1
|
Fabri-Ruiz S, Berdalet E, Ulses C, Somot S, Vila M, Lemée R, Irisson JO. Harmful Ostreopsis cf. ovata blooms could extend in time span with climate change in the Western Mediterranean Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 947:174726. [PMID: 39002574 DOI: 10.1016/j.scitotenv.2024.174726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 07/09/2024] [Accepted: 07/10/2024] [Indexed: 07/15/2024]
Abstract
Fast environmental changes and high coastal human pressures and impacts threaten the Mediterranean Sea. Over the last decade, recurrent blooms of the harmful dinoflagellate Ostreopsis cf. ovata have been recorded in many Mediterranean beaches. These microalgae produce toxins that affect marine organisms and human health. Understanding the environmental conditions that influence the appearance and magnitude of O. cf. ovata blooms, as well as how climate change will modify its future distribution and dynamics, is crucial for predicting and managing their effects. This study investigates whether the spatio-temporal distribution of this microalga and the frequency of its blooms could be altered in future climate change scenarios in the Mediterranean Western basin. For the first time, an ecological habitat model (EHM) is forced by physico-chemical climate change simulations at high-resolution, under the strong greenhouse gas emission trajectory (RCP8.5). It allows to characterize how O. cf. ovata may respond to projected conditions and how its distribution could shift over a wide spatial scale, in this plausible future. Before being applied to the EHM, future climate simulations are further refined by using a statistical adaptation method (Cumulative Distribution Function transform) to improve the predictions robustness. Temperature (optimum 23-26 °C), high salinity (>38 psu) and high inorganic nutrient concentrations (nitrate >0.25 mmol N·m-3 and phosphate >0.035 mmol P·m-3) drive O. cf. ovata abundances. High spatial disparities in future abundances are observed. Namely, O. cf. ovata abundances could increase on the Mediterranean coasts of France, Spain and the Adriatic Sea while a decrease is expected in the Tyrrhenian Sea. The bloom period could be extended, starting earlier and continuing later in the year. From a methodological point of view, this study highlights best practices of EHMs in the context of climate change to identify sensitive areas for current and future harmful algal blooms.
Collapse
Affiliation(s)
- S Fabri-Ruiz
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-Mer, France; DECOD, L'Institut Agro, IFREMER, INRAE, 44000 Nantes, France.
| | - E Berdalet
- Institute of Marine Sciences (ICM-CSIC), Barcelona, Spain
| | - C Ulses
- Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Université de Toulouse, CNES, CNRS, IRD, UT3, Toulouse, France
| | - S Somot
- CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
| | - M Vila
- Institute of Marine Sciences (ICM-CSIC), Barcelona, Spain
| | - R Lemée
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-Mer, France
| | - J-O Irisson
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-Mer, France
| |
Collapse
|
2
|
Monserrat M, Asnaghi V, Verdura J, Meroni L, Lemée R, Rossi AM, Romero G, Priouzeau F, Chiantore M, Mangialajo L. From micro to mesoscale: Understanding the influence of macroalgal communities on Ostreopsis Schmidt blooms. HARMFUL ALGAE 2024; 136:102650. [PMID: 38876526 DOI: 10.1016/j.hal.2024.102650] [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: 08/05/2023] [Revised: 05/08/2024] [Accepted: 05/19/2024] [Indexed: 06/16/2024]
Abstract
Harmful Algal Blooms (HABs) are increasing in temperate areas, and the growth rates of benthic harmful dinoflagellates may be favoured in the context of global climate change. Benthic dinoflagellates, including species belonging to the Ostreopsis Schmidt genus, are known to develop on the surface of macroalgae and different macroalgal morphotypes and communities could host higher or lower cell abundances. The physical structure of the macroalgal substrate at the small scale (cm, microhabitat scale) and the structural complexity of the macroalgal community at the medium scale (few m, mesohabitat scale) could play a relevant role in bloom facilitation: the hypothesis that Ostreopsis species could be associated with macroalgal turfs and shrubs, structurally less complex communities than canopy-forming macroalgae, is especially under discussion and, if confirmed, could link bloom occurrence to regime shifts in temperate ecosystems. The present study, performed in two locations of the Ligurian Sea (Rochambeau, France and Vernazzola, Italy) aimed at understanding marine vegetation's role at the micro and mesohabitat scales in controlling the distribution and abundance of Ostreopsis. The abundance of the microalgal cells was quantified at different spatial scales, from cm to a few m, on different macroalgal species and communities, including artificial substrates, to tease apart the micro and mesohabitat effects. The results obtained show a high spatio-temporal variability, potentially hiding habitat-related patterns. The substrate's preferences diminish when cell abundances are very high, as in the case of Rochambeau, while in presence of moderate cell abundances as in Vernazzola or the first phases of blooms, it is possible to appreciate differences in abundances among substrates (in our study, Dictyota fasciola (Roth) Lamouroux supporting higher abundances). Our results open new research topics such as the study of blooms at a larger scale (macrohabitat) and testing different sampling methods to standardise the cells' abundances independently on the substrate.
Collapse
Affiliation(s)
- M Monserrat
- Université Côte d'Azur, CNRS, ECOSEAS, France; CoNISMa, Piazzale Flaminio 9, Roma Italy.
| | - V Asnaghi
- CoNISMa, Piazzale Flaminio 9, Roma Italy; DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy; National Biodiversity Future Center, 90133 Palermo, Italy
| | - J Verdura
- Université Côte d'Azur, CNRS, ECOSEAS, France; Departament de Biologia Marina, Institut de Ciències del Mar (CSIC), Barcelona, Spain
| | - L Meroni
- CoNISMa, Piazzale Flaminio 9, Roma Italy; DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy; National Biodiversity Future Center, 90133 Palermo, Italy
| | - R Lemée
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, France
| | - A M Rossi
- DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy
| | - G Romero
- Université Côte d'Azur, CNRS, ECOSEAS, France
| | - F Priouzeau
- Université Côte d'Azur, CNRS, ECOSEAS, France
| | - M Chiantore
- CoNISMa, Piazzale Flaminio 9, Roma Italy; DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy; National Biodiversity Future Center, 90133 Palermo, Italy
| | | |
Collapse
|
3
|
Drouet K, Lemée R, Guilloud E, Schmitt S, Laza-Martinez A, Seoane S, Boutoute M, Réveillon D, Hervé F, Siano R, Jauzein C. Ecophysiological responses of Ostreopsis towards temperature: A case study of benthic HAB facing ocean warming. HARMFUL ALGAE 2024; 135:102648. [PMID: 38830713 DOI: 10.1016/j.hal.2024.102648] [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: 11/03/2023] [Revised: 04/05/2024] [Accepted: 05/15/2024] [Indexed: 06/05/2024]
Abstract
Reports of the benthic dinoflagellate Ostreopsis spp. have been increasing in the last decades, especially in temperate areas. In a context of global warming, evidences of the effects of increasing sea temperatures on its physiology and its distribution are still lacking and need to be investigated. In this study, the influence of temperature on growth, ecophysiology and toxicity was assessed for several strains of O. cf. siamensis from the Bay of Biscay (NE Atlantic) and O. cf. ovata from NW Mediterranean Sea. Cultures were acclimated to temperatures ranging from 14.5 °C to 32 °C in order to study the whole range of each strain-specific thermal niche. Acclimation was successful for temperatures ranging from 14.5 °C to 25 °C for O. cf. siamensis and from 19 °C to 32 °C for O. cf. ovata, with the highest growth rates measured at 22 °C (0.54-1.06 d-1) and 28 °C (0.52-0.75 d-1), respectively. The analysis of cellular content of pigments and lipids revealed some aspects of thermal acclimation processes in Ostreopsis cells. Specific capacities of O. cf. siamensis to cope with stress of cold temperatures were linked with the activation of a xanthophyll cycle based on diadinoxanthin. Lipids (neutral reserve lipids and polar ones) also revealed species-specific variations, with increases in cellular content noted under extreme temperature conditions. Variations in toxicity were assessed through the Artemia franciscana bioassay. For both species, a decrease in toxicity was observed when temperature dropped under the optimal temperature for growth. No PLTX-like compounds were detected in O. cf. siamensis strains. Thus, the main part of the lethal effect observed on A. franciscana was dependent on currently unknown compounds. From a multiclonal approach, this work allowed for defining specificities in the thermal niche and acclimation strategies of O. cf. siamensis and O. cf. ovata towards temperature. Potential impacts of climate change on the toxic risk associated with Ostreopsis blooms in both NW Mediterranean Sea and NE Atlantic coast is further discussed, taking into account variations in the geographic distribution, growth abilities and toxicity of each species.
Collapse
Affiliation(s)
- K Drouet
- Sorbonne Université, CNRS - Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, 06230, France; Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France.
| | - R Lemée
- Sorbonne Université, CNRS - Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, 06230, France
| | - E Guilloud
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
| | - S Schmitt
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
| | - A Laza-Martinez
- Department of Plant Biology and Ecology, University of the Basque Country UPV/EHU, Leioa, 48940, Spain; Research Centre for Experimental Marine Biology and Biotechnology (Plentzia Marine Station, PiE- UPV/EHU), Plentzia, 48620, Spain
| | - S Seoane
- Department of Plant Biology and Ecology, University of the Basque Country UPV/EHU, Leioa, 48940, Spain; Research Centre for Experimental Marine Biology and Biotechnology (Plentzia Marine Station, PiE- UPV/EHU), Plentzia, 48620, Spain
| | - M Boutoute
- Sorbonne Université, CNRS - Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, 06230, France
| | - D Réveillon
- Ifremer, PHYTOX, Laboratoire METALG, F-44000, Nantes, France
| | - F Hervé
- Ifremer, PHYTOX, Laboratoire METALG, F-44000, Nantes, France
| | - R Siano
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
| | - C Jauzein
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
| |
Collapse
|
4
|
Grigoriyan A, Lorini ML, Figueiredo MDSL, Corrêa Almada EV, Nascimento SM. Effects of culture conditions on the growth of the benthic dinoflagellates Ostreopsis cf. ovata, Prorocentrum lima and Coolia malayensis (Dinophyceae): A global review. HARMFUL ALGAE 2024; 132:102565. [PMID: 38331537 DOI: 10.1016/j.hal.2023.102565] [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: 04/29/2023] [Revised: 11/30/2023] [Accepted: 12/23/2023] [Indexed: 02/10/2024]
Abstract
Benthic dinoflagellates produce potent toxins that may negatively affect humans and the marine biota. Understanding the factors that stimulate their growth is important for management strategies and to reduce their potential negative impacts. Laboratory cultures have been extensively used to study microalgae physiology and characterize life cycles, nutrition, growth rates, among other processes. A systematic review of the literature on the growth parameters of the benthic dinoflagellates Ostreopsis cf. ovata, Prorocentrum lima species complex and Coolia malayensis obtained in laboratory cultures of strains isolated from all over the world was performed. The effects of temperature, light intensity, photoperiod, salinity and culture media on the growth rate of these species were evaluated using multiple regressions and a model selection approach, based on the Akaike Information Criteria (AIC). The potential effects of the initial culture abundance and the media volume used on the growth of the species were also assessed. Data from 50 articles (25 for O. cf. ovata, 21 for P. lima and 6 for C. malayensis), resulting in 399 growth parameter values (growth rate, doubling time and maximum yield) were compiled in a database. The genetic clades of O. cf. ovata and P. lima species complex were also noted. Growth rate was the most frequently reported growth parameter for the three species, and 127 values were retrieved for O. cf. ovata, 90 for P. lima and 56 for C. malayensis. Temperature was the factor that best explained the growth response of P. lima and C. malayensis, whereas for O. cf. ovata, temperature and salinity were equally important. Light intensity and photoperiod were included among the six best models for the studied species but presented a weaker effect on growth. Given the observed and future projected climate change, increasing ocean temperature will promote the growth of these species, likely leading to an expansion of their impacts on ecosystems and human health. The use of common garden experiments using multiple strains from different geographic domains, particularly addressing underrepresented lineages is recommended, as they will provide more balanced insight regarding the species physiological responses to environmental drivers.
