the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
High-resolution ocean pH dynamics in four subtropical Atlantic benthic habitats
Abstract. Oscillations of ocean pH are largely unknown in coastal environments and ocean acidification studies often do not account for natural variability yet most of what is known about marine species and populations is found out via studies conducted in near shore environments. Most experiments designed to make predictions about future climate change scenarios are carried out in coastal environments with no research that takes into account the natural pH variability. In order to fill this knowledge gap and to provide reliable measures of pH oscillation, seawater pH was measured over time using moored pH sensors in four contrasting phytocenoses typical of the north Atlantic subtropical region. Each phytocenosis was characterized by its predominant engineer species: (1) Cystoseira abies-marina, (2) a mix of gelidiales and geniculate corallines, (3) Lobophora variegata, and (4) encrusting corallines. The autonomous pH measuring systems consisted of a pH sensor; a data logger and a battery encased in a waterproof container and allowed the acquisition of high-resolution continuous pH data at each of the study sites. The pH variation observed ranged by between 0.09 and 0.24 pHNBS units. A clear daily variation in seawater pH was detected at all the studied sites (0.04–0.12 pHNBS units). Significant differences in daily pH oscillations were also observed between phytocenoses, which shows that macroalgal communities influence the seawater pH in benthic habitats. Natural oscillations in pH must be taken into account in future ocean acidification studies to put findings in perspective and for any ecological recommendations to be realistic.
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RC C8914: 'Referee comments on bg-2015-603', Phillip Williamson, 07 Jan 2016
- AC C9323: 'Replay to Dr. P.Williamson', José Carlos Hernández, 21 Jan 2016
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RC C10612: 'bgd-12-19481-2015-Comments', Anonymous Referee #2, 17 Jul 2016
- AC C10613: 'Replay to reviewer #2 and reviewed manuscript as supplement', José Carlos Hernández, 15 Aug 2016
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RC C8914: 'Referee comments on bg-2015-603', Phillip Williamson, 07 Jan 2016
- AC C9323: 'Replay to Dr. P.Williamson', José Carlos Hernández, 21 Jan 2016
-
RC C10612: 'bgd-12-19481-2015-Comments', Anonymous Referee #2, 17 Jul 2016
- AC C10613: 'Replay to reviewer #2 and reviewed manuscript as supplement', José Carlos Hernández, 15 Aug 2016
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Cited
4 citations as recorded by crossref.
- Planktonic stages of the ecologically important sea urchin, Diadema africanum: larval performance under near future ocean conditions J. Hernández et al. 10.1093/plankt/fbaa016
- A new CO 2 vent for the study of ocean acidification in the Atlantic C. Hernández et al. 10.1016/j.marpolbul.2016.05.040
- Diversity ofCystoseira sensu lato(Fucales, Phaeophyceae) in the eastern Atlantic and Mediterranean based on morphological and DNA evidence, includingCarpodesmiagen. emend. andTreptacanthagen. emend. S. Orellana et al. 10.1080/09670262.2019.1590862
- Effects of natural current pH variability on the sea urchin Paracentrotus lividus larvae development and settlement E. García et al. 10.1016/j.marenvres.2018.04.012