Marine environmental research最新文献

{"title":"Local and non-local energy transfers in eddy-mean flow interactions along the Indonesian throughflow.","authors":"Yuxuan Li, Dezhou Yang, Kun Zhang, Lingjing Xu, Xuan Cui, Baoshu Yin","doi":"10.1016/j.marenvres.2026.108478","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108478","url":null,"abstract":"<p><p>How local energy conversion and non-local redistribution jointly shape eddy activity along the Indonesian Throughflow (ITF) remains unclear. Using long-term, eddy-resolving ocean model output, we diagnose exchanges among mean and eddy kinetic and available potential energy along the ITF and its adjacent basins. The results reveal a marked change in the dominant energy pathway. At the Pacific entrance and along the western ITF, eddies gain energy primarily through barotropic conversion associated with the sheared mean current. Farther downstream, baroclinic conversion becomes more prominent near the Indian Ocean exit, where horizontal density contrasts favor the transfer of mean available potential energy into eddy energy. Local conversion alone does not explain these regional patterns. Non-local kinetic energy transfer diverges in the Pacific source region and converges along the western pathway, consistent with energy redistribution toward the Sulawesi Sea. Near the Indian Ocean exit, non-local potential energy transfer accompanies enhanced baroclinic conversion. Together, these findings show how local eddy generation and non-local energy redistribution vary along the ITF, from a predominantly shear-associated kinetic energy pathway upstream to a more prominent potential energy pathway downstream. This study provides the quantification of inhomogeneous local versus non-local eddy-mean flow interactions along the entire ITF pathway, providing a fundamental insight for understanding mixing in this climatically and biologically critical oceanic region.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"222 ","pages":"108478"},"PeriodicalIF":3.4,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149220273","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":"Ecological responses of coastal benthic macrofauna to phosphogypsum industrial waste in the Gulf of Gabès (central Mediterranean Sea).","authors":"Nawfel Mosbahi, Mohamed Moncef Serbaji, Jean-Philippe Pezy, Lassad Neifar, Jean-Claude Dauvin","doi":"10.1016/j.marenvres.2026.108473","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108473","url":null,"abstract":"<p><p>The Gulf of Gabès is subject to intense anthropogenic pressure, mainly from coastal urbanization and phosphate industry activities, including phosphogypsum and effluent discharges. The present study investigated the response of macrobenthic communities to uncontrolled phosphogypsum effluents in the coastal zone of Gabès, based on a two-year seasonal monitoring survey. Twenty sampling stations located downstream from major potential pollution sources were monitored seasonally. A total of 182 macrobenthic taxa were identified, belonging to eight animal phyla and 104 families. Crustaceans (38.5%), molluscs (31%) and polychaetes (18.5%) were the most dominant groups. Statistical analyses, including ANOVA and cluster analysis, revealed a clear spatial gradient in community structure, influenced by both environmental variables and anthropogenic stressors. Inner stations, closer to industrial effluents, showed the lowest taxonomic richness and abundance, associated with high levels of heavy metals and organic enrichment, while offshore stations exhibited the highest values. Univariate diversity metrics demonstrated a general trend of increasing species diversity with distance from the pollution source. Polluted stations were predominantly colonized by carnivorous and selective deposit-feeding taxa, whose distribution appeared more strongly driven by trophic resource availability than by direct pollution stress. Seasonal variations in faunal abundance, diversity, and community composition were largely attributed to the biological cycles of the dominant species. The multiple biotic indices (AMBI, M-AMBI, BO2A, and BENTIX) classified the coastal ecological status from poor to good, following the spatial pollution gradient. This study underscores the importance of two-year investigation for improving understanding of benthic community dynamics and to support effective management and conservation strategies in this disturbed central Mediterranean ecosystem.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"222 ","pages":"108473"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149216369","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":"Unraveling growth, physiological, and transcriptomic responses to iron speciation in the red macroalga Pterocladiella capillacea: Insights into bioavailability and stress adaptation.","authors":"Jia-Bao Zhao, Xiang Zhao, Qi Zhao, Lu-Yao Li, Yan-Ning Gao, Pei-Dong Zhang","doi":"10.1016/j.marenvres.2026.108472","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108472","url":null,"abstract":"<p><p>Iron (Fe) is a critical trace element that plays a central role in marine biogeochemical cycles; however, the specific mechanisms by which different iron species influence macroalgae remain poorly understood. In this study, the economically important red alga Pterocladiella capillacea was exposed to four iron species-Fe(II), Fe(III), Fe(II)-EDTA, and Fe(III)-EDTA-at equivalent concentrations over a 28-day period. Growth performance, physiological biomarkers, and transcriptomic profiles were systematically integrated to elucidate species-specific response mechanisms. The results demonstrated that Fe(II)-EDTA served as the most effective iron