Collapse
Affiliation(s)
- Alexandra Grigoriyan
- Laboratório de Microalgas Marinhas, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil
| | - Maria Lucia Lorini
- Laboratório de Ecologia e Biogeografia, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil
| | - Marcos de Souza Lima Figueiredo
- Laboratório de Ecologia e Biogeografia, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil
| | | | - Silvia M Nascimento
- Laboratório de Microalgas Marinhas, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil.
| |
Collapse
|
5
|
Medina-Pérez NI, Cerdán-García E, Rubió F, Viure L, Estrada M, Moyano E, Berdalet E. Progress on the Link between Nutrient Availability and Toxin Production by Ostreopsis cf. ovata: Field and Laboratory Experiments. Toxins (Basel) 2023; 15:toxins15030188. [PMID: 36977079 PMCID: PMC10057244 DOI: 10.3390/toxins15030188] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
This study aimed to improve the understanding of the nutrient modulation of Ostreopsis cf. ovata toxin content. During the 2018 natural bloom in the NW Mediterranean, the total toxin content (up to ca. 57.6 ± 7.0 pg toxin cell−1) varied markedly. The highest values often coincided with elevated O. cf. ovata cell abundance and with low inorganic nutrient concentrations. The first culture experiment with a strain isolated from that bloom showed that cell toxin content was higher in the stationary than in the exponential phase of the cultures; phosphate- and nitrate-deficient cells exhibited similar cell toxin variability patterns. The second experiment with different conditions of nitrogen concentration and source (nitrate, urea, ammonium, and fertilizer) presented the highest cellular toxin content in the high-nitrogen cultures; among these, urea induced a significantly lower cellular toxin content than the other nutrient sources. Under both high- and low-nitrogen concentrations, cell toxin content was also higher in the stationary than in the exponential phase. The toxin profile of the field and cultured cells included ovatoxin (OVTX) analogues -a to -g and isobaric PLTX (isoPLTX). OVTX-a and -b were dominant while OVTX-f, -g, and isoPLTX contributed less than 1-2%. Overall, the data suggest that although nutrients determine the intensity of the O. cf. ovata bloom, the relationship of major nutrient concentrations, sources and stoichiometry with cellular toxin production is not straightforward.
Collapse
Affiliation(s)
- Noemí Inmaculada Medina-Pérez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Av. Diagonal 645, E-08028 Barcelona, Spain
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Elena Cerdán-García
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Francesc Rubió
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Laia Viure
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Marta Estrada
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Encarnación Moyano
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Av. Diagonal 645, E-08028 Barcelona, Spain
- Water Research Institute (IdRA), University of Barcelona, Montalegre 6, E-08001 Barcelona, Spain
| | - Elisa Berdalet
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
- Correspondence:
| |
Collapse
|
6
|
Rapid Biotic and Abiotic Transformation of Toxins produced by Ostreopsis. cf. ovata. Mar Drugs 2022; 20:md20120748. [PMID: 36547895 PMCID: PMC9787646 DOI: 10.3390/md20120748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/10/2022] [Accepted: 11/18/2022] [Indexed: 11/29/2022] Open
Abstract
The dinoflagellate Ostreopsis cf. ovata produces several families of toxic polyketides. Despite only a few field measurements of these phycotoxins in seawater and aerosols, they are believed to be responsible for dermatitis and the toxic inhalations reported during blooms of this species. Therefore, the stability of these compounds in seawater is essential to understanding the causes of these symptoms, however, this has never been assessed. In the current study, the optimization of a solid phase extraction (SPE) procedure was first performed to ensure the most efficient extraction of all phycotoxins known to be produced by this strain, including the recently described liguriatoxins. The SPE cartridge SDBL® under non acidified conditions offered the best option. The stability of the ovatoxins and the liguriatoxins under biotic and abiotic stress was assessed by exposing the spent medium of a culture of Ostreopsis cf. ovata to its bacterial consortium and natural sunlight. A rapid biotic transformation was detected for both families of compounds. When exposed to bacteria, the half-lives of the ovatoxins were reached before 10 h and at 36 h, 97% of these toxins had been transformed. The half-lives of the liguriatoxins were 10 h under these conditions. Photolysis (abiotic degradation) of the ovatoxins (T1/2 < 36 h) was faster than for the liguriatoxins (T1/2 > 62 h). Although none of the catabolites of these phycotoxins were thoroughly identified, an untargeted metabolomics approach combined with molecular networking highlighted the presence of several compounds exhibiting structural similarities with the ovatoxins. Additional work should confirm the preliminary findings on these potential ovatoxins’ catabolites and their biological properties. The rapid transformation of O. cf. ovata’s phycotoxins introduces questions concerning their presence in seawater and their dispersion in the sea spray aerosols. The compounds involved in the toxic inhalations and dermatitis often experienced by beachgoers may stem from the catabolites of these toxins or even unrelated and as yet unidentified compounds.
Collapse
|
7
|
Ibghi M, El Kbiach ML, Rijal Leblad B, Aboualaalaa H, Hervé F, Sibat M, Chair A, Masseret E, Maamour N, Daoudi M, Amzil Z, Laabir M. Occurrence of three dominant epibenthic dinoflagellates (Ostreopsis spp., Coolia monotis and Prorocentrum lima) in relation to biotic substrates and environmental factors in a highly dynamic ecosystem, the Strait of Gibraltar (Southwestern Mediterranean). ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:810. [PMID: 36129570 PMCID: PMC9490739 DOI: 10.1007/s10661-022-10426-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
No studies have been carried out on the benthic harmful algal blooms (BHABs) along the Strait of Gibraltar in the Mediterranean, and little is known about the diversity of blooming species. Here, epibenthic dinoflagellates were monitored at least biweekly over 18 months (May 2019-November 2020) in Oued Lihoud, Cap Malabata and Dalia on the thalli of five dominant macrophytes and in the water column. This is the first report on the seasonal distribution of BHAB species hosted by natural biotic substrates in the Strait of Gibraltar, which is known for high hydrodynamics, major entry of Atlantic waters and important maritime traffic. Three BHAB dinoflagellates were observed in the surveyed areas: Ostreopsis spp., Coolia monotis and Prorocentrum lima. The analysis of all data at the three sites showed that Dictyota dichotoma was the most favourable macroalgae host for these benthic dinoflagellates. The highest cell densities were observed in Cap Malabata for Ostreopsis spp. (2.7 × 105 cells/g fresh weight in September 2020), P. lima (4.57 × 104 cells/g FW in September 2020) and C. monotis (4.07 × 104 cells/g FW in June 2019). Phosphate and temperature were positively correlated to the abundances of the studied thermophilic BHAB species. In contrast, negative correlations were recorded with salinity, ammonium, nitrite, nitrate, DIN, nitrogen/phosphate ratio and suspended material, attesting of the complex relationships between environmental factors and BHAB species dynamic in each marine ecosystem. Toxin analyses of the natural phytoplankton assemblage during BHABs showed the presence of only lipophilic toxins, namely okadaic acid and dinophysistoxins produced by P. lima. These BHABs species have to be isolated to establish monoclonal cultures for ribotyping and ecophysiological investigations.
Collapse
Affiliation(s)
- Mustapha Ibghi
- Equipe de Biotechnologie Végétale, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
- National Institute of Fisheries Research (INRH), Tangier, Morocco
- CNRS, IRD, Ifremer, Montpellier University, MARBEC, Montpellier, France
| | | | | | - Hicham Aboualaalaa
- Equipe de Biotechnologie Végétale, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
- National Institute of Fisheries Research (INRH), Tangier, Morocco
- CNRS, IRD, Ifremer, Montpellier University, MARBEC, Montpellier, France
| | - Fabienne Hervé
- French Institute for Research and Exploitation of the sea (IFREMER), METALG laboratory, PHYTOX, F-44000, Nantes, France
| | - Manoella Sibat
- French Institute for Research and Exploitation of the sea (IFREMER), METALG laboratory, PHYTOX, F-44000, Nantes, France
| | - Adil Chair
- National Institute of Fisheries Research (INRH), Tangier, Morocco
- Marine Geosciences and Soil Sciences Laboratory, Faculty of Sciences, Chouaïb Dokkali University, El Jadida, Morocco
| | - Estelle Masseret
- CNRS, IRD, Ifremer, Montpellier University, MARBEC, Montpellier, France
| | - Niama Maamour
- National Institute of Fisheries Research (INRH), Tangier, Morocco
| | - Mouna Daoudi
- National Institute of Fisheries Research (INRH), Tangier, Morocco
| | - Zouher Amzil
- French Institute for Research and Exploitation of the sea (IFREMER), METALG laboratory, PHYTOX, F-44000, Nantes, France
| | - Mohamed Laabir
- CNRS, IRD, Ifremer, Montpellier University, MARBEC, Montpellier, France
| |
Collapse
|
8
|
Louzao MC, Vilariño N, Vale C, Costas C, Cao A, Raposo-Garcia S, Vieytes MR, Botana LM. Current Trends and New Challenges in Marine Phycotoxins. Mar Drugs 2022; 20:md20030198. [PMID: 35323497 PMCID: PMC8950113 DOI: 10.3390/md20030198] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 02/04/2023] Open
Abstract
Marine phycotoxins are a multiplicity of bioactive compounds which are produced by microalgae and bioaccumulate in the marine food web. Phycotoxins affect the ecosystem, pose a threat to human health, and have important economic effects on aquaculture and tourism worldwide. However, human health and food safety have been the primary concerns when considering the impacts of phycotoxins. Phycotoxins toxicity information, often used to set regulatory limits for these toxins in shellfish, lacks traceability of toxicity values highlighting the need for predefined toxicological criteria. Toxicity data together with adequate detection methods for monitoring procedures are crucial to protect human health. However, despite technological advances, there are still methodological uncertainties and high demand for universal phycotoxin detectors. This review focuses on these topics, including uncertainties of climate change, providing an overview of the current information as well as future perspectives.
Collapse
Affiliation(s)
- Maria Carmen Louzao
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
- Correspondence: (M.C.L.); (L.M.B.)
| | - Natalia Vilariño
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Carmen Vale
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Celia Costas
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Alejandro Cao
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Sandra Raposo-Garcia
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Mercedes R. Vieytes
- Departamento de Fisiologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain;
| | - Luis M. Botana
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
- Correspondence: (M.C.L.); (L.M.B.)
| |
Collapse
|
9
|
Monserrat M, Catania D, Asnaghi V, Chiantore M, Lemée R, Mangialajo L. The role of habitat in the facilitation of Ostreopsis spp. blooms. HARMFUL ALGAE 2022; 113:102199. [PMID: 35287932 DOI: 10.1016/j.hal.2022.102199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 01/05/2022] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
In recent decades, recurrent Ostreopsis spp. blooms have been recorded throughout the globe, causing public health issues and mass mortalities of invertebrates. Ostreopsis species are benthic and develop in shallow waters in close relation with a substrate, but possible substrate preferences are still ambiguous. Bloom develops on both living and dead substrates and several interacting biotic and abiotic factors acting at different spatial scales can potentially foster or regulate Ostreopsis spp. development. The objective of this review is to collect and summarize information on Ostreopsis spp. blooms related to the habitat at different spatial scales, in order to assess preferences and trends. References including Ostreopsis spp. samplings in the field were analysed in this review, as potentially including information about the micro- (substrate), meso‑ (community) and macrohabitat (ecosystem) related to Ostreopsis spp. blooms. The sampled substrate and the ecosystem where Ostreopsis spp. were collected were generally reported and described in the studies, while the description of the mesohabitat was rarely reported. Ostreopsis spp. were generally described as attached to biotic substrates and in particular, macroalgae, even in studies conducted in coral reefs, where macroalgae are generally not dominant (but they can be in case of coral reef degradation). In both temperate and tropical areas, Ostreopsis spp. were mostly sampled on algal species usually forming medium or low complexity communities (erect or turf-forming algae), often characteristic from post-regime shift scenarios, and rarely on canopy-forming species (such as fucoids and kelps). This literature review highlights the need of collecting more information about the mesohabitat where important Ostreopsis spp. blooms develop, as much as of the underlying mechanisms driving eventual differences on Ostreopsis spp. abundances. This knowledge would allow a better risk assessment of Ostreopsis spp. blooms, identifying areas at high risk on the base of the benthic habitats.
