Pub Date : 2025-11-19DOI: 10.1016/j.marenvres.2025.107729
Izwan Bharudin
{"title":"Charting the blue resistome: Sea turtles as bioindicators of antibiotic pollution and resistance","authors":"Izwan Bharudin","doi":"10.1016/j.marenvres.2025.107729","DOIUrl":"10.1016/j.marenvres.2025.107729","url":null,"abstract":"","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107729"},"PeriodicalIF":3.2,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145573950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The European eel (Anguilla anguilla) is a facultative catadromous migratory species that spawns in the Sargasso Sea, and grows over a wide continental range from the Barents Sea (72°N) to the southern limit of Morocco (30°N). Recruitment refers to the arrival of glass eels on continental shelves after an oceanic larval drift from the spawning ground. Although recruitment trends used to be quite consistent across European regions, recent modelling exercises have highlighted regional variations. At the European scale, we examined the relative contributions of six regions to overall recruitment over time using trend analysis methods. Variations in these contributions may be related to changes in environmental conditions. We identified the ecological processes preceding recruitment and their associated spatial and temporal scopes (e.g., spawning in the Sargasso Sea from March to May) to propose hypotheses regarding the potential influence of environmental factors on these processes. Using short- and long-term correlation strategies, we examined the relationships between recruitment and selected environmental variables. Our findings support the existence of spatial heterogeneity in recruitment distribution across Europe, which may inform management decisions at both local and broader levels for this species.
{"title":"Shifts in the European eel recruitment distribution: the impact of changing environmental conditions?","authors":"Mathilde Bénézech , Hilaire Drouineau , Virginie Bornarel , Cédric Briand , Estibaliz Díaz , María Mateo , Laurent Beaulaton","doi":"10.1016/j.marenvres.2025.107723","DOIUrl":"10.1016/j.marenvres.2025.107723","url":null,"abstract":"<div><div>The European eel (<em>Anguilla anguilla</em>) is a facultative catadromous migratory species that spawns in the Sargasso Sea, and grows over a wide continental range from the Barents Sea (72°N) to the southern limit of Morocco (30°N). Recruitment refers to the arrival of glass eels on continental shelves after an oceanic larval drift from the spawning ground. Although recruitment trends used to be quite consistent across European regions, recent modelling exercises have highlighted regional variations. At the European scale, we examined the relative contributions of six regions to overall recruitment over time using trend analysis methods. Variations in these contributions may be related to changes in environmental conditions. We identified the ecological processes preceding recruitment and their associated spatial and temporal scopes (e.g., spawning in the Sargasso Sea from March to May) to propose hypotheses regarding the potential influence of environmental factors on these processes. Using short- and long-term correlation strategies, we examined the relationships between recruitment and selected environmental variables. Our findings support the existence of spatial heterogeneity in recruitment distribution across Europe, which may inform management decisions at both local and broader levels for this species.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"214 ","pages":"Article 107723"},"PeriodicalIF":3.2,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145661576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-19DOI: 10.1016/j.marenvres.2025.107732
Leslie M. Henderson , Jeremiah Blondeau , Marcia Taylor , Richard S. Nemeth , Tyler B. Smith
Human activities in tropical watersheds are increasing rates of terrestrial silt and clay deposition to nearshore environments and negatively impacting coral reef ecosystems. We sampled sediment flux across a range of coral reef environments in the US Virgin Islands, Caribbean Sea using standard sediment traps and evaluated the relationship of sediment particle size and quality (organic, carbonate, terrigenous) on coral health. We found high variability in rates of sediment deposition that corresponded temporally to storm and swell events. However, this was driven spatially by distinctions between nearshore and offshore habitats and orientation to Atlantic swell regimes, suggesting that sediment impacts also have a strong spatial component on Caribbean reefs. We found that increasing fluxes of silt-clay and terrestrial sediments in nearshore environments were linearly related to a higher prevalence of coral bleaching, old partial mortality and overall health impairment at a site. In contrast to expectations, total sediment and organic fluxes in nearshore environments were not related to any measure of coral health. The result from total sediment flux suggests that sediment quality is as more important to coral health than overall quantity and should be incorporated into coral reef sediment monitoring studies.
