Abstract
Recently, some of the older literature purported to demonstrate a positive interaction between solar radiation and thermal stress on the phenomenon of coral bleaching have been called into question (Dunne 2010). Dunne (2010) correctly points out important experimental design and analysis issues related to the interpretation of multi-factorial designs, and both positive and negative interactive effects, with emphasis on the point that once interactive effects are detected no interpretation of the main effects of a multi-factorial design is appropriate. Dunne (2010) presents a number of statistical analyses to address this issue that are valuable and deserve significant discussion. While Dunne (2010) was specifically addressing the issue of the misuse of the term “synergy” some of the analyses presented may have understated the presence of such interactions. Here, I conduct a re-analysis of specific datasets using another potentially useful approach that shows both positive and negative interactions during experiments on bleaching.
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References
Day RW, Quinn GP (1989) Comparisons of treatments after and analysis of variance in ecology. Ecol Monogr 59:433–463
Dunne RP (2010) Synergy or antagonism-interactions between stressors on coral reefs. Coral Reefs 29:145–152
Gaito J (1959) Multiple comparisons in analysis of variance. Psychol Bull 56:392–393
Lesser MP (1996) Exposure of symbiotic dinoflagellates to elevated temperatures and ultraviolet radiation causes oxidative stress and photosynthesis. Limnol Oceanogr 41:271–283
Lesser MP (2006) Oxidative stress in marine environments: biochemistry and physiological ecology. Annu Rev Physiol 68:253–278
Lesser MP, Farrell J (2004) Solar radiation increases the damage to both host tissues and algal symbionts of corals exposed to thermal stress. Coral Reefs 23:367–377
Lesser MP, Stochaj WR, Tapley DW, Shick JM (1990) Bleaching in coral reef anthozoans: effects of irradiance, ultraviolet radiation, and temperature on the activities of protective enzymes against active oxygen. Coral Reefs 8:225–232
Lesser MP, Weis VM, Patterson MR, Jokiel PL (1994) Effects of morphology and water motion on carbon delivery and productivity in the reef coral, Pocillopora damicornis (Linnaeus): diffusion barriers, inorganic carbon limitation and biochemical plasticity. J Exp Mar Biol Ecol 178:153–179
Nakagawa S (2004) A farewell to Bonferroni: the problems of low statistical power and publication bias. Behav Ecol 15:1044–1045
Ryan TA (1959a) Multiple comparisons in psychological research. Psychol Bull 56:26–47
Ryan TA (1959b) Comment on orthoganal components. Psychol Bull 56:394–396
Underwood AJ (1997) Experiments in ecology. Cambridge University Press, United Kingdom
Acknowledgments
The author would like to thank NOAA, NSF and ONR for supporting his work on coral bleaching. Additionally, the manuscript was greatly improved by two anonymous reviewers and during the final revision by comments from Richard Dunne.
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Communicated by Environment Editor Prof. Rob van Woesik
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Lesser, M.P. Interactions between stressors on coral reefs: analytical approaches, re-analysis of old data, and different conclusions . Coral Reefs 29, 615–619 (2010). https://doi.org/10.1007/s00338-010-0625-2
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DOI: https://doi.org/10.1007/s00338-010-0625-2