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Boudriga I, Poindron C, Khammeri Y, Zouari AB, Rossi V, Thyssen M, Desboeufs K, Hassen MB. Corrigendum to "Impact of atmospheric deposition on the dynamics of ultraphytoplanktonic populations in the Gulf of Gabès during an intense dust event (MERITE-HIPPOCAMPE campaign)" [Mar. Pollut. Bull. 200 (2024) 116059]. Mar Pollut Bull 2024; 202:116234. [PMID: 38552534 DOI: 10.1016/j.marpolbul.2024.116234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Affiliation(s)
- Ismail Boudriga
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia.
| | - Charlotte Poindron
- Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013 Paris, France
| | - Yosra Khammeri
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
| | - Amel Bellaaj Zouari
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
| | - Vincent Rossi
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Melilotus Thyssen
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Karine Desboeufs
- Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013 Paris, France
| | - Malika Bel Hassen
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
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Boudriga I, Poindron C, Khammeri Y, Zouari AB, Rossi V, Thyssen M, Desboeufs K, Bel Hassen M. Impact of atmospheric deposition on the dynamics of ultraphytoplanktonic populations in the Gulf of Gabès during an intense dust event (MERITE-HIPPOCAMPE campaign). Mar Pollut Bull 2024; 200:116059. [PMID: 38335628 DOI: 10.1016/j.marpolbul.2024.116059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 12/07/2023] [Accepted: 01/17/2024] [Indexed: 02/12/2024]
Abstract
The ultraphytoplankton composition and dynamics were assessed during a Saharan dust event occurring off the southern Tunisian coasts during the MERITE-HIPPOCAMPE Trans-Mediterranean oceanographic cruise. The composition of atmospheric dust was characterized in terms of nutriments and trace metals. Data-assimilative hydrodynamic model revealed no differences in the hydrological features along the sampling track and almost no water transport occurred during the period of atmospheric deposition. Dust deposition increased the growth rates and the productivity of the major phytoplanktonic cytometric groups, resulting in the highest surface biomass along the Mediterranean transect. One group, distinguished by low fluorescence and nanoplanktonic size, reacted to dust deposition within hours, exhibiting the highest growth rate and net productivity. The dust composition showed a substantial enrichment with organic phosphorous representing (56 % of Total phosphorus) and trace metals mainly Fe, Mn and V.
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Affiliation(s)
- Ismail Boudriga
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia.
| | - Charlotte Poindron
- Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013 Paris, France
| | - Yosra Khammeri
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
| | - Amel Bellaaj Zouari
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
| | - Vincent Rossi
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Melilotus Thyssen
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Karine Desboeufs
- Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013 Paris, France
| | - Malika Bel Hassen
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
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Zarai B, Khaskhoussy K, Zouari M, Souguir D, Khammeri Y, Moussa M, Hachicha M. Smart control of soil water and salt content for improving irrigation management of tomato crop field: Kairouan area. Environ Monit Assess 2023; 195:1408. [PMID: 37921997 DOI: 10.1007/s10661-023-12019-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 10/23/2023] [Indexed: 11/05/2023]
Abstract
A good assessment of soil water and salt content is required for sustainable irrigation with brackish/saline water. The use of the Internet of Things (IoT) has been initiated for the tomato crop (Savera variety) as part of the PRIMA MEDITOMATO project. An experiment was carried out between February and June 2022 at a farmer's site. For continuous soil water and salt content assessment, TEROS (11/12) probes were implemented at depths of 0, 10, 20, 30, and 60 cm. The data logging process was performed by a ZL6 device and delivered by the ZENTRA Cloud web application (METER GROUPE Company). For the accuracy of the introduced sensors, calibration tests were first processed. Results of the calibration of the probes in the laboratory and in situ showed linear relationships between the humidity values measured by ZL6 (θZL6) and those determined by the gravimetric method, with high correlation coefficients (R2) of 0.86 and 0.96, respectively. There were also strong linear relationships between the ECbulk(ZL6) and the ECe measured on saturated paste extract with high correlation coefficients (R2) of 0.96 and 0.95. Corrected data, according to the determined linear regression equations, present the real-time assessment of soil water and salt content over the entire growth stage of tomatoes. The results of this monitoring showed that soil water content remained close to its status at field capacity (32%) at the beginning of the assessment and increased with the intensification of irrigation, reaching 46 and 54% at 20 and 30 cm, respectively, around mid-April. The salinity level was greater with depth. Indeed, it was low in topsoil with the increase in irrigation frequency and higher at 30 and 60 cm toward the end of the tomato cycle. According to this study, real-time data given by ZENTRA Cloud allows us to adjust irrigation management on time.
