Marine environmental research最新文献

{"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}

{"title":"Integrating multi-level approaches to assess blue mussel (Mytilus spp.) responses to short-term temperature and salinity changes.","authors":"Colleen Guinle, Ridho Wiranda Gurning, Clément Baratange, Bruno Cognie, Aurélie Mossion, Gaëtane Wielgosz-Collin, Samuel Bertrand, Grégory Montiel, Laurence Poirier, Paul Déléris, Aurore Zalouk-Vergnoux","doi":"10.1016/j.marenvres.2025.107436","DOIUrl":"10.1016/j.marenvres.2025.107436","url":null,"abstract":"<p><p>Climate change is exacerbating temperature and salinity variations in marine ecosystems, thereby challenging the physiological resilience of bivalves like blue mussels (Mytilus spp.). Despite comprehensive studies on these organisms' physiological and molecular responses to such environmental stress, our understanding of tissue-specific adaptations and the role of lipid metabolism is limited. This study investigated the short-term effects of warming (+3.5 °C and +6.0 °C) and reduced salinity (-6 and -12 PSU) on Mytilus spp. using an integrative approach that included physiological indicators, lipidomic, biochemical, and molecular analyses across several tissues. The mussel clearance rate increased under thermal stress and decreased under hyposaline stress. Both stressors resulted in a lower condition index, suggesting energy depletion and specific metabolic changes. Lipidomic analysis revealed significant fatty acid and lipid composition alterations, indicating membrane remodelling to maintain cellular integrity. Gene expression analyses demonstrated distinct responses across tissues: the gills activated protective mechanisms (i.e., up-regulation of heat shock protein-encoding genes (hsp)) in response to both stressors, whereas the digestive gland prioritised energy conservation and damage mitigation (i.e., down-regulation of hsp, metabolic, and apoptotic marker genes). These divergent responses indicate that mussels use tissue-specific strategies to balance stress resistance and metabolic trade-offs. Despite demonstrating notable physiological plasticity, our findings highlight the significant metabolic costs associated with environmental stress adaptation. This study provides new insights into the complex, multi-level strategies that Mytilus spp. employ to maintain homeostasis in the face of multiple stressors, with implications for predicting their resilience under future climate conditions.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107436"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144817072","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":"Ocean acidification impairs growth and induces oxidative stress in the macroalgae Ulva fasciata and Petalonia fascia.","authors":"Fernanda Ribeiro de Freitas, Letícia Viana Barboza, Vitória Caroline Pereira Kühl, Ítalo Braga Castro, Milton Costa Lima Neto","doi":"10.1016/j.marenvres.2025.107429","DOIUrl":"10.1016/j.marenvres.2025.107429","url":null,"abstract":"<p><p>Ocean acidification (OA), driven by increasing anthropogenic CO₂ uptake, poses a significant threat to marine ecosystems; understanding the physiological responses of key primary producers like macroalgae is crucial for predicting ecological consequences. This study investigated the impacts of OA on the green alga Ulva fasciata and the brown alga Petalonia fascia. We aimed to determine the effects of decreased pH on their growth, photosynthetic performance, biochemical composition, and oxidative stress responses. Algae were exposed for 15 days to three pH levels: 8.2, 7.4 and 6.5. We measured multiple parameters including relative growth rate, chlorophyll a fluorescence parameters, H₂O₂ content, lipid peroxidation, and activities of superoxide dismutase and catalase. Results showed that decreasing pH reduced relative growth rate in both species, with reductions of up to 58 % in U. fasciata and 64 % in P. fascia at pH 6.5. Photosynthetic efficiency and chlorophyll content also declined significantly under lower pH, while non-photochemical quenching generally increased. Both species exhibited increased membrane damage, H₂O₂ content, and TBARS levels at lower pH, indicative of oxidative stress. Antioxidant enzyme activities were significantly modulated, with significant interactions between pH and species observed for most parameters, highlighting differential physiological adjustments. These findings indicate that both Ulva fasciata and Petalonia fascia are susceptible to detrimental effects from simulated OA, suggesting potential shifts in the competitive balance and structure of intertidal macroalgal communities.