Collapse
Affiliation(s)
- Margalida Monserrat
- Université Côte d'Azur, CNRS, UMR 7035 ECOSEAS, Nice, France; Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-mer, France; Federative Research Institute - Marine Resources, Université Côte d'Azur, Nice, France.
| | - Daniela Catania
- Université Côte d'Azur, CNRS, UMR 7035 ECOSEAS, Nice, France; Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-mer, France
| | | | | | - Rodolphe Lemée
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-mer, France
| | - Luisa Mangialajo
- Université Côte d'Azur, CNRS, UMR 7035 ECOSEAS, Nice, France; Federative Research Institute - Marine Resources, Université Côte d'Azur, Nice, France
| |
Collapse
|
10
|
Lenzo D, Pezzolesi L, Samorì C, Rindi F, Pasteris A, Pistocchi R, Colangelo MA. Allelopathic interactions between phytobenthos and meiofaunal community in an Adriatic benthic ecosystem: Understanding the role of aldehydes and macroalgal structural complexity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150827. [PMID: 34627880 DOI: 10.1016/j.scitotenv.2021.150827] [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: 07/27/2021] [Revised: 09/17/2021] [Accepted: 10/02/2021] [Indexed: 06/13/2023]
Abstract
Macroalgae produce several allelopathic substances, including polyunsaturated aldehydes (PUAs), which may inhibit photosynthesis and growth rates of other algal species, and grazing. Additionally, macroalgal structural complexity is an important factor in determining abundance patterns and size structure of epiphytic organisms. In this study the PUAs production of two Mediterranean macroalgae, Dictyopteris polypodioides, (DP, Phaeophyceae, Dictyotales) and Cystoseira compressa (CC, Phaeophyceae, Fucales), was characterized to clarify the relationships between the meiobenthic and microphytobenthic communities. Results showed a higher PUAs production and a diverse qualitative profile for DP, which reported long-chain compounds (i.e. C14-C16) as main aldehydes, than CC, with the short-chain C6:2 as the main compound, as well as variability among sampling times. A clear separation of the meiofauna and microphytobenthos assemblages was found for the macroalgae, but with different temporal trends. Dissimilarities were due to five microalgal orders, namely Naviculales, Lyrellales, Gonyaulacales (i.e. Ostreopsis), Bacillariales, and Licmophorales, and to the meiofaunal groups nematodes, copepods, and copepod nauplii, which were more abundant on DP than on CC. Results indicate that macroalgal complexity is a major determinant of the meiofaunal community structure (accounting for 26% of the variation), rather than PUAs production itself (17%). PUAs effects seem species-specific, thus affecting some grazers instead of the entire community. Conversely, microphytobenthos affected the meiofauna assemblages, particularly harpacticoids, confirming the role of these organisms as the primary food source of all marine food chain producers. Since PUAs are produced also by several epiphytic diatoms, the understanding of their effects on the community structure and on the relationships among taxa in the field is complicated and requires further in-depth investigations in simplified systems (i.e. microcosms).
Collapse
Affiliation(s)
- Denise Lenzo
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali - Università di Bologna, via Sant'Alberto 163, 48123 Ravenna, Italy
| | - Laura Pezzolesi
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali - Università di Bologna, via Sant'Alberto 163, 48123 Ravenna, Italy.
| | - Chiara Samorì
- Dipartimento di Chimica "Giacomo Ciamician" - Università di Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Fabio Rindi
- Dipartimento di Scienze della Vita e dell'Ambiente - Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy
| | - Andrea Pasteris
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali - Università di Bologna, via Sant'Alberto 163, 48123 Ravenna, Italy
| | - Rossella Pistocchi
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali - Università di Bologna, via Sant'Alberto 163, 48123 Ravenna, Italy
| | - Marina Antonia Colangelo
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali - Università di Bologna, via Sant'Alberto 163, 48123 Ravenna, Italy
| |
Collapse
|
11
|
Drouet K, Jauzein C, Gasparini S, Pavaux AS, Berdalet E, Marro S, Davenet-Sbirrazuoli V, Siano R, Lemée R. The benthic toxic dinoflagellate Ostreopsis cf. ovata in the NW Mediterranean Sea: Relationship between sea surface temperature and bloom phenology. HARMFUL ALGAE 2022; 112:102184. [PMID: 35144819 DOI: 10.1016/j.hal.2022.102184] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/24/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Blooms of the toxic benthic dinoflagellate Ostreopsis cf. ovata can induce ecological and human health issues in certain temperate areas. In order to prevent these negative effects, long-term monitoring studies of O. cf. ovata blooms have been conducted in several impacted areas to have a comprehensive understanding of bloom dynamics and efficient tools for risk management. O. cf. ovata blooms were monitored every summer (from mid-June to the end of August) on five identified sites in Larvotto beach (Monaco, NW Mediterranean Sea), between 2007 and 2019. This time-series represents one of the largest time-series in the world describing blooms of this species. Bloom phenological features (timing, duration, maximum cell abundance and growth rate), were found to be highly variable throughout the studied period, and were analyzed as a function of different hydroclimatic parameters, including sea surface temperature (SST). The highest net growth rates were related to temperatures ranging between 21°C and 25°C, and did not coincide with maximal temperature records (27.5°C). Such results suggest that, although global warming possibly influences the expansion of O. cf. ovata from tropical to temperate waters, the definite impact of temperature on bloom dynamics might be more complex than a simple facilitation factor for algal growth, at least in NW Mediterranean waters. Furthermore, monthly SST anomalies calculated over this 13-year survey showed a strong positive correlation between spring SST positive anomalies and the bloom starting date, indicating that blooms occurred earlier in the season when spring SSTs were warmer than usual. Overall results provide tools to modelers and managers who are facing crucial challenges to predict the distribution and phenology of O. cf. ovata blooms in European coastal waters, moreover in a context of global warming.
Collapse
Affiliation(s)
- K Drouet
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, FRANCE; Ifremer, DYNECO Pelagos, F-29280 Plouzané, FRANCE.
| | - C Jauzein
- Ifremer, DYNECO Pelagos, F-29280 Plouzané, FRANCE
| | - S Gasparini
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, FRANCE
| | - A-S Pavaux
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, FRANCE
| | - E Berdalet
- Institut de Ciènces del Mar (CSIC), Barcelona, SPAIN
| | - S Marro
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, FRANCE
| | | | - R Siano
- Ifremer, DYNECO Pelagos, F-29280 Plouzané, FRANCE
| | - R Lemée
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, FRANCE
| |
Collapse
|
12
|
Gémin MP, Bertrand S, Séchet V, Amzil Z, Réveillon D. Combined effects of temperature and light intensity on growth, metabolome and ovatoxin content of a Mediterranean Ostreopsis cf. ovata strain. HARMFUL ALGAE 2021; 106:102060. [PMID: 34154782 DOI: 10.1016/j.hal.2021.102060] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 05/18/2021] [Accepted: 05/22/2021] [Indexed: 06/13/2023]
Abstract
Ostreopsis cf. ovata is a benthic and ovatoxin-producing dinoflagellate proliferating yearly along the Mediterranean coasts where blooms have been related to human illness and unusual mortality of marine organisms. The spreading of O. cf. ovata in this temperate area has been linked to global changes and its consequences such as the increase of temperature or light intensities. In the present study, an experimental design using batch cultures of pre-acclimated cells of a strain of O. cf. ovata isolated from Villefranche-sur-Mer (NW Mediterranean Sea, France), was implemented to investigate the combined effect of temperature (23, 27 and 30 °C) and light intensity (200, 400 and 600 µmol m-2s-1) on the growth, metabolome and OVTX content. Both light intensity and temperature affected the growth as significantly higher growth rates were obtained under 400 and 600 µmol m-2s-1 while the maximum values were obtained at 27 °C (0.48 d-1). Metabolomic analyses highlighted a clear effect only for temperature that may correspond to two different strategies of acclimation to suboptimal temperatures. Significant features (such as carotenoid and lipids) modified by the temperature and/or light conditions were annotated. Only temperature induced a significant change of OVTX content with higher values measured at the lowest temperature of 23 °C (29 - 36 pg cell-1). In a context of global changes, these results obtained after acclimation suggest that the increase of temperature might favor the proliferation of less toxic cells. However, in the light of the intraspecific variability of O. cf. ovata, further studies will be necessary to test this hypothesis. This study also highlighted the lack of knowledge about the metabolome composition of such non-model organisms that impairs data interpretation. There is a need to study more deeply the metabolome of toxic dinoflagellates to better understand how they can acclimate to a changing environment.
Collapse
Affiliation(s)
| | - Samuel Bertrand
- Faculté de Pharmacie, Université de Nantes, EA 2160-Mer Molécules Santé, F-44035 Nantes, France; ThalassOMICS Metabolomics Facility, Plateforme Corsaire, Biogenouest, 44035 Nantes, France.
| | - Véronique Séchet
- IFREMER, DYNECO, Phycotoxins Laboratory, F-44000 Nantes, France.
| | - Zouher Amzil
- IFREMER, DYNECO, Phycotoxins Laboratory, F-44000 Nantes, France.
| | - Damien Réveillon
- IFREMER, DYNECO, Phycotoxins Laboratory, F-44000 Nantes, France.
| |
Collapse
|
13
|
Lounas R, Kasmi H, Chernai S, Amarni N, Hamdi B. Dynamics of the genus Ostreopsis (Gonyaulacales, Dinophyceae) in a Mediterranean fish farm. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:333. [PMID: 33970342 DOI: 10.1007/s10661-021-09117-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 05/02/2021] [Indexed: 06/12/2023]
Abstract
This study revealed the dynamics of the genus Ostreopsis in the south-western Mediterranean Sea fish farm during the 2016 and 2017 summers. This phytoplankton is known to produce palytoxin-like compounds, listed among the most potent marine toxins known, and can pose a serious concern for humans in the Mediterranean area. Principal component analysis (PCA) explained the significance of temperature, salinity, and dissolved inorganic nitrogen in the proliferation of this toxic dinoflagellate. The peak of the Ostreopsis sp. (6.34 × 103 cells L-1) was recorded at 28.4 °C, at a salinity of 38.3 PSU, and the dissolved inorganic nitrogen had a value of 0.60 μmol L-1. Our results highlight the importance of monitoring the proliferation of this harmful dinoflagellate in southern Mediterranean waters.
