Marine environmental research最新文献

{"title":"Influence of eco-friendly float replacement on microplastic pollution and their metal adsorption behavior in Sanggou Bay, China.","authors":"Qi Sui, Hao Wang, Guoshun Liu, Xiaoli Chen, Xuemei Sun, Lin Zhu, Manman Wei, Zhihua Feng, Bin Xia","doi":"10.1016/j.marenvres.2025.107590","DOIUrl":"https://doi.org/10.1016/j.marenvres.2025.107590","url":null,"abstract":"<p><p>Mariculture regions represent significant hotspots for microplastic (MP) pollution. While eco-friendly floats are increasingly replacing conventional counterparts, the efficacy of this intervention in mitigating MP pollution and its implications for metal adsorption behavior in the marine environment remain poorly characterized. This study investigated the influence of eco-friendly float replacement on MP pollution and their metal adsorption behavior in Sanggou Bay, China. The results showed that the average abundance of MPs was 4.50 ± 0.57 items/L in surface seawater and 1872.86 ± 138.68 items/kg in sediments, respectively. MPs smaller than 0.5 mm and fibers in shape were dominated in both surface seawater and sediments. Transparent MPs were most prevalent, with polyethylene (PE), polypropylene (PP), and polystyrene (PS) as the dominant polymers. Following the replacement of conventional floats with eco-friendly floats, MP abundance in surface seawater decreased by 77.57 %. Notably, MP toxicity equivalent values in both seawater and sediment were significantly declined, indicating that eco-friendly floats effectively alleviate MP pollution. Analysis of metal adsorption onto MPs in surface seawater indicated that Mn, Cr, and Cu accounted for >84 % of total adsorption. Adsorption behavior was influenced by MP size, polymer type, and ambient metal concentrations. These findings highlight eco-friendly floats as an effective mitigation strategy to reduce MP pollution and advance understanding of the fate and risk of MPs in mariculture ecosystem.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"107590"},"PeriodicalIF":3.2,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145244792","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}

{"title":"Impacts of tail channel alterations on hydrodynamic and environmental conditions in Yellow River Estuary.","authors":"Yuming Cheng, Xiaotian Ma, Jian Sun, Yuanyi Li, Fengze Zhao, Kok Weng Tan","doi":"10.1016/j.marenvres.2025.107597","DOIUrl":"https://doi.org/10.1016/j.marenvres.2025.107597","url":null,"abstract":"<p><p>The geomorphological evolution of the Yellow River Estuary is dominated by sediment discharge and transport. Severe sediment deposition extends the tail channels, increasing the risk of river breach. Therefore, selecting an appropriate channel to maximize sediment transport offshore is critical while ensuring ecological safety. Since sediment and pollutant movement are controlled by hydrodynamics related to coastline changes, this study addresses the insufficiently understood water exchange capacity and its effect on sediment transport and water quality under the past, current, and future scenarios. This study examines hydrodynamics and environmental impacts associated with tail channel alterations using coupled numerical models, including hydrodynamic, sediment, water quality, and water age models. Through these models, water ages under different tail channel usage scenarios were examined. Additionally, the influences of shoreline evolution on hydrodynamics, sediment transport, and primary production were quantitatively assessed, with potential sequences for tail channel usage analyzed. Results show that these factors significantly alter nearshore hydrodynamics and sediment dispersion. The east branch of Qing 8 Cha demonstrated superior water exchange and offshore sediment dispersion capacity, indicated by a limited sediment-laden area and low primary production. While the south and north branches of the Qingshuigou Channel show similar sediment dispersion with no significant improvement to primary production, prioritizing the south branch followed by the north branch is the optimal sequence for enhancing hydrodynamic conditions, albeit at the expense of northern estuary ecology. These findings reveal the hydrodynamic properties of the Qingshuigou Channel outlets and provide insights for management strategies in the Yellow River Estuary.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"107597"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145251637","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}

