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Differing lesion recovery rates of two Caribbean stony coral species across a shallow water to mesophotic depth gradient suggest different sensitivity to repeated disturbance

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Abstract

Following major stress events such as storms, bleaching events, or disease outbreaks, surviving corals must regenerate tissue to recover. We aimed to understand how this recovery changes across depth, hypothesizing that deeper corals would regenerate more slowly and that this may limit resilience to acute stressors. Two species of reef-building coral, Orbicella franksi (an intermediate-depth species) and Agaricia lamarcki (a depth-generalist), were tagged at selected sites across their overlapping depth range of 13–41 m and directly monitored for recovery from experimentally generated lesions across time. Overall, recovery rates were distinct between species and across depths, with O. franksi recovery rates showing high variability and declining at depth. In contrast, A. lamarcki maintained similar rates of recovery across the examined depth range. The consistent response of A. lamarcki suggests that it can attenuate its biology with changing light resources to maintain healing abilities in different environments. Recovery rates were additionally compared against environmental and biological covariates and it was found that only increased initial lesion size had a significant positive effect on tissue regeneration rates for A. lamarcki. Collectively, this suggests that some mesophotic coral reefs, despite having high coral cover, may be slower to recover from stress events if dominated by non-depth-generalist species, such as O. franksi, resulting in increased vulnerability to repeated stress events.

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Data availability

All DNA sequence data collected during this study is available in Genbank. Remaining datasets generated and analyzed during the current study are included in this publication [and its supplementary information files.

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Acknowledgements

The authors would like to acknowledge the funding support from the following entities: The National Oceanic and Atmospheric Administration (NOAA), The Black Coral Penalty Fund, the Wottowa Fund, the Lana Vento Charitable Trust, and The National Science Foundation. The authors would like to acknowledge the contribution and efforts by members of the Smith Lab for completion of fieldwork: Kyle Jerris, Rosmin Ennis, Viktor Brandtneris, Sarah Heidmann, and Kristen Ewen. The authors would also like to acknowledge members of the Baums lab and Lajeunesse lab for their assistance and insight into laboratory analysis and technique. Additionally authors acknowledge the support from the University of the Virgin Islands Masters of Marine and Environmental Sciences cohort of 2017, as well as family, dear friends, and pets who have all supported the completion of this work whenever and however possible. All views expressed are those of the authors and do not necessarily reflect the views of the granting agencies and support personnel. This is contribution 262 from the Center for Marine and Environmental Science, University of the Virgin Islands

Funding

This work was funded by the US Virgin Islands Territorial Coral Reef Monitoring Program (GC021PNR15/NA17NOS4820033), the Black Coral Penalty Fund, the Wottowa Fund, the Lana Vento Charitable Trust, the NSF INCLUDES Supporting Emerging Aquatic Scientists (SEAS) Islands Alliance (NSF Award #1930991), and the VI Established Program to Stimulate Competitive Research (NSF Award #1355437).

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All authors contributed to the study conception and design. Material preparation, field data collection were completed by JET and TBS. Computational data collection was completed by SM. Data analysis was performed by JET and MB. The first draft of the manuscript was written by JET and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Joseph E. Townsend.

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The authors have no relevant financial or non-financial interests to disclose. On behalf of all authors, the corresponding author states that there is no conflict of interest.

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Townsend, J.E., Brandt, M.E., Mukherjee, S. et al. Differing lesion recovery rates of two Caribbean stony coral species across a shallow water to mesophotic depth gradient suggest different sensitivity to repeated disturbance. Coral Reefs 42, 1067–1077 (2023). https://doi.org/10.1007/s00338-023-02414-3

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  • DOI: https://doi.org/10.1007/s00338-023-02414-3

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