Collapse
Affiliation(s)
- Ryhane Lounas
- Laboratory of Conservation and Valorization of Marine Resources, National Higher School of Marine Science and Coastal Management (ENSSMAL), University Campus of Dely Ibrahim, Bois des Cars, 16320, Algiers, Algeria.
| | - Hamza Kasmi
- Sécurité de Convoyage de Fonds Et de Produits Sensibles Et/Ou Dangereux, SGS Centre, Bois des cars III Villa n°96 Dely-Ibrahim, 16320, Algiers, Algeria
| | - Safia Chernai
- Laboratory of Conservation and Valorization of Marine Resources, National Higher School of Marine Science and Coastal Management (ENSSMAL), University Campus of Dely Ibrahim, Bois des Cars, 16320, Algiers, Algeria
| | - Nadia Amarni
- Laboratory of Conservation and Valorization of Marine Resources, National Higher School of Marine Science and Coastal Management (ENSSMAL), University Campus of Dely Ibrahim, Bois des Cars, 16320, Algiers, Algeria
| | - Boualem Hamdi
- Laboratory of Conservation and Valorization of Marine Resources, National Higher School of Marine Science and Coastal Management (ENSSMAL), University Campus of Dely Ibrahim, Bois des Cars, 16320, Algiers, Algeria
| |
Collapse
|
14
|
Toxin profile of Ostreopsis cf. ovata from Portuguese continental coast and Selvagens Islands (Madeira, Portugal). Toxicon 2020; 181:91-101. [DOI: 10.1016/j.toxicon.2020.04.102] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/31/2020] [Accepted: 04/25/2020] [Indexed: 01/27/2023]
|
15
|
Zhou J, Zhang BY, Yu K, Du XP, Zhu JM, Zeng YH, Cai ZH. Functional profiles of phycospheric microorganisms during a marine dinoflagellate bloom. WATER RESEARCH 2020; 173:115554. [PMID: 32028248 DOI: 10.1016/j.watres.2020.115554] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/14/2019] [Accepted: 01/25/2020] [Indexed: 06/10/2023]
Abstract
Harmful algal blooms (HABs) are an ecological concern but relatively few studies have investigated the functional potential of bacterioplankton over a complete algal bloom cycle, which is critical for determining their contribution to the fate of algal blooms. To address this point, we carried out a time-series metagenomic analysis of the functional features of microbial communities at three different Gymnodinium catenatum bloom stages (pre-, peak-, and post-bloom). Different microbial composition were observed during the blooming stages. The environmental parameters and correlation networks co-contribute to microbial variability, and the former explained 38.4% of total variations of the bacterioplankton community composition. Functionally, a range of pathways involved in carbon, nitrogen, phosphorus and sulfur cycling were significantly different during the various HAB stages. Genes associated with carbohydrate-active enzymes, denitrification, and iron oxidation were enriched at the pre-bloom stage; genes involved in reductive citrate cycle for carbon fixation, carbon degradation, nitrification and phosphate transport were enhanced at the peak stage; and relative gene abundance related to sulfur oxidation, vitamin synthesis, and iron transport and storage was increased at the post-bloom stage. The ecological linkage analysis has shown that microbial functional potential especially the C/P/Fe metabolism were significantly linked to the fate of the algal blooms. Taken together, our results demonstrated that microorganisms displayed successional patterns not only at the community level, but also in the metabolic potential on HAB's progression. This work contributes to a growing understanding of microbial structural elasticity and functional plasticity and shed light on the potential mechanisms of microbial-mediated HAB trajectory.
Collapse
Affiliation(s)
- Jin Zhou
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China; The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Bo-Ya Zhang
- The School of Environment and Energy, Graduate School at Shenzhen, Peking University, Guangdong Province, Shenzhen, China
| | - Ke Yu
- The School of Environment and Energy, Graduate School at Shenzhen, Peking University, Guangdong Province, Shenzhen, China
| | - Xiao-Peng Du
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China; The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Jian-Ming Zhu
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China; The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Yan-Hua Zeng
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China; The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Zhong-Hua Cai
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China; The Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.
| |
Collapse
|
16
|
Gémin MP, Réveillon D, Hervé F, Pavaux AS, Tharaud M, Séchet V, Bertrand S, Lemée R, Amzil Z. Toxin content of Ostreopsis cf. ovata depends on bloom phases, depth and macroalgal substrate in the NW Mediterranean Sea. HARMFUL ALGAE 2020; 92:101727. [PMID: 32113596 DOI: 10.1016/j.hal.2019.101727] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
Over the last fifteen years, blooms of the genus Ostreopsis have been reported more frequently and at higher abundances in the Mediterranean area. Ostreopsis cf. ovata is known to produce ovatoxins (OVTXs), structural analogues of palytoxin, which is one of the most potent non-polymeric toxins. However, the production of OVTXs is poorly characterized in situ. The present study focuses on toxin content and profile according to the bloom phase during summer 2017 in Villefranche-sur-Mer, France (NW Mediterranean Sea), depth (from 0.5 to 5 m) and three different macroalgal substrates of this epiphytic dinoflagellate (Padina pavonica, Dictyota spp. and Halopteris scoparia). Ovatoxin quantification of all samples was performed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The bloom started at the end of June and declined in mid-July, showing the typical seasonal pattern of the NW Mediterranean Sea area. The peak was observed on the 10 July with 1.8 × 106 cells/g FW and 1.7 × 104 cells/L for benthic and planktonic cells, respectively. Total toxin content of cells, collected using artificial substrates, increased during the exponential and stationary growth phases. After reaching a maximum concentration of 9.2 pg/cell on 18 July, toxin concentration decreased and remained stable from 25 July until the end of monitoring. A decreasing trend of the abundance and of the associated total toxin content was noted with depth. Finally, the decreasing order of maximal epiphytic concentration of O. cf. ovata was: Dictyota spp. (8.3 × 105 cells/g FW), H. scoparia (3.1 × 105 cells/g FW) and P. pavonica (1.6 × 105 cells/g FW). Interestingly, the highest OVTX quota was obtained in cells present on Halopteris scoparia, then on Dictyota spp. and Padina pavonica. This suggests that the nature of the macroalgal substrate influences both growth and toxin production of O. cf. ovata and further work will be required to understand the underlying mechanisms (e.g., competition for nutrition, pH or allelopathic interaction). However, the toxin profiles (i.e., the proportion of each ovatoxin analogue) were not affected by any of the studied parameters (bloom phase, depth, macroalgae or artificial substrates).
Collapse
Affiliation(s)
| | | | - Fabienne Hervé
- IFREMER - Phycotoxins Laboratory, F- 44311 Nantes 03, France
| | - Anne-Sophie Pavaux
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, UMR 7093, BP 28, F-06230 Villefranche-sur-Mer, France
| | - Maxime Tharaud
- IFREMER - Phycotoxins Laboratory, F- 44311 Nantes 03, France
| | | | - Samuel Bertrand
- Groupe Mer, Molécules, Santé-EA 2160, UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes, Nantes-cedex 1 44035, France
| | - Rodolphe Lemée
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, UMR 7093, BP 28, F-06230 Villefranche-sur-Mer, France
| | - Zouher Amzil
- IFREMER - Phycotoxins Laboratory, F- 44311 Nantes 03, France
| |
Collapse
|
17
|
Ostreopsis cf. ovata (Dinophyceae) Molecular Phylogeny, Morphology, and Detection of Ovatoxins in Strains and Field Samples from Brazil. Toxins (Basel) 2020; 12:toxins12020070. [PMID: 31979144 PMCID: PMC7076807 DOI: 10.3390/toxins12020070] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 01/01/2019] [Indexed: 12/20/2022] Open
Abstract
Recurrent blooms of Ostreopsis cf. ovata have been reported in Brazil and the Mediterranean Sea with associated ecological, and in the latter case, health impacts. Molecular data based on the D1–D3 and D8–D10 regions of the LSU rDNA and ITS loci, and the morphology of O. cf. ovata isolates and field populations from locations along the Brazilian tropical and subtropical coastal regions and three oceanic islands are presented. Additional ITS sequences from three single cells from the tropical coast are provided. Toxin profiles and quantities of PLTX and their analogues; OVTXs; contained in cells from two clonal cultures and two field blooms from Rio de Janeiro were investigated. Morphology was examined using both light and epifluorescence microscopy. Morphometric analysis of different strains and field populations from diverse locations were compared. Molecular analysis showed that six of the seven sequences grouped at the large “Atlantic/Mediterranean/Pacific” sub-clade, while one sequence branched in a sister clade with sequences from Madeira Island and Greece. The toxin profile of strains and bloom field samples from Rio de Janeiro were dominated by OVTX-a and -b, with total cell quotas (31.3 and 39.3 pg cell−1) in the range of that previously reported for strains of O. cf. ovata.
Collapse
|
18
|
Tester PA, Litaker RW, Berdalet E. Climate change and harmful benthic microalgae. HARMFUL ALGAE 2020; 91:101655. [PMID: 32057343 DOI: 10.1016/j.hal.2019.101655] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 06/10/2023]
Abstract
Sea surface temperatures in the world's oceans are projected to warm by 0.4-1.4 °C by mid twenty-first century causing many tropical and sub-tropical harmful dinoflagellate genera like Gambierdiscus, Fukuyoa and Ostreopsis (benthic harmful algal bloom species, BHABs) to exhibit higher growth rates over much of their current geographic range, resulting in higher population densities. The primary exception to this trend will be in the tropics where temperatures exceed species-specific upper thermal tolerances (30-31 °C) beyond which growth slows significantly. As surface waters warm, migration to deeper habitats is expected to provide refuge. Range extensions of several degrees of latitude also are anticipated, but only where species-specific habitat requirements can be met (e.g., temperature, suitable substrate, low turbulence, light, salinity, pH). The current understanding of habitat requirements that determine species distributions are reviewed to provide fuller understanding of how individual species will respond to climate change from the present to 2055 while addressing the paucity of information on environmental factors controlling small-scale distribution in localized habitats. Based on the available information, we hypothesized how complex environmental interactions can influence abundance and potential range extensions of BHAB species in different biogeographic regions and identify sentinel sites appropriate for long-term monitoring programs to detect range extensions and reduce human health risks.
Collapse
Affiliation(s)
| | - R Wayne Litaker
- National Oceanic and Atmospheric Administration, National Ocean Service, National Centers for Coastal Ocean Science, Beaufort Laboratory, 101 Pivers Island Road, Beaufort, NC, 28516, USA
| | - Elisa Berdalet
- Institute of Marine Sciences (ICM-CSIC), Passeig Marítim de la Barceloneta, 37-49, 08003, Barcelona, Catalonia, Spain
| |
Collapse
|
19
|
Ben Gharbia H, Laabir M, Ben Mhamed A, Gueroun SKM, Daly Yahia MN, Nouri H, M'Rabet C, Shili A, Kéfi-Daly Yahia O. Occurrence of epibenthic dinoflagellates in relation to biotic substrates and to environmental factors in Southern Mediterranean (Bizerte Bay and Lagoon, Tunisia): An emphasis on the harmful Ostreopsis spp., Prorocentrum lima and Coolia monotis. HARMFUL ALGAE 2019; 90:101704. [PMID: 31806162 DOI: 10.1016/j.hal.2019.101704] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 10/28/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Harmful events associated with epibenthic dinoflagellates, have been reported more frequently over the last decades. Occurrence of potentially toxic benthic dinoflagellates, on the leaves of two magnoliophytes (Cymodocea nodosa and Zostera noltei) and thalli of the macroalgae (Ulva rigida), was monitored over one year (From May 2015 to April 2016) in the Bizerte Bay and Lagoon (North of Tunisia, Southern Mediterranean Sea). The investigated lagoon is known to be highly anthropized. This is the first report on the seasonal distribution of epibenthic dinoflagellates hosted by natural substrates, from two contrasted, adjacent coastal Mediterranean ecosystems. The environmental factors promoting the development of the harmful epibenthic dinoflagellates Ostreopsis spp., Prorocentrum lima and Coolia monotis were investigated. The highest cell densities were reached by Ostreopsis spp. (1.9 × 103 cells g-1 FW, in October 2015), P. lima (1.6 × 103 cells g-1 FW, in June 2015) and C. monotis (1.1 × 103 cells g-1 FW, in May 2015). C. nodosa and Z. noltei were the most favorable host macrophytes for C. monotis (in station L2) and Ostreopsis spp. (in station L3), respectively. Positive correlations were recorded between Ostreopsis spp. and temperature. Densities of the epibenthic dinoflagellates varied according to the collection site, and a great disparity was observed between the Bay and the Lagoon. Maximum concentrations were recorded on C. nodosa leaves from the Bizerte Bay, while low epiphytic cell abundances were associated with macrophytes sampled from the Bizerte Lagoon. The observed differences in dinoflagellate abundances between the two ecosystems (Bay-Lagoon) seemed not related to the nutrients, but rather to the poor environmental conditions in the lagoon.