{"title":"Sediment flux and stony coral health in the nearshore US Virgin Islands","authors":"Leslie M. Henderson , Jeremiah Blondeau , Marcia Taylor , Richard S. Nemeth , Tyler B. Smith","doi":"10.1016/j.marenvres.2025.107732","DOIUrl":"10.1016/j.marenvres.2025.107732","url":null,"abstract":"<div><div>Human activities in tropical watersheds are increasing rates of terrestrial silt and clay deposition to nearshore environments and negatively impacting coral reef ecosystems. We sampled sediment flux across a range of coral reef environments in the US Virgin Islands, Caribbean Sea using standard sediment traps and evaluated the relationship of sediment particle size and quality (organic, carbonate, terrigenous) on coral health. We found high variability in rates of sediment deposition that corresponded temporally to storm and swell events. However, this was driven spatially by distinctions between nearshore and offshore habitats and orientation to Atlantic swell regimes, suggesting that sediment impacts also have a strong spatial component on Caribbean reefs. We found that increasing fluxes of silt-clay and terrestrial sediments in nearshore environments were linearly related to a higher prevalence of coral bleaching, old partial mortality and overall health impairment at a site. In contrast to expectations, total sediment and organic fluxes in nearshore environments were not related to any measure of coral health. The result from total sediment flux suggests that sediment quality is as more important to coral health than overall quantity and should be incorporated into coral reef sediment monitoring studies.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"214 ","pages":"Article 107732"},"PeriodicalIF":3.2,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-19DOI: 10.1016/j.marenvres.2025.107731
Zhangbin Liu , Jianqu Chen , Jingzhuo Ding , Yang Hu , Jian Zhang
Seaweed beds are essential components of coastal ecosystems, playing a pivotal role in global carbon cycling and marine nutrient dynamics. The production and decomposition of seaweed litter directly influence sediment nutrient supply, benthic community structure, and ecosystem stability. This review synthesizes current research on seaweed litter production, deposition, and decomposition, with a focus on natural drivers (e.g., temperature, light, seasonal variations, hydrodynamics, and biotic interactions) and anthropogenic factors (e.g., seaweed aquaculture, marine pollution, overfishing, and coastal development) affecting litter accumulation and breakdown rates. Climate change is expected to accelerate seaweed growth and litterfall but may also alter microbial and benthic communities, thereby influencing decomposition processes. Additionally, the chemical composition of different seaweed species (e.g., C/N ratio, lignin content, and secondary metabolites) significantly affects decomposition rates. Future studies should prioritize the interactions of multiple environmental factors, long-term spatiotemporal monitoring, the impacts of extreme climatic events, and the prolonged effects of human activities, while integrating ecosystem modeling to predict future trends. The role of microbial communities and their enzymatic activities in seaweed decomposition also warrants further investigation. To enhance the sustainable management of macroalgal ecosystems, an ecosystem-based management approach should be adopted, alongside efforts to explore the resource utilization of seaweed litter, including applications in biofuel production, organic fertilizers, and bioactive compound extraction. This review provides a scientific foundation for understanding the ecological function of seaweed litter and offers insights into marine carbon sequestration, fisheries management, and coastal ecosystem conservation in the context of global change.
