-hydroxybutyrate pathway, as well as archaeal and bacterial urea production and ammonia assimilation from arginine and creatine catabolism. Together these metabolic features might contribute to enhanced tolerance of the sponge symbionts, and possibly their host, to ocean acidification.

Date: 2019
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DOI: 10.1038/s41467-019-12156-y

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