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Ishak S, Allouche M, Alotaibi GS, Alwthery NS, Al-Subaie RA, Al-Hoshani N, Plavan OA, Selamoglu Z, Özdemir S, Plavan G, Badraoui R, Rudayni HA, Boufahja F. Experimental and computational assessment of Antiparkinson Medication effects on meiofauna: Case study of Benserazide and Trihexyphenidyl. MARINE POLLUTION BULLETIN 2024; 205:116668. [PMID: 38972217 DOI: 10.1016/j.marpolbul.2024.116668] [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: 02/16/2024] [Revised: 06/28/2024] [Accepted: 06/28/2024] [Indexed: 07/09/2024]
Abstract
Two concentrations (6.25 and 1.25 mg/L) were used for two Parkinson's disease medications, Benserazide, and Trihexyphenidyl, to test their effects on the meiobenthic nematofauna. It is predicted that these highly hydrosoluble drugs will end up in marine environments. The results showed that both medications when added alone, induced (i) important changes in the numbers and (ii) taxonomic composition. The impact of Benserazide and Trihexyphenidyl was also reflected in the (iii) functional traits of nematofauna, with the most affected categories following exposure being the trophic group 1B, the clavate tails, the circular amphids, the c-p2 life history, and the body length of 1-2 mm. These results were supported by the molecular interactions of the studied drugs with both GLD-3 and SDP proteins of Caenorhabditis elegans. (iv) The mixtures of both drugs did not show any changes in the nematode communities, suggesting that no synergistic or antagonistic interactions exist between them.
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Affiliation(s)
- Sahar Ishak
- LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Faculty of Sciences of Bizerte, University of Carthage, Zarzouna 7021, Tunisia
| | - Mohamed Allouche
- LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Faculty of Sciences of Bizerte, University of Carthage, Zarzouna 7021, Tunisia; Biology Department, Higher Institute of Biotechnology of Beja, University of Jendouba, 9000, BP: 382, Tunisia
| | - Ghadah S Alotaibi
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia.
| | - Nada S Alwthery
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia.
| | - Raghad A Al-Subaie
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia.
| | - Nawal Al-Hoshani
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
| | - Oana-Alexandra Plavan
- Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, Iasi, Romania.
| | - Zeliha Selamoglu
- Department of Medical Biology, Medicine Faculty, Nigde Omer Halisdemir University, Nigde, Turkey.
| | - Sadin Özdemir
- Food Processing Programme Technical Science Vocational School Mersin University, TR-33343 Yenisehir, Mersin, Turkey.
| | - Gabriel Plavan
- Department of Biology, Faculty of Biology, "Alexandru Ioan Cuza" University, Bvd. Carol I, No. 20A, 700505, Iasi, Romania.
| | - Riadh Badraoui
- Department of Biology, Laboratory of General Biology, College of Science, University of Ha'il, Ha'il 81451, Saudi Arabia; Section of Histology-Cytology & Cytogenetics, Faculty of Medicine of Tunis, University of Tunis El Manar, 1007 La Rabta-Tunis, Tunisia.
| | - Hassan A Rudayni
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia.
| | - Fehmi Boufahja
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia.
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2
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Spedicato A, Zeppilli D, Thouzeau G, Cuny P, Militon C, Sylvi L, Hubas C, Dirberg G, Jézéquel R, Barrière G, Michel LN, Bezerra TN, Michaud E. Deciphering environmental forcings in the distribution of meiofauna and nematodes in mangroves of the Atlantic-Caribbean-East Pacific and Indo-West Pacific regions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172612. [PMID: 38663602 DOI: 10.1016/j.scitotenv.2024.172612] [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: 12/04/2023] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 05/02/2024]
Abstract
Mangroves develop under environmental conditions and anthropogenic pressures whose impact on benthic meiofauna remains poorly understood. It is unclear how meiofauna communities are structured according to local sedimentary conditions. This study was designed to characterize the community structure of meiofauna and nematodes (dominant taxa) and the associated environmental forcings in intertidal mangrove sediments from Mayotte (Indo-West-Pacific), Martinique and Guadeloupe (Caribbean). Sediment cores were sampled at the end of the dry season at low tide on adult mangrove stands with similar immersion time. In each sediment layer, we analyzed redox potential, pH, porewater salinity, grain size, organic matter, metals, organic contaminants, prokaryotes and meiofauna. Our results show that sediments far from cities and agricultural fields trapped site-specific contaminants due to local water transport processes. Some metals, PAHs or pesticides exceeded toxicity thresholds in most of the studied stations, thus being harmful to benthic fauna. The sedimentary environment acts as a filter selecting specific meiofauna communities at station scale only in the Caribbean. In Mayotte, horizontal homogeneity contrasts with vertical heterogeneity of the sedimentary environment and the meiofauna. Nematode genera showed particular distribution patterns horizontally and vertically, suggesting the presence of sediment patches suitable for a restricted pool of genera on each island. Results in the Caribbean are consistent with nested diversity patterns due to environmental filtering. Conversely, horizontal homogeneity at Mayotte would reflect greater dispersal between stations or more spatially homogeneous anthropogenic pressures. The nematode genera present at depth may not be the most specialized, but the most versatile, capable of thriving in different conditions. Terschellingia and Daptonema showed contrasted responses to environmental forcing, likely due to their versatility, while Desmodora showed uniform responses between study areas, except when toxicity thresholds were exceeded. Our results emphasize that a given genus of nematode may respond differently to sedimentary conditions depending on sites.
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Affiliation(s)
- Adriana Spedicato
- Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France.
| | - Daniela Zeppilli
- Univ Brest, Ifremer, Biologie et Ecologie des Ecosystèmes marins Profonds, F-29280 Plouzané, France.
| | - Gérard Thouzeau
- Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France.
| | - Philippe Cuny
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| | - Cécile Militon
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| | - Léa Sylvi
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, 13288 Marseille, France.
| | - Cédric Hubas
- Biologie des Organismes et Ecosystèmes Aquatiques (UMR 8067 BOREA) Muséum National D'Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Station Marine de Concarneau, 29900 Concarneau, France.
| | - Guillaume Dirberg
- Biologie des Organismes et Ecosystèmes Aquatiques (UMR 8067 BOREA) Muséum National D'Histoire Naturelle, CNRS, Sorbonne Université, IRD, UCN, UA, Station Marine de Concarneau, 29900 Concarneau, France
| | - Ronan Jézéquel
- CEDRE, 715 rue Alain Colas, 29218 Brest Cedex 2, France.
| | - Guerric Barrière
- Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France.
| | | | | | - Emma Michaud
- Univ Brest, CNRS, IRD, Ifremer, LEMAR - UMR 6539, F-29280 Plouzané, France.
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3
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Mohammad DA, Al-Farga A, Sami M. Experimental study of organic enrichment on meiofaunal diversity. Sci Rep 2024; 14:10681. [PMID: 38724542 PMCID: PMC11082245 DOI: 10.1038/s41598-024-60690-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 04/26/2024] [Indexed: 05/12/2024] Open
Abstract
The organic enrichment effects on the meiofauna and nematofauna were assessed for field sediment and other experimental ones enriched with organic matters conducted in the laboratory for 4 weeks. Also, dissolved oxygen (DO) and pH were monitored for each one. The abundance and diversity of meiofaunal groups and nematofauna varied. Strong significant correlations were found between DO and the studied items. Nematoda was the most abundant group in the field sediment and other experimental ones; their counts increased with the increase in organic enrichments and were dominated by deposit feeders. Amphipoda, Ostracoda and predator/omnivore nematodes disappeared in highly organic-enriched sediments. Changes in DO and organic enrichments might be the more attributable reasons for the alteration of the meiobenthic assemblages. The generic compositions of Nematoda provide a good indicator for environmental alterations.
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Affiliation(s)
- Deyaaedin A Mohammad
- Department of Marine Science, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | - Ammar Al-Farga
- Department of Biochemistry, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Mahmoud Sami
- Department of Marine Science, Faculty of Science, Suez Canal University, Ismailia, Egypt.