{"title":"Environmental drivers and ecological responses of seaweed litter production and decomposition: A comprehensive review","authors":"Zhangbin Liu , Jianqu Chen , Jingzhuo Ding , Yang Hu , Jian Zhang","doi":"10.1016/j.marenvres.2025.107731","DOIUrl":"10.1016/j.marenvres.2025.107731","url":null,"abstract":"<div><div>Seaweed beds are essential components of coastal ecosystems, playing a pivotal role in global carbon cycling and marine nutrient dynamics. The production and decomposition of seaweed litter directly influence sediment nutrient supply, benthic community structure, and ecosystem stability. This review synthesizes current research on seaweed litter production, deposition, and decomposition, with a focus on natural drivers (e.g., temperature, light, seasonal variations, hydrodynamics, and biotic interactions) and anthropogenic factors (e.g., seaweed aquaculture, marine pollution, overfishing, and coastal development) affecting litter accumulation and breakdown rates. Climate change is expected to accelerate seaweed growth and litterfall but may also alter microbial and benthic communities, thereby influencing decomposition processes. Additionally, the chemical composition of different seaweed species (e.g., C/N ratio, lignin content, and secondary metabolites) significantly affects decomposition rates. Future studies should prioritize the interactions of multiple environmental factors, long-term spatiotemporal monitoring, the impacts of extreme climatic events, and the prolonged effects of human activities, while integrating ecosystem modeling to predict future trends. The role of microbial communities and their enzymatic activities in seaweed decomposition also warrants further investigation. To enhance the sustainable management of macroalgal ecosystems, an ecosystem-based management approach should be adopted, alongside efforts to explore the resource utilization of seaweed litter, including applications in biofuel production, organic fertilizers, and bioactive compound extraction. This review provides a scientific foundation for understanding the ecological function of seaweed litter and offers insights into marine carbon sequestration, fisheries management, and coastal ecosystem conservation in the context of global change.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107731"},"PeriodicalIF":3.2,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145573961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-19DOI: 10.1016/j.marenvres.2025.107724
Pietro Battaglia , Danilo Malara , Cristina Pedà , Davide Ciraolo , Teresa Romeo
Temporal changes in the diet composition of swordfish (Xiphias gladius) were observed in one of the most important Mediterranean foraging and reproductive ground, the Strait of Messina and the surrounding areas. Qualitative and quantitative analyses of the diet composition were performed, and a description of the feeding strategy of this predator were collected. A total of 133 individuals with 100–220 cm of lower jaw fork length (LJFL) was collected in two different fishing seasons (i.e. 2008 and 2019). Overall, 55 prey taxa were identified, and the most abundant were teleosts (19 families and 34 species) and cephalopods (14 families and 19 species). The percentage index of relative importance (%IRI) revealed that the cephalopods Todarodes sagittatus (%IRI = 48.17), Ancistroteuthis lichensteinii (%IRI = 23.14), Heteroteuthis dispar (%IRI = 10.23) and Ommastrephes caroli (%IRI = 6.70) were the most important prey items. Furthermore, the analysis of feeding strategy confirmed that squids were dominant in the swordfish's diet in the study area. Our results highlighted temporal changes in prey composition and feeding activity of swordfish. Generally, Ommastrephidae, Onychoteuthidae, Sepiolidae and Paralepididae were the main families responsible for the dissimilarity in the diet composition of Xiphias gladius between sampling years (2008 and 2019). These dietary changes could be a consequence of the environmental variations occurred in the Mediterranean Sea. To explore this hypothesis, environmental data were derived and analysed from Copernicus Marine Environment Monitoring Service (CMEMS). The results showed how surface temperature, despite frequent upwelling events, has been gradually warming in the years 1998–2008 (0.0509 °C/year), which is slightly more pronounced in 2009–2019 (0.0656 °C/year) while primary production remains stable. The aforementioned environmental changes are reflected in the dietary composition of marine predators, such as swordfish, with variations in food resources and feeding habits being observed. These variations may have important consequences in terms of ecosystem resilience, since fluctuations of key-stone prey could produce bottom-up effects on predator populations or top-down effects on their prey.
