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Proc Biol Sci. 2018 Jun 27;285(1881). pii: 20180340. doi: 10.1098/rspb.2018.0340.

Ocean warming alters predicted microbiome functionality in a common sea urchin.

Author information

1
Department of Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA ceciliajbrothers@gmail.com.
2
Biomedical Informatics, Center for Clinical and Translational Science, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
3
Department of Cell, Developmental, and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
4
Department of Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.

Abstract

The microbiome of sea urchins plays a role in maintaining digestive health and innate immunity. Here, we investigated the effects of long-term (90 day) exposure to elevated seawater temperatures on the microbiome of the common, subtropical sea urchin Lytechinus variegatus The community composition and diversity of microbes varied according to the type of sample collected from the sea urchin (seawater, feed, intestines, coelomic fluid, digested pellet and faeces), with the lowest microbial diversity (predominately the order Campylobacterales) located in the intestinal tissue. Sea urchins exposed to near-future seawater temperatures maintained the community structure and diversity of microbes associated with their tissues. However, marginal, non-significant shifts in microbial community structure with elevated temperature resulted in significant changes in predicted metagenomic functions such as membrane transport and amino acid and carbohydrate metabolism. The predicted changes in key metabolic categories suggest that near-future climate-induced increases in seawater temperature could shift microbial community function and impact sea urchin digestive and immune physiology.

KEYWORDS:

16S rRNA; Lytechinus variegatus; PICRUSt; climate change; microbial ecology; next-generation sequencing

PMID:
29925614
PMCID:
PMC6030520
[Available on 2019-06-27]
DOI:
10.1098/rspb.2018.0340
[Indexed for MEDLINE]

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