Articles | Volume 12, issue 5
Research article
11 Mar 2015
Research article |  | 11 Mar 2015

Biogeochemical processes and buffering capacity concurrently affect acidification in a seasonally hypoxic coastal marine basin

M. Hagens, C. P. Slomp, F. J. R. Meysman, D. Seitaj, J. Harlay, A. V. Borges, and J. J. Middelburg

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Cited articles

Bannink, B. A., Van der Meulen, J. H. M., and Nienhuis, P. H.: Lake Grevelingen: from an estuary to a saline lake. An introduction, Netherlands J. Sea Res., 18, 179–190, 1984.
Ben-Yaakov, S.: pH buffering of pore water of recent anoxic marine sediments, Limnol. Oceanogr., 18, 86–94, 1973.
Borges, A. V. and Gypens, N.: Carbonate chemistry in the coastal zone responds more strongly to eutrophication than ocean acidification, Limnol. Oceanogr., 55, 346–353, 2010.
Brewer, P. G. and Peltzer, E. T.: Limits to marine life, Science, 324, 347–348, 2009.
Burnett, L. E.: The challenges of living in hypoxic and hypercapnic aquatic environments, Integr. Comp. Biol., 37, 633–640, 1997.
Short summary
This study looks at the combined impacts of hypoxia and acidification, two major environmental stressors affecting coastal systems, in a seasonally stratified basin. Here, the surface water experiences less seasonality in pH than the bottom water despite higher process rates. This is due to a substantial reduction in the acid-base buffering capacity of the bottom water as it turns hypoxic in summer. This highlights the crucial role of the buffering capacity as a modulating factor in pH dynamics.
Final-revised paper