Symbiont composition and coral genotype determines massive coral species performance under end-of-century climate scenarios

Klepac, Courtney N.; Eaton, Katherine R.; Petrik, Chelsea G.; Arick, Lindsay N.; Hall, Emily R.; Muller, Erinn M.

doi:10.3389/fmars.2023.1026426

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Symbiont composition and coral genotype determines massive coral species performance under end-of-century climate scenarios

2023
By Klepac, Courtney N. ; Eaton, Katherine R. ; Petrik, Chelsea G. ; ...
Source: Frontiers in Marine Science, 10

[PDF-2.71 MB]

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Details:

Journal Title:

Frontiers in Marine Science
Personal Author:

Klepac, Courtney N. ; Eaton, Katherine R. ; Petrik, Chelsea G. ; Arick, Lindsay N. ; Hall, Emily R. ; ... More +

Klepac, Courtney N. ; Eaton, Katherine R. ; Petrik, Chelsea G. ; Arick, Lindsay N. ; Hall, Emily R. ; Muller, Erinn M. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies) ; CoRIS (Coral Reef Information System)

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies) ; CoRIS (Coral Reef Information System) Less -
Description:

The recent decline of coral health and substantial loss of coral cover along Florida’s Coral Reef (FCR) results from local stressors such as degraded water quality and disease outbreaks in addition to anthropogenically driven global stressors including ocean warming and acidification. Intervention strategies intended for the restoration of degraded reef habitats need a better understanding of the influence of ocean warming and acidification on coral health to target coral species and individual genotypes that may be more resistant or resilient to such stressors. Here, we examined a suite of physiological traits (coral host and algal symbiont) in response to experimentally elevated water temperatures and pCO2 levels, both separately and in concert, using threatened reef-building corals Pseudodiploria clivosa and Orbicella faveolata reared within a land-based coral nursery. After two months of exposure, responses differed by coral species, where P. clivosa showed declined physiology in response to combined ocean warming and acidification stress and ocean warming alone, whereas O. faveolata showed a positive response under ocean acidification. Responses to temperature could be associated with the algal symbionts harbored, as P. clivosa was dominated by the thermally sensitive Breviolum, and O. faveolata was dominated by the thermally tolerant Durusdinium. Additionally, corals were raised in well-sourced seawater that was naturally high in pCO2, which could have led to corals acclimating to acidified conditions. Of the three P. clivosa genets tested, we determined a top-performing genotype under the combined warming and acidification treatment. O. faveolata, however, displayed high genet variation by treatment and phenotypic trait, making genotype performance rankings challenging to discern. The evidence provided in this study demonstrates that high phenotypic variation in nursery-reared corals contributes to variable warming-acidification responses, suggesting that high-standing genetic variation in nursery-reared corals could support diverse coral restoration population outcomes along FCR.
Keywords:

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Aquatic Science Global And Planetary Change Ocean Engineering Oceanography Water Science And Technology
Source:

Frontiers in Marine Science, 10
DOI:

https://doi.org/10.3389/fmars.2023.1026426
Format:

PDF
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:972d57db5c91d27a450e1a30b2a93b910385e4ebae71f84ef13bb962908b367e
Download URL:

https://repository.library.noaa.gov/view/noaa/49023/noaa_49023_DS1.pdf
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	Machine readable version (XML)	xml
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