source, significantly enhancing relative growth rates and promoting the accumulation of photosynthetic pigments. In contrast, inorganic Fe(III) exhibited markedly lower bioavailability under the present experimental conditions, leading to pronounced oxidative stress, as evidenced by chlorophyll and carotenoid degradation, elevated activities of antioxidant enzymes, and increased lipid peroxidation. Transcriptomic profiling of 15 samples (five treatments × three biological replicates, day 28) identified 2011 commonly differentially expressed genes (DEGs). Notably, the Ribosome and Phagosome pathways were significantly enriched across all treatments, indicating a conserved adaptive response centered on enhanced protein synthesis and lysosome-mediated cellular component turnover. Weighted gene co-expression network analysis (WGCNA) further identified hub genes functionally linked to translation elongation (eEF1A1) and energy metabolism (IDH2, UQCRB) as key contributors to growth performance under iron-sufficient conditions; conversely, genes associated with protein degradation (UBA52) and intracellular transport (SEC61G) were predominantly upregulated under Fe(III)-induced stress. Together, these integrated physiological and transcriptomic findings establish that iron speciation critically governs functional outcomes in macroalgae, with direct implications for optimizing seaweed aquaculture practices and informing ecological restoration strategies in coastal ecosystems characterized by spatially and temporally variable iron bioavailability.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"222 ","pages":"108472"},"PeriodicalIF":3.4,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149216390","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":"Living on the edge: Host and habitat-associated symbiodiniaceae dynamics in corals of the World's hottest sea (the Persian Gulf).","authors":"Sara Asadi Gharabaghi, Olivier Collard, Jean-François Flot, Radhouan Ben Hamadou, Marwa Beji, Mohammad Reza Shokri","doi":"10.1016/j.marenvres.2026.108464","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108464","url":null,"abstract":"<p><p>Coral persistence in the environmentally extreme Persian Gulf is strongly influenced by associations with Symbiodiniaceae, yet the relative importance of host identity, geography, depth, and season in structuring these symbioses remains incompletely understood. This study characterized Symbiodiniaceae communities associated with four coral species (Porites harrisoni, Platygyra daedalea, Acropora downingi, and Acropora microphthalma) from Kish Island (Iran) and Sheraoh Island (Qatar) during winter and summer 2023. Community diversity was examined across locations, depths, and seasons using Oxford Nanopore sequencing of the internal transcribed spacer 2 (ITS2) region. This study combines a multi-factorial sampling design spanning coral host species, geographic sites, depths, and seasons with Oxford Nanopore long-read ITS2 sequencing to characterize Symbiodiniaceae communities in the Persian Gulf. ITS2 sequences successfully assigned to known Symbiodiniaceae types were recovered from 42 coral colonies, yielding 13 dominant sequence types belonging primarily to C- and D-type lineages. Community composition differed significantly among coral species and locations, whereas seasonal and depth effects were detected only within some host species. Acropora microphthalma showed no statistically significant seasonal variation in ITS2 composition and remained D-type-dominated in both seasons, a pattern consistent with relative stability of the dominant Symbiodiniaceae community. A. downingi showed a non-significant trend toward greater C-type representation in summer. Porites harrisoni and Platygyra daedalea displayed spatial variation, with D-type symbionts dominating communities in Kish but C-type profiles prevailing in Sheraoh colonies (location and depth are confounded for P. harrisoni). These results document diverse host- and habitat-associated Symbiodiniaceae community patterns in corals inhabiting extreme environmental conditions. The findings indicate that Symbiodiniaceae diversity in the Persian Gulf cannot be explained by a single thermotolerant lineage. Host identity and local conditions particularly geographic site differences were important structuring factors in this dataset, though depth effects could not be disentangled from location for P. harrisoni. These findings highlight diverse host- and habitat-associated Symbiodiniaceae communities in one of the world's most environmentally extreme reef ecosystems.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"222 ","pages":"108464"},"PeriodicalIF":3.4,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149220302","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":"Occurrence, polymer composition, and polymer-specific ecological and human health risks of microplastics in the Sundarbans mangrove ecosystem, Bangladesh: An integrated multi-compartment assessment.","authors":"Md Ali Hossain Shamim, Jun Wang, Kazi Belayet Hossain, A B M Sadique Rayhan, Md Mazharul Islam, Hongwei Ke, Chunhui Wang, Minggang Cai","doi":"10.1016/j.marenvres.2026.108471","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108471","url":null,"abstract":"<p><p>Microplastic (MP) pollution poses an increasing threat to mangrove dominated estuarine systems, yet comprehensive multi-compartment assessments remain limited in South Asia. However, comprehensive MP assessments linking sources, transport, and risks remain scarce in South Asian mangrove ecosystems. This study investigated the occurrence, characteristics, sources, and risks of MPs in surface water, sediment, fish, and shrimp from