{"title":"Temporal changes in the diet composition of swordfish, Xiphias gladius (Linnaeus, 1758), in a Mediterranean foraging and reproductive ground","authors":"Pietro Battaglia , Danilo Malara , Cristina Pedà , Davide Ciraolo , Teresa Romeo","doi":"10.1016/j.marenvres.2025.107724","DOIUrl":"10.1016/j.marenvres.2025.107724","url":null,"abstract":"<div><div>Temporal changes in the diet composition of swordfish (<em>Xiphias gladius</em>) were observed in one of the most important Mediterranean foraging and reproductive ground, the Strait of Messina and the surrounding areas. Qualitative and quantitative analyses of the diet composition were performed, and a description of the feeding strategy of this predator were collected. A total of 133 individuals with 100–220 cm of lower jaw fork length (LJFL) was collected in two different fishing seasons (i.e. 2008 and 2019). Overall, 55 prey taxa were identified, and the most abundant were teleosts (19 families and 34 species) and cephalopods (14 families and 19 species). The percentage index of relative importance (%IRI) revealed that the cephalopods <em>Todarodes sagittatus</em> (%IRI = 48.17), <em>Ancistroteuthis lichensteinii</em> (%IRI = 23.14), <em>Heteroteuthis dispar</em> (%IRI = 10.23) and <em>Ommastrephes caroli</em> (%IRI = 6.70) were the most important prey items. Furthermore, the analysis of feeding strategy confirmed that squids were dominant in the swordfish's diet in the study area. Our results highlighted temporal changes in prey composition and feeding activity of swordfish. Generally, Ommastrephidae, Onychoteuthidae, Sepiolidae and Paralepididae were the main families responsible for the dissimilarity in the diet composition of <em>Xiphias gladius</em> between sampling years (2008 and 2019). These dietary changes could be a consequence of the environmental variations occurred in the Mediterranean Sea. To explore this hypothesis, environmental data were derived and analysed from Copernicus Marine Environment Monitoring Service (CMEMS). The results showed how surface temperature, despite frequent upwelling events, has been gradually warming in the years 1998–2008 (0.0509 °C/year), which is slightly more pronounced in 2009–2019 (0.0656 °C/year) while primary production remains stable. The aforementioned environmental changes are reflected in the dietary composition of marine predators, such as swordfish, with variations in food resources and feeding habits being observed. These variations may have important consequences in terms of ecosystem resilience, since fluctuations of key-stone prey could produce bottom-up effects on predator populations or top-down effects on their prey.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107724"},"PeriodicalIF":3.2,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145574020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-16DOI: 10.1016/j.marenvres.2025.107719
Yaping Wu , Xiangyu Li , Peijian Ding , Huifang Li , Juntian Xu
Triazine herbicides are increasingly detected in coastal oceans due to extensive usage in agriculture and shipping, raising significant concerns about their impact on primary producers and ecosystem functioning. This study integrates extensive field surveys across the East China Sea and targeted laboratory assays using Skeletonema costatum and Karenia mikimotoi, to evaluate the species-specific and community-level inhibition of phytoplankton photosynthesis under environmentally relevant triazine concentrations. Field measurements using chlorophyll fluorescence revealed that Irgarol 1051 consistently induced the strongest reduction in effective photochemical quantum yields (up to 29 % inhibition at 0.4 μg L−1), compared to Atrazine (18 %) and Simazine (18 %). In controlled experiments, S. costatum exhibited substantial tolerance to Atrazine and Simazine but showed marked sensitivity to Irgarol 1051, with up to 40 % inhibition of PSII at the highest exposure. Conversely, K. mikimotoi was highly susceptible to all three herbicides, with Irgarol 1051 exposure yielding up to 64 % reduction in photosynthetic quantum yield, and notable sensitivity to Atrazine and Simazine (up to 20 % inhibition at 0.4 μg L−1). Our study underscores a heightened ecological risk: triazine herbicides have the potential to alter phytoplankton community structures, disrupt biogeochemical cycles, and undermine the productivity of coastal ecosystems. These findings highlight the urgent need for improved herbicide management, and regular environmental monitoring to mitigate the risks posed by persistent triazine pollution to coastal marine ecosystems globally.
