Evidence of separate influence of moon and sun on light synchronization of mussel’s daily rhythm during the polar night

Tran, Damien; Andrade, Hector; Camus, Lionel; Léopold, P; Ballantine, Carl; Berge, Jørgen; Durier, Guillaume; Sow, Mohamedou; Ciret, Pierre

doi:10.1016/j.isci.2023.106168

Cited by 4 publications

(2 citation statements)

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“…As a bivalve organism, it shows valve opening behavioral rhythms, closely related to physiological processes such as breathing and nutrition, synchronized by environmental factors (García-March et al 2008;Tran et al 2011). A recent study has shown that both moonlight and sunlight oscillations below the horizon shape the blue mussel's valve behavior during the high Arctic polar night (Tran et al 2023). However, how do mussels control their valve behavior during the high Arctic polar day remains unknown.…”

Section: Introductionmentioning

confidence: 99%

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Blue mussels’ valve behavior exhibits daily and lunar rhythms during the high Arctic polar day

et al. 2023

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Marine species exhibit a multitude of biological rhythms, in accordance with their complex ecosystem governed by sun, earth and moon trajectories. Because of the inclination of the earth's axis, the high Arctic ecosystem is characterized by several months of permanent illumination during the polar day (PD).The persistence of biological rhythms in this photic context remains unclear. Yet, this information is crucial for the understanding of polar ecosystems functioning, as well as to predict the impact of future climate changes. Particularly, the impact of extreme photoperiods on recent invasive species remains largely unknown. Here, we investigate how environmental cycles shape the behavior of a re-emerging polar resident, the mussel Mytilus sp. during PD (17 April to 26 August 2020; Svalbard, Ny-Ålesund, 78°56' N, 11°56' E). Our results show that in the high Arctic PD, mussels' behavior is shaped by both the photoperiod and the diel sun trajectories above the horizon. Additionally, mussels also exhibit tidal, semilunar, and lunar rhythms of valve opening amplitude. We argue that these rhythms may have ecosystems functioning implications, and that the mussels' ability to deal with drastic light regimes may explain their northward expansion and new resettlement in high Arctic.

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Section: Introductionmentioning

confidence: 99%

“…That result corroborates the recent study showing that Mytilus sp. expresses lunar behavioral rhythm at the same location during polar night(Tran et al 2023). However, if the moonlight entrainment during polar night is intuitively clear, how the mussels are entrained by the lunar cycle in a context of permanent illumination is an open question.…”

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confidence: 99%