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107429"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144799552","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":"Common bottlenose dolphin habitat suitability in Malta's coastal waters as a human-altered environment.","authors":"Francesca Soster, Charles Galdies, Tim Awbery, Adam Gauci, Benjamin Metzger, Nicholas Barbara, Bruno Díaz López","doi":"10.1016/j.marenvres.2025.107422","DOIUrl":"10.1016/j.marenvres.2025.107422","url":null,"abstract":"<p><p>Marine ecosystems, particularly in coastal regions, are increasingly shaped by human activities occurring both on land and at sea. As anthropogenic pressures intensify, understanding species habitat preferences and their interactions with human-altered environments is critical for guiding conservation efforts. This study provides the first comprehensive assessment of bottlenose dolphin (Tursiops truncatus) habitat suitability and exposure to human activities in Maltese waters, a region characterised by intense maritime activity but limited research effort and baseline knowledge on the species. Using a MaxEnt model, we integrated sightings from multiple surveys (2012-2021) with key environmental (salinity, chlorophyll-a, depth) and anthropogenic (vessel traffic density) predictors to identify areas of ecological importance and potential conflict. Results revealed a strong preference for shallow coastal waters, primarily over the Malta Plateau. Salinity and chlorophyll-a emerged as the strongest environmental drivers, while vessel traffic density had limited standalone influence, possibly reflecting dolphins' behavioural adaptability in resource-rich but human-impacted environments. An exposure index was developed to identify areas where high habitat suitability overlaps with vessel traffic and Fish Aggregating Device (FAD) deployment, highlighting several zones of potential spatial conflict. These findings highlight the importance of integrating ecological and anthropogenic factors to identify high-risk areas and inform more effective conservation strategies for bottlenose dolphins in Malta's coastal waters.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107422"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812208","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":"Spatial and temporal distribution of mercury contamination in Bombay duck (Harpadon nehereus) from southeastern coastal China.","authors":"Feng Zeng, Ziqi Wang, Yuanyuan Liu, Bin Kang, Jiachen Sun","doi":"10.1016/j.marenvres.2025.107474","DOIUrl":"10.1016/j.marenvres.2025.107474","url":null,"abstract":"<p><p>China's southeastern coast, particularly Zhejiang, Fujian, and Guangdong, is rich in key fishery resources but also faces elevated contamination due to intensive industrial activity. The study investigated the spatial and temporal variations of mercury (Hg) in Bombay duck (Harpadon nehereus) collected from five coastal sites, the Yangtze River estuary, Hangzhou Bay, Wenzhou, Xiamen and Zhanjiang. The Hg levels and MeHg/THg ratios generally increased with decreasing latitude, with the highest Hg concentrations observed in Zhanjiang (THg: 0.2034 mg/kg, MeHg: 0.1778 mg/kg), significantly exceeding those at other sites. Weight-adjusted Hg levels showed a reversed trend between Zhanjiang and Hangzhou Bay, attributing mainly to the small fish size of the latter site, and support the need for site-specific monitoring. The monthly Hg concentrations and MeHg/THg ratios peaked in Xiamen in August, exhibiting seasonal variation patterns that correlated with monthly fluctuations in water temperature. Toxicity risk thresholds indicated that Bombay duck from Zhanjiang and Xiamen were at low to moderate risks, while Target Hazard Quotient (THQ) results suggested no potential health risks to humans from their consumption. Further ecotoxicological assessments are needed, along with investigations into the underlying mechanisms of the spatiotemporal variation in Hg methylation, assimilation and bioaccumulation.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107474"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144959252","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":"Homogeneous fish communities use intertidal salt marshes at high tide, despite environmental diversity: insights from a large-scale monitoring program on French coasts.","authors":"Loïc Baumann, Anthony Sturbois, Alexandre Carpentier, Aurélien Besnard, Nils Teichert, Sylvain Duhamel, Paméla Lagrange, Emmanuel Caillot","doi":"10.1016/j.marenvres.2025.107477","DOIUrl":"10.1016/j.marenvres.2025.107477","url":null,"abstract":"<p><p>Salt marshes have dramatically declined in area throughout history and are still subject to numerous anthropogenic pressures. These habitats appear essential for certain fish species, which use them in high abundances. Some studies suggested that fish habitat use of salt marshes could greatly depend on the condition of the vegetation and notably its management. However, most of these studies were restricted to limited numbers of sites or samples, making it difficult to confirm these assumptions. To meet this challenge, a large-scale, standardized and temporally coordinated monitoring program has been set