{"title":"Triazine herbicides inhibit phytoplankton photosynthesis in the East China Sea: A species-specific assessment","authors":"Yaping Wu , Xiangyu Li , Peijian Ding , Huifang Li , Juntian Xu","doi":"10.1016/j.marenvres.2025.107719","DOIUrl":"10.1016/j.marenvres.2025.107719","url":null,"abstract":"<div><div>Triazine herbicides are increasingly detected in coastal oceans due to extensive usage in agriculture and shipping, raising significant concerns about their impact on primary producers and ecosystem functioning. This study integrates extensive field surveys across the East China Sea and targeted laboratory assays using <em>Skeletonema costatum</em> and <em>Karenia mikimotoi</em>, to evaluate the species-specific and community-level inhibition of phytoplankton photosynthesis under environmentally relevant triazine concentrations. Field measurements using chlorophyll fluorescence revealed that Irgarol 1051 consistently induced the strongest reduction in effective photochemical quantum yields (up to 29 % inhibition at 0.4 μg L<sup>−1</sup>), compared to Atrazine (18 %) and Simazine (18 %). In controlled experiments, <em>S. costatum</em> exhibited substantial tolerance to Atrazine and Simazine but showed marked sensitivity to Irgarol 1051, with up to 40 % inhibition of PSII at the highest exposure. Conversely, <em>K. mikimotoi</em> was highly susceptible to all three herbicides, with Irgarol 1051 exposure yielding up to 64 % reduction in photosynthetic quantum yield, and notable sensitivity to Atrazine and Simazine (up to 20 % inhibition at 0.4 μg L<sup>−1</sup>). Our study underscores a heightened ecological risk: triazine herbicides have the potential to alter phytoplankton community structures, disrupt biogeochemical cycles, and undermine the productivity of coastal ecosystems. These findings highlight the urgent need for improved herbicide management, and regular environmental monitoring to mitigate the risks posed by persistent triazine pollution to coastal marine ecosystems globally.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107719"},"PeriodicalIF":3.2,"publicationDate":"2025-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145541235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-14DOI: 10.1016/j.marenvres.2025.107718
Danilo Serrão Moutinho , Yure Jefferson da Cruz do Nascimento , Irina Sofia Cardoso de Carvalho , Lílian Lund Amado
Coastal estuaries in tropical regions are highly dynamic ecosystems that are influenced by tidal cycles, seasonal variations, and anthropogenic activities. This study evaluated oxidative stress biomarkers in the native gastropod Vitta zebra across three sites with different levels of human impact along an estuary on the Eastern Amazon coast. Biometric and biochemical analyses were performed on two tissues (visceral mass and foot muscle) during the rainy and dry seasons and at both high and low tides. Enzymatic and non-enzymatic biomarkers related to antioxidant defenses (ACAP, GSH, GCL, GPx, GR, GST) and oxidative damage (LPO) were measured. Our results revealed distinct antioxidant profiles across seasons, tides, and sites. Organisms from the most impacted site (the Icoaraci area) showed higher GCL activity during the rainy season and increased GSH levels in the dry season, suggesting possible pollution-induced tolerance. In contrast, animals from the reference site (the Cotijuba site) exhibited antioxidant modulation mainly in response to tidal variation. Overall, V. zebra demonstrated plasticity in redox regulation under multiple stressors, representing a promising sentinel organism for biomonitoring environmental quality in Amazonian estuaries.
