Climate change alters the haemolymph microbiome of oysters

Elliot Scanes; Laura M Parker; Justin R Seymour; Nachshon Siboni; William L King; Nathan P Danckert; K Mathias Wegner; Michael C Dove; Wayne A O'Connor; Pauline M Ross

doi:10.1016/j.marpolbul.2021.111991

Climate change alters the haemolymph microbiome of oysters

Mar Pollut Bull. 2021 Mar:164:111991. doi: 10.1016/j.marpolbul.2021.111991. Epub 2021 Jan 20.

Authors

Affiliations

¹ The University of Sydney, School of Life and Environmental Sciences, Camperdown, New South Wales 2006, Australia. Electronic address: elliot.scanes@sydney.edu.au.
² The University of New South Wales, School of Biological, Earth and Environmental Sciences, Kensington, New South Wales 2052, Australia.
³ Climate Change Cluster, University of Technology Sydney, Ultimo, New South Wales 2007, Australia.
⁴ Climate Change Cluster, University of Technology Sydney, Ultimo, New South Wales 2007, Australia; Department of Plant Pathology and Environmental Microbiology, The Pennsylvania State University, University Park, PA 16802, USA.
⁵ The University of Sydney, School of Life and Environmental Sciences, Camperdown, New South Wales 2006, Australia.
⁶ Helmholtz Centre for Polar and Marine Research, Alfred Wegener Institute, Coastal Ecology, Wadden Sea Station, List, Sylt 25992, Germany.
⁷ New South Wales Department of Primary Industries, Port Stephens Fisheries Institute, Taylors Beach, New South Wales 2316, Australia.

PMID: 33485019
DOI: 10.1016/j.marpolbul.2021.111991

Abstract

The wellbeing of marine organisms is connected to their microbiome. Oysters are a vital food source and provide ecological services, yet little is known about how climate change such as ocean acidification and warming will affect their microbiome. We exposed the Sydney rock oyster, Saccostrea glomerata, to orthogonal combinations of temperature (24, 28 °C) and pCO₂ (400 and 1000 μatm) for eight weeks and used amplicon sequencing of the 16S rRNA (V3-V4) gene to characterise the bacterial community in haemolymph. Overall, elevated pCO₂ and temperature interacted to alter the microbiome of oysters, with a clear partitioning of treatments in CAP ordinations. Elevated pCO₂ was the strongest driver of species diversity and richness and elevated temperature also increased species richness. Climate change, both ocean acidification and warming, will alter the microbiome of S. glomerata which may increase the susceptibility of oysters to disease.

Keywords: Aquaculture; Bivalve; Climate change; Microbiome; Ocean acidification; Oyster.

MeSH terms

Animals
Carbon Dioxide
Climate Change
Hydrogen-Ion Concentration
Microbiota*
Ostreidae* / genetics
RNA, Ribosomal, 16S
Seawater

Substances

RNA, Ribosomal, 16S
Carbon Dioxide