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Mussels show capacity for persistence under, and recovery from, marine heatwaves

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Abstract

The ability of marine organisms to persist under, and recover from, periods of stressful conditions will shape their occurrence in future oceans characterized by exacerbated marine heatwaves (MHWs). Organism persistence and recovery may, in turn, be shaped by traits of the organisms themselves including, for example, body size. In the present study, we tested the responses (survival, heart rate, Arrhenius breakpoint temperature – ABT, clearance rate, respiration rate, and condition index) of large (5 cm) and small (3 cm) Perna viridis mussels after exposure to a three-week marine heatwave (MHW; + 4 °C) and a one-week recovery period. Exposure to elevated temperatures did not affect the survival of large or small mussels, however, at the end of the MHW both size classes exhibited increased heart rate under elevated temperatures, small mussels exhibited increased ABT, and large mussels exhibited significantly increased clearance rate. Following one week of recovery at control temperature, the altered responses had returned to be similar to those of mussels held under control conditions. The results obtained here indicate that both sizes of mussels can readily recover from exposure to short-term elevated temperatures imposed by MHWs, enabling the continued persistence of P. viridis mussels in future oceans.

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The datasets generated during the current study are available from the corresponding author on reasonable request.

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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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All authors contributed to the study conception and design. The experiment, data collection and analysis, and figure preparation were performed by James Ducker. The first draft of the manuscript was written by James Ducker, and all authors contributed to its revision. All authors read and approved the final manuscript.

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Correspondence to Laura J. Falkenberg.

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The authors have no relevant financial or non-financial interests to disclose.

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No approval of research ethics committees was required to accomplish the goals of this study because experimental work was conducted with an unregulated invertebrate species.

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Responsible Editor: P. A. Ramey-Balci.

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Ducker, J., Joyce, P.W.S. & Falkenberg, L.J. Mussels show capacity for persistence under, and recovery from, marine heatwaves. Mar Biol 170, 120 (2023). https://doi.org/10.1007/s00227-023-04274-5

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  • DOI: https://doi.org/10.1007/s00227-023-04274-5

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