Ocean acidification with (de)eutrophication will alter future phytoplankton growth and succession.

Flynn, KJ, Clark, DR, Mitra, A, Fabian, H, Hansen, PJ, Glibert, PM, Wheeler, GL, Stoecker, DK, Blackford, JC and Brownlee, C 2015 Ocean acidification with (de)eutrophication will alter future phytoplankton growth and succession.. Proceedings. Biological sciences / The Royal Society, 282 (1804). 20142604. https://doi.org/10.1098/rspb.2014.2604

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Official URL: http://dx.doi.org/10.1098/rspb.2014.2604


Human activity causes ocean acidification (OA) though the dissolution of anthropogenically generated CO2 into seawater, and eutrophication through the addition of inorganic nutrients. Eutrophication increases the phytoplankton biomass that can be supported during a bloom, and the resultant uptake of dissolved inorganic carbon during photosynthesis increases water-column pH (bloom-induced basification). This increased pH can adversely affect plankton growth. With OA, basification commences at a lower pH. Using experimental analyses of the growth of three contrasting phytoplankton under different pH scenarios, coupled with mathematical models describing growth and death as functions of pH and nutrient status, we show how different conditions of pH modify the scope for competitive interactions between phytoplankton species. We then use the models previously configured against experimental data to explore how the commencement of bloom-induced basification at lower pH with OA, and operating against a background of changing patterns in nutrient loads, may modify phytoplankton growth and competition. We conclude that OA and changed nutrient supply into shelf seas with eutrophication or de-eutrophication (the latter owing to pollution control) has clear scope to alter phytoplankton succession, thus affecting future trophic dynamics and impacting both biogeochemical cycling and fisheries.

Item Type: Publication - Article
Additional Keywords: ocean acidification, eutrophication, primary production, plankton succession, food security
Subjects: Biology
Ecology and Environment
Marine Sciences
Divisions: Plymouth Marine Laboratory > Science Areas > Marine System Modelling
Marine Biological Association of the UK > Marine Microbiome
Depositing User: Dr Glen Wheeler
Date made live: 17 Nov 2015 13:02
Last Modified: 09 Feb 2024 17:05
URI: https://plymsea.ac.uk/id/eprint/6553

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