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Garrido M, Cecchi P, Malet N, Bec B, Torre F, Pasqualini V. Evaluation of FluoroProbe® performance for the phytoplankton-based assessment of the ecological status of Mediterranean coastal lagoons. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:204. [PMID: 30834469 DOI: 10.1007/s10661-019-7349-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
The European Water Framework Directive and several other legislations worldwide have selected phytoplankton for monitoring the ecological status of surface waters. This assessment is a complicated task in coastal lagoons due to their intrinsic variability, prompting moves to use real-time measurements. Here, we tested the ability of the submersible spectrofluorometer FluoroProbe® to accurately estimate the phytoplankton biomass and to efficiently discriminate spectral groups in Mediterranean coastal lagoons, by using sub-surface water samples (n = 107) collected at Biguglia lagoon (Corsica) in different environmental situations (salinity and trophic state) from March 2012 to December 2014. We compared the estimates of biomass and phytoplankton group composition obtained with the FluoroProbe® (in situ and lab measurements) with the spectrofluorimetrically measured biomass and HPLC-derived quantifications of pigment concentrations. FluoroProbe® provided good estimates of the total phytoplankton biomass (particularly, the lab measurements). The FluoroProbe® data were significantly correlated with the HPLC results, except for the in situ measurements of very weak concentrations of blue-green and red algae. Our findings indicate that factory-calibrated FluoroProbe® is an efficient and easy-to-use real-time phytoplankton monitoring tool in coastal lagoons, especially as an early warning system for the detection of potentially harmful algal blooms. Practical instructions dedicated to non-specialist field operators are provided. A simple and efficient method for discarding in situ measurement outliers is also proposed.
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Affiliation(s)
- Marie Garrido
- UMR SPE CNRS, UMS Stella Mare CNRS, Université de Corse, BP 52, 20250, Corte, France
| | - Philippe Cecchi
- MARBEC, CNRS, Ifremer, IRD, University Montpellier, Montpellier, France.
- Centre de Recherches Océanologiques (CRO), BP V18, Abidjan 18, Côte d'Ivoire.
| | - Nathalie Malet
- IFREMER, Laboratoire Environnement Ressources Provence-Azur-Corse, Station de Corse, Z.I. Furiani, Immeuble Agostini, 20600, Bastia, France
| | - Béatrice Bec
- MARBEC, CNRS, Ifremer, IRD, University Montpellier, Montpellier, France
| | - Franck Torre
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale, UMR IMBE, Aix Marseille Univ, Avignon Université, CNRS, IRD, Marseille, France
| | - Vanina Pasqualini
- UMR SPE CNRS, UMS Stella Mare CNRS, Université de Corse, BP 52, 20250, Corte, France
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Ben Gharbia H, Kéfi-Daly Yahia O, Cecchi P, Masseret E, Amzil Z, Herve F, Rovillon G, Nouri H, M'Rabet C, Couet D, Zmerli Triki H, Laabir M. New insights on the species-specific allelopathic interactions between macrophytes and marine HAB dinoflagellates. PLoS One 2017; 12:e0187963. [PMID: 29149214 PMCID: PMC5693406 DOI: 10.1371/journal.pone.0187963] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 10/30/2017] [Indexed: 01/27/2023] Open
Abstract
Macrophytes are known to release allelochemicals that have the ability to inhibit the proliferation of their competitors. Here, we investigated the effects of the fresh leaves of two magnoliophytes (Zostera noltei and Cymodocea nodosa) and thalli of the macroalgae Ulva rigida on three HAB-forming benthic dinoflagellates (Ostreopsis cf. ovata, Prorocentrum lima, and Coolia monotis). The effects of C. nodosa and U. rigida were also tested against the neurotoxic planktonic dinoflagellate Alexandrium pacificum Litaker sp. nov (former Alexandrium catenella). Co-culture experiments were conducted under controlled laboratory conditions and potential allelopathic effects of the macrophytes on the growth, photosynthesis and toxin production of the targeted dinoflagellates were evaluated. Results showed that U. rigida had the strongest algicidal effect and that the planktonic A. pacificum was the most vulnerable species. Benthic dinoflagellates seemed more tolerant to potential allelochemicals produced by macrophytes. Depending on the dinoflagellate/macrophyte pairs and the weight of leaves/thalli tested, the studied physiological processes were moderately to heavily altered. Our results suggest that the allelopathic activity of the macrophytes could influence the development of HAB species.
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Affiliation(s)
- Hela Ben Gharbia
- Research Group on Oceanography and Plankton Ecology, Tunisian National Institute of Agronomy (INAT), IRESA-Carthage University. U.R.13ES36 Marine Biology (University of Tunis El Manar), Tunis, Tunisia
| | - Ons Kéfi-Daly Yahia
- Research Group on Oceanography and Plankton Ecology, Tunisian National Institute of Agronomy (INAT), IRESA-Carthage University. U.R.13ES36 Marine Biology (University of Tunis El Manar), Tunis, Tunisia
| | - Philippe Cecchi
- Center for Marine Biodiversity, Exploitation and Conservation (MARBEC): IRD, IFREMER, CNRS, Montpellier University, Montpellier, France
| | - Estelle Masseret
- Center for Marine Biodiversity, Exploitation and Conservation (MARBEC): IRD, IFREMER, CNRS, Montpellier University, Montpellier, France
| | | | | | | | - Habiba Nouri
- Institut de Recherche pour le Développement (IRD), Tunis, Tunisia
| | - Charaf M'Rabet
- Research Group on Oceanography and Plankton Ecology, Tunisian National Institute of Agronomy (INAT), IRESA-Carthage University. U.R.13ES36 Marine Biology (University of Tunis El Manar), Tunis, Tunisia
| | - Douglas Couet
- Institut de Recherche pour le Développement (IRD), Tunis, Tunisia
| | - Habiba Zmerli Triki
- Research Group on Oceanography and Plankton Ecology, Tunisian National Institute of Agronomy (INAT), IRESA-Carthage University. U.R.13ES36 Marine Biology (University of Tunis El Manar), Tunis, Tunisia
| | - Mohamed Laabir
- Center for Marine Biodiversity, Exploitation and Conservation (MARBEC): IRD, IFREMER, CNRS, Montpellier University, Montpellier, France
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