Collapse
Affiliation(s)
- Hela Ben Gharbia
- Research Group on Oceanography and Plankton Ecology, Tunisian National Institute of Agronomy (INAT), 43 Avenue Charles Nicolle, IRESA- Carthage University, LR18ES41 (Tunis El Manar University), Tunis, 1082, Tunisia.
| | - Mohamed Laabir
- Center for Marine Biodiversity, Exploitation and Conservation (MARBEC), Institut de Recherche pour le Développement (IRD), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Centre National de la Recherche Scientifique (CNRS), Montpellier University, Place Eugène Bataillon, CC093, Montpellier, Cedex 5, F-34095, France
| | - Abdelouahed Ben Mhamed
- National Institute for Fisheries Research, Central laboratories, Bd Sidi Abderrahmane Ain Diab 2, Casablanca, Morocco
| | - Sonia Khadija Maïté Gueroun
- Faculty of Sciences of Bizerte, Laboratory of Aquatic Systems Biodiversity and Functioning, 7021 Zarzouna, Carthage University, Bizerte, Tunisia
| | - Mohamed Néjib Daly Yahia
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, PO Box 2713, Doha, Qatar
| | - Habiba Nouri
- Institut de Recherche pour le Développement (IRD), 2 Rue Des Sports-El Menzah 1, BP 434, Tunis, 1004, Tunisia
| | - Charaf M'Rabet
- Research Group on Oceanography and Plankton Ecology, Tunisian National Institute of Agronomy (INAT), 43 Avenue Charles Nicolle, IRESA- Carthage University, LR18ES41 (Tunis El Manar University), Tunis, 1082, Tunisia
| | - Abdessalem Shili
- Tunisian National Institute of Agronomy (INAT), 43 Avenue Charles Nicolle, IRESA-Carthage University, Tunis, 1082, Tunisia
| | - Ons Kéfi-Daly Yahia
- Research Group on Oceanography and Plankton Ecology, Tunisian National Institute of Agronomy (INAT), 43 Avenue Charles Nicolle, IRESA- Carthage University, LR18ES41 (Tunis El Manar University), Tunis, 1082, Tunisia
| |
Collapse
|
20
|
Toldrà A, Alcaraz C, Diogène J, O'Sullivan CK, Campàs M. Detection of Ostreopsis cf. ovata in environmental samples using an electrochemical DNA-based biosensor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 689:655-661. [PMID: 31279212 DOI: 10.1016/j.scitotenv.2019.06.448] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/26/2019] [Accepted: 06/26/2019] [Indexed: 05/15/2023]
Abstract
Ostreopsis cf. ovata is a benthic microalga distributed in tropical and temperate regions worldwide which produces palytoxins (PlTXs). Herein, an electrochemical biosensor for the detection of this toxic microalga is described. The detection strategy involves isothermal recombinase polymerase amplification (RPA) of the target using tailed primers and a sandwich hybridisation assay on maleimide-coated magnetic beads immobilised on electrode arrays. The biosensor attained a limit of detection of 9 pg/μL of O. cf. ovata DNA (which corresponds to ~640 cells/L), with no interferences from two non-target Ostreopsis species (O. cf. siamensis and O. fattorussoi). The biosensor was applied to the analysis of planktonic and benthic environmental samples. Electrochemical O. cf. ovata DNA quantifications demonstrated an excellent correlation with other molecular methods (qPCR and colorimetric assays) and allowed the construction of a predictive regression model to estimate O. cf. ovata cell abundances. This new technology offer great potential to improve research, monitoring and management of O. cf. ovata and harmful algal blooms.
Collapse
Affiliation(s)
- Anna Toldrà
- IRTA, Ctra. Poble Nou km 5.5, 43540 Sant Carles de la Ràpita, Tarragona, Spain
| | - Carles Alcaraz
- IRTA, Ctra. Poble Nou km 5.5, 43540 Sant Carles de la Ràpita, Tarragona, Spain
| | - Jorge Diogène
- IRTA, Ctra. Poble Nou km 5.5, 43540 Sant Carles de la Ràpita, Tarragona, Spain
| | - Ciara K O'Sullivan
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, 08010 Barcelona, Spain.
| | - Mònica Campàs
- IRTA, Ctra. Poble Nou km 5.5, 43540 Sant Carles de la Ràpita, Tarragona, Spain.
| |
Collapse
|
21
|
Santos M, Oliveira PB, Moita MT, David H, Caeiro MF, Zingone A, Amorim A, Silva A. Ocurrence of Ostreopsis in two temperate coastal bays (SW iberia): Insights from the plankton. HARMFUL ALGAE 2019; 86:20-36. [PMID: 31358274 DOI: 10.1016/j.hal.2019.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 03/08/2019] [Accepted: 03/08/2019] [Indexed: 06/10/2023]
Abstract
The benthic genus Ostreopsis contains toxic-bloom forming species and is an important cause of concern in warm-temperate and tropical waters. On the coast of Portugal, NE Atlantic, the occurrence of Ostreopsis cf. siamensis and Ostreopsis cf. ovata has been reported since 2008 and 2011, respectively. This work aims to understand the favorable conditions for high concentrations of Ostreopsis cells in the plankton at two sites, Lagos and Lisbon Bays, located in the South and West coast of Portugal, respectively. This study is based on weekly Ostreopsis abundance data in the plankton, from 2011 to 2017, daily satellite and in situ sea surface temperature (SST), and meteorological and sea state parameters, namely wind stress and significant wave height. The molecular identification of local Ostreopsis spp. is also presented. The maximum cell densities occur between late-summer and autumn. The distribution range of Ostreopsis cf. ovata is restricted to the South coast, while Ostreopsis cf. siamensis has a wider distribution range, being also present on the West coast. In the study period, there was only one occurrence of Ostreopsis spp., in Lagos Bay, with concentrations within the alert phase of monitoring. In Lagos Bay, high Ostreopsis spp. concentrations were related with positive SST anomalies. These high concentrations were often recorded after a period of almost 2-weeks to more than 4-weeks of low sea state (<0.6 m), followed by short time events of onshore wind and moderate waves (0.6-1 m). The former conditions are interpreted as favoring bloom development on the substrate and the latter as causing the re-suspension of Ostreopsis cells in the water column. In Lisbon Bay, O. cf. siamensis occurred in the plankton in few occasions and no clear relation could be established with the studied environmental variables. It is here hypothesized that the recent records of O. cf. siamensis in Lisbon Bay may correspond to an early colonization stage of an invasion process. Knowledge gained on Ostreopsis dynamics along the Portuguese coast can be used for both the improvement of benthic harmful algal blooms (BHABs) monitoring in the region and as a basis to design forecasting models.
Collapse
Affiliation(s)
- Mariana Santos
- IPMA, I.P. - Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-006 Lisbon, Portugal; MARE - Centro de Ciências do Mar e do Ambiente, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal.
| | - Paulo B Oliveira
- IPMA, I.P. - Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-006 Lisbon, Portugal.
| | - Maria Teresa Moita
- IPMA, I.P. - Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-006 Lisbon, Portugal; CCMAR - Centro de Ciências do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal.
| | - Helena David
- MARE - Centro de Ciências do Mar e do Ambiente, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal; Departamento de Biologia Vegetal, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal.
| | - Maria Filomena Caeiro
- Departamento de Biologia Vegetal, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal; Centro de Estudos do Ambiente e do Mar (CESAM), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal.
| | - Adriana Zingone
- SZN - Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy.
| | - Ana Amorim
- MARE - Centro de Ciências do Mar e do Ambiente, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal; Departamento de Biologia Vegetal, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal.
| | - Alexandra Silva
- IPMA, I.P. - Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-006 Lisbon, Portugal; CCMAR - Centro de Ciências do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal.
| |
Collapse
|
22
|
Toldrà A, Alcaraz C, Andree KB, Fernández-Tejedor M, Diogène J, Katakis I, O'Sullivan CK, Campàs M. Colorimetric DNA-based assay for the specific detection and quantification of Ostreopsis cf. ovata and Ostreopsis cf. siamensis in the marine environment. HARMFUL ALGAE 2019; 84:27-35. [PMID: 31128810 DOI: 10.1016/j.hal.2019.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 01/24/2019] [Accepted: 02/01/2019] [Indexed: 06/09/2023]
Abstract
Ostreopsis is a toxic benthic dinoflagellate largely distributed worldwide in tropical and temperate areas. In the Mediterranean Sea, periodic summer blooms have been reported and have become a serious concern due to their direct impact on human health and the environment. Current microalgae identification is performed via light microscopy, which is time-consuming and is not able to differentiate among Ostreopsis species. Therefore, there is mature need for rapid, specific and easy-to-use detection tools. In this work, a colorimetric assay exploiting a combination of recombinase polymerase amplification (RPA) and a sandwich hybridisation assay was developed for O. cf. ovata and O. cf. siamensis detection and quantification. The specificity of the system was demonstrated by cross-reactivity experiments and calibration curves were successfully constructed using genomic DNA, achieving limits of detection of 10 and 14 pg/μL for O. cf. ovata and O. cf. siamensis, respectively. The assay was applied to the analysis of planktonic and benthic environmental samples from different sites of the Catalan coast. Species-specific DNA quantifications were in agreement with qPCR analysis, demonstrating the reliability of the colorimetric approach. Significant correlations were also obtained between DNA quantifications and light microscopy counts. The approach may be a valuable tool to provide timely warnings, facilitate monitoring activities or study population dynamics, and paves the way towards the development of in situ tools for the monitoring of harmful algal blooms.