{"title":"Oxidative stress biomarkers in Vitta zebra (Gastropoda): responses to tidal, seasonal and anthropogenic pressures in an estuary of the Eastern Amazon","authors":"Danilo Serrão Moutinho , Yure Jefferson da Cruz do Nascimento , Irina Sofia Cardoso de Carvalho , Lílian Lund Amado","doi":"10.1016/j.marenvres.2025.107718","DOIUrl":"10.1016/j.marenvres.2025.107718","url":null,"abstract":"<div><div>Coastal estuaries in tropical regions are highly dynamic ecosystems that are influenced by tidal cycles, seasonal variations, and anthropogenic activities. This study evaluated oxidative stress biomarkers in the native gastropod <em>Vitta zebra</em> across three sites with different levels of human impact along an estuary on the Eastern Amazon coast. Biometric and biochemical analyses were performed on two tissues (visceral mass and foot muscle) during the rainy and dry seasons and at both high and low tides. Enzymatic and non-enzymatic biomarkers related to antioxidant defenses (ACAP, GSH, GCL, GPx, GR, GST) and oxidative damage (LPO) were measured. Our results revealed distinct antioxidant profiles across seasons, tides, and sites. Organisms from the most impacted site (the Icoaraci area) showed higher GCL activity during the rainy season and increased GSH levels in the dry season, suggesting possible pollution-induced tolerance. In contrast, animals from the reference site (the Cotijuba site) exhibited antioxidant modulation mainly in response to tidal variation. Overall, <em>V. zebra</em> demonstrated plasticity in redox regulation under multiple stressors, representing a promising sentinel organism for biomonitoring environmental quality in Amazonian estuaries.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107718"},"PeriodicalIF":3.2,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145534472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-14DOI: 10.1016/j.marenvres.2025.107716
Ratchanee Kaewsrikhaw , Milica Stankovic , Pere Masqué , Mathew A. Vanderklift , Tipamat Upanoi , Anchana Prathep
Seagrass restoration is gaining popularity as a nature-based method for climate change mitigation, owing to its effectiveness in capturing and storing organic carbon (Corg). However, demonstrating blue carbon additionality — defined as a measurable increase in carbon stocks directly attributable to restoration activities — remains challenging. This research assessed sedimentary Corg stocks and carbon accumulation rates in restored tropical seagrass meadows throughout Thailand. Despite successful restoration at multiple sites, sediment analysis showed little Corg accumulation, low Corg and organic matter content, with non-significant differences among restored seagrass areas, patchy natural meadows, and nearby bare sand areas. Limited sediment accumulation was further supported by observations of sediment mixing and the absence of clear depositional trends along depth. These sediment properties reflect in the low Corg stocks and no significant differences between restored, patchy natural seagrass and nearby bare sand areas. However, there was significant difference between the sites. Our findings suggest that these restored meadows remain non-depositional environments, potentially due to various reasons such as geomorphological, hydrodynamic conditions, and shoot density. The study emphasizes the considerable spatial differences in blue carbon potential and highlights the complexity in precisely demonstrating carbon additionality in tropical seagrass restoration.
