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Microplastic pollution from pellet spillage: Analysis of the Toconao ship accident along the Spanish and Portuguese coasts Texte intégral
2024
Cocozza, P. | Scarrica, V.M. | Rizzo, A. | Serranti, S. | Staiano, A. | Bonifazi, G. | Anfuso Melfi, Giorgio | Ciencias de la Tierra
In December 2023, 25 tons of pellets were lost by the Toconao ship in the Northwest Atlantic Ocean in front of the Portuguese coast. In this work, a coastal stretch of 633 km in Asturias and Galicia (Spain) and Northern Portugal was investigated to assess pellets’ concentration on 31 beaches. Field surveys were carried out in March 2024 and focused on sampling plastic pellets deposited along the shoreline. All the 7263 sampled pellets were characterized by size, degradation level, and color, while one subset was characterized by weight (40 % of the total) and another subset by polymer type (15 % of the total) using FT-IR spectroscopy. The results reveal that 94 % of the surveyed sites containing pellets, whereas the concentration values vary significantly among beaches, ranging from 0 to 40.3 pellets/kgdw. By combining the accounted variables, it emerges that 48.0 % of the collected pellets can be linked to the Toconao spill.
Afficher plus [+] Moins [-]A seawater field study of crude and fuel oil depletion in Northern Norway at two different seasons – Chemistry and bacterial communities | A seawater field study of crude and fuel oil depletion in Northern Norway at two different seasons – Chemistry and bacterial communities Texte intégral
2024
Langeloh, Hendrik Hinrich | Hakvåg, Sigrid | Øverjordet, Ida Beathe | Bakke, Ingrid | Sørensen, Lisbet | Brakstad, Odd Gunnar
After marine oil spills, natural processes like photooxidation and biodegradation can remove the oil from the environment. However, these processes are strongly influenced by environmental conditions. To achieve a greater understanding of how seasonal variations in temperature, light exposure and the bacterial community affect oil depletion in the marine environment, we performed two field experiments during the spring and autumn. Field systems equipped with a thin oil film of Statfjord, Grane or ULSFO were deployed in northern Norway. Depletion of the total extractable matter was faster during the spring than during the autumn. Statfjord showed faster depletion of n-alkanes during spring, while depletion of polycyclic aromatic hydrocarbons varied between the seasons based on the degree of alkyl-substitutions. ULSFO displayed the overall slowest depletion. Biodegradation of the oils was associated with high abundances of unassigned bacteria during the spring but was governed by Alcanivorax, Cycloclasticus, Oleibacter and Oleispira during the autumn. | publishedVersion
Afficher plus [+] Moins [-]Stereo-selective cardiac toxicity induced by metconazole via oxidative stress and the wnt/β-catenin signaling pathway in zebrafish embryos Texte intégral
2024
Liu, Lulu | Wang, Fengzhong | Zhang, Zhong | Fan, Bei | Luo, Ying | Li, Lin | Zhang, Yifan | Yan, Zhihui | Kong, Zhiqiang | Francis, Frédéric | Li, Minmin
peer reviewed | Metconazole (MEZ), a chiral triazole fungicide, produces enantioselective adverse effects in non-target organisms. Among MEZ's isomers, cis-MEZ displays robust antimicrobial properties. Evaluating MEZ and cis-MEZ's toxicity may mitigate fungicide usage and safeguard non-target organisms. Our study evaluated the toxicity of MEZ and its cis-isomers at concentrations of 0.02, 0.2, 2, and 4 mg L−1. We report stereoselectivity and severe cardiovascular defects in zebrafish, including pericardial oedema, decreased heart rate, increased sinus venous and bulbous arteries distances, intersegmental vessel defects, and altered cardiovascular development genes (hand2, gata4, nkx2.5, tbx5, vmhc, amhc, dll4, vegfaa, and vegfc). Further, MEZ significantly increased oxidative stress and apoptosis in zebrafish, primarily in the cardiac region. Isoquercetin, an antioxidant found in plants, partially mitigates MEZ-induced cardiac defects. Furthermore, MEZ upregulated the Wnt/β-catenin pathway genes (wnt3, β-catenin, axin2, and gsk-3β) and β-catenin protein expression. Inhibitor of Wnt Response-1 (IWR-1) rescued MEZ-induced cardiotoxicity. Our findings highlight oxidative stress, altered cardiovascular development genes, and upregulated Wnt/β-catenin signaling as contributors to cardiovascular toxicity in response to MEZ and cis-MEZ treatments. Importantly, 1R,5S-MEZ exhibited greater cardiotoxicity than 1S,5R-MEZ. Thus, our study provides a comprehensive understanding of cis-MEZ's cardiovascular toxicity in aquatic life. © 2024 Elsevier Ltd