Collapse
Affiliation(s)
- Anna Toldrà
- IRTA, Ctra. Poble Nou km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain
| | - Carles Alcaraz
- IRTA, Ctra. Poble Nou km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain
| | - Karl B Andree
- IRTA, Ctra. Poble Nou km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain
| | | | - Jorge Diogène
- IRTA, Ctra. Poble Nou km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain
| | - Ioanis Katakis
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Spain
| | - Ciara K O'Sullivan
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Spain; ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain.
| | - Mònica Campàs
- IRTA, Ctra. Poble Nou km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain.
| |
Collapse
|
23
|
Future challenges in seafood chemical hazards: Research and infrastructure needs. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2018.09.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
24
|
Guidi F, Pezzolesi L, Vanucci S. Microbial dynamics during harmful dinoflagellate Ostreopsis cf. ovata growth: Bacterial succession and viral abundance pattern. Microbiologyopen 2018; 7:e00584. [PMID: 29484854 PMCID: PMC6079179 DOI: 10.1002/mbo3.584] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 12/13/2017] [Accepted: 12/19/2017] [Indexed: 12/13/2022] Open
Abstract
Algal-bacterial interactions play a major role in shaping diversity of algal associated bacterial communities. Temporal variation in bacterial phylogenetic composition reflects changes of these complex interactions which occur during the algal growth cycle as well as throughout the lifetime of algal blooms. Viruses are also known to cause shifts in bacterial community diversity which could affect algal bloom phases. This study investigated on changes of bacterial and viral abundances, bacterial physiological status, and on bacterial successional pattern associated with the harmful benthic dinoflagellate Ostreopsis cf. ovata in batch cultures over the algal growth cycle. Bacterial community phylogenetic structure was assessed by 16S rRNA gene ION torrent sequencing. A comparison between bacterial community retrieved in cultures and that one co-occurring in situ during the development of the O. cf. ovata bloom from where the algal strain was isolated was also reported. Bacterial community growth was characterized by a biphasic pattern with the highest contributions (~60%) of highly active bacteria found at the two bacterial exponential growth steps. An alphaproteobacterial consortium composed by the Rhodobacteraceae Dinoroseobacter (22.2%-35.4%) and Roseovarius (5.7%-18.3%), together with Oceanicaulis (14.2-40.3%), was strongly associated with O. cf. ovata over the algal growth. The Rhodobacteraceae members encompassed phylotypes with an assessed mutualistic-pathogenic bimodal behavior. Fabibacter (0.7%-25.2%), Labrenzia (5.6%-24.3%), and Dietzia (0.04%-1.7%) were relevant at the stationary phase. Overall, the successional pattern and the metabolic and functional traits of the bacterial community retrieved in culture mirror those ones underpinning O. cf. ovata bloom dynamics in field. Viral abundances increased synoptically with bacterial abundances during the first bacterial exponential growth step while being stationary during the second step. Microbial trends also suggest that viruses induced some shifts in bacterial community composition.
Collapse
Affiliation(s)
- Flavio Guidi
- Department of Biological, Geological and Environmental Sciences (BiGeA)University of BolognaRavennaItaly
| | - Laura Pezzolesi
- Department of Biological, Geological and Environmental Sciences (BiGeA)University of BolognaRavennaItaly
| | - Silvana Vanucci
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm)University of MessinaMessinaItaly
| |
Collapse
|
25
|
Zhou J, Richlen ML, Sehein TR, Kulis DM, Anderson DM, Cai Z. Microbial Community Structure and Associations During a Marine Dinoflagellate Bloom. Front Microbiol 2018; 9:1201. [PMID: 29928265 PMCID: PMC5998739 DOI: 10.3389/fmicb.2018.01201] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 05/16/2018] [Indexed: 11/13/2022] Open
Abstract
Interactions between microorganisms and algae during bloom events significantly impacts their physiology, alters ambient chemistry, and shapes ecosystem diversity. The potential role these interactions have in bloom development and decline are also of particular interest given the ecosystem impacts of algal blooms. We hypothesized that microbial community structure and succession is linked to specific bloom stages, and reflects complex interactions among taxa comprising the phycosphere environment. This investigation used pyrosequencing and correlation approaches to assess patterns and associations among bacteria, archaea, and microeukaryotes during a spring bloom of the dinoflagellate Alexandrium catenella. Within the bacterial community, Gammaproteobacteria and Bacteroidetes were predominant during the initial bloom stage, while Alphaproteobacteria, Cyanobacteria, and Actinobacteria were the most abundant taxa present during bloom onset and termination. In the archaea biosphere, methanogenic members were present during the early bloom period while the majority of species identified in the late bloom stage were ammonia-oxidizing archaea and Halobacteriales. Dinoflagellates were the major eukaryotic group present during most stages of the bloom, whereas a mixed assemblage comprising diatoms, green-algae, rotifera, and other microzooplankton were present during bloom termination. Temperature and salinity were key environmental factors associated with changes in bacterial and archaeal community structure, respectively, whereas inorganic nitrogen and inorganic phosphate were associated with eukaryotic variation. The relative contribution of environmental parameters measured during the bloom to variability among samples was 35.3%. Interaction analysis showed that Maxillopoda, Spirotrichea, Dinoflagellata, and Halobacteria were keystone taxa within the positive-correlation network, while Halobacteria, Dictyochophyceae, Mamiellophyceae, and Gammaproteobacteria were the main contributors to the negative-correlation network. The positive and negative relationships were the primary drivers of mutualist and competitive interactions that impacted algal bloom fate, respectively. Functional predictions showed that blooms enhance microbial carbohydrate and energy metabolism, and alter the sulfur cycle. Our results suggest that microbial community structure is strongly linked to bloom progression, although specific drivers of community interactions and responses are not well understood. The importance of considering biotic interactions (e.g., competition, symbiosis, and predation) when investigating the link between microbial ecological behavior and an algal bloom's trajectory is also highlighted.
Collapse
Affiliation(s)
- Jin Zhou
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, China
| | - Mindy L. Richlen
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
| | - Taylor R. Sehein
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
| | - David M. Kulis
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
| | - Donald M. Anderson
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
| | - Zhonghua Cai
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, China
| |
Collapse
|
26
|
Fricke A, Pey A, Gianni F, Lemée R, Mangialajo L. Multiple stressors and benthic harmful algal blooms (BHABs): Potential effects of temperature rise and nutrient enrichment. MARINE POLLUTION BULLETIN 2018; 131:552-564. [PMID: 29886982 DOI: 10.1016/j.marpolbul.2018.04.012] [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: 12/07/2017] [Revised: 03/07/2018] [Accepted: 04/07/2018] [Indexed: 06/08/2023]
Abstract
Blooms of Ostreopsis cf. ovata, causing health incidence and mass human intoxications in the Mediterranean, gained special attention over the past decades. To study the potential effects of temperature and nutrient enrichment on this benthic dinoflagellate and other associated microalgae in situ, a multifactorial experiment was set up along a temperature gradient of a heat pump system in Monaco. Microalgae were quantified in experimental units, in the natural biofilm and in the water column. No significant interaction was observed between temperature and nutrients. A species- and bloom phase-dependent effect of the increased temperature was recorded, while the nutrient enrichment had a significant effect only at the end of the experiment (when cell abundances were low). Temperature effects were also visible in the biofilm and the surrounding water. The observed assemblages were mainly driven by changes in abundances of Ostreopsis cf. ovata and Actinocyclus sp., affected in different ways.
Collapse
Affiliation(s)
- A Fricke
- Université Côte d'Azur, CNRS, ECOMERS, Parc Valrose 28, Nice 06108, France; Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, F-06230 Villefranche sur mer, France; Instituto Argentino de Oceanografía (IADO), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Florida 4750, Bahía Blanca, B8000FWB, n/a, Argentina.
| | - A Pey
- Université Côte d'Azur, CNRS, ECOMERS, Parc Valrose 28, Nice 06108, France
| | - F Gianni
- Université Côte d'Azur, CNRS, ECOMERS, Parc Valrose 28, Nice 06108, France; Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, F-06230 Villefranche sur mer, France
| | - R Lemée
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, F-06230 Villefranche sur mer, France
| | - L Mangialajo
- Université Côte d'Azur, CNRS, ECOMERS, Parc Valrose 28, Nice 06108, France; Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, F-06230 Villefranche sur mer, France
| |
Collapse
|
27
|
Mendes MCDQ, Nunes JMC, Menezes M, Fraga S, Rodríguez F, Vázquez JA, Blanco J, Franco JM, Riobó P. Toxin production, growth kinetics and molecular characterization of Ostreopsis cf. ovata isolated from Todos os Santos Bay, tropical southwestern Atlantic. Toxicon 2017; 138:18-30. [DOI: 10.1016/j.toxicon.2017.08.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 08/03/2017] [Accepted: 08/06/2017] [Indexed: 01/20/2023]
|
28
|
Accoroni S, Tartaglione L, Dello Iacovo E, Pichierri S, Marini M, Campanelli A, Dell'Aversano C, Totti C. Influence of environmental factors on the toxin production of Ostreopsis cf. ovata during bloom events. MARINE POLLUTION BULLETIN 2017; 123:261-268. [PMID: 28863976 DOI: 10.1016/j.marpolbul.2017.08.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 08/16/2017] [Accepted: 08/19/2017] [Indexed: 06/07/2023]
Abstract
Intense blooms of the toxic dinoflagellate Ostreopsis have been a recurrent phenomenon along several Mediterranean coasts. Blooms have been associated with noxious effects on human health and mortality of marine organisms, due to the production of palytoxin-like compounds. We analyzed the toxin concentrations throughout an O. cf. ovata bloom to highlight their relationships with environmental parameters in the Conero Riviera, northern Adriatic Sea. High temperature and balanced nutrient conditions were the optimal environmental conditions to start and sustain blooms as well as to maximize toxin production. Ostreopsis showed a gradual decrease of toxin content throughout the bloom ascribed to the occurring of the same non-optimal conditions that led to the bloom decline. Moreover, our results suggest that toxin fraction released during bloom could be higher than that released in batch culture. Results from this study pointed out that the first bloom phase is potentially the most dangerous to human health.
Collapse
Affiliation(s)
- Stefano Accoroni
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
| | - Luciana Tartaglione
- Dipartimento di Farmacia, Scuola di Medicina, Università degli Studi di Napoli "Federico II", Via D. Montesano 49, 80131 Napoli, Italy
| | - Emma Dello Iacovo
- Dipartimento di Farmacia, Scuola di Medicina, Università degli Studi di Napoli "Federico II", Via D. Montesano 49, 80131 Napoli, Italy
| | - Salvatore Pichierri
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Mauro Marini
- Istituto di Scienze Marine (Consiglio Nazionale delle Ricerche), Largo Fiera della Pesca, 60125 Ancona, Italy
| | - Alessandra Campanelli
- Istituto di Scienze Marine (Consiglio Nazionale delle Ricerche), Largo Fiera della Pesca, 60125 Ancona, Italy
| | - Carmela Dell'Aversano
- Dipartimento di Farmacia, Scuola di Medicina, Università degli Studi di Napoli "Federico II", Via D. Montesano 49, 80131 Napoli, Italy
| | - Cecilia Totti
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| |
Collapse
|
29
|
Sun JY, Song Y, Ma ZP, Zhang HJ, Yang ZD, Cai ZH, Zhou J. Fungal community dynamics during a marine dinoflagellate (Noctiluca scintillans) bloom. MARINE ENVIRONMENTAL RESEARCH 2017; 131:183-194. [PMID: 29017729 DOI: 10.1016/j.marenvres.2017.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/27/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Contamination and eutrophication have caused serious ecological events (such as algal bloom) in coastal area. During this ecological process, microbial community structure is critical for algal bloom succession. The diversity and composition of bacteria and archaea communities in algal blooms have been widely investigated; however, those of fungi are poorly understood. To fill this gap, we used pyrosequencing and correlation approaches to assess fungal patterns and associations during a dinoflagellate (Noctiluca scintillans) bloom. Phylum level fungal types were predominated by Ascomycota, Chytridiomycota, Mucoromycotina, and Basidiomycota. At the genus level drastic changes were observed with Hysteropatella, Malassezia and Saitoella dominating during the initial bloom stage, while Malassezia was most abundant (>50%) during onset and peak-bloom stages. Saitoella and Lipomyces gradually became more abundant and, in the decline stage, contributed almost 70% of sequences. In the terminal stage of the bloom, Rozella increased rapidly to a maximum of 50-60%. Fungal population structure was significantly influenced by temperature and substrate (N and P) availability (P < 0.05). Inter-specific network analyses demonstrated that Rozella and Saitoella fungi strongly impacted the ecological trajectory of N. scintillans. The functional prediction show that symbiotrophic fungi was dominated in the onset stage; saprotroph type was the primary member present during the exponential growth period; whereas pathogentroph type fungi enriched in decline phase. Overall, fungal communities and functions correlated significantly with N. scintillans processes, suggesting that they may regulate dinoflagellate bloom fates. Our results will facilitate deeper understanding of the ecological importance of marine fungi and their roles in algal bloom formation and collapse.