up on a network of 18 salt marshes distributed over the French coasts of the English Channel and the Atlantic, with the aim of describing fish communities and identifying potential driving environmental factors of fish diversity and abundances. Creeks were environmentally characterized and sampled for fish in three seasons in 2015, 2017, 2019 and 2021. Fish captures were greatly variable in abundances among space and time, poorly diversified (≤10 species per sample), and largely dominated by mullets, gobies and seabasses. The abundances of the main fish taxa in the captures were poorly explained by the environmental variables considered. Overall, only seafront and salinity might have conditioned the occurrence and abundance of some species across the network. Our results emphasize the crucial importance of long-term, large-scale monitoring initiatives to deal with the inherent variability of fish community composition in salt marshes, and the need for further research to better understand the utilization of this habitat by fish.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107477"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144959670","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":"Differential timing in the use of the oceanographic features of the California current system by two pelagic seabirds.","authors":"Martha P Rosas-Hernández, Yuri V Albores-Barajas, Cecilia Soldatini, Carlo Catoni, Giacomo Dell'Omo, Niels Rattenborg","doi":"10.1016/j.marenvres.2025.107423","DOIUrl":"10.1016/j.marenvres.2025.107423","url":null,"abstract":"<p><p>The California Current System (CCS) is known for its extensive biodiversity along the western coast of North America. However, it remains difficult to understand the intricate relationship between environmental conditions within the CCS and the distribution patterns of species. This study focuses on two species of procellariform seabirds: the Black-vented Shearwater (Puffinus opisthomelas) and the Laysan Albatross (Phoebastria immutabilis). These bird species have different habitat preferences within the CCS: shearwaters prefer coastal areas, and albatrosses predominantly inhabit pelagic regions. However, there is limited knowledge about these species' foraging areas in the Mexican Pacific. To address this gap, we analyzed the movement tracks of Black-vented Shearwaters breeding on Natividad Island and Laysan Albatrosses breeding on Guadalupe Island throughout their breeding seasons. We used expectation-maximization binary clustering to identify the foraging areas of each species, and subsequently examined the oceanographic variables associated with these areas. The research revealed significant differences in the foraging environments of the two species. Shearwaters predominantly use coastal areas with higher temperatures and chlorophyll concentrations compared to the open ocean areas frequented by albatrosses for foraging. Furthermore, our research showed how important changes in the Ekman pumping rate are as a major factor affecting the presence of seabirds in their foraging areas, possibly acting as an early sign of the start of the food chain. These findings represent a notable advance in our understanding of the foraging habits of the Black-vented Shearwater and the Laysan Albatross. Furthermore, they highlight the critical importance of considering species-specific behaviors and conducting detailed investigations into various oceanographic phenomena that occur in foraging areas. These efforts will contribute to a broader understanding of the factors that shape each species' foraging areas.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107423"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144799551","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":"Foraminifera record historical coral-algal phase shifts on Caribbean coral reefs.","authors":"Akos Kalman, Alex F Humphreys, Zach Adams, Riley Ames, Angelique R Marín, Alex C Dempsey, Sam J Purkis","doi":"10.1016/j.marenvres.2025.107437","DOIUrl":"10.1016/j.marenvres.2025.107437","url":null,"abstract":"<p><p>Healthy Caribbean reefs are coral-dominated. When disturbed, however, they can slide into a degraded state, characterized by few live corals and abundant macroalgae. Timeseries collected by SCUBA divers are valuable in tracking these coral-algal phase shifts, but their temporal scope is typically limited to decades-insufficient to capture long-term ecosystem dynamics. To address this limitation, we integrate vintage aerial photography, fieldwork, and foraminiferal counts to develop a new bioindicator capable of identifying historical coral-algal phase shifts in eight Caribbean reef provinces. Our bioindicator leverages the contrasting life habits of two foraminifera genera: Archaias, which thrives in coral-dominated environments, but is replaced during a phase-shift by Quinqueloculina, which benefits from an algal canopy. This ecological bifurcation is excellently captured by the ratio in the abundance of these two genera in the seabed foraminiferal death assemblage, which is easily sampled. We propose that our new foraminiferal bioindicator provides a valuable tool for reconstructing the historical trajectories of Caribbean reefs, even in the absence of historical monitoring data.