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4
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Bin-Jumah MN. Are anticoagulant drugs ecotoxic for meiobenthic nematodes from Saudi Arabia? First data on taxon/functional diversity and computational evidences. MARINE POLLUTION BULLETIN 2024; 200:116029. [PMID: 38262212 DOI: 10.1016/j.marpolbul.2024.116029] [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: 12/06/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/25/2024]
Abstract
Community-level effects of anticoagulants have little been studied in the laboratory. In the current study, the different effects of Warfarin and Tinzaparin, individually or in combination, on meiofauna were investigated for the first time using two concentrations (5 and 25 mg·l-1) of Warfarin (W1 and W2) and Tinzaparin (T1 and T2) for 30 days. The results obtained highlighted the highest tolerance of nematodes and amphipods toward the two anticoagulants tested. Moreover, nematode abundance and taxonomic diversity decreased directly after exposure to T2 and T2W1 because of the high mortality of diatom feeders and their replacement by non-selective deposit feeders (case of Tinzaparin) or omnivores-carnivores (case of Warfarin). The relative taxon/functional similarity between controls and mixtures T1W1 and T2W2 recommends that the toxicity of Tinzaparin can be attenuated by Warfarin. Finally, the computational study of Warfarin supports its potential ecotoxicity since it satisfactorily bound and interacted with GLD-3 and SDP macromolecules.
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Affiliation(s)
- May Nasser Bin-Jumah
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, 84428, Riyadh 11671, Saudi Arabia.
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5
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Bellakhal M, Ishak S, Al-Hoshani N, Qurtam AA, Al-Zharani M, Pacioglu O, Boufahja F. The multifaceted effects of fluoranthene and polystyrene on the taxonomic composition and associated functional traits of marine meiofauna, by using single and mixture applications. MARINE POLLUTION BULLETIN 2023; 194:115390. [PMID: 37573818 DOI: 10.1016/j.marpolbul.2023.115390] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/31/2023] [Accepted: 08/04/2023] [Indexed: 08/15/2023]
Abstract
The current experiment measured the multifaceted effects of polystyrene and fluoranthene, acting alone or in a mixture on marine meiofauna, but with a special focus on nematodes' morphological and functional traits. The results showed changes in the abundances for all tested concentrations of both compounds. The nematode communities exposed to the highest concentrations of fluoranthene (30 ng.g-1 Dry Weight (DW)) and polystyrene (100 mg.kg-1 DW) alone or in a mixture, were significantly less diverse compared to control and were associated with significant changes in the percentage of taxonomic composition and feeding-guilds. The most sensitive taxa to fluoranthene comprised epistratum feeders, whereas the nematodes mostly affected by polystyrene were omnivores-carnivores. A new functional tool, the Index of Sensitivity (IOS), proved to be reliable in depicting the changes that occurred in the taxonomic and functional features of the nematofauna.
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Affiliation(s)
- Meher Bellakhal
- Higher Institute of Fishery and Aquaculture of Bizerte, University of Carthage, Tunisia
| | - Sahar Ishak
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Nawal Al-Hoshani
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Ashraf A Qurtam
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Mohammed Al-Zharani
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Octavian Pacioglu
- National Institute of Research and Development for Biological Sciences, Bucharest, Romania
| | - Fehmi Boufahja
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia.
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6
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Ridall A, Ingels J. Nematode community structures in the presence of wastewater treatment plant discharge. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:991. [PMID: 37491643 DOI: 10.1007/s10661-023-11555-5] [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: 03/08/2023] [Accepted: 06/24/2023] [Indexed: 07/27/2023]
Abstract
Wastewater treatment plants (WWTPs) represent major point sources of pollution in coastal systems, affecting benthic ecosystems. In the present study, we assessed the potential role that WWTPs have in shaping nematode communities and established baseline knowledge of free-living nematode community structures in St. Andrew Bay, Florida. Sediment samples were collected from four sites representing areas of WWTP outflow and areas with no apparent outflow, during the winter and summer. Nematode communities across sites were significantly different, and the differences were strongly associated with the distance to the nearest WWTP. While the communities were not different along transects at each site, nor across seasons, community dissimilarity across sites was high, implying strong contrasts throughout the bay system. Dominance of tolerant, opportunistic genera and Ecological Quality Status assessments suggest that the system is stressed by organic enrichment, possibly linked to the WWTPs. Our results suggest that knowledge on the life-history of dominant genera is imperative to assess the ecological quality of a benthic system, in addition to taxonomic and functional metrics. Considering the value of marine nematodes as bioindicators, more work should be done to monitor temporal variability in nematode communities in this system as future infrastructure changes alter its dynamics.
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Affiliation(s)
- Aaron Ridall
- Department of Biological Science, Florida State University, 319 Stadium Dr, Tallahassee, FL, 32306, USA.
- Florida State University Coastal and Marine Laboratory, 3618 Coastal Highway 98, St. Teresa, FL, 32358, USA.
| | - Jeroen Ingels
- Florida State University Coastal and Marine Laboratory, 3618 Coastal Highway 98, St. Teresa, FL, 32358, USA
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7
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Hua E, He L, Zhang Z, Cui C, Liu X. Bioassessment of environmental quality based on taxonomic and functional traits of marine nematodes in the Bohai Sea, China. MARINE POLLUTION BULLETIN 2023; 190:114884. [PMID: 37011536 DOI: 10.1016/j.marpolbul.2023.114884] [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: 02/07/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
Free-living marine nematodes are valuable biological indicators for different environmental disturbances. Their taxonomic composition and functional traits often respond to environmental changes. In this study, marine nematodes, collected from the Bohai sea on the northeastern coast of China in 2014, were investigated in terms of their taxonomic composition and functional traits. Furthermore, the environmental quality of the investigated area was assessed based on nematode metrics. The studied nematode community showed spatial variation in taxonomic and functional composition, in response to changes in environmental variables such as sediment chlorophyll-a, phaeophytin-a, organic matter content, silt-clay content etc. Overall, high percentage of tolerant marine nematodes species or colonizers predominated, suggesting a disturbed environmental condition of the study area. Further results from the environmental quality assessment based on nematode metrics indicated a moderate quality status at the most investigated stations.
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Affiliation(s)
- Er Hua
- College of Marine Life Sciences, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China
| | - Lei He
- College of Marine Life Sciences, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China
| | - Zhinan Zhang
- College of Marine Life Sciences, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China
| | - Chunyan Cui
- College of Marine Life Sciences, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China
| | - Xiaoshou Liu
- College of Marine Life Sciences, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China; Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
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8
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Badraoui R, Allouche M, El Ouaer D, Siddiqui AJ, Ishak S, Hedfi A, Beyrem H, Pacioglu O, Rudayni HA, Boufahja F. Ecotoxicity of chrysene and phenanthrene on meiobenthic nematodes with a case study of Terschellingia longicaudata: Taxonomics, toxicokinetics, and molecular interactions modelling. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120459. [PMID: 36273696 DOI: 10.1016/j.envpol.2022.120459] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are toxic for humans and marine fauna alike. The current study assessed the impact of PAHs on the migratory behaviour of meiobenthic nematodes collected from the Bizerte lagoon, Tunisia. The experiment lasted for 15 days and was carried in open microcosms, which comprised a lower, contaminated and an upper, uncontaminated compartment. Three treatments were used, for each of them an untreated control was set up: sediment contaminated with chrysene (116 ng g-1 dry weight (DW), with phenanthrene (116 ng g-1 DW) and a mixture of both. The results showed a significant decrease in diversty and abundance in the lower, contaminated compartments compared to the upper zones. The results also highlighted that under an increased stress some species progressively increased in number, these were considered PAH-tolerant species such as Odontophora villoti, some others had an occasionally increased in number were considered as opportunistic species, such as Paracomesoma dubium and the species that showed a progressive decreased in number, such as Metoncholaimus pristiurus and Steineria sp., Terschellingia. longicaudata, and Oncholaimellus sp. were classified as PAH-sensitive. Moreover, an increase in the activity of biochemical biomarkers was observed following the exposure of males and gravid females of T. longicaudata to 29, 58 and 87 ng g-1 DW of chrysene and phenanthrene paralleled by a higher vulnerability of the latter demographic category. Besides, a significant decrease in fertility of females and an increase in pharyngeal sucking power were observed for both types of PAHs considered. The sex ratio was also significantly imbalanced in the favor of males, which suggest that chrysene and phenanthrene affect also the hormone system of T. longicaudata. The high affinities of these PAHs and their molecular interactions with both germ line development protein 3 (GLD-3) and sex-determining protein (SDP) may justify these results and explain the toxicokinetic attributes.