Collapse
Affiliation(s)
- Jing-Yun Sun
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China; School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, PR China
| | - Yu Song
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China
| | - Zhi-Ping Ma
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China
| | - Huai-Jing Zhang
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China
| | - Zhong-Duo Yang
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, PR China; The Provincial Education Key Laboratory of Screening, Evaluation and Advanced Processing of Traditional Chinese Medicine and Tibetan Medicine, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, Gansu Province, PR China
| | - Zhong-Hua Cai
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China.
| | - Jin Zhou
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China.
| |
Collapse
|
30
|
Giussani V, Asnaghi V, Pedroncini A, Chiantore M. Management of harmful benthic dinoflagellates requires targeted sampling methods and alarm thresholds. HARMFUL ALGAE 2017; 68:97-104. [PMID: 28962993 DOI: 10.1016/j.hal.2017.07.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 07/26/2017] [Accepted: 07/28/2017] [Indexed: 06/07/2023]
Abstract
Concern regarding Benthic Harmful Algal Blooms (BHABs) is increasing since some harmful benthic species have been identified in new areas. In the Mediterranean basin, the most common harmful benthic microalgae are Ostreopsis cf. ovata and Prorocentrum lima, which produce palytoxin-like compounds and okadaic acid respectively, and the need to implement monitoring activities has increased. However, a general agreement on appropriate strategies (e.g. sampling season, definition of alarm thresholds, etc.) is still lagging behind, especially for P. lima, whose proliferation dynamics are still poorly known.
Collapse
Affiliation(s)
- Valentina Giussani
- DISTAV-University of Genoa, Corso Europa 26, 16132, Genoa, Italy; ARPAL-Dip. Biotossicologia ambientale, Via Fontevivo 21L, 19125 La Spezia, Italy.
| | - Valentina Asnaghi
- DISTAV-University of Genoa, Corso Europa 26, 16132, Genoa, Italy; CoNISMa-P.le Flaminio, 9, 00196, Rome, Italy
| | | | - Mariachiara Chiantore
- DISTAV-University of Genoa, Corso Europa 26, 16132, Genoa, Italy; CoNISMa-P.le Flaminio, 9, 00196, Rome, Italy
| |
Collapse
|
31
|
Culturing Toxic Benthic Blooms: The Fate of Natural Biofilms in a Microcosm System. Microorganisms 2017; 5:microorganisms5030046. [PMID: 28783081 PMCID: PMC5620637 DOI: 10.3390/microorganisms5030046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/31/2017] [Accepted: 08/02/2017] [Indexed: 11/24/2022] Open
Abstract
A microcosm designed for culturing aquatic phototrophic biofilms on artificial substrata was used to perform experiments with microphytobenthos sampled during summer toxic outbreaks of Ostreopsis cf. ovata along the Middle Tyrrhenian coast. This dynamic approach aimed at exploring the unique and complex nature of O. cf. ovata bloom development in the benthic system. Epibenthic assemblages were used as inocula for co-cultures of bloom organisms on polycarbonate slides at controlled environmental conditions. Biofilm surface adhesion, growth, and spatial structure were evaluated along with shifts in composition and matrix production in a low disturbance regime, simulating source habitat. Initial adhesion and substratum colonisation appeared as stochastic processes, then community structure and physiognomy markedly changed with time. Dominance of filamentous cyanobacteria and diatoms, and dense clusters of Amphidinium cf. carterae at the mature biofilm phases, were recorded by light and confocal microscopy, whilst O. cf. ovata growth was visibly limited in the late culture phases. Life-form strategies, competitiveness for resources, and possibly allelopathic interactions shaped biofilm structure during culture growth. HPLC (High Performance Liquid Chromatography) analysis of exopolysaccharidic matrix revealed variations in sugar total amounts and composition. No toxic compounds were detected in the final communities tested by LC-MS (Liquid Chromatography- Mass Spectrometry) and MALDI-TOF MS (Matrix Assisted Laser Desorption Ionization Time OF Flight Mass Spectroscopy) techniques.
Collapse
|
32
|
Abdennadher M, Zouari AB, Sahnoun WF, Alverca E, Penna A, Hamza A. Ostreopsis cf. ovata in the Gulf of Gabès (south-eastern Mediterranean Sea): morphological, molecular and ecological characterization. HARMFUL ALGAE 2017; 63:56-67. [PMID: 28366400 DOI: 10.1016/j.hal.2017.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 01/24/2017] [Indexed: 06/07/2023]
Abstract
In the last few decades, the frequency of the toxic benthic dinoflagellate Ostreopsis cf. ovata proliferation has increased in the Mediterranean Sea. These blooms are associated with harmful effects on human health and the environment. The present work provides the first long term study on the spatio-temporal distribution of O. cf. ovata in relation to physical parameters in the Gulf of Gabès coastal waters (south-eastern Mediterranean Sea), as well as its morphological, molecular and physiological features. The strains of O. cf. ovata were identified morphologically by light and epifluorescence microscopy. The morphology and the size range of cultured strains were similar to those described regarding O. cf. ovata isolated from the Mediterranean Sea. The ultrastructural analysis of O. cf. ovata cells using the transmission electron microscopy showed the presence of numerous vesicles (VE) containing spirally coiled fibers (SCFs) connected to the mucus canal (CH). The phylogenetic tree based on the internal transcribed spacer region containing the 5.8S rDNA (ITS-5.8S rDNA) revealed that O. cf. ovata strains were placed into the Mediterranean/Atlantic clade. In addition, O. cf. ovata toxicity was evaluated by the mouse bioassay and a dose level≥4×104 cells was found to be lethal to mice. The examination of the O. cf. ovata occurrence in the Gulf of Gabès at a large temporal scale (1997-2012) revealed a clear seasonal pattern with dominance from midsummer (July) to late autumn (November). Furthermore, a positive correlation was found between the abundance of O. cf. ovata and salinity, whereas no correlation was found as regards temperature. The occurrence of O. cf. ovata was only detected at salinity above 35 and the highest concentrations were observed at 45. Laboratory experiments confirmed such a result and showed that isolated O. cf. ovata strains had optimal growth at salinity ranging between 35 and 45, with its peak at 40.
Collapse
Affiliation(s)
- Moufida Abdennadher
- National Institute of Marine Sciences and Technologies, BP 1035, 3018 Sfax, Tunisie.
| | - Amel Bellaaj Zouari
- National Institute of Marine Sciences and Technologies, Fishing Port, 2060 La Goulette, Tunisie.
| | - Wafa Feki Sahnoun
- National Institute of Marine Sciences and Technologies, BP 1035, 3018 Sfax, Tunisie.
| | - Elsa Alverca
- Environment Reference Laboratory, Portuguese Environment Agency, Rua da Murgueira, 9/9A | Zambujal, 2611-865 Amadora, Portugal.
| | - Antonella Penna
- Department of Biomolecular Sciences, University of Urbino, 61121 Pesaro (PU), Italy.
| | - Asma Hamza
- National Institute of Marine Sciences and Technologies, BP 1035, 3018 Sfax, Tunisie.
| |
Collapse
|
33
|
García-Portela M, Riobó P, Franco JM, Bañuelos RM, Rodríguez F. Genetic and toxinological characterization of North Atlantic strains of the dinoflagellate Ostreopsis and allelopathic interactions with toxic and non-toxic species from the genera Prorocentrum, Coolia and Gambierdiscus. HARMFUL ALGAE 2016; 60:57-69. [PMID: 28073563 DOI: 10.1016/j.hal.2016.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 10/25/2016] [Accepted: 10/25/2016] [Indexed: 06/06/2023]
Abstract
The genus Ostreopsis includes several toxic species that can develop blooms in benthic ecosystems, with potential harmful consequences for human health and marine invertebrates. Despite of this, little is known about the allelopathic interactions between these organisms and other co-occurring microalgae that exploit similar spatial and nutrient resources in benthic ecosystems. The aim of this study was to follow these interactions in cultures of two Ostreopsis ribotypes with different toxin profiles (O. cf. ovata contained ovatoxins-a, b, c and e, while only ovatoxin-d was found in O .sp. "Lanzarote-type"), mixed with species of three benthic dinoflagellate genera (Coolia, Prorocentrum and Gambierdiscus), isolated from the same area (North East Atlantic, Canary Islands). In a first experiment, the potential allelopathic effects on growth rates were followed, in mixed cultures of Coolia monotis (a non toxic species) exposed to the clarified medium and to cells of O. sp."Lanzarote-type" and O. cf. ovata. Growth delayed in C. monotis was observed specially in clarified medium, while the O. sp. "Lanzarote-type" strain attained much lower densities in mixed cultures. In a second experiment, we examined the potential effects of clarified media from O. sp."Lanzarote-type" and O. cf. ovata on the adherence capacity in two toxic species (Prorocentrum hoffmannianum and Gambierdiscus excentricus). Contrasting effects were found: a significant increase of adherence capacity in P. hoffmannianum vs attachment decline in G. excentricus, that experienced also severe deleterious effects (cell lysis). Our results suggest the existence of weak to moderate allelopathic interactions between the studied organisms, although the outcome is dependent on the species involved.
Collapse
Affiliation(s)
- María García-Portela
- Instituto Español de Oceanografia (IEO), Centro Oceanográfico de Vigo, Subida a Radio Faro 50-52, Cabo Estay, Canido, 36390 Vigo, Spain.
| | - Pilar Riobó
- Instituto de Investigaciones Marinas, CSIC (UA Microalgas Nocivas CSIC-IEO), Eduardo Cabello, 6, 36208 Vigo, Spain.
| | - José Mariano Franco
- Instituto de Investigaciones Marinas, CSIC (UA Microalgas Nocivas CSIC-IEO), Eduardo Cabello, 6, 36208 Vigo, Spain.
| | - Rosa Mª Bañuelos
- Departamento de Oceanografía, Instituto de Investigaciones Marinas (CSIC), Eduardo Cabello, 6, 36208 Vigo, Spain.
| | - Francisco Rodríguez
- Instituto Español de Oceanografia (IEO), Centro Oceanográfico de Vigo, Subida a Radio Faro 50-52, Cabo Estay, Canido, 36390 Vigo, Spain.
| |
Collapse
|
34
|
Accoroni S, Romagnoli T, Penna A, Capellacci S, Ciminiello P, Dell'Aversano C, Tartaglione L, Abboud-Abi Saab M, Giussani V, Asnaghi V, Chiantore M, Totti C. Ostreopsis fattorussoi sp. nov. (Dinophyceae), a new benthic toxic Ostreopsis species from the eastern Mediterranean Sea. JOURNAL OF PHYCOLOGY 2016; 52:1064-1084. [PMID: 27633521 DOI: 10.1111/jpy.12464] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 08/02/2016] [Indexed: 06/06/2023]
Abstract
The new benthic toxic dinoflagellate, Ostreopsis fattorussoi sp. nov., is described from the Eastern Mediterranean Sea, Lebanon and Cyprus coasts, and is supported by morphological and molecular data. The plate formula, Po, 3', 7″, 6c, 7s, 5‴, 2'''', is typical for the Ostreopsis genus. It differs from all other Ostreopsis species in that (i) the curved suture between plates 1' and 3' makes them approximately hexagonal, (ii) the 1' plate lies in the left half of the epitheca and is obliquely orientated leading to a characteristic shape of plate 6″. The round thecal pores are bigger than the other two Mediterranean species (O. cf. ovata and O. cf. siamensis). O. fattorussoi is among the smallest species of the genus (DV: 60.07 ± 5.63 μm, AP: 25.66 ± 2.97 μm, W: 39.81 ± 5.05 μm) along with O. ovata. Phylogenetic analyses based on the LSU and internal transcribed spacer rDNA shows that O. fattorussoi belongs to the Atlantic/Mediterranean Ostreopsis spp. clade separated from the other Ostreopsis species. Ostreopsis fattorussoi produces OVTX-a and structural isomers OVTX-d and -e, O. cf. ovata is the only other species of this genus known to produce these toxins. The Lebanese O. fattorussoi did not produce the new palytoxin-like compounds (ovatoxin-i, ovatoxin-j1 , ovatoxin-j2 , and ovatoxin-k) that were previously found in O. fattorussoi from Cyprus. The toxin content was in the range of 0.28-0.94 pg · cell-1 . On the Lebanon coast, O. fattorussoi was recorded throughout the year 2015 (temperature range 18°C-31.5°C), with peaks in June and August.
