Rapid evolution fuels transcriptional plasticity to ocean acidification

Kang, Jingliang, Nagelkerken, Ivan, Rummer, Jodie L., Rodolfo-Metalpa, Riccardo, Munday, Philip L., Ravasi, Timothy, and Schunter, Celia (2022) Rapid evolution fuels transcriptional plasticity to ocean acidification. Global Change Biology, 28 (9). pp. 3007-3022.

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Abstract

Ocean acidification (OA) is postulated to affect the physiology, behavior, and life-history of marine species, but potential for acclimation or adaptation to elevated pCO2 in wild populations remains largely untested. We measured brain transcriptomes of six coral reef fish species at a natural volcanic CO2 seep and an adjacent control reef in Papua New Guinea. We show that elevated pCO2 induced common molecular responses related to circadian rhythm and immune system but different magnitudes of molecular response across the six species. Notably, elevated transcriptional plasticity was associated with core circadian genes affecting the regulation of intracellular pH and neural activity in Acanthochromis polyacanthus. Gene expression patterns were reversible in this species as evidenced upon reduction of CO2 following a natural storm-event. Compared with other species, Ac. polyacanthus has a more rapid evolutionary rate and more positively selected genes in key functions under the influence of elevated CO2, thus fueling increased transcriptional plasticity. Our study reveals the basis to variable gene expression changes across species, with some species possessing evolved molecular toolkits to cope with future OA.

Item ID: 74524
Item Type: Article (Research - C1)
ISSN: 1365-2486
Keywords: circadian rhythm, climate change, elevated pCO 2, intracellular pH, neuromolecular response, transcriptome
Copyright Information: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
Funders: Australian Research Council Centre of Excellence for Coral Reef Studies (ARC CoE Coral Reef Studies)
Projects and Grants: ARC CoE Coral Reef Studies FT120100183
Date Deposited: 02 Nov 2022 03:20
FoR Codes: 41 ENVIRONMENTAL SCIENCES > 4101 Climate change impacts and adaptation > 410102 Ecological impacts of climate change and ecological adaptation @ 60%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310406 Evolutionary impacts of climate change @ 20%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310403 Biological adaptation @ 20%
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