Phytoplankton strategies to exploit nutrients in coastal lagoons with different eutrophication status during re-oligotrophication
| Autor: | Béatrice Bec, François Guilhaumon, R. De Wit, Nathalie Malet, Amandine Leruste, Yves Collos |
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| Přispěvatelé: | MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Environnement Ressources Provence Azur Corse (LERPAC), LITTORAL (LITTORAL), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Ecosystèmes lagunaires : organisation biologique et fonctionnement (ECOLAG), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS), IFREMER - Laboratoire Provence Azur Corse, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
[SDV]Life Sciences [q-bio] Aquatic Science 010603 evolutionary biology 01 natural sciences Nutrient Aquatic plant Phytoplankton 14. Life underwater Water pollution Ecology Evolution Behavior and Systematics ComputingMilieux_MISCELLANEOUS [SDV.EE]Life Sciences [q-bio]/Ecology environment Biomass (ecology) Growth rate Ecology 010604 marine biology & hydrobiology Dilution experiment 15. Life on land Plankton 6. Clean water Nutrient limitation Environmental science Water quality HPLC Eutrophication |
| Zdroj: | Aquatic Microbial Ecology Aquatic Microbial Ecology, 2019, ⟨10.3354/ame01906⟩ Aquatic Microbial Ecology, Inter Research, 2019, ⟨10.3354/ame01906⟩ Aquatic Microbial Ecology (0948-3055) (Inter-Research Science Center), 2019, Vol. 83, N. 2, P. 131-146 |
| ISSN: | 0948-3055 |
| DOI: | 10.3354/ame01906⟩ |
| Popis: | We studied a mesotrophic and a hypertrophic Mediterranean coastal lagoon, both of which had been simultaneously subjected to a nutrient input reduction for 9 yr. We compared these 2 lagoons to an oligotrophic coastal lagoon. Using bioassays comprising 24 h incubations with added phosphorus and/or ammonium, we investigated the response of the phytoplankton communities to nutrient enrichment during summer in terms of biomass, size class structure, abundance and growth. For nitrogen and phosphorus, we identified which nutrient limited phytoplankton growth, and what strategies of nutrient exploitation the communities adopted to cope with these limitations. Ultraphytoplankton dominated the 3 communities, but it differed in composition among the lagoons. Green algae dominated in the hypertrophic lagoon, whereas the mesotrophic lagoon presented a higher diversity of phytoplankton groups. Picocyanobacteria and small diatoms were the most abundant groups in the oligotrophic lagoon, although they accounted for less biomass than green algae. The communities of the mesotrophic and the hypertrophic lagoons strongly responded to the nutrient pulse, showing that the re-oligotrophication trajectories of these lagoons were still very vulnerable to occasional eutrophication events. On the other hand, the oligotrophic lagoon marginally responded to the enrichment, indicating its adaptation to nutrient-depleted conditions. We observed a shift along the eutrophication gradient, from a co-limitation by N and P in the oligotrophic and the mesotrophic lagoons to a single and strong N limitation in the hypertrophic lagoon. Each community demonstrated specific use of internal, external or recycled nutrient pools under experimentally induced limitation. |
| Databáze: | OpenAIRE |
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