Collapse
Affiliation(s)
- Stefano Accoroni
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, via Brecce Bianche, 60131, Ancona, Italy
- Consorzio Interuniversitario Scienze del Mare (CoNISMa), Via Flaminio 9, 00196, Roma, Italy
| | - Tiziana Romagnoli
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, via Brecce Bianche, 60131, Ancona, Italy
| | - Antonella Penna
- Consorzio Interuniversitario Scienze del Mare (CoNISMa), Via Flaminio 9, 00196, Roma, Italy
- Dipartimento di Scienze Biomolecolari, Università di Urbino, Viale Trieste 296, 61100, Pesaro, Italy
| | - Samuela Capellacci
- Consorzio Interuniversitario Scienze del Mare (CoNISMa), Via Flaminio 9, 00196, Roma, Italy
- Dipartimento di Scienze Biomolecolari, Università di Urbino, Viale Trieste 296, 61100, Pesaro, Italy
| | - Patrizia Ciminiello
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II", Via D. Montesano 49, 80131, Napoli, Italy
| | - Carmela Dell'Aversano
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II", Via D. Montesano 49, 80131, Napoli, Italy
| | - Luciana Tartaglione
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II", Via D. Montesano 49, 80131, Napoli, Italy
| | - Marie Abboud-Abi Saab
- National Council for Scientific Research/National Center for Marine Sciences, P.O. Box 534, Batroun, Lebanon
| | - Valentina Giussani
- Dipartimento di Scienze della Terra, dell'Ambiente e della Vita, Università degli Studi di Genova, Corso Europa 26, 16132, Genoa, Italy
| | - Valentina Asnaghi
- Consorzio Interuniversitario Scienze del Mare (CoNISMa), Via Flaminio 9, 00196, Roma, Italy
- Dipartimento di Scienze della Terra, dell'Ambiente e della Vita, Università degli Studi di Genova, Corso Europa 26, 16132, Genoa, Italy
| | - Mariachiara Chiantore
- Consorzio Interuniversitario Scienze del Mare (CoNISMa), Via Flaminio 9, 00196, Roma, Italy
- Dipartimento di Scienze della Terra, dell'Ambiente e della Vita, Università degli Studi di Genova, Corso Europa 26, 16132, Genoa, Italy
| | - Cecilia Totti
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, via Brecce Bianche, 60131, Ancona, Italy
- Consorzio Interuniversitario Scienze del Mare (CoNISMa), Via Flaminio 9, 00196, Roma, Italy
| |
Collapse
|
35
|
Carnicer O, García-Altares M, Andree KB, Tartaglione L, Dell'Aversano C, Ciminiello P, de la Iglesia P, Diogène J, Fernández-Tejedor M. Ostreopsis cf. ovata from western Mediterranean Sea: Physiological responses under different temperature and salinity conditions. HARMFUL ALGAE 2016; 57:98-108. [PMID: 30170726 DOI: 10.1016/j.hal.2016.06.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 04/26/2016] [Accepted: 06/15/2016] [Indexed: 06/08/2023]
Abstract
The dinoflagellate Ostreopsis cf. ovata proliferates seasonally in the Mediterranean Sea, producing palytoxin-like compounds (ovatoxins) which are considered among the most potent marine toxins. Blooms have been related to several toxic events in which respiratory problems in humans and mortality of benthic marine organisms have been observed. In the coming decades, an increase in temperature and salinity is predicted in the Mediterranean Sea as a consequence of global warming that may provoke alterations in the dynamics of marine microorganisms. In this study, the physiological effects of changes in water temperature and salinity were analyzed, and their interaction through a multi-factorial experiment using two strains of O. cf. ovata in culture that had been isolated from the western Mediterranean Sea. In order to perform an accurate and reliable estimation of cell abundance, hydrochloric acid and sodium-ethylenediaminetetraacetic acid treatments were evaluated for the purpose of disaggregating cell clumps, with the former providing lower counting errors, especially after the stationary phase. Results of the physiological study showed that growth was inhibited at 19°C for all salinities. The highest growth rates were registered at 24°C for both strains (0.48±0.05divday-1), and a significant variability in growth rate was found among salinities at 24°C and 28°C. Two groups were distinguished by cell size in all high temperature conditions and a positive correlation was found between the amount of small cells and growth rate. The concentration of palytoxin-like compounds in the cultures increased with time and significantly higher amounts of toxin were found at 28°C in comparison to 24°C. The results suggest that climate change may not affect intensity of blooms, but their toxicity may be enhanced.
Collapse
Affiliation(s)
- Olga Carnicer
- IRTA, Carretera de Poble Nou, Km 5.5, 43540 Sant Carles de la Ràpita, Spain
| | | | - Karl B Andree
- IRTA, Carretera de Poble Nou, Km 5.5, 43540 Sant Carles de la Ràpita, Spain
| | - Luciana Tartaglione
- Dipartimento di Chimica delle Sostanze Naturali, Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Carmela Dell'Aversano
- Dipartimento di Chimica delle Sostanze Naturali, Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Patrizia Ciminiello
- Dipartimento di Chimica delle Sostanze Naturali, Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | | | - Jorge Diogène
- IRTA, Carretera de Poble Nou, Km 5.5, 43540 Sant Carles de la Ràpita, Spain
| | | |
Collapse
|
36
|
Vanucci S, Guidi F, Pistocchi R, Long RA. Phylogenetic structure of bacterial assemblages co-occurring with Ostreopsis cf. ovata bloom. HARMFUL ALGAE 2016; 55:259-271. [PMID: 28073540 DOI: 10.1016/j.hal.2016.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Revised: 04/05/2016] [Accepted: 04/06/2016] [Indexed: 06/06/2023]
Abstract
Extensive blooms of the toxic epiphytic/benthic dinoflagellate Ostreopsis cf. ovata are being reported with increasing frequency and spatial distribution in temperate coastal regions including the Mediterranean. These blooms are of human and environmental health concern due to the production of isobaric palytoxin and a wide range of ovatoxins by Ostreopsis cf. ovata. Bacterial-microalgal interactions are important regulators in algal bloom dynamics and potentially toxin dynamics. This study investigated the bacterial assemblages co-occurring with O. cf. ovata (OA) and from ambient seawaters (SW) during the early and peak phases of bloom development in NW Adriatic Sea. Fractions of the bacterial assemblages co-occurring with O. cf. ovata (OA) and more closely associated to the mucilage layer (LA) embedding O. cf. ovata cells were also reported. In total, 14 bacterial phyla were detected by targeted 454 pyrosequencing of the 16S rRNA gene. The dominant bacterial phyla in the OA assemblages were Proteobacteria and Bacteroidetes; while at the class level, Alphaproteobacteria were the most abundant (83 and 66%, relative abundance, early and peak bloom phases), followed by Flavobacteria (7 and 19%, early and peak phases). Actinobacteria and Cyanobacteria were of minor importance (<5% of the relative bacterial abundance each). Gammaproteobacteria showed a notably presence in OA assemblage only at the early phase of the bloom (genus Haliea, 13%). The Alphaproteobacteria were predominately composed by the genera Ruegeria, Jannaschia and Erythrobacter which represented about half of the total phylotypes' contribution of OA at both early and peak phases of the O. cf. ovata bloom, suggesting interactions between this consortium and the microalga. Moreover, the highest contribution of Ruegeria (30% of the total phylotypes) was observed at the early phase of the bloom in LA assemblage. Microbial assemblages associated with the ambient seawaters while being also dominated by Alphaproteobacteria and Flavobacteria were partially distinct from those associated with O. cf. ovata due to the presence of genera almost not retrieved in the latter assemblages.
Collapse
Affiliation(s)
- Silvana Vanucci
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, Viale Ferdinando Stagno d'Alcontres 31, 98166 S. Agata, Messina, Italy.
| | - Flavio Guidi
- Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S'Alberto 163, 48123 Ravenna, Italy
| | - Rossella Pistocchi
- Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S'Alberto 163, 48123 Ravenna, Italy
| | - Richard A Long
- Department of Biological Sciences, Florida A&M University, Tallahassee, FL 32307, United States
| |
Collapse
|
37
|
Pezzolesi L, Vanucci S, Dell'Aversano C, Dello Iacovo E, Tartaglione L, Pistocchi R. Effects of N and P availability on carbon allocation in the toxic dinoflagellate Ostreopsis cf. ovata. HARMFUL ALGAE 2016; 55:202-212. [PMID: 28073533 DOI: 10.1016/j.hal.2016.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 02/23/2016] [Accepted: 02/27/2016] [Indexed: 06/06/2023]
Abstract
Blooms of the toxic dinoflagellate Ostreopsis cf. ovata are usually associated with shallow and calm coastal waters, characterized by low nutrient concentrations. The algal cells typically cover the benthic substrates, such as the macroalgal and invertebrate communities and rocks, forming a mucilaginous film. Data reported on O. cf. ovata toxin production observed under both field and culture conditions show high variability in terms of toxic profile and cellular content; little is known about the environmental and physiological aspects which regulate the toxin dynamics. In this study, O. cf. ovata physiology was investigated using batch cultures supplied with nutrient concentrations similar to those found in the Adriatic Sea during the recurrent blooms and the observed cellular dynamics were compared with those found in a culture grown under optimal conditions, used as a reference. Data on the cellular C, N and P content during the growth highlighted a possible important role of the cellular nutritional status in regulating the toxin production that resulted to be promoted under specific intervals of the C:N and C:P ratios. The variable toxicity found for O. cf. ovata in various geographic areas could be related to the different in situ prevalent environmental conditions (e.g., nutrient concentrations) which affect the cellular elemental composition and carbon allocation. The obtained results strongly suggest that in the environment toxin production is steadily sustained by a low and constant nutrient supply, able to maintain appropriate cellular C:N (>12) or C:P (>170) ratios for a long period. These results explain to some extent the variability in toxicity and growth dynamics observed in blooms occurring in the different coastal areas.
Collapse
Affiliation(s)
- Laura Pezzolesi
- Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S'Alberto 163, 48123 Ravenna, Italy.
| | - Silvana Vanucci
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, Viale Ferdinando d'Alcontres 31, 98166 S. Agata, Messina, Italy
| | - Carmela Dell'Aversano
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Emma Dello Iacovo
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Luciana Tartaglione
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Rossella Pistocchi
- Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S'Alberto 163, 48123 Ravenna, Italy
| |
Collapse
|