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Affiliation(s)
- Riadh Badraoui
- Department of Biology, Laboratory of General Biology, College of Science, University of Ha'il, Ha'il, 81451, Saudi Arabia; Section of Histology-Cytology, Medicine Faculty of Tunis, University of Tunis El Manar, 1007 La Rabta, Tunis, Tunisia
| | - Mohamed Allouche
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Dhia El Ouaer
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Arif J Siddiqui
- Department of Biology, Laboratory of General Biology, College of Science, University of Ha'il, Ha'il, 81451, Saudi Arabia
| | - Sahar Ishak
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Amor Hedfi
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Hamouda Beyrem
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Octavian Pacioglu
- National Institute of Research and Development for Biological Sciences, Bucharest, Romania
| | - Hassan A Rudayni
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11623, Saudi Arabia
| | - Fehmi Boufahja
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11623, Saudi Arabia.
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9
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Hedfi A, Allouche M, Hoineb F, Ali MB, Harrath AH, Albeshr MF, Mahmoudi E, Beyrem H, Karachle PK, Urkmez D, Pacioglu O, Badraoui R, Boufahja F. The response of meiobenthinc sediment-dwelling nematodes to pyrene: Results from open microcosms, toxicokinetics and in silico molecular interactions. MARINE POLLUTION BULLETIN 2022; 185:114252. [PMID: 36272318 DOI: 10.1016/j.marpolbul.2022.114252] [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: 03/16/2022] [Revised: 10/09/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
An experiment conducted with 'open microcosm' made by connected sedimentary compartments with different qualities was for 30 days to evaluate the migratory behaviour of nematodes as induced by exposure to pyrene. The nematofauna was collected along with sediment from a reference site in Bizerte lagoon. Following one week acclimatization period, the populated sediments were topped with azoic sediments, with a pyrene concentration of 150 μg kg-1. The concentration of pyrene from sediments was measured on a weekly basis. A stable status of nematode assemblages was reached between the upper and lower compartments in each microcosm, whatever the treatment type. An upward exploratory phase was observed during the first two weeks within the assemblages, possibly induced by the repellent chemodetection of pyrene. This observation was confirmed by the toxicokinetic properties and molecular interactions of pyrene with the germ-line development Protein 3 and sex-determining protein of Caenorhabditis elegans as nematode model.
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Affiliation(s)
- Amor Hedfi
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Mohamed Allouche
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Faten Hoineb
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Manel Ben Ali
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Abdel Halim Harrath
- King Saud University, Zoology Department, College of Science, Box 2455, Riyadh 11451, Saudi Arabia
| | - Mohammed Fahad Albeshr
- King Saud University, Zoology Department, College of Science, Box 2455, Riyadh 11451, Saudi Arabia
| | - Ezzeddine Mahmoudi
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Hamouda Beyrem
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Paraskevi K Karachle
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland waters, 46.7 Athens-Sounio Ave., P.O. Box 712, 19013 Anavyssos, Attika, Greece
| | - Derya Urkmez
- Sinop University, Scientific and Technological Research and Application Center, TR57000 Sinop, Turkey
| | - Octavian Pacioglu
- National Institute of Research and Development for Biological Sciences, Bucharest, Romania
| | - Riadh Badraoui
- Section of Histology-Cytology, Medicine Faculty of Tunis, University of Tunis El Manar, 1007 La Rabta, Tunis, Tunisia
| | - Fehmi Boufahja
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia.
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10
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Quang NX, Yen NTM, Thai TT, Yen NTH, Van Dong N, Hoai PN, Lins L, Vanreusel A, Veettil BK, Hiep ND, Bang HQ, Quan NH, Prozorova L. Impact of a dam construction on the intertidal environment and free-living nematodes in the Ba Lai, Mekong Estuaries, Vietnam. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:770. [PMID: 36255542 DOI: 10.1007/s10661-022-10187-5] [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: 10/20/2021] [Accepted: 05/28/2022] [Indexed: 06/16/2023]
Abstract
The impact of high siltation and accumulation of organic and waste material in the intertidal of the dammed Ba Lai River in Vietnam as part of the Mekong estuarine system was investigated by means of marine free-living nematodes. Nutrients content (nitrate, ammonium, total phosphorus, total nitrogen), total suspended solids, total organic carbon, coliform, bacteria E. coli, pH, dissolved oxygen, total dissolved solids, methane and hydrogen sulfide concentration, and the nematode communities were characterized in sediment at selected stations along the river above and below the dam. Our results found elevated methane concentrations at the upstream side of the dam while hydrogen sulfide concentrations found to be highest in the downstream side of the dam. Furthermore, methane and hydrogen sulfide concentrations were correlated to nematode community characteristics such as trophic composition densities and genera composition. There was a clear difference between the communities above and below the dam. The discontinuous nematode community distribution indicated that the Ba Lai River is impacted by dam construction. Potentially the high deposition and eutrophication could turn the area into a methane-rich area related to predicted impact on nematodes.
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Affiliation(s)
- Ngo Xuan Quang
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam.
- Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan, Dist.3, Ho Chi Minh city, Vietnam.
| | - Nguyen Thi My Yen
- Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan, Dist.3, Ho Chi Minh city, Vietnam
| | - Tran Thanh Thai
- Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan, Dist.3, Ho Chi Minh city, Vietnam
| | | | - Nguyen Van Dong
- Faculty of Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Nguyen Van Cu Str., Dist. 5, Ho Chi Minh City, Vietnam
| | - Pham Ngoc Hoai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
- Thu Dau Mot University, Binh Duong, Vietnam
| | - Lidia Lins
- Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium
| | - Ann Vanreusel
- Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium
| | - Bijeesh Kozhikkodan Veettil
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, 700000, Vietnam
- Faculty of Information Technology, Duy Tan University, Da Nang, 550000, Vietnam
| | - Nguyen Duc Hiep
- Environmental Quality, Atmospheric Science and Climate Change Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Ho Quoc Bang
- Institute for Environment and Resources, National University, Ho Chi Minh City, Vietnam
| | - Nguyen Hong Quan
- Institute for Circular Economy Development, National University, Ho Chi Minh City, Vietnam
| | - Larisa Prozorova
- Far Eastern Branch of Russian Academy of Sciences, Federal Scientific Center of the East Asia Terrestrial Biodiversity, Vladivostok, Russia
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11
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Hedfi A, Ben Ali M, Korkobi M, Allouche M, Harrath AH, Beyrem H, Pacioglu O, Badraoui R, Boufahja F. The exposure to polyvinyl chloride microplastics and chrysene induces multiple changes in the structure and functionality of marine meiobenthic communities. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129161. [PMID: 35739702 DOI: 10.1016/j.jhazmat.2022.129161] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
The effects of microplastics and sorbed polycyclic aromatic hydrocarbons at community levels were rarely assessed in laboratory experiments, despite their obvious advantage in reflecting better the natural conditions compared to traditionally single species-focused toxicological experiments. In the current study, the multifaceted effects of polyvinyl chloride and chrysene, acting alone or combined, on general marine meiobenthos, but with a special focus on free-living marine nematode communities were tested in a laboratory experiment carried in microcosms. The meiobenthos was exposed to two polyvinyl chloride (5 and 10 mg.kg-1 Dry Weight 'DW') and chrysene (37.5 and 75 ng.g-1 DW) concentrations, respectively, as well as to a mixture of both compounds, for 30 days. The results highlighted a significant decrease in the abundance of all meiobenthic generic groups, including nematodes, directly with increasing dosages of these compounds when added alone. The addition of chrysene adheres to microplastics, making the sediment matrix glueyer, hence inducing greater mortality among generic meiobenthic groups. Moreover, the nematofauna went through a strong restructuring phase following the exposure to both compounds when added alone, leading to the disappearance of sensitive nematodes and their replacement with tolerant taxa. However, the similarity in nematofauna composition between control and polyvinyl chloride and chrysene mixtures suggests that the toxicity of the latter could be attenuated by its physical bonding to the former pollutant. Other changes in the functional traits within the nematode communities were a decline in the fertility of females and an increase of the pharyngeal pumping power following exposure to both pollutants for the dominant species. The latter results were also supported by additional toxicokinetics analyses and in silico modeling.
