The influence of salinity in the domoic acid effect on estuarine phytoplankton communities |
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| Affiliation: | 1. IFREMER, REM-EEP-LEP, BP 70, 29280 Plouzané, France;2. Station Biologique de Roscoff (Roscoff Marine Station)- Place Georges Teissier, 29680 Roscoff, France & Centre Ifremer de Brest - Pointe du Diable, 29280 Plouzané, France;3. IFREMER, Unité de Recherche Lagons, Ecosystèmes et Aquaculture Durable (LEAD-NC), BP 2059, Nouméa 98846, New Caledonia, France;4. IFREMER, LER/N, Avenue du Général de Gaulle, 14520 Port en Bessin, France;5. IFREMER, Dyneco/PELAGOS, BP 70, 29280 Plouzané, France;1. Department of Biology, Western University, London, Ontario, N6A 5B7, Canada;2. Interfaculty Program in Public Health, Schulich School of Medicine and Dentistry, London, Ontario, N6G 2M1, Canada;3. Environmental and Fisheries Science Division, National Marine Fisheries Service, Northwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Seattle, WA 98112, USA;4. Estuary and Ocean Science Center, San Francisco State University, Tiburon, CA 94920-1205, USA;5. School of Marine Science, University of Maine, Orono, ME 04469, USA;1. Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, College of Life Science, South China Normal University, 55 of Zhongshan West Avenue, Guangzhou 510631, PR China;2. Guangdong Provincial key Laboratory of Healthy and Safe Aquaculture, College of Life Science, South China Normal University, 55 of Zhongshan West Avenue, Guangzhou 510631, PR China;3. Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83S, Copenhagen, Denmark;4. Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, Kota Samarahan 94300, Malaysia;5. Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, PR China;1. Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83S, DK-1307 Copenhagen K, Denmark;2. National Institute of Aquatic Resources, DTU Aqua, Section for Oceanecology and Climate, Technical University of Denmark, DTU, Kavalergården 6, DK-2920 Charlottenlund, Denmark;3. Greenland Climate Research Centre, Greenland Institute of Natural Resources, Nuuk, Greenland;4. Alfred Wegener Institut-Helmholtz Zentrum für Polar- und Meeresforschung, Ökologische Chemie, Am Handelshafen 12, 27570 Bremerhaven, Germany;5. Department of Bioscience, Roskilde, Aarhus University, Frederiksborgvej 399, PO Box 358, 4000 Roskilde, Denmark;1. Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83S, 1307 Copenhagen, Denmark;2. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany;3. Helmholtz Institute for Functional Marine Biodiversity (HIFMB), Ammerländer Heerstraße 231, 23129 Oldenburg, Germany;4. Technical and Environmental Administration, Environmental Protection Department, Water and EIA, The City of Copenhagen, Njalsgade 13, 2300 Copenhagen S, Denmark;5. College of Life Sciences, Northwest A & F University, Yangling 712100, Shaanxi, China;6. Centre for Ocean Life, Technical University of Denmark, Building 202 Kemitorvet, Lyngby Campus, 2800 Kgs. Lyngby, Denmark;7. Department of Marine Sciences, University of Gothenburg, Carl Skottsbergsgata 22B, SE 450 30 Göteborg, Sweden;8. National Institute of Aquatic Resources, Technical University of Denmark, Building 201 Kemitorvet, Lyngby Campus, 2800 Kgs. Lyngby, Denmark;1. Ifremer, DYNECO PELAGOS, F-29280 Plouzané, France;2. IFREMER, Station de Biologie Marine, Place de la Croix, BP 40537, F-29185 Concarneau Cedex, France;3. Normandie University, UNICAEN, 14000 Caen, France;4. UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UCBN, 14032 Caen, France |
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| Abstract: | Toxic species of the diatom genus Pseudo-nitzschia, observed worldwide from coastal waters to the open ocean, produce the neurotoxin domoic acid (DA). DA is an important environmental and economic hazard due to shellfish contamination with subsequent effects on higher trophic levels. Previous research has demonstrated that, among other environmental factors, salinity influences the abundance and toxicity of Pseudo-nitzschia. In this study, the environmental factors driving the growth of Pseudo-nitzschia and the production of dissolved DA (dDA) in North Inlet estuary were examined. The effect of salinity on the growth inhibition of phytoplankton induced by the initial presence as well as by an addition of dDA was also assessed. Initially, the diatom abundance was negatively correlated with the abundance of Pseudo-nitzschia and with the concentration of dDA. With the addition of a concentrated solution of dDA, the percent inhibition of cryptophytes and diatoms was significantly correlated with salinity and suggested a higher sensitivity to dDA at extreme salinities. These results emphasize the importance of salinity in assessing the properties of DA and potentially of other phycotoxins on phytoplankton. |
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| Keywords: | Allelopathy CHEMTAX Domoic acid Salinity |
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