{"title":"Limited site-specific blue carbon recovery following tropical seagrass restoration in Thailand","authors":"Ratchanee Kaewsrikhaw , Milica Stankovic , Pere Masqué , Mathew A. Vanderklift , Tipamat Upanoi , Anchana Prathep","doi":"10.1016/j.marenvres.2025.107716","DOIUrl":"10.1016/j.marenvres.2025.107716","url":null,"abstract":"<div><div>Seagrass restoration is gaining popularity as a nature-based method for climate change mitigation, owing to its effectiveness in capturing and storing organic carbon (C<sub>org</sub>). However, demonstrating blue carbon additionality — defined as a measurable increase in carbon stocks directly attributable to restoration activities — remains challenging. This research assessed sedimentary C<sub>org</sub> stocks and carbon accumulation rates in restored tropical seagrass meadows throughout Thailand. Despite successful restoration at multiple sites, sediment analysis showed little C<sub>org</sub> accumulation, low C<sub>org</sub> and organic matter content, with non-significant differences among restored seagrass areas, patchy natural meadows, and nearby bare sand areas. Limited sediment accumulation was further supported by observations of sediment mixing and the absence of clear depositional trends along depth. These sediment properties reflect in the low C<sub>org</sub> stocks and no significant differences between restored, patchy natural seagrass and nearby bare sand areas. However, there was significant difference between the sites. Our findings suggest that these restored meadows remain non-depositional environments, potentially due to various reasons such as geomorphological, hydrodynamic conditions, and shoot density. The study emphasizes the considerable spatial differences in blue carbon potential and highlights the complexity in precisely demonstrating carbon additionality in tropical seagrass restoration.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107716"},"PeriodicalIF":3.2,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145564463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-14DOI: 10.1016/j.marenvres.2025.107707
E. Ferrari , A. Spagnuolo , I. Corsi
Nanoplastics (<1 μm) are emerging pollutants with potential adverse effects on marine organisms, particularly during sensitive early life stages such as embryos and larvae. Marine invertebrates are key targets of nanoparticles toxicity and suitable models for assessing developmental impacts, yet their embryonic and larval stages remain understudied. This review synthesizes current knowledge on the embryotoxic effects of nanoplastics in marine invertebrates, focusing on studies using polystyrene nanoparticles (PS NPs) across diverse taxa including Rotifera, Mollusca, Arthropoda, Echinodermata, and invertebrate Chordates. Toxicity of PS NPs depends on surface functionalization, with amino-modified PS-NH2 generally more harmful than unmodified or carboxylated PS-COOH. Reported effects include oxidative stress, neurotoxicity, impaired fertilization in mollusks, skeletal defects in echinoderms, and altered behavior in crustaceans. Among tested models, ascidians emerge as particularly promising due to their phylogenetic proximity to vertebrates and compliance with EU legislation (Directive, 2010/63/EU), positioning them as ethically and scientifically valuable alternatives for developmental toxicity studies.
Despite growing awareness, the current body of literature is constrained by a limited range of particle types, simplified exposure scenarios, and a focus on a few model organisms. To improve ecological relevance, future research should prioritize the use of environmentally realistic concentrations, diversify polymer types beyond PS, and include early life stages of ecologically important but underrepresented marine invertebrates. This will be essential to better understand the real-world impact of nanoplastics on marine ecosystems and to support more effective environmental risk assessment and regulatory frameworks.
{"title":"Impact of polystyrene nanoplastics on early life stages of marine invertebrates: current knowledge and future research perspectives","authors":"E. Ferrari , A. Spagnuolo , I. Corsi","doi":"10.1016/j.marenvres.2025.107707","DOIUrl":"10.1016/j.marenvres.2025.107707","url":null,"abstract":"<div><div>Nanoplastics (<1 μm) are emerging pollutants with potential adverse effects on marine organisms, particularly during sensitive early life stages such as embryos and larvae. Marine invertebrates are key targets of nanoparticles toxicity and suitable models for assessing developmental impacts, yet their embryonic and larval stages remain understudied. This review synthesizes current knowledge on the embryotoxic effects of nanoplastics in marine invertebrates, focusing on studies using polystyrene nanoparticles (PS NPs) across diverse taxa including Rotifera, Mollusca, Arthropoda, Echinodermata, and invertebrate Chordates. Toxicity of PS NPs depends on surface functionalization, with amino-modified PS-NH<sub>2</sub> generally more harmful than unmodified or carboxylated PS-COOH. Reported effects include oxidative stress, neurotoxicity, impaired fertilization in mollusks, skeletal defects in echinoderms, and altered behavior in crustaceans. Among tested models, ascidians emerge as particularly promising due to their phylogenetic proximity to vertebrates and compliance with EU legislation (Directive, 2010/63/EU), positioning them as ethically and scientifically valuable alternatives for developmental toxicity studies.