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Affiliation(s)
- Amor Hedfi
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Manel Ben Ali
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Marwa Korkobi
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Mohamed Allouche
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Abdel Halim Harrath
- King Saud University, Zoology Department, College of Science, Box 2455, Riyadh 11451, Saudi Arabia
| | - Hamouda Beyrem
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia
| | - Octavian Pacioglu
- National Institute of Research and Development for Biological Sciences, Bucharest, Romania
| | - Riadh Badraoui
- Section of Histology-Cytology, Medicine Faculty of Tunis, University of Tunis El Manar, 1007 La Rabta-Tunis, Tunisia
| | - Fehmi Boufahja
- University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021 Zarzouna, Tunisia.
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12
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The Antidepressants Amitriptyline and Paroxetine Induce Changes in the Structure and Functional Traits of Marine Nematodes. SUSTAINABILITY 2022. [DOI: 10.3390/su14106100] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Increasing concentrations of the antidepressants amitriptyline and paroxetine were determined recently in marine habitats. However, their impact on marine biota is understudied, despite multiple undesirable effects they have on the environment. An important behavioral aspect that is increasingly measured following exposure to contaminants is the migration of fauna from contaminated areas. Hence, our aim was to better understand the migration pattern of marine meiobenthic fauna, but with a main focus on nematodes, following the exposure to both antidepressants, alone or in mixture. The experiment was carried out in microcosms, which comprised an uncontaminated upper and a lower contaminated compartment, where amitriptyline was added, alone or mixed with paroxetine, at concentrations of 0.4 and 40 µg L−1. The overall abundance of meiobenthic groups decreased significantly following exposure to amitriptyline in both compartments, a pattern augmented by the mixture with paroxetine. The migration of nematodes towards the upper compartments of microcosms was triggered by the level of contamination with antidepressants. As such, the species Terschellingia longicaudata showed no significant change in abundance, suggesting tolerance to both antidepressants. On the other hand, the abundances of nematode taxa Cyatholaimus prinzi, Calomicrolaimus sp., Calomicrolaimus honestus, Neochromadora sp., Chromadorina sp. and Chromadorina minor decreased significantly following the exposure to both antidepressants, even at low concentrations. At the end of the experiment, the dominant migratory nematodes belonged to deposit-feeders and omnivores-carnivores trophic guilds, with tail shapes of e/f types and body-sizes longer than 2 mm. Such functional traits increase their mobility in sediments and the chance to move away from contaminated habitats. Moreover, the sex ratio was imbalanced in the favor of males in contaminated lower compartments with mixtures of the lowest and highest concentrations of amitriptyline and paroxetine, suggesting that these drugs also affect the hormone system. In conclusion, the exposure to the antidepressants amitriptyline and paroxetine triggered important changes within nematode communities, as changes in taxonomic composition were a result of migration and survival of tolerant taxa, but equally acting on the hormone system and leading to unbalanced sex-ratio among the residents.
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13
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What Is the Impact of Dexamethasone and Prednisolone Glucocorticoids on the Structure of Meiobenthic Nematode Communities? SUSTAINABILITY 2022. [DOI: 10.3390/su14095344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The toxic effects of two commonly used glucocorticoids, the dexamethasone and prednisolone, on meiobenthic nematodes were assessed in a laboratory experiment for 30 days. Nine treatments were employed, comprised of two single and mixed concentrations of dexamethasone and prednisolone (i.e., 0.14 and 1.4 µg·L−1). The exposure to both glucocorticoids showed significant effects on the abundance and taxonomic diversity of nematodes. Such changes were mainly induced by the decrease in the abundance of the species Microlaimus honestus, considered to be sensitive to prednisolone and by the increase in Enoplolaimus longicaudatus abundance, which can be considered tolerant. The exposure to these glucocorticoids also led to a decrease in 2A feeding groups, 2–4 mm body-size interval, and c-p3 life history type in most treatments, with type of life history and shape of amphids as the most relevant functional traits impacted by these two glucocorticoids. The results could also be explained by the potential antagonism between these two pharmaceuticals.
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14
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Ferraz MA, Kiyama AC, Primel EG, Barbosa SC, Castro ÍB, Choueri RB, Gallucci F. Does pH variation influence the toxicity of organic contaminants in estuarine sediments? Effects of Irgarol on nematode assemblages. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152944. [PMID: 35007601 DOI: 10.1016/j.scitotenv.2022.152944] [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: 10/13/2021] [Revised: 12/21/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
Natural pH values in coastal waters vary largely among locations, ecosystems, and time periods; still, there is an ongoing acidification trend. In this scenario, more acidic pH values can alter bioavailability of organic contaminants, to organisms. Despite this, interactive effects between pH and chemical substances are not usually considered in Ecological Risk Assessment protocols. This study investigated the effects of pH on the toxicity of a hydrophobic organic compound on a benthic community using a microcosm experiment setup to assess the response of nematode assemblages exposed to environmentally relevant concentrations of Irgarol at two natural pH conditions. Estuarine nematode assemblages were exposed to two concentrations of Irgarol at pH 7.0 and 8.0 for periods of 7 and 35 days. Lower diversity of nematode genera was observed at the highest tested Irgarol concentration (1281 ± 65 ng.g-1). The results showed that the effects of Irgarol contamination were independent of pH variation, indicating no influence of acidification within this range on the toxicity of Irgarol to benthic meiofauna. However, the results showed that estuarine nematode assemblages are impacted by long-term exposure to low (but naturally occurring) pHs. This indicates that estuarine organisms may be under naturally high physiological pressure and that permanent changes in the ecosystem's environmental factors, such as future coastal ocean acidification, may drive organisms closer to the edges of their tolerance windows.
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Affiliation(s)
- Mariana Aliceda Ferraz
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
| | - Ana Carolina Kiyama
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
| | - Ednei Gilberto Primel
- Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, RS 96201-900, Brazil
| | - Sergiane Caldas Barbosa
- Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, RS 96201-900, Brazil
| | - Ítalo Braga Castro
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
| | - Rodrigo Brasil Choueri
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil.
| | - Fabiane Gallucci
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
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15
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Hedfi A, Ali MB, Noureldeen A, Almalki M, Rizk R, Mahmoudi E, Plăvan G, Pacioglu O, Boufahja F. Effects of benzo(a)pyrene on meiobenthic assemblage and biochemical biomarkers in an Oncholaimus campylocercoides (Nematoda) microcosm. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:16529-16548. [PMID: 34651273 DOI: 10.1007/s11356-021-16885-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
A microcosm experiment was carried out to determine how benzo(a)pyrene (BaP) may affect marine meiofauna community, with a main emphasis on nematode structure and functional traits. Three increasing concentrations of BaP (i.e. 100, 200 and 300 ng/l, respectively) were used for 30 days. The results revealed a gradual decrease in the abundance of all meiobenthic groups (i.e. nematodes, copepods, amphipods, polychaetes and oligochaetes), except for isopods. Starting at concentrations of 200 and 300 ng/l BaP, respectively, significant changes were observed at community level. At taxonomic level, the nematode communities were dominated at the start of the experiment and also after being exposed or not to BaP by Odontophora villoti, explicable through its high ecologic ubiquity and the presence of well-developed chemosensory organs (i.e. amphids), which potentially increased the avoidance reaction following exposure to this hydrocarbon. Moreover, changes in the activity of several biochemical biomarkers (i.e. catalase 'CAT', gluthatione S-transferase 'GST', and ethoxyresorufin-O-deethylase 'EROD') were observed in the nematode species Oncholaimus campylocercoides, paralleled by significant decreases in CAT activity for non-gravid females compared to controls at concentrations of 25 ng/l BaP and associated with significant increase in GST and EROD activities for both types of individuals.