Afficher plus [+] Moins [-]Floating microplastics in Svalbard fjords: High spatial variability requires methodological consistency in estuarine systems Texte intégral
2024
Pakhomova, Svetlana | Berezina, Anfisa | Zhdanov, Igor | Mekhova, Olga | Ilinskaya, Alisa | Golyakov, Alexey | Polivanova, Tatiana | Gebruk, Anna | Lusher, Amy Lorraine | Yakushev, Evgeniy
Microplastic pollution was studied in surface waters of Isfjorden, Svalbard in July 2021 as a part of an international regional harmonisation exercise. Surface microplastics (0.5–5 mm) were sampled with a neuston net in triplicate per study site in several branches of Isfjorden, covering populated and unpopulated fjords. High spatial variability of microplastic abundance (0–32,700 items/km2) was observed within a single fjord resulting from the hydrodynamic pattern formed through the interaction of surface currents, freshwater runoff, and wind conditions. Maximum microplastic abundance was not correlated with the distance from the local source and was instead defined by local small-scale hydrodynamics. Future recommendations for correct assessment of surface microplastics concentration in estuarine environments are presented. | publishedVersion
Afficher plus [+] Moins [-]Lagrangian modelling of oil concentrations at sea: a sensitivity analysis to the grid resolution and number of Lagrangian elements Texte intégral
2024
Martínez Gómez, Andrés | Abascal Santillana, Ana Julia | García Gómez, Andrés | Aragón Caminero, Germán | Medina Santamaría, Raúl | Universidad de Cantabria
This paper presents a novel method to select the optimal combination of grid resolution and number of Lagrangian elements (LEs) required in numerical modelling of oil concentrations at sea. A sensitivity analysis in terms of grid resolution and the number of LEs, was carried out to understand the uncertainty that these userdependent parameters introduce in the numerical results. A dataset of 211,200 simulations performed under 400 metocean patterns, 6 initial volumes, 11 grid resolutions, and different numbers of LEs (100 to 500,000), was used to analyze the sensitivity of the model along different Thresholds of Concern. Results show the importance of a correct selection of the number of LEs and the grid resolution in Lagrangian modelling of surface oil concentrations. The method proposed will allow selecting the optimal combination of these parameters to find an optimal balance between the accuracy and the computational cost of the simulation. | This work was partly carried out in the framework of the project PID2020-117267RB-I00 (COIL) funded by MCIN/AEI/10.13039/501100011033// and the project PDC2021-120892-I00 (BLOWHAZARD) funded by MCIN/AEI/10.13039/501100011033 and by European Union Next GenerationEU/PRTR.
Afficher plus [+] Moins [-]Personal care products: an emerging threat to the marine bivalve Ruditapes philippinarum Texte intégral
2024
Pintado Herrera, Marina Guadalupe | Aguirre-Martínez, Gabriela V. | Martín Díaz, María Laura | Blasco, Julián | Lara Martín, Pablo Antonio | Sendra, Marta | Química Física
In the last few decades, there has been a growing interest in understanding the behavior of personal care products (PCPs) in the aquatic environment. In this regard, the aim of this study is to estimate the accumulation and effects of four PCPs within the clam Ruditapes philippinarum. The PCPs selected were triclosan, OTNE, benzophenone-3, and octocrylene. A progressive uptake was observed and maximum concentrations in tissues were reached at the end of the exposure phase, up to levels of 0.68 μg g− 1, 24 μg g− 1, 0.81 μg g− 1, and 1.52 μg g− 1 for OTNE, BP-3, OC, and TCS, respectively. After the PCP post-exposure period, the removal percentages were higher than 65%. The estimated logarithm bioconcentration factor ranged from 3.34 to 2.93, in concordance with the lipophobicity of each substance. No lethal effects were found although significant changes were observed for ethoxyresorufin O-demethylase activity, glutathione S-transferase activity, lipid peroxidation, and DNA damage.