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Affiliation(s)
- Besma Zarai
- National Research Institute of Rural Engineering, Water and Forests LR16INRGREF02, Non-Conventional Water Valorization, University of Carthage, 17 rue Hédi Karray, B.P no. 10, 2080, Ariana, Tunisia.
| | - Khawla Khaskhoussy
- National Research Institute of Rural Engineering, Water and Forests LR16INRGREF02, Non-Conventional Water Valorization, University of Carthage, 17 rue Hédi Karray, B.P no. 10, 2080, Ariana, Tunisia
| | - Marwa Zouari
- National Research Institute of Rural Engineering, Water and Forests LR16INRGREF02, Non-Conventional Water Valorization, University of Carthage, 17 rue Hédi Karray, B.P no. 10, 2080, Ariana, Tunisia
| | - Dalila Souguir
- National Research Institute of Rural Engineering, Water and Forests LR16INRGREF02, Non-Conventional Water Valorization, University of Carthage, 17 rue Hédi Karray, B.P no. 10, 2080, Ariana, Tunisia
| | - Yosra Khammeri
- National Research Institute of Rural Engineering, Water and Forests LR16INRGREF02, Non-Conventional Water Valorization, University of Carthage, 17 rue Hédi Karray, B.P no. 10, 2080, Ariana, Tunisia
| | - Malak Moussa
- National Research Institute of Rural Engineering, Water and Forests LR16INRGREF02, Non-Conventional Water Valorization, University of Carthage, 17 rue Hédi Karray, B.P no. 10, 2080, Ariana, Tunisia
| | - Mohamed Hachicha
- National Research Institute of Rural Engineering, Water and Forests LR16INRGREF02, Non-Conventional Water Valorization, University of Carthage, 17 rue Hédi Karray, B.P no. 10, 2080, Ariana, Tunisia
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Boudriga I, Abdennadher M, Khammeri Y, Mahfoudi M, Quéméneur M, Hamza A, Bel Haj Hmida N, Zouari AB, Hassen MB. Karenia selliformis bloom dynamics and growth rate estimation in the Sfax harbour (Tunisia), by using automated flow cytometry equipped with image in flow, during autumn 2019. Harmful Algae 2023; 121:102366. [PMID: 36639188 DOI: 10.1016/j.hal.2022.102366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 12/01/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
A Karenia selliformis bloom event in the Gulf of Gabès (Mediterranean Sea), was monitored over 9 days at high frequency during fall 2019, by using an automated flow cytometer (Cytosense, Cytobuoy b.v.) with an image-in-flow attachment. The instrument recorded the shape of the optical signals that lead to the resolution of six cell groups of pico-, nano- and microphytoplankton, during the Harmful Algal Bloom (HAB). K. selliformis cell dimensions derived from the hourly records, enabled to estimate the daily division rate over the bloom period. Results revealed that K. selliformis was the only bloom-forming species and it reached its highest mean abundance the fourth day of the survey. A shift in the nutrient composition occurred with a potential P limitation during the bloom growth and N limitation during the bloom collapse. The co-inertia analysis revealed opposite patterns for K. selliformis and heterotrophic prokaryotes suggesting trophic interactions and possible mixotrophic behaviour of K. selliformis at the end of the bloom. K. selliformis exhibited low growth rates generally < 1 division day-1, which could not explain the observed high abundance. The tide played a crucial role in the dynamics of K. selliformis at a semi-diurnal scale and at spring-neap tide scale and was probably enhancing K. selliformis accumulation.