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Affiliation(s)
- Amor Hedfi
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Manel Ben Ali
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Ahmed Noureldeen
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Mohammed Almalki
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Roquia Rizk
- Research Centre for Biochemical, Environmental and Chemical Engineering, Sustainability Solutions Research Lab, University of Pannonia, Egyetem str. 10, 8200, Veszprém, Hungary
- Biochemisrty Department, Faculty of Agriculture, Cairo University, Giza, Egypt
| | - Ezzeddine Mahmoudi
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Gabriel Plăvan
- Faculty of Biology, Alexandru Ioan Cuza University of Iasi, Iasi, Romania
| | - Octavian Pacioglu
- National Institute of Research and Development for Biological Sciences, Bucharest, Romania
| | - Fehmi Boufahja
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia.
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16
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Allouche M, Nasri A, Harrath AH, Mansour L, Alwasel S, Beyrem H, Plăvan G, Rohal-Lupher M, Boufahja F. Meiobenthic nematode Oncholaimus campylocercoides as a model in laboratory studies: selection, culture, and fluorescence microscopy after exposure to phenanthrene and chrysene. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:29484-29497. [PMID: 33560507 DOI: 10.1007/s11356-021-12688-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 01/25/2021] [Indexed: 06/12/2023]
Abstract
Numerous studies have focused on the response of meiofauna after exposure to polycyclic aromatic hydrocarbons (PAHs), but none has been devoted to their uptake into nematode body compartments. The present study monitored PAH uptake by Oncholaimus campylocercoides which was selected after 40 days in the laboratory through original protocols from natural sediments collected in the Old Harbor of Bizerte, Tunisia. To achieve the mono-species level, a grain size magnification was applied by gradually adding a biosubstrate made from either the crushed shells of Mytilus galloprovincialis or minced leaves of Posidonia oceanica. After selection, O. campylocercoides was cultured and fed with earthworm powder (560 mg.l-1). Thereafter, it was exposed for 3 weeks to phenanthrene and chrysene (38, 116, and 348 ppb). Fluorescence microscopy revealed higher intensities of PAHs at the spicules, mouths, and pharynges compared with the other organs considered. Moreover, the buccal fluorescence showed a significant correlation with that measured in the biosubstrate made with shells of M. galloprovincialis.
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Affiliation(s)
- Mohamed Allouche
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Ahmed Nasri
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Abdel Halim Harrath
- Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Lamjed Mansour
- Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Saleh Alwasel
- Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Hamouda Beyrem
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Gabriel Plăvan
- Faculty of Biology, Alexandru Ioan Cuza University of Iasi, Iasi, Romania
| | - Melissa Rohal-Lupher
- Texas Water Development Board, 1700 North Congress Avenue, Austin, TX, 78701, USA
| | - Fehmi Boufahja
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia.
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17
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Hedfi A, Ben Ali M, Hassan MM, Albogami B, Al-Zahrani SS, Mahmoudi E, Karachle PK, Rohal-Lupher M, Boufahja F. Nematode traits after separate and simultaneous exposure to Polycyclic Aromatic Hydrocarbons (anthracene, pyrene and benzo[a]pyrene) in closed and open microcosms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 276:116759. [PMID: 33639491 DOI: 10.1016/j.envpol.2021.116759] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 01/11/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
The majority of experimental studies carried out to date, regarding the effects of pollutants on meiofauna have been conducted by means of closed systems, and rarely using open ones. The current work explored the impact of three Polycyclic Aromatic Hydrocarbons (PAHs), anthracene, pyrene and benzo[a]pyrene, applied alone or combined, on meiobenthic nematodes using both systems. The results revealed that single PAHs impacted the nematofauna similarly in closed or open systems with a higher toxicity observed for benzo[a]pyrene. However, the closed microcosms contaminated with PAHs became organically enriched, resulting in more non-selective deposit feeders and omnivores-carnivores. Taxonomic and functional effects related to combinations of PAHs were close to those of individual treatments in closed systems, however, for open ones, the outcomes were different. The caudal morphology influenced the response of taxa during their avoidance/endurance of hydrocarbons in open systems where the effects of PAHs mixtures appeared not only additive but also synergetic. Based on the results of the study, the use of open systems is preferred to closed ones as the research outcomes were more accurate and representing better conditions prevailing in nature.
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Affiliation(s)
- Amor Hedfi
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia; University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia.
| | - Manel Ben Ali
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia; University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia.
| | - Montaser M Hassan
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia; Zoology Department, Faculty of Science, Ain Shams University, 11566, Cairo, Egypt.
| | - Bander Albogami
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
| | - Samia S Al-Zahrani
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
| | - Ezzeddine Mahmoudi
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia.
| | - Paraskevi K Karachle
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, 46.7 Athens-Sounio Ave., P.O. Box 712, 19013, Anavyssos, Attika, Greece.
| | - Melissa Rohal-Lupher
- Texas Water Development Board, 1700 North Congress Avenue, Austin, TX, 78701, USA.
| | - Fehmi Boufahja
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia.
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18
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First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana. FORESTS 2021. [DOI: 10.3390/f12030338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bioindicators assess the mangroves ecological state according to the types of pressures but they differ with the ecosystem’s specificities. We investigated benthic meiofauna diversity and structure within the low human-impacted mangroves in French Guiana (South America) in response to sediment variables with various distances to the main city. Contaminant’s concentrations differed among the stations, but they remained below toxicity guidelines. Meiofauna structure (Foraminifera, Kinorhyncha, Nematoda) however varied accordingly. Nematode’s identification brought details on the sediment’s quality. The opportunistic genus Paraethmolaimus (Jensen, 1994) strongly correlated to the higher concentrations of Hg, Pb. Anoxic sediments were marked by organic enrichment in pesticides, PCB, and mangrove litter products and dominance of two tolerant genus, Terschellingia (de Man, 1888) and Spirinia (Gerlach, 1963). In each of these two stations, we found many Desmodora individuals (de Man, 1889) with the presence of epibionts highlighting the nematodes decreased fitness and defenses. Oxic sediments without contaminants were distinguished by the sensitive genera Pseudocella (Filipjev, 1927) and a higher diversity of trophic groups. Our results suggested a nematodes sensitivity to low contaminants concentrations. Further investigations at different spatio-temporal scales and levels of deterioration, would be necessary to use of this group as bioindicator of the mangroves’ ecological status.
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19
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Allouche M, Nasri A, Harrath AH, Mansour L, Beyrem H, Boufahja F. Experimental selection of Marylynnia puncticaudata (Cyatholaimidae, Nematoda) and effects of organic enrichment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:6866-6876. [PMID: 33010015 DOI: 10.1007/s11356-020-11050-1] [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: 11/27/2019] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
Meiobenthic nematodes are well-known bioindicators in aquatic ecosystem health programs. However, the explored taxa are still limited and practically devoted to the community level. The present study provided a new method of experimental isolation of a species from a pristine nematofauna. In our method, the nematofauna faced two types of sediment, namely, the leaves of Posidonia oceanica and shells of Mytilus galloprovincialis, under controlled laboratory conditions, and several changes in species composition occurred through gradual selection of the most adaptable nematode taxa to the new environments, which were previously defaunated. We used the selected nematode taxon, Marylynnia puncticaudata (Cyatholaimidae), to examine the possible effects of organic enrichment, and the results clearly showed that the body size of the nematodes significantly increased and they became fat when after enrichment using a powder made of marine agar (1200 mg l-1) and cuticles of Crangon crangon (900 mg l-1), but their relative body growth showed no discernible changes.
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Affiliation(s)
- Mohamed Allouche
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Ahmed Nasri
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Abdel Halim Harrath
- Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Lamjed Mansour
- Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Hamouda Beyrem
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Fehmi Boufahja
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia.