Afficher plus [+] Moins [-]Life starts with plastic: High occurrence of plastic pieces in fledglings of northern fulmars | Life starts with plastic: High occurrence of plastic pieces in fledglings of northern fulmars Texte intégral
2024
Collard, France | Benjaminsen, Stine Charlotte | Herzke, Dorte | Husabø, Eirin | Sagerup, Kjetil | Tulatz, Felix | Gabrielsen, Geir W.
Life starts with plastic: High occurrence of plastic pieces in fledglings of northern fulmars | Life starts with plastic: High occurrence of plastic pieces in fledglings of northern fulmars Texte intégral
2024
Collard, France | Benjaminsen, Stine Charlotte | Herzke, Dorte | Husabø, Eirin | Sagerup, Kjetil | Tulatz, Felix | Gabrielsen, Geir W.
Plastic pollution threatens many organisms around the world. In particular, the northern fulmar, Fulmarus glacialis, is known to ingest high quantities of plastics. Since data are sparse in the Eurasian Arctic, we investigated plastic burdens in the stomachs of fulmar fledglings from Kongsfjorden, Svalbard. Fifteen birds were collected and only particles larger than 1 mm were extracted, characterised and analysed with Fourier Transform InfraRed spectroscopy. All birds ingested plastic. In total, 683 plastic particles were found, with an average of 46 ± 40 SD items per bird. The most common shape, colour and polymer were hard fragment, white, and polyethylene, respectively. Microplastics ( 5 mm). This study confirms high numbers of ingested plastics in fulmar fledglings from Svalbard and suggests that fulmar fledglings may be suitable for temporal monitoring of plastic pollution, avoiding potential biases caused by age composition or breeding state. | publishedVersion
Afficher plus [+] Moins [-]Life starts with plastic: High occurrence of plastic pieces in fledglings of northern fulmars Texte intégral
2024
Collard, France | Benjaminsen, Stine Charlotte | Herzke, Dorte | Husabø, Eirin | Sagerup, Kjetil | Tulatz, Felix | Gabrielsen, Geir W.
Plastic pollution threatens many organisms around the world. In particular, the northern fulmar, Fulmarus glacialis, is known to ingest high quantities of plastics. Since data are sparse in the Eurasian Arctic, we investigated plastic burdens in the stomachs of fulmar fledglings from Kongsfjorden, Svalbard. Fifteen birds were collected and only particles larger than 1 mm were extracted, characterised and analysed with Fourier Transform InfraRed spectroscopy. All birds ingested plastic. In total, 683 plastic particles were found, with an average of 46 ± 40 SD items per bird. The most common shape, colour and polymer were hard fragment, white, and polyethylene, respectively. Microplastics ( 5 mm). This study confirms high numbers of ingested plastics in fulmar fledglings from Svalbard and suggests that fulmar fledglings may be suitable for temporal monitoring of plastic pollution, avoiding potential biases caused by age composition or breeding state.