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Affiliation(s)
- Ismail Boudriga
- INSTM - Institut National des Sciences et Technologies de la Mer, Tunisia.
| | | | - Yosra Khammeri
- INSTM - Institut National des Sciences et Technologies de la Mer, Tunisia
| | - Mabrouka Mahfoudi
- INSTM - Institut National des Sciences et Technologies de la Mer, Tunisia
| | - Marianne Quéméneur
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Asma Hamza
- INSTM - Institut National des Sciences et Technologies de la Mer, Tunisia
| | | | | | - Malika Bel Hassen
- INSTM - Institut National des Sciences et Technologies de la Mer, Tunisia
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Quéméneur M, Bel Hassen M, Armougom F, Khammeri Y, Lajnef R, Bellaaj-Zouari A. Prokaryotic Diversity and Distribution Along Physical and Nutrient Gradients in the Tunisian Coastal Waters (South Mediterranean Sea). Front Microbiol 2020; 11:593540. [PMID: 33335519 PMCID: PMC7735998 DOI: 10.3389/fmicb.2020.593540] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 10/26/2020] [Indexed: 01/18/2023] Open
Abstract
Prokaryotes play an important role in biogeochemical cycling in marine ecosystems, but little is known about their diversity and composition, and how they may contribute to the ecological functioning of coastal areas in the South Mediterranean Sea. This study investigated bacterial and archaeal community diversity in seawater samples along the Tunisian coast subject to important physicochemical disturbances. The 16S amplicon sequencing survey revealed higher prokaryotic diversity in the northern Tunisian bays than in southeastern waters (Gulf of Gabès). The major taxonomic groups identified in all samples were Alphaproteobacteria (40.9%), Gammaproteobacteria (18.7%), Marine Group II Euryarchaeota (11.3%), and Cyanobacteria (10.9%). Among them, the relative abundance of Alteromonadales, Prochlorococcus, and some clades of Pelagibacterales (SAR11) significantly differed between the northern and the southern bays, whereas no difference was observed across coastal waters in the archaeal Candidatus Poseidoniales (MGII), Synechococcus, and Pelagibacteraceae (SAR11 clade Ia), for which no relationship was observed with the environmental variables. Both Pseudoalteromonas and Alteromonas levels increased with the increasing salinity, density and nutrients (NH4 + and/or PO4 3-) gradients detected toward the southern waters, while the SAR11 clades Ib and IV and Prochlorococcus, decreased in the shallow, salty and nutrient-rich coastal waters of the Gulf of Gabès. Rhodobacteraceae was positively correlated with Synechococcus and chlorophyll levels, suggesting a relationship with phytoplankton biomass. The present study provides the first insights into planktonic prokaryotic community composition in the South Mediterranean Sea through the analysis of Tunisian seawaters, which may support further investigations on the role of bacterioplankton in the biogeochemistry of these ecosystems.
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Affiliation(s)
- Marianne Quéméneur
- Aix-Marseille Univ, University of Toulon, CNRS, IRD, MIO UM 110, Mediterranean Institute of Oceanography, Marseille, France
| | - Malika Bel Hassen
- Institut National des Sciences et Technologies de la Mer, Salammbô, Tunis, Tunisia
| | - Fabrice Armougom
- Aix-Marseille Univ, University of Toulon, CNRS, IRD, MIO UM 110, Mediterranean Institute of Oceanography, Marseille, France
| | - Yosra Khammeri
- Institut National des Sciences et Technologies de la Mer, Salammbô, Tunis, Tunisia
| | - Rim Lajnef
- Institut National des Sciences et Technologies de la Mer, Salammbô, Tunis, Tunisia
| | - Amel Bellaaj-Zouari
- Institut National des Sciences et Technologies de la Mer, Salammbô, Tunis, Tunisia
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