{"title":"Early biofilm colonization on traditional and biodegradable plastics in the Baltic Sea using a mesocosm approach","authors":"Chiara Gambardella ,&nbsp;Marco Basili ,&nbsp;Filippo Castelli ,&nbsp;Roberta Miroglio ,&nbsp;Elena Manini ,&nbsp;Grazia Marina Quero ,&nbsp;Rodrigo Almeda ,&nbsp;Francesco Regoli ,&nbsp;Marco Faimali ,&nbsp;Francesca Garaventa","doi":"10.1016/j.marenvres.2025.107592","DOIUrl":"10.1016/j.marenvres.2025.107592","url":null,"abstract":"<div><div>Bioplastics are promising alternatives to conventional plastics, but their potential entry into marine ecosystems highlights the need for a better understanding of their interactions with microbial communities, including their role in the plastisphere. Here, we characterized the early biofilm formation on traditional plastics and bioplastics using a mesocosm approach. We tested the hypothesis that distinct bacterial communities selectively colonize traditional and biodegradable plastics in the marine environment. Specifically, fragments of the petroleum-based plastic polypropylene (PP) and the bioplastics Poly(3-hydroxybutyrate)- hydroxyvalerate (PHBv) and polylactic acid (PLA) were submerged in Baltic Sea mesocosms for three weeks. Biofilm colonization, prokaryotic abundance, and community composition were assessed through scanning electronic microscopy analysis, epifluorescence microscopy and 16S rRNA gene metabarcoding, respectively. Biofilm development increased over time on both traditional and bioplastics, with photosynthetic organisms appearing after 3 weeks. However, prokaryotic abundance decreased over time except on PLA surfaces. Prokaryotic communities’ composition differed among biofilms formed on the different polymers. The microbial community associated with conventional plastic PP was more similar to that of the seawater in the control treatment, while biofilms on PLA and PHBv shared a higher degree of similarity with each other. These findings suggest that microbial communities selectively colonize different plastic types, with bioplastics supporting distinct and specific bacterial biofilm assemblages over three-week exposure. The great diversity observed in bioplastics, particularly PLA, suggests they may support more complex and potentially active plastisphere communities after only three weeks of exposure to the Baltic Sea.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"Article 107592"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145225662","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}

{"title":"Changes in call rate and call level of migrating humpback whales (Megaptera novaeangliae) in response to seismic air guns.","authors":"Riona M McNamara, Rebecca A Dunlop","doi":"10.1016/j.marenvres.2025.107415","DOIUrl":"10.1016/j.marenvres.2025.107415","url":null,"abstract":"<p><p>Seismic air gun operations, used for oil and gas exploration, create intense, impulsive signals that can last for days or months. In response to these signals, baleen whales have been shown to change their feeding, breeding, and migratory behaviours, but with highly variable vocal responses. Some studies show an increase in calling activity and call level, suggesting a response indicative of a Lombard response to noise, whereas others found whales decreased call rate and level, suggesting an avoidance response. This study aimed to determine if humpback whales (Megaptera novaeangliae) significantly altered the rate and/or source level of their social calls in response to seismic air gun signals and determined if any changes were outside of 'normal' baseline vocal behaviour. Air guns ranged in size from a small 20 cubic inch gun to a 3130 cubic inch large commercial array, firing every 11 s and towed along a set transect. Individual humpback whales that were exposed to operational air guns were tagged using suction-cup acoustic tags (n = 12). Within these individuals, call rates and call source levels were compared during exposure to air guns, to before exposure. Then, the call rate and source level of whales exposed to air guns were compared to tagged whales that had not been exposed to air guns (n = 21). Results show that whales exposed to air guns generally increased their call rate and call source level, and these call rates and levels were significantly greater compared to unexposed tagged whales. This is consistent with a Lombard response to noise. However, not all tagged whales responded, nor was there a dose-response relationship between air gun received level, air gun proximity, and vocal response. Humpback whales' vocal responses to air guns are inconsistent and may be context-dependent, emphasising the need to understand how whales perceive these signals to assess the true ecological impact of air gun noise.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107415"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144799550","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}