three brackish rivers (Pasur, Kholpetua, and Rai) and adjacent shellfish farms within the Sundarbans mangrove ecosystem, Bangladesh. MP concentrations ranged from 50 to 480 items/m³ in water and 58.55-269.25 items/kg in sediment, with the highest contamination consistently observed in the Pasur River, reflecting intense anthropogenic pressure near the Mongla port region. MPs were detected in all fish (100%) and 93% of shrimp samples, predominantly as fibers (>90%), with gills and gastrointestinal tracts (GIT) showing higher burdens than muscle tissues. Fourier-transform infrared spectroscopy (FT-IR) identified nylon, polypropylene (PP), polyethylene (PE), and polyvinyl chloride (PVC) as the dominant polymers, indicating inputs from fishing gear, textile waste, industrial effluents, and domestic discharge. Bioaccumulation analysis revealed species-specific differences, with Polynemus paradiseus exhibiting the highest accumulation potential. Ecological risk indices (PLI, PHI, and PRI) indicated moderate to high pollution risk at several sites, while estimated annual intake values suggested potential human exposure concerns, particularly for children. Overall, these findings provide a monsoon-season snapshot of MP contamination, offering baseline insights into its distribution, transport, and associated ecological and human health risks in the Sundarbans. As sampling was conducted over a short period, the results should not be considered annual baselines. Long-term seasonal monitoring, along with improved waste management and industrial regulation, is needed to assess temporal variability and establish reliable ecosystem baselines.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"222 ","pages":"108471"},"PeriodicalIF":3.4,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149216448","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":"Laboratory and field studies of oil biodegradation in natural seawater.","authors":"Odd G Brakstad, Ida B Øverjordet, Sigrid Hakvåg, Hendrik Langeloh, Synnøve Lofthus","doi":"10.1016/j.marenvres.2026.108447","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108447","url":null,"abstract":"<p><p>Data from 21 laboratory and field studies of petroleum oil biodegradation in natural seawater (SW) were compared in this study. The studies were performed in SW from temperate and Arctic regions over a period over nearly 30 years. Six crude oils and an ultra-low sulphur fuel oil were included, while both local (Trondheimsfjord, Norway) and non-local (Northern Norway, Svalbard and Western Greenland) seawaters were used as microbial inocula. Different experimental systems were included in the studies, and saturated (C10-C36) and aromatic (monoaromatic and 2- to 5-ring polyaromatic carbons) oil compound groups and target analytes quantified by gas chromatographic analyses. Biodegradation rates and degradation half-life times were determined by first-order rate calculations. The effects of several variables on biodegradation rates were compared, including SW temperatures, oils, experimental laboratory systems, and differences between laboratory and field data. Significant differences were shown between degradation rates of targeted analytes, but not between oil compound groups, when dispersed oil and water-accommodated fractions, and dispersed and immobilized oils, were compared. Despite differences in oil properties, biodegradation rates were comparable between the oils. Impacts of SW temperatures were more pronounced in laboratory than in field experiments. The compiled data from all these studies emphasized the need for performing biodegradation studies at ambient seawater temperatures.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"222 ","pages":"108447"},"PeriodicalIF":3.4,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149220149","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":"Evidence of microplastic ingestion in ringed seals (Pusa hispida) from the Canadian Arctic.","authors":"Haylee I Hatton, Brynne Radford, Steven H Ferguson, Magali Houde, Liisa M Jantunen, Matthew S Ross","doi":"10.1016/j.marenvres.2026.108456","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108456","url":null,"abstract":"<p><p>Ringed seals (Pusa hispida) play a crucial role in Arctic marine food webs, serving as predators of fish and invertebrates, and as prey for polar bears (Ursus maritimus). They are also a critical food source for Inuit subsistence. However, there is limited data on microplastic accumulation in Arctic pinnipeds, including ringed seals. To better understand the extent of ingestion and potential accumulation of microplastics in ringed seals from the Canadian Arctic, 30 ringed seal stomachs were collected in collaboration with Inuit Hunters from Arviat and Resolute Bay, Nunavut, Canada, in 2021. All suspected microplastics underwent analysis by Raman microspectroscopy to identify polymer type, and all identified microplastics were counted and categorized based on size, color and morphology. Microplastics were present in 23 out of 30 (77%) seal stomachs, with abundances ranging from 0 to 6 particles per seal (mean = 2.0 ± 1.6 pcs/seal). Fragments were the most prevalent morphology identified (55%), followed by fibers (42%) and films (3.3%). Most particles were unidentified anthropogenic particles and polyester fibers. Microplastic abundances were similar between sexes and between seals collected from the two locations, and no relationships were found between microplastic abundances and age or any morphometric measurements. This study provides new data confirming the presence and characteristics of microplastics ingested by ringed seals harvested in Arviat and Resolute Bay, Nunavut, Canada, and provides baseline information for future plastic pollution monitoring programs in the region.