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Vieira DC, Gallucci F, Corte GN, Checon HH, Zacagnini Amaral AC, Fonseca G. The relative contribution of non-selection and selection processes in marine benthic assemblages. MARINE ENVIRONMENTAL RESEARCH 2021; 163:105223. [PMID: 33302155 DOI: 10.1016/j.marenvres.2020.105223] [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: 06/24/2020] [Revised: 11/15/2020] [Accepted: 11/28/2020] [Indexed: 06/12/2023]
Abstract
We tested the hypothesis that the ubiquity of marine meiofaunal nematodes and their indiscriminate passive dispersal create assemblages that are less limited by its environment; whereas the relatively smaller population sizes of macrofauna, associated with their ability to track environmental conditions before settlement, renders their distribution more environmentally-restricted. We compared the empirical distribution of macrofauna and nematode species with that of communities simulated under different assumptions of selection (e.g. environmental filtering) and non-selection (e.g. dispersal limitation) processes. Selection processes were the prime driver of both meio- and macrofauna assemblages, with rare species strongly contributing to this component. The total number of species explained by non-selection processes was 27% higher in nematodes than in macrofauna. Our results underline the importance of a species-level approach to determine the contribution of selection and non-selection assembly processes. Moreover, they highlight the important yet overlooked role of dispersal and stochastic processes in determining species dynamics.
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Affiliation(s)
- Danilo Cândido Vieira
- Centro de Estudos Do Mar - Universidade Federal Do Paraná - Caixa Postal 50.002, 83255-000, Pontal Do Paraná, PR, Brazil; Universidade Federal de São Paulo, Av. Dona Ana Costa, 95 - CEP, 11060-001, Santos, SP, Brazil.
| | - Fabiane Gallucci
- Universidade Federal de São Paulo, Av. Dona Ana Costa, 95 - CEP, 11060-001, Santos, SP, Brazil
| | - Guilherme Nascimento Corte
- Instituto Oceanográfico, Universidade de São Paulo, Praça Do Oceanográfico, 191, São Paulo, SP - CEP, 05508-120, Brazil; Instituto de Biologia, Universidade Estadual de Campinas - Cidade Universitária "Zeferino Vaz", CEP, 13083-970, Campinas, SP, Brazil; Escola Do Mar, Ciência e Tecnologia, Universidade Do Vale Do Itajaí - Rua Uruguai, 458 - CEP 88, 302-202, Itajaí, SC, Brazil
| | - Helio Herminio Checon
- Instituto Oceanográfico, Universidade de São Paulo, Praça Do Oceanográfico, 191, São Paulo, SP - CEP, 05508-120, Brazil; Instituto de Biologia, Universidade Estadual de Campinas - Cidade Universitária "Zeferino Vaz", CEP, 13083-970, Campinas, SP, Brazil
| | - Antônia Cecília Zacagnini Amaral
- Instituto de Biologia, Universidade Estadual de Campinas - Cidade Universitária "Zeferino Vaz", CEP, 13083-970, Campinas, SP, Brazil
| | - Gustavo Fonseca
- Universidade Federal de São Paulo, Av. Dona Ana Costa, 95 - CEP, 11060-001, Santos, SP, Brazil
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Essid N, Gharbi R, Harrath AH, Mansour L, Mahmoudi E, Beyrem H, Ansari KGMT, Boufahja F. Toxicity of a chromium-enriched superfood, Spirulina platensis, assessed by taxonomic and morpho-functional diversity of marine meiofauna. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 262:114350. [PMID: 32197121 DOI: 10.1016/j.envpol.2020.114350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 02/21/2020] [Accepted: 03/06/2020] [Indexed: 06/10/2023]
Abstract
A laboratory bioassay was conducted to investigate the ecotoxicity of a chromium-enriched superfood, Spirulina platensis, on the meiofauna collected from the Ghar El Melh lagoon, Tunisia. After 1 month of exposure, the abundances of meiobenthic taxa and the taxonomic and morpho-functional diversity of nematodes showed significant differences between the Spirulina and Spirulina + chromium groups. The nematodes were more tolerant of all types of stressors compared to harpacticoids, polychaetes, and oligochaetes, and the lowest taxonomic and morpho-functional diversity of nematodes was observed in the highest sedimentary concentration of S. platensis (50% DW). The mixed treatments may have been richer in micro-habitats and subject to low selective pressure, thereby hosting nematodes with a wide range of adaptations. The responses of the nematode species differed depending on their functional traits. Spirulina enriched with chromium induced two responses for the same feeding group: high toxicity for Daptonema fallax and low toxicity for two Theristus species (T. flevensis and T. modicus). The ecotoxicity of the Spirulina/chromium mixtures were lower than that of Spirulina alone, suggesting mutual neutralization between these two elements. The association between functional traits and taxonomic diversity showed that the effects of the mixtures were not additive and that one of the stressors camouflaged the effect of the other. Our findings should encourage the commercialization of chromium-enriched S. platensis owing to its lower ecotoxicity than Spirulina alone.
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Affiliation(s)
- Naceur Essid
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Rifka Gharbi
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Abdel Halim Harrath
- King Saud University, Zoology Department, College of Science, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Lamjed Mansour
- King Saud University, Zoology Department, College of Science, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ezzeddine Mahmoudi
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Hamouda Beyrem
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | | | - Fehmi Boufahja
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia.
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Ferraz MA, Choueri RB, Castro ÍB, Simon da Silva C, Gallucci F. Influence of sediment organic carbon on toxicity depends on organism's trophic ecology. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114134. [PMID: 32062462 DOI: 10.1016/j.envpol.2020.114134] [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: 08/07/2019] [Revised: 01/09/2020] [Accepted: 02/04/2020] [Indexed: 06/10/2023]
Abstract
Studies which showed the influence of organic carbon on the toxicity of sediment-associated contaminants on benthic invertebrates suggest this was primarily due to its influence on the interstitial water concentrations of the contaminant. A higher organic content offers more binding sites for organic contaminants, which means lower toxicity for organisms whose exposure route is mainly through contaminated interstitial water. However, a higher organic content in the sediment could mean a higher toxicity for deposit-feeding organisms, which can assimilate the contaminant by ingestion of contaminated particles. To investigate the influence of sedimentary organic carbon content on the toxicity of an organic contaminant on a benthic community, a microcosm experiment was carried out where natural nematode assemblages were exposed to three concentrations of Irgarol in sediments with two different levels of organic carbon for 7 and 35 days. The response of the nematode assemblage to sediment contamination by Irgarol differed between organically "Lower organic carbon" and "Higher organic carbon" sediments. Responses were genus specific and although community composition was the same in both sediments in the beginning of the assay, contamination by Irgarol affected different genera at each sediment type. Also, the differential amount of organic carbon promoted responses of different functional groups. In Lower organic carbon sediments, contaminated treatments showed lower abundances of the genus Viscosia and the group of predacious nematodes, which were probably affected by an increased availability of Irgarol in the interstitial water in this treatment. In Higher organic carbon sediments, the group of deposit-feeders were mainly affected, suggesting the ingestion of contaminated food as the main route of contamination in this condition. These results indicate that the bioavailability of toxic substances in sediments is not only determined by their partitioning between the different phases of the sediment but also by the organism's trophic ecology.
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Affiliation(s)
- Mariana Aliceda Ferraz
- Centro de Estudos do Mar, Universidade Federal do Paraná, Caixa Postal 61, 83255-976, Pontal do Paraná, PR, Brazil.
| | - Rodrigo Brasil Choueri
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
| | - Ítalo Braga Castro
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
| | - Cecília Simon da Silva
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
| | - Fabiane Gallucci
- Centro de Estudos do Mar, Universidade Federal do Paraná, Caixa Postal 61, 83255-976, Pontal do Paraná, PR, Brazil; Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
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Allouche M, Hamdi I, Nasri A, Harrath AH, Mansour L, Beyrem H, Boufahja F. Laboratory bioassay exploring the effects of anti-aging skincare products on free-living marine nematodes: a case study of collagen. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:11403-11412. [PMID: 31965497 DOI: 10.1007/s11356-020-07655-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
Organic enrichment due to human impact is one of the major threats that affect benthic communities in semi-enclosed marine ecosystems, such as the Mediterranean Sea. However, many emerging sources of organic pollutants, such as those released to nature through human practices related to esthetics and cosmetics, remain underestimated, despite being an increasingly important source of organic matter input following a decade of expansion by the cosmetic industry. Therefore, an experiment was designed to explore the influence of collagen, the main component of commercialized skin anti-aging products, on a Mediterranean community of free-living marine nematodes from a beach in Rimel, northeast Tunisia. The effects of exposure for 30 days to a control treatment and three test treatments, corresponding to three levels of sedimentary enrichment with collagen (3, 6, and 12 ppm dry weight (DW)), were examined using a microcosm approach. Reductions in abundance and diversity were noted with an increase in collagen enrichment, together with a slight increase in individual weight. The presence of three species characteristic of control microcosms, Ptycholaimellus ponticus, Theristus modicus, and Kraspedonema reflectans, was clearly affected at the lowest dose; these were therefore classified as "collagen-sensitive." In contrast, the numbers of "collagen-tolerant" species, including Sigmophoranema rufum, Lauratonema hospitum, Enoploides spiculohamatus, and Trichotheristus mirabilis, increased significantly in the treated microcosms.