{"title":"Multi-omics approaches provide insights into adaptation to low salinity of intertidal clams.","authors":"Zihan Lin, Honglei Wang, Geqi Gao, Hongtao Nie, Kai Ye, Donghong Niu, Jiale Li","doi":"10.1016/j.marenvres.2025.107467","DOIUrl":"10.1016/j.marenvres.2025.107467","url":null,"abstract":"<p><p>Climate change is reshaping the population distribution of intertidal organisms, with extreme weather inducing salinity fluctuations that challenge intertidal bivalves. In this study, we employed comparative genomics and transcriptomic analyses to investigate the molecular mechanisms underlying low-salinity adaptation in the razor clam (Sinonovacula constricta). We compiled and analyzed genomic data from 19 molluscan species, classified as either euryhaline or stenohaline based on their salinity tolerance. Phylogenetic analysis suggested that partial Venerida clams may have been evolved into adaptation to low salinity environments at 86.45 Mya (million year ago), or earlier. A total of 440 genes in S. constricta genome were detected to be under positive selection through within-species comparison. Furthermore, we identified sixty-nine lipid metabolism-associated orthologous groups (OGs), including four specially expanded gene families in five intertidal bivalves. Additionally, we constructed twenty-seven transcriptomic libraries from gill, mantle and digestive gland tissues of S. constricta, revealing the species employs complex molecular mechanisms in response to low-salinity stress. Twenty-eight positive selected genes exhibited significant differential expression in razor clam transcriptomic data. By integrating genomic and transcriptomic data, we identified candidate genes involved in CDP-choline, CDP-ethanolamine pathways that enhance phospholipid synthesis in S. constricta, potentially representing an adaptive mechanism to low-salinity environments. Notably, we found the lack of Cav2 member of caveolin family in euryhaline clams, which involved in Caveolae formation promoted by phospholipid. These findings enriched our understanding of the adaptive mechanisms and taxonomic characteristics of intertidal bivalves.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107467"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144959145","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}

{"title":"Impact of chlorpyrifos on growth and community structure of diatoms and dinoflagellates in the Bohai Sea, China.","authors":"Xiaoru Cui, Mengxue Xing, Limin Wang, Jing Zhao, Xiulin Wang, Keqiang Li","doi":"10.1016/j.marenvres.2025.107475","DOIUrl":"10.1016/j.marenvres.2025.107475","url":null,"abstract":"<p><p>The diatom/dinoflagellate ratio in the Bohai Sea is influenced by various environmental factors, potentially including the increasing input of agricultural pesticides. This study investigated the effects of chlorpyrifos (CPF) on phytoplankton growth and community structure through field-based culture experiments. The results showed that at a concentration of 30.0 μg L^-1 CPF had a stimulatory effect on algal growth, whereas a concentration of 50.0 μg L^-1 exhibited an inhibitory effect under low-temperature conditions (<24.0 °C). Continuous low-dose exposure to CPF prolonged and amplified the phytoplankton growth plateau. CPF exposure also drove a shift in the phytoplankton community structure from diatom-dominated to dinoflagellate-dominated, with Prorocentrum minimum and Karenia mikimotoi emerging as dominant species. Kinetic analysis revealed that CPF's impact on phytoplankton growth was primarily regulated by nitrogen uptake rates. These findings supplement and clarify a potential regime shift from diatom to dinoflagellate dominance associated with CPF in the Bohai Sea. Future coastal management strategies should account for the ecological risks of residual insecticides to ensure ecosystem stability.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107475"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144959638","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}

{"title":"Corrigendum to \"Microplastic characteristics and their potential ecological risks to Auxis thazard and Symplectoteuthis oualaniensis in the Indian Ocean\" [Mar. Environ. Res. 210(2025) 107304].","authors":"Zhenghao Wang, Menghong Hu, Sijie Fan, Hanfeng Zheng, Cuihua Wang, Manzoor Ahmad, Lingzhi Li, Guoqing Zhao, Gangchen Zhang, Yuqing Zhang, Jianwei Hu, Youji Wang","doi":"10.1016/j.marenvres.2025.107355","DOIUrl":"10.1016/j.marenvres.2025.107355","url":null,"abstract":"","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":" ","pages":"107355"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144718093","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}

