Physiological responses of Pocillopora corals to upwelling events in the Eastern Tropical Pacific

Castrillón-Cifuentes, Ana Lucia; Zapata, Fernando A.; Wild, Christian

doi:10.3389/fmars.2023.1212717

Cited by 3 publications

(1 citation statement)

References 144 publications

(181 reference statements)

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“…Seasonal changes in MDOC are influenced by sunlight, ice cover, air temperature, winds, and currents (Kroeker et al, 2020;Xu et al, 2022). Events like upwelling, which brings colder deep seawater with lower MDOC content to the surface, also cause short-term MDOC variations (Booth et al, 2012;Chen et al, 2022;Castrilloń-Cifuentes et al, 2023;Wang et al, 2023a). The conclusion drawn from the SHAP analysis that salinity is negatively correlated with MDOC is consistent with RuleFit analysis.…”

Section: Post-hoc Analysismentioning

confidence: 99%

A high-precision interpretable framework for marine dissolved oxygen concentration inversion

Li,

Liu,

Yang

et al. 2024

Front. Mar. Sci.

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Variations in Marine Dissolved Oxygen Concentrations (MDOC) play a critical role in the study of marine ecosystems and global climate evolution. Although artificial intelligence methods, represented by deep learning, can enhance the precision of MDOC inversion, the uninterpretability of the operational mechanism involved in the “black-box” often make the process difficult to interpret. To address this issue, this paper proposes a high-precision interpretable framework (CDRP) for intelligent MDOC inversion, including Causal Discovery, Drift Detection, RuleFit Model, and Post Hoc Analysis. The entire process of the proposed framework is fully interpretable: (i) The causal relationships between various elements are further clarified. (ii) During the phase of concept drift analysis, the potential factors contributing to changes in marine data are extracted. (iii) The operational rules of RuleFit ensure computational transparency. (iv) Post hoc analysis provides a quantitative interpretation from both global and local perspectives. Furthermore, we have derived quantitative conclusions about the impacts of various marine elements, and our analysis maintains consistency with conclusions in marine literature on MDOC. Meanwhile, CDRP also ensures the precision of MDOC inversion: (i) PCMCI causal discovery eliminates the interference of weakly associated elements. (ii) Concept drift detection takes more representative key frames. (iii) RuleFit achieves higher precision than other models. Experiments demonstrate that CDRP has reached the optimal level in single point buoy data inversion task. Overall, CDRP can enhance the interpretability of the intelligent MDOC inversion process while ensuring high precision.

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Section: Post-hoc Analysismentioning

confidence: 99%

A high-precision interpretable framework for marine dissolved oxygen concentration inversion

Li,

Liu,

Yang

et al. 2024

Front. Mar. Sci.

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Coral species-specific loss and physiological legacy effects are elicited by extended marine heatwave

Strand,

Wong,

Farraj

et al. 2023

Preprint

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Marine heatwaves are increasing in frequency and intensity, with potentially catastrophic consequences for marine taxa and ecosystems such as coral reefs. Environmentally realistic, extended heatwave and recovery time-series in a multi-stressor experimental framework can therefore provide enhanced predictive capacity for the performance of such systems under climate change. We exposed two common reef-building corals in Hawaiʻi, Montipora capitata and Pocillopora acuta, to a two-month period of high temperature and high pCO2 conditions (29.5C, ~1100 ppm) or ambient conditions (27.5C, ~500 ppm) in a factorial design, followed by two months of return to ambient conditions. In response to high temperature, but not high pCO2, multivariate physiology shifted through time in both species, driven by decreases in respiration rates and endosymbiont density. P. acuta exhibited more significantly altered physiology, and substantially higher bleaching and mortality than M. capitata. The species specific sensitivity of P. acuta appears to be driven by higher baseline rates of photosynthesis and lower initial host antioxidant capacity and thus sensitivity to reactive oxygen species under thermal stress. Thermal tolerance of M. capitata may be due in part to harboring a mixture of Cladocopium and Durusdinium spp., while P. acuta was dominated by other distinct Cladocopium spp., but there was no evidence of Symbiodiniaceae shuffling due to treatment or time. Only M. capitata survived the exposure and recovery period, but physiological state in heatwave-exposed M. capitata remained significantly diverged at the end of the recovery period relative to M. capitata that experienced ambient conditions. In extended heatwave and climate change stressor scenarios, our results indicate a species-specific loss of corals that are driven by baseline differences in both host and symbiont physiology. Notably, the species that survive climate change conditions exhibit lasting physiological legacies that are likely to influence future stress responses.

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Coral species-specific loss and physiological legacy effects are elicited by an extended marine heatwave

Strand,

Wong,

Farraj

et al. 2024

Journal of Experimental Biology

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Marine heatwaves are increasing in frequency and intensity, with potentially catastrophic consequences for marine ecosystems like coral reefs. An extended heatwave and recovery time-series that incorporates multiple stressors and is environmentally realistic can provide enhanced predictive capacity for performance under climate change conditions. We exposed common reef-building corals in Hawaiʻi, Montipora capitata and Pocillopora acuta, to a two-month period of high temperature and high pCO2 conditions or ambient conditions in a factorial design, followed by two months of ambient conditions. High temperature, rather than high pCO2, drove multivariate physiology shifts through time in both species, including decreases in respiration rates and endosymbiont densities. Pocillopora acuta exhibited more significantly negatively altered physiology, substantially higher bleaching, and mortality than M. capitata. The sensitivity of P. acuta appears to be driven by higher baseline rates of photosynthesis paired with lower host antioxidant capacity, creating an increased sensitivity to oxidative stress. Thermal tolerance of M. capitata may be partly due to harboring a mixture of Cladocopium and Durusdinium spp., while P. acuta was dominated by other distinct Cladocopium spp. Only M. capitata survived the experiment, but physiological state in heatwave-exposed M. capitata remained significantly diverged at the end of recovery relative to individuals that experienced ambient conditions. In future climate scenarios, particularly marine heatwaves, our results indicate a species-specific loss of corals that is driven by baseline host and symbiont physiological differences as well as Symbiodiniaceae community compositions with the surviving species experiencing physiological legacies that are likely to influence future stress responses.

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Physiological responses of Pocillopora corals to upwelling events in the Eastern Tropical Pacific

Cited by 3 publications

References 144 publications

A high-precision interpretable framework for marine dissolved oxygen concentration inversion

A high-precision interpretable framework for marine dissolved oxygen concentration inversion

Coral species-specific loss and physiological legacy effects are elicited by extended marine heatwave

Coral species-specific loss and physiological legacy effects are elicited by an extended marine heatwave

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