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Affiliation(s)
- Mohamed Allouche
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Ilhem Hamdi
- Faculty of Sciences of Tunis, Laboratory of Ecology, Parasitology and Biology of Aquatic Organisms, University of Tunis El Manar, Tunis, Tunisia
| | - Ahmed Nasri
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Abdel Halim Harrath
- Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Lamjed Mansour
- Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Hamouda Beyrem
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Fehmi Boufahja
- Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia.
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24
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Hong JH, Semprucci F, Jeong R, Kim K, Lee S, Jeon D, Yoo H, Kim J, Kim J, Yeom J, Lee S, Lee K, Lee W. Meiobenthic nematodes in the assessment of the relative impact of human activities on coastal marine ecosystem. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:81. [PMID: 31897611 DOI: 10.1007/s10661-019-8055-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 12/25/2019] [Indexed: 06/10/2023]
Abstract
Ecological quality (EcoQ) status of the Southwest and West coasts of South Korea was evaluated within the "National Investigation of Marine Ecosystems in Korea" in the 2015. In particular, the study dealt to assess the ecological quality of the sediments using free-living nematode communities. A total of 149 species were found in the study area, and Daptonema, Sabatieria, Parodontophora, Sphaerolaimus, and Viscosia were found as dominant genera. Statistical analysis of both environmental and faunal parameters showed an increasing human pressure from Western to Southern coasts. The community structure changed with the environmental features of the study area and allowed the detection of a suite of possible nematode indicators that might be used in monitoring studies. In particular, Dorylaimopsis spp. appeared heavy metal and organic matter resistant taxa, Sabatieria an eutrophication resistant genus, while Paracanthonchus and Neotonchus as heavy metal and organic matter sensitive genera. The principal component analysis (PCA) results showed a clear negative correlation between maturity index and both heavy metal and organic matter increasing, while diversity indices did not appear to be significantly influenced by them. Appling the thresholds of the synthetic nematode indices, the EcoQ of the study area was assessed as poor to moderate.
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Affiliation(s)
- Jung-Ho Hong
- Biodiversity Research Institute, Marine Act co., Seoul, South Korea
| | - Federica Semprucci
- Department of Biomolecular Sciences (DiSB), Urbino University, Urbino, Italy.
| | - Raehyuk Jeong
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
| | - Kichoon Kim
- Biodiversity Research Institute, Marine Act co., Seoul, South Korea
| | - Seunghan Lee
- Biodiversity Research Institute, Marine Act co., Seoul, South Korea
| | - Donggu Jeon
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
| | - Hyunsu Yoo
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
| | - Jungho Kim
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
| | - Jaehyun Kim
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
| | - Jisu Yeom
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
| | - Somin Lee
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
| | - Kanghyun Lee
- Biodiversity Research Institute, Marine Act co., Seoul, South Korea
| | - Wonchoel Lee
- Laboratory of Biodiversity, Department of Life Science, Hanyang University, Seoul, South Korea
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25
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Bertocci I, Dell'Anno A, Musco L, Gambi C, Saggiomo V, Cannavacciuolo M, Lo Martire M, Passarelli A, Zazo G, Danovaro R. Multiple human pressures in coastal habitats: variation of meiofaunal assemblages associated with sewage discharge in a post-industrial area. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 655:1218-1231. [PMID: 30577114 DOI: 10.1016/j.scitotenv.2018.11.121] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 10/29/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
Marine ecosystems are globally threatened by human activities, but some areas, such as those affected by abandoned industrial plants, show an overlap of acute and chronic impacts, which determine a considerable deterioration of their health status. Here we report the results of a research conducted on coastal sewers that discharge their loads in the highly contaminated area of Bagnoli-Coroglio (Tyrrhenian Sea, Western Mediterranean). The sampling area is characterized by heavy industrial activities (a steel plant using coal, iron and limestone) started in 1905 and ceased in 1990, which left widespread heavy metals and hydrocarbon contamination. After taking into account the potential influence of sediment grain size ranges through their inclusion as covariates in the analysis, we tested the potential impact of sewage discharge on the total abundance and multivariate structure of meiofaunal assemblages, as well as on the abundance of single taxa. The organic matter was analysed in terms of total phytopigment and biopolymeric carbon concentrations. Nematoda, Copepoda (including their nauplii), and Tardigrada were the most abundant meiofaunal taxa at all sites, but nematodes did not show a consistent pattern relative to the sewage outfalls. However, the sewer located in the historically most contaminated area showed a minimal abundance of all taxa, including nematodes, while copepods were relatively less abundant at the two southernmost sewers. Comparing the north vs. south site of the sewers, higher meiofaunal abundances were observed in the southward part, likely as a result of the local circulation. The results of this study indicate the general adaptation of meiofauna to multiple stressors (sewage discharge, superimposed to chronic industrial contamination) and its likely modulation by other local processes. They also provide relevant baseline information for future restoration interventions that would take into account the spatial variation of target organisms as needed.
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Affiliation(s)
- I Bertocci
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy.
| | - A Dell'Anno
- Polytechnic University of Marche, Department of Life and Environmental Sciences, 60131 Ancona, Italy
| | - L Musco
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - C Gambi
- Polytechnic University of Marche, Department of Life and Environmental Sciences, 60131 Ancona, Italy
| | - V Saggiomo
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - M Cannavacciuolo
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - M Lo Martire
- Polytechnic University of Marche, Department of Life and Environmental Sciences, 60131 Ancona, Italy
| | - A Passarelli
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - G Zazo
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy
| | - R Danovaro
- Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy; Polytechnic University of Marche, Department of Life and Environmental Sciences, 60131 Ancona, Italy
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26
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Urbina MA. Temporal variation on environmental variables and pollution indicators in marine sediments under sea Salmon farming cages in protected and exposed zones in the Chilean inland Southern Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 573:841-853. [PMID: 27595942 DOI: 10.1016/j.scitotenv.2016.08.166] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 08/22/2016] [Accepted: 08/22/2016] [Indexed: 06/06/2023]
Abstract
The impacts of any activity on marine ecosystems will depend on the characteristics of the receptor medium and its resilience to external pressures. Salmon farming industry develops along a constant gradient of hydrodynamic conditions in the south of Chile. However, the influence of the hydrodynamic characteristics (weak or strong) on the impacts of intensive salmon farming is still poorly understood. This one year study evaluates the impacts of salmon farming on the marine sediments of both protected and exposed marine zones differing in their hydrodynamic characteristics. Six physico-chemical, five biological variables and seven indexes of marine sediments status were evaluated under the salmon farming cages and control sites. Our results identified a few key variables and indexes necessary to accurately evaluate the salmon farming impacts on both protected and exposed zones. Interestingly, the ranking of importance of the variables and the temporality of the observed changes, varied depending on the hydrodynamic characteristics. Biological variables (nematodes abundance) and environmental indexes (Simpson's dominance, Shannon's diversity and Pielou evenness) are the first to reflect detrimental impacts under the salmon farming cages. Then the physico-chemical variables such as redox, sulphurs and phosphorus in both zones also show detrimental impacts. Based on the present results we propose that the hydrodynamic regime is an important driver of the magnitude and temporality of the effects of salmon farming on marine sediments. The variables and indexes that best reflect the effects of salmon farming, in both protected and exposed zones, are also described.