{"title":"Isotopic evidence for spatial heterogeneity in trophic levels within benthic food webs across typical habitats along the coast of the eastern Laizhou Bay, China.","authors":"Qi Zhao, Shun-Jie Yuan, Xin Sun, Yan-Hao Zhang, Jin-Ji Liu, Pei-Dong Zhang","doi":"10.1016/j.marenvres.2025.107426","DOIUrl":"10.1016/j.marenvres.2025.107426","url":null,"abstract":"<p><p>This study employed stable isotope analysis (δ¹³C and δ¹⁵N) to examine the trophic sources, nutritional levels of consumers, and ecological niches of macrobenthic organisms across four distinct habitats, including artificial reef area (ARA), marine protected area (MPA), bottom seeding proliferation area (BSPA), and seagrass bed (SGB) in Laizhou Bay during spring and autumn. The results indicate that in spring, the δ¹³C values of particulate organic matter (POM) (-23.44 ± 0.30) and phytoplankton (-21.50 ± 0.65) in ARA, as well as the δ¹⁵N values of zooplankton (10.20 ± 1.21) and POM (6.57 ± 1.35) in autumn, were significantly higher than those in other regions. The diet of polychaetes (the dominant functional group) in ARA shifted from phytoplankton (34.6 %) in spring to zooplankton (59.3 %) in autumn. Regarding trophic niche area (TA), BSPA exhibited the largest value in spring (TA = 43.29), whereas ARA showed the highest value in autumn (TA = 22.53), with SGB displaying the smallest TA. Specifically, in the spring, the TA content in BSPA was 5.6 times higher than that in SGB, while in the autumn, the TA content in ARA was 3.5 times higher than that in SGB respectively. Comparative analyses among habitats suggest that habitat heterogeneity and seasonal dynamics jointly regulate trophic structure through resource partitioning and consumer adaptation. Furthermore, the artificial reef demonstrated elevated trophic levels and more complex trophic linkages, confirming its role in enhancing short-term ecosystem functioning via resource diversification. These findings highlight the importance of maintaining habitat diversity in coastal management and support the strategic deployment of artificial habitats to promote rapid ecological recovery.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107426"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812211","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}

{"title":"Neoichnological experiments reveal key differences between marine bioturbator responses to gradual warming compared to marine heat waves","authors":"Olmo Miguez-Salas ,&nbsp;Lidya G. Tarhan","doi":"10.1016/j.marenvres.2025.107595","DOIUrl":"10.1016/j.marenvres.2025.107595","url":null,"abstract":"<div><div>Seawater temperature fluctuations influence shallow marine ecosystems by disrupting the bioturbating (burrowing and sediment-mixing) activities of benthic species, which can, in turn, strongly affect seafloor geochemical cycling, including sediment oxygenation, organic matter degradation and nutrient regeneration. Although climate change is expected to increase water temperatures across a range of settings, particularly in mid-to high-latitude coastal environments, there is limited understanding of how the temporal dynamics of these changes (e.g., rate, duration and frequency of warming) will shape bioturbator behaviors. In this study, we used common benthic bioturbators (polychaetes and amphipods) from the Connecticut coast to investigate how conditions simulating both marine heat waves (MHWs) and gradual warming influence bioturbation and burrow features in mesocosm experiments. In addition, we use experimental observations of changes in burrow morphology to develop new criteria for diagnosing the impact of warming from trace fossil assemblages, thus providing a new window into the impact of past episodes of warming on seafloor communities. Our findings indicate that conditions simulating marine heat waves (i.e., episodic, punctuated warming) have distinct and contrasting effects on bioturbators relative to gradual warming. We observe that, for nereid polychaetes, gradual warming increased burrow area and decreased maximum burrow depth, whereas MHW conditions had limited effect. For eunicid polychaetes, gradual warming increased maximum burrow depth, whereas MHWs decreased burrow area. For amphipods, both burrow area and maximum burrow depth increased under MHW conditions. These results highlight that the effects of temperature variations on bioturbators are species- and ecology-specific; different infaunal taxa living within the same community have notably different thermal tolerances.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"Article 107595"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227239","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}

{"title":"Corrigendum to \"Combined effects of ocean acidification and warming on phytoplankton productivity and community structure in the coastal water of Southern East\" [Mar. Environ. Res. (2025) 107352].","authors":"Yukun Zhang, John Beardall, Kunshan Gao","doi":"10.1016/j.marenvres.2025.107419","DOIUrl":"10.1016/j.marenvres.2025.107419","url":null,"abstract":"","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":" ","pages":"107419"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144799549","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}