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"222 ","pages":"108456"},"PeriodicalIF":3.4,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149216396","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 \"In vitro exposure to environmentally relevant concentrations of norgestrel affects sperm physiology and reproductive success of the Pacific oyster Crassostrea gigas\" [Mar. Environ. Res. 186 (2023) 105938].","authors":"Shuhao Xu, Weijun Wang, Bingqing Xu, Xin He, Zhixu Chen, Xiaoran Zhao, Yifei Zhang, Shuyu Zhou, Yan Fang, Qing Wang","doi":"10.1016/j.marenvres.2026.108369","DOIUrl":"https://doi.org/10.1016/j.marenvres.2026.108369","url":null,"abstract":"","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":" ","pages":"108369"},"PeriodicalIF":3.4,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148829536","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":"Metabolic trade-offs shape acute thermal responses in the marine predator Rapana venosa.","authors":"Wei-Jia Xu, Jie Wang, Yun-Wei Dong","doi":"10.1016/j.marenvres.2026.108249","DOIUrl":"10.1016/j.marenvres.2026.108249","url":null,"abstract":"<p><p>Ocean warming poses disproportionate threats to active marine predators due to their high metabolic demands. However, the coordinated survival strategy centered on energy adjustment they adopted remains unclear. Here we investigated thermal responses of the predatory gastropod Rapana venosa by integrating metabolic rate measurements with tissue-specific transcriptomics across ecologically relevant temperatures (20-35 °C). Standard metabolic rate exhibited a unimodal curve, peaking at the current summer extreme of 29 °C, and declining sharply at higher temperatures, indicating a narrow thermal performance window. Transcriptomic analyses revealed severity-dependent, hierarchical activation of cellular stress responses: moderate heat (29 °C) primarily induced heat shock proteins (e.g., hsp70, hsp90), whereas severe stress (35 °C) engaged anti-apoptotic pathways. Concurrently, key genes governing gluconeogenesis, lipogenesis, and ATP hydrolysis were progressively downregulated, reflecting strategic reallocation of energy from growth/maintenance to survival. Tissue-specific responses diverged as gills mounted aggressive oxidative defense and apoptosis regulation, while foot muscle conserved energy through metabolic suppression and prioritized protein-folding machinery. This functional division optimizes resilience but creates a critical decoupling: aerobic scope contraction at 29-32 °C combined with locomotor tissue metabolic suppression mechanistically suggest impairment of foraging and escape, consistent with published data showing feeding performance declines above 30 °C, before physiological failure above 35 °C. Our findings underscore the vulnerability of metabolically demanding predators to future ocean warming and emphasize the need to consider both physiological and molecular signatures of performance decline when predicting climate change impacts on marine food webs.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108249"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148412498","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-temporal distribution differences of nitrogen and phosphorus nutrients and potential eutrophication assessment in the Pearl River Estuary.","authors":"Yukun Pan, Hui Zhao, Liwei Sun","doi":"10.1016/j.marenvres.2026.108246","DOIUrl":"10.1016/j.marenvres.2026.108246","url":null,"abstract":"<p><p>Estuaries serve as critical land-sea interfaces with high ecological and socioeconomic value, yet they are increasingly threatened by excessive anthropogenic nutrient inputs due to rapid urbanization and industrialization. These inputs have intensified eutrophication, harmful algal blooms, and hypoxia in estuarine systems globally. The Pearl River Estuary (PRE), southern China's largest estuary, receives substantial nutrient loads from both riverine discharge and intense human activities in the highly urbanized Pearl River Delta. Using long-term monitoring data (2017-2024), this study systematically investigated the spatiotemporal distributions of dissolved inorganic nitrogen (DIN), reactive phosphate (PO₄-P), and dissolved oxygen (DO) in the PRE and assessed the eutrophication status. Results show a persistent nutrient regime characterized by nitrogen enrichment and phosphorus limitation. DIN distribution shows a strong correlation with river discharge, which appears to be an important factor controlling its large-scale land-sea decreasing gradient, with no pronounced east-west differentiation. In contrast, PO₄-P showed an \"east-high, west-low\" pattern, linked to coastal anthropogenic inputs and regional hydrodynamics. DO dynamics are regulated by phytoplankton photosynthesis, organic matter mineralization, water temperature, and freshwater runoff, resulting in seasonal and spatial variability. Heterogeneity was observed in nutrient limitation and eutrophication status across seasons and regions, where eutrophication in the inner estuary has been alleviated yet remains severe. This study systematically synthesizes eight years of spatiotemporal dynamics of nutrients and DO across the PRE. The integrated findings provide scientific support for developing regionally differentiated nutrient management frameworks, and have important guiding implications for alleviating eutrophication and seasonal hypoxia in large estuary ecosystems.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108246"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148391286","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}