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Affiliation(s)
- Mauricio A Urbina
- Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile.
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27
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Aoyagi T, Kimura M, Yamada N, Navarro RR, Itoh H, Ogata A, Sakoda A, Katayama Y, Takasaki M, Hori T. Dynamic transition of chemolithotrophic sulfur-oxidizing bacteria in response to amendment with nitrate in deposited marine sediments. Front Microbiol 2015; 6:426. [PMID: 26042094 PMCID: PMC4435421 DOI: 10.3389/fmicb.2015.00426] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 04/22/2015] [Indexed: 11/17/2022] Open
Abstract
Although environmental stimuli are known to affect the structure and function of microbial communities, their impact on the metabolic network of microorganisms has not been well investigated. Here, geochemical analyses, high-throughput sequencing of 16S rRNA genes and transcripts, and isolation of potentially relevant bacteria were carried out to elucidate the anaerobic respiration processes stimulated by nitrate (20 mM) amendment of marine sediments. Marine sediments deposited by the Great East Japan Earthquake in 2011 were incubated anaerobically in the dark at 25∘C for 5 days. Nitrate in slurry water decreased gradually for 2 days, then more rapidly until its complete depletion at day 5; production of N2O followed the same pattern. From day 2 to 5, the sulfate concentration significantly increased and the sulfur content in solid-phase sediments significantly decreased. These results indicated that denitrification and sulfur oxidation occurred simultaneously. Illumina sequencing revealed the proliferation of known sulfur oxidizers, i.e., Sulfurimonas sp. and Chromatiales bacteria, which accounted for approximately 43.5% and 14.8% of the total population at day 5, respectively. These oxidizers also expressed 16S rRNA to a considerable extent, whereas the other microorganisms, e.g., iron(III) reducers and methanogens, became metabolically active at the end of the incubation. Extinction dilution culture in a basal-salts medium supplemented with sulfur compounds and nitrate successfully isolated the predominant sulfur oxidizers: Sulfurimonas sp. strain HDS01 and Thioalkalispira sp. strain HDS22. Their 16S rRNA genes showed 95.2–96.7% sequence similarity to the closest cultured relatives and they grew chemolithotrophically on nitrate and sulfur. Novel sulfur-oxidizing bacteria were thus directly involved in carbon fixation under nitrate-reducing conditions, activating anaerobic respiration processes and the reorganization of microbial communities in the deposited marine sediments.
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Affiliation(s)
- Tomo Aoyagi
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
| | - Makoto Kimura
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
| | - Namiha Yamada
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
| | - Ronald R Navarro
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
| | - Hideomi Itoh
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology Sapporo, Japan
| | - Atsushi Ogata
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
| | - Akiyoshi Sakoda
- Institute of Industrial Science, The University of Tokyo Tokyo, Japan
| | - Yoko Katayama
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology Tokyo, Japan
| | - Mitsuru Takasaki
- Department of Food and Environmental Sciences, Faculty of Science and Engineering, Ishinomaki Senshu University Ishinomaki, Japan
| | - Tomoyuki Hori
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
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28
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Semprucci F, Frontalini F, Sbrocca C, du Châtelet EA, Bout-Roumazeilles V, Coccioni R, Balsamo M. Meiobenthos and free-living nematodes as tools for biomonitoring environments affected by riverine impact. ENVIRONMENTAL MONITORING AND ASSESSMENT 2015; 187:251. [PMID: 25877645 DOI: 10.1007/s10661-015-4493-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Accepted: 04/01/2015] [Indexed: 06/04/2023]
Abstract
The effects of the human impact on the coastal environments and relative biota can be different and even greater than those derived by natural fluctuations. The major disturbance causes in the coastal systems are rivers that may be important sources of nutrients and pollutants, particularly in a semi-closed basin such as the Adriatic Sea. In this context, we investigated the distribution of both meiobenthic and nematode assemblages in the Central Adriatic Sea to evaluate whether and how they are influenced by riverine discharges and which faunal descriptors are the most effective in detecting this type of stress. On the basis of our results, the disturbance effects in the studied area might be caused by both local streams and Po plume, and even if the latter might be considered of lesser extent, it is worthy to note its real impact at a short distance from the coastline. Meiobenthic assemblage structure appears as a good tool for detecting short-term responses of the benthic domain, whereas nematode assemblages seem more useful for defining long-term responses. Accordingly, the former highlighted from poor to sufficient ecological quality status (EQS) of this area, whereas the latter from moderate to bad EQS. Life strategy traits prove to be the most informative faunal descriptor due to their high correspondence with the environmental variables and particularly with this type of disturbance.
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Affiliation(s)
- F Semprucci
- Dipartimento di Scienze della Terra, della Vita e dell'Ambiente (DiSTeVA), Università degli Studi di Urbino 'Carlo Bo', Campus Scientifico loc. Crocicchia, 61029, Urbino, Italy,
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29
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Ferreira RC, Nascimento-Junior AB, Santos PJP, Botter-Carvalho ML, Pinto TK. Responses of estuarine nematodes to an increase in nutrient supply: an in situ continuous addition experiment. MARINE POLLUTION BULLETIN 2015; 90:115-120. [PMID: 25499965 DOI: 10.1016/j.marpolbul.2014.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/07/2014] [Accepted: 11/11/2014] [Indexed: 06/04/2023]
Abstract
An experiment was carried out on an estuarine mudflat to assess impacts of inorganic nutrients used to fertilize sugar-cane fields on the surrounding aquatic ecosystem, through changes in the nematode community structure. During 118 days, nine quadrats each 4m(2) were sampled six times after the beginning of fertilizer addition. The fertilizer was introduced weekly in six areas, at two different concentrations (low and high doses), and three areas were used as control. The introduction of nutrients modified key nematode community descriptors. In general, the nematodes were negatively affected over the study period. However, Comesa, Metachromadora, Metalinhomoeus, Spirinia and Terschellingia were considered tolerant, and other genera showed different degrees of sensitivity. Nutrient input also affect the availability and quality of food, changing the nematode trophic structure. The use of inorganic fertilizer should be evaluated with care because of the potential for damage to biological communities of coastal aquatic systems.
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Affiliation(s)
- R C Ferreira
- Programa de Pós-graduação em Diversidade Biológica e Conservação nos Trópicos, UFAL, Maceió, AL, Brazil
| | | | - P J P Santos
- Programa de Pós-Graduação em Biologia Animal, UFPE, Recife, PE, Brazil; Departamento de Zoologia, UFPE, Recife, PE, Brazil
| | - M L Botter-Carvalho
- Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, 52171-900 Recife, PE, Brazil
| | - T K Pinto
- Programa de Pós-graduação em Diversidade Biológica e Conservação nos Trópicos, UFAL, Maceió, AL, Brazil; Unidade de Ensino Penedo/Campus Arapiraca, UFAL, Penedo, AL, Brazil.
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Daudi LN, Lugomela C, Uku JN, De Troch M. Effect of nutrient enrichment on seagrass associated meiofauna in Tanzania. MARINE ENVIRONMENTAL RESEARCH 2012; 82:49-58. [PMID: 23072915 DOI: 10.1016/j.marenvres.2012.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 09/10/2012] [Accepted: 09/19/2012] [Indexed: 06/01/2023]
Abstract
Abundance, diversity and community structure of meiofauna, with special emphasis on epiphytic harpacticoid copepods, occurring in Tanzanian seagrass beds under various nutrient inputs was determined. All measured parameters for epiphytic meiofauna and diatoms (fucoxanthin) were negatively affected by nutrient input and this was detected even at the higher taxonomic levels of meiofauna, supporting the validity of higher taxon surrogacy in environmental impact studies. However, benthic meiofauna and other biofilm characteristics (chlorophyll a) did not show any difference between sites suggesting that nutrient enrichment had less impact on these variables. This indicates a differential impact of pollution on epiphytic vs. benthic communities. Consequently, different trophic levels will be impacted in various ways and hence the effects of pollution on the overall ecosystem functioning of seagrass beds are complex and not straightforward. Although the seagrass plants themselves don't show any major changes under different nutrient input, associated organisms that guarantee energy flow at basal levels of the food web in this ecosystem can be largely impacted.
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