Articles | Volume 18, issue 5
https://doi.org/10.5194/bg-18-1787-2021
https://doi.org/10.5194/bg-18-1787-2021
Ideas and perspectives
 | 
15 Mar 2021
Ideas and perspectives |  | 15 Mar 2021

Ideas and perspectives: When ocean acidification experiments are not the same, repeatability is not tested

Phillip Williamson, Hans-Otto Pörtner, Steve Widdicombe, and Jean-Pierre Gattuso

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Cited articles

Amrhein, V., Greenland, S., and McShane, B.: Scientists rise up against statistical significance, Nature, 567, 305–307, https://doi.org/10.1038/d41586-019-00857-9, 2019. 
Baker, M: 1,500 scientists lift the lid on reproducibility, Nature, 533, 452–454, https://doi.org/10.1038/533452a, 2016. 
Baumann, H.: Experimental assessments of marine species sensitivities to ocean acidification and co-stressors: how far have we come?, Can. J. Zool., 97, 399–408, https://doi.org/10.1139/cjz-2018-0198, 2019. 
Bindoff, N. L., Cheung, W. W. L., Kairo, J. G., Arístegui, J., Guinder, V. A., Hallberg, R., Hilmi, N., Jiao, N., Karim, M. S., Levin, L., O'Donoghue, S., Purca Cuicapusa, S. R., Rinkevich, B., Suga, T. Tagliabue A., and Williamson, P.: Changing ocean, marine ecosystems, and dependent communities, Chapt. 5, in: IPCC Special Report on the Ocean and Cryosphere in a Changing Climate, edited by: Pörtner, H.-O., Roberts, D. C., Masson-Delmotte, V., Zhai, P., Tignor, M., Poloczanska, E., Mintenbeck, K.,Alegrìa, A., Nicolai, M., Okem, A., Petzold, J.,Rama, B., and Weyer, N. M., Intergovernmental Panel on Climate Change, available at: https://www.ipcc.ch/srocc/chapter/chapter-5 (last access: 9 March 2021), 2019. 
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The reliability of ocean acidification research was challenged in early 2020 when a high-profile paper failed to corroborate previously observed impacts of high CO2 on the behaviour of coral reef fish. We now know the reason why: the replicated studies differed in many ways. Open-minded and collaborative assessment of all research results, both negative and positive, remains the best way to develop process-based understanding of the impacts of ocean acidification on marine organisms.
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