</div><div>Despite growing awareness, the current body of literature is constrained by a limited range of particle types, simplified exposure scenarios, and a focus on a few model organisms. To improve ecological relevance, future research should prioritize the use of environmentally realistic concentrations, diversify polymer types beyond PS, and include early life stages of ecologically important but underrepresented marine invertebrates. This will be essential to better understand the real-world impact of nanoplastics on marine ecosystems and to support more effective environmental risk assessment and regulatory frameworks.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107707"},"PeriodicalIF":3.2,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145564412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Black carbon (BC) is a key oceanic carbon sink, particularly in coastal bays, owing to its persistent and refractory properties. However, understanding of the sources and temporal-spatial variations of sedimentary BC in coastal bays remains limited. Analysis of spatiotemporal variations in BC, total organic carbon (TOC), total nitrogen (TN), and their isotopic compositions (δ13CTOC, δ15N, δ13CBC), as well as C/N and BC/TOC ratios, in surface sediments of Zhanjiang Bay (ZJB) over four seasons were conducted to elucidate the seasonal dynamics of organic carbon in the bay. Our results showed that terrestrial organic matter was found to contribute 55 %–62 % of TOC in sediments across all four seasons. Fossil fuel combustion was the primary source of BC in the upper bay, while biomass burning dominated in the lower bay. Significantly higher TOC and BC concentrations in the upper bay than in the lower bay are driven by two primary factors. Firstly, the finer sediment grain size (the average content of silt and clay in the four seasons: 85.9 % ± 18.2 %) due to aquaculture activities in the upper bay promotes the preservation of TOC and BC. Secondly, a frontal system between the upper and lower bay traps organic matter derived from the terrestrial input and local anthropogenic activities, thereby enhancing the adsorption capacity of upper bay sediments. These factors have important implications for global carbon cycling and sequestration, and further highlight the considerable impact of oyster farming and weak hydrodynamic conditions on the burial of coastal sedimentary organic matter.
{"title":"Sources and temporal-spatial variations of sedimentary organic matter and black carbon in Zhanjiang Bay: Insights into coastal carbon burial","authors":"Yuanhao Zeng , Qibin Lao , Chunqing Chen , Hui Zeng , Fajin Chen","doi":"10.1016/j.marenvres.2025.107711","DOIUrl":"10.1016/j.marenvres.2025.107711","url":null,"abstract":"<div><div>Black carbon (BC) is a key oceanic carbon sink, particularly in coastal bays, owing to its persistent and refractory properties. However, understanding of the sources and temporal-spatial variations of sedimentary BC in coastal bays remains limited. Analysis of spatiotemporal variations in BC, total organic carbon (TOC), total nitrogen (TN), and their isotopic compositions (δ<sup>13</sup>C<sub>TOC</sub>, δ<sup>15</sup>N, δ<sup>13</sup>C<sub>BC</sub>), as well as C/N and BC/TOC ratios, in surface sediments of Zhanjiang Bay (ZJB) over four seasons were conducted to elucidate the seasonal dynamics of organic carbon in the bay. Our results showed that terrestrial organic matter was found to contribute 55 %–62 % of TOC in sediments across all four seasons. Fossil fuel combustion was the primary source of BC in the upper bay, while biomass burning dominated in the lower bay. Significantly higher TOC and BC concentrations in the upper bay than in the lower bay are driven by two primary factors. Firstly, the finer sediment grain size (the average content of silt and clay in the four seasons: 85.9 % ± 18.2 %) due to aquaculture activities in the upper bay promotes the preservation of TOC and BC. Secondly, a frontal system between the upper and lower bay traps organic matter derived from the terrestrial input and local anthropogenic activities, thereby enhancing the adsorption capacity of upper bay sediments. These factors have important implications for global carbon cycling and sequestration, and further highlight the considerable impact of oyster farming and weak hydrodynamic conditions on the burial of coastal sedimentary organic matter.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107711"},"PeriodicalIF":3.2,"publicationDate":"2025-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145549964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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