Afficher plus [+] Moins [-]Ghost fishing efficiency in swimming crab (Portunus trituberculatus) pot fishery | Ghost fishing efficiency in swimming crab (Portunus trituberculatus) pot fishery Texte intégral
2024
Yu, Mengjie | Herrmann, Bent | Cerbule, Kristine | Liu, Changdong | Dou, Yilin | Zhang, Liyou | Tang, Yanli
Ghost fishing efficiency in swimming crab (Portunus trituberculatus) pot fishery | Ghost fishing efficiency in swimming crab (Portunus trituberculatus) pot fishery Texte intégral
2024
Yu, Mengjie | Herrmann, Bent | Cerbule, Kristine | Liu, Changdong | Dou, Yilin | Zhang, Liyou | Tang, Yanli
Abandoned, lost, or otherwise discarded fishing gear (ALDFG) is a global challenge that negatively affects marine environment through plastic pollution and continued capture of marine animals, so-called “ghost fishing”. In different pot fisheries, ghost fishing related to ALDFG is of concern, including pot fishery targeting swimming crab (Portunus trituberculatus). This study quantified the ghost fishing efficiency by comparing it to the catch efficiency of actively fished pots of the commercial fishery. The results showed that the ghost fishing affects both target and bycatch species. On average, the ghost fishing pots captured 12.53 % (confidence intervals: 10.45 %–15.00 %) undersized crab and 15.70 % (confidence intervals: 12.08 %–20.74 %) legal-sized crab compared to the actively fished pots. Few individuals of several bycatch species were also captured by ghost fishing pots. The results of this study emphasized the need to develop new management strategies for reducing marine pollution by ALDFG and associated negative effects in this pot fishery. | publishedVersion
Afficher plus [+] Moins [-]Ghost fishing efficiency in swimming crab (Portunus trituberculatus) pot fishery Texte intégral
2024
Yu, Mengjie | Herrmann, Bent | Cerbule, Kristine | Liu, Changdong | Dou, Yilin | Zhang, Liyou | Tang, Yanli
Abandoned, lost, or otherwise discarded fishing gear (ALDFG) is a global challenge that negatively affects marine environment through plastic pollution and continued capture of marine animals, so-called “ghost fishing”. In different pot fisheries, ghost fishing related to ALDFG is of concern, including pot fishery targeting swimming crab (Portunus trituberculatus). This study quantified the ghost fishing efficiency by comparing it to the catch efficiency of actively fished pots of the commercial fishery. The results showed that the ghost fishing affects both target and bycatch species. On average, the ghost fishing pots captured 12.53 % (confidence intervals: 10.45 %–15.00 %) undersized crab and 15.70 % (confidence intervals: 12.08 %–20.74 %) legal-sized crab compared to the actively fished pots. Few individuals of several bycatch species were also captured by ghost fishing pots. The results of this study emphasized the need to develop new management strategies for reducing marine pollution by ALDFG and associated negative effects in this pot fishery.
Afficher plus [+] Moins [-]Abundance and distribution of microplastics on sandy beaches of the eastern Moroccan Mediterranean coast Texte intégral
2024
Azaaouaj, S. | Nachite, D. | Anfuso Melfi, Giorgio | Er-Ramy, N. | Ciencias de la Tierra
Microplastics (MPs) were investigated at 19 sandy beaches along the eastern Mediterranean Moroccan coast. Sediment samples (5 mm–63 μ m) were analyzed to identify MPs abundance, size, shape, color and nature. MPs concentration ranged from 40 ± 7.4 to 230 ± 48.6 MPs kg 1 ; fibrous MPs were the most abundant (74.72 %), followed by fragments (20.26 %), films (3.27 %), pellets (1.42 %) and foams (0.33 %). Large MPs (1–5 mm) accounted for 58 %, while small (< 1 mm) for 42 %. The 1–2 mm fraction of sediments presented the greatest amounts (30.67 %) of MPs. Transparent (50 %) and blue (17 %) were most common colors and most of particles were angular and irregularly shaped. Fourier Transform Infrared Spectroscopy (FTIR) analysis showed that PE (Polyethylene), PS (Polystyrene) and PP (Polypropylene) and PVC (Polyvinyl chloride) were the most common polymers. These findings revealed a moderate level of microplastic pollution along the beaches of the eastern Moroccan Mediterranean coast.
Afficher plus [+] Moins [-]Review on Methods for Assessing and Predicting Leaching of PFAS from Solid Matrices Texte intégral
2024
Navarro, Divina A. | Kabiri, Shervin S. | Bowles, Karl | Knight, Emma R | Braeunig, Jennifer | Srivastava, Prashant | Boxall, Naomi J. | Douglas, Grant | Mueller, Jochen | McLaughlin, Mike J. | Williams, Mike | Kookana, Rai S.
This article reviews methods for estimating leaching of PFAS from contaminated materials. Given the variety of methods, selecting those that best simulate assessment objectives is essential. Specific scenarios requiring PFAS leaching assessment, such as leaving materials in place, reuse, and disposal, are discussed. The knowledge gaps presented could be used to improve existing leaching methods for better predictions and understanding of PFAS leachability. | publishedVersion
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