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107437"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812209","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":"Immersion exposure to okadaic acid triggers neurotoxic and hepatotoxic responses in zebrafish larvae (Danio rerio).","authors":"Piera Pepe-Vargas, Patricio Yañez-Bailey, Nicolas Zambrano, Javiera F De la Paz, Fernando Cruzat-Cruzat, Bernd Krock, Alejandra Llanos-Rivera","doi":"10.1016/j.marenvres.2025.107412","DOIUrl":"10.1016/j.marenvres.2025.107412","url":null,"abstract":"<p><p>Okadaic acid (OA) has the potential to induce sublethal effects during the early life stages of fish, which may negatively affect natural populations. The aim of this study was to evaluate the hepatotoxic and neurotoxic effects of OA in 5-day post-fertilization zebrafish (Danio rerio) larvae exposed to concentrations spanning environmentally relevant levels and mechanistically informative doses. Hepatotoxicity was assessed by quantifying lipid droplet size in the liver, while neurotoxicity was evaluated through locomotor activity assays under light-dark cycle conditions and through molecular analysis of acetylcholinesterase (ache) and myelin basic protein (mbp) gene expression. The results demonstrate that OA induces both hepatotoxic and neurotoxic effects following direct immersion exposure; however, the exposure times required to elicit significant responses differ between endpoints. Hepatotoxicity, characterized by macrovesicular steatosis, was evident after 24 h of exposure, whereas neurotoxicity was observed after 80 min. Specifically, larvae exposed to OA exhibited reduced locomotor activity (hypoactivity) compared to unexposed controls, a pattern consistent with previous reports of impaired swimming performance in adult fish following OA ingestion. Together, these findings suggest that chronic exposure to sublethal concentrations of OA during the larval stages may induce progressive multi-system damage, potentially compromising not only individual survival but also behavioral performance, with implications for population dynamics in natural environments.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107412"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144817071","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":"Genetic diversity and distribution patterns of Phaeocystis globosa in the eastern Chinese coastal seas: Significance of a global intraspecific re-examination.","authors":"Ling Xiang, Chao Liu, Qingchun Zhang, Junlan Huang, Jinxiu Wang, Rencheng Yu","doi":"10.1016/j.marenvres.2025.107473","DOIUrl":"10.1016/j.marenvres.2025.107473","url":null,"abstract":"<p><p>Phaeocystis globosa is broadly distributed across tropical and temperate oceans, exhibiting substantial genetic and phenotypic diversity. This species plays a critical role in the global carbon and sulfur biogeochemical cycles, and is associated with harmful algal blooms (HABs) in eutrophic waters, particularly in Southeast Asia and the North Sea. Although extensively studied in the South China Sea due to recurrent HAB events, its genetic diversity, geographic distribution and environmental adaptations remain poorly understood in other coastal regions of China. In this study, we investigated the genetic diversity and distribution patterns of P. globosa in the Bohai Sea (BS), Yellow Sea (YS), and East China Sea (ECS) during mid-March to late April and mid-October to early November 2021, using a high-resolution chloroplast marker rbcS-rpl27. Metabarcoding analyses identified seven distinct genotypes (Types I-VII), with Type IV corresponding to the \"giant-colony\" ecotype responsible for HABs along the Chinese coasts. Spatial-temporal distribution patterns indicated that Types III and VII dominated the BS and YS during spring under low-temperature conditions, while Type I prevailed in the warmer ECS during autumn. Notably, Type IV exhibited eurythermal adaptation, thriving in both seasons across a wide salinity range. Seawater temperature emerged as the primary driver of genotype distribution, while nutrient factors and salinity also contributed to niche partitioning during non-bloom periods. These findings suggest that the genetic diversity of P. globosa is structured by environmental variables, particularly temperature gradients, and underscore the importance of re-examining this organism and its blooms from an intraspecific perspective on a global scale.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107473"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144959595","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}