Marine environmental research最新文献

{"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}

{"title":"Exploring the multiple functions of polyphenols in Mediterranean macroalgae: insights, gaps, and future directions from a systematic review.","authors":"Ermenegilda Vitale, Rosa Donadio, Simonetta Fraschetti, Carmen Arena","doi":"10.1016/j.marenvres.2026.108244","DOIUrl":"10.1016/j.marenvres.2026.108244","url":null,"abstract":"<p><p>Macroalgae are a cornucopia of bioactive molecules whose synthesis is modulated in response to environmental variables, allowing macroalgal adaptation and survival. Among these metabolites, polyphenols are worthy of attention because they may represent an informative archive of environmental conditions, given their involvement in several ecological and biochemical functions. This systematic review synthesized the literature from the last two decades on phenolic compounds in Mediterranean macroalgae, focusing on their functional roles, taxonomic distribution, geographical occurrence, and responses to abiotic and biotic stressors, with particular attention to their potential as 'early indicators' of environmental change. Using a Scopus-based search strategy, nearly 6000 records were screened and studies on brown, red, and green macroalgae published between 2003 and September 2025 across the Mediterranean basin were retained. The reviewed literature highlighted that polyphenols are widely involved in antioxidant defense, photoprotection, stress tolerance, and interspecific interactions, supporting the resilience of macroalgae in a rapidly changing Mediterranean Sea. At the same time, the review emphasizes the significant biotechnological potential of these compounds in the pharmaceutical, cosmetic, food, and agricultural sectors. Overall, the evidence indicates that fluctuations in polyphenol content often reflect rapid physiological responses to environmental stress, suggesting that these compounds may function as early indicators of ecological change in Mediterranean macroalgae. Despite growing evidence, several important gaps remain. Research from the eastern Mediterranean basin is still limited, most studies focus on only a few model genera, and long-term field studies examining multiple environmental stressors are rare. Future research should therefore include a wider range of geographic areas and species, adopt standardized analytical methods, and investigate how polyphenols respond to combined environmental drivers. This would help clarify and validate their use as early indicators of ecological change.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108244"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148396835","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 \"ENSO-driven distribution shifts in the critically endangered Mustelus whitneyi along the Northern Peruvian Coast\" [Mar. Environ. Res. (220) 1-10 108187].","authors":"Juliana López-García, Andrés F Navia, Víctor Hugo Cruz-Escalona, Joanna Alfaro-Shigueto, Jeffrey C Mangel, Francisco Javier Urcádiz-Cázares, Carlos Yáñez-Arenas","doi":"10.1016/j.marenvres.2026.108268","DOIUrl":"10.1016/j.marenvres.2026.108268","url":null,"abstract":"","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":" ","pages":"108268"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148456227","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":"Environmental filtering and niche differentiation across global hermit crab lineages.","authors":"Lili Pelayo González, Guillermina Alcaraz","doi":"10.1016/j.marenvres.2026.108236","DOIUrl":"10.1016/j.marenvres.2026.108236","url":null,"abstract":"<p><p>Environmental niche structure across large spatial scales provides insight into the processes that shape species distributions in marine systems. Hermit crabs (Paguroidea) are widely distributed benthic crustaceans that occupy a broad range of habitats, from shallow coastal environments to the deep sea. In this study, we analyzed global patterns of habitat suitability and partial environmental niche differentiation among representative hermit crab genera from the families Diogenidae, Paguridae, and Parapaguridae. We obtained occurrence records from the Global Biodiversity Information Facility and aggregated them at the genus level. Genus level species distribution models were calibrated using correlative approaches and sea bottom environmental predictors, including bathymetry, temperature, salinity, pH, current velocity, and dissolved oxygen. We assessed environmental niche differentiation using a PCA framework and pairwise niche overlap metrics, while habitat suitability was evaluated using genus level species distribution models. Ensemble models showed high predictive performance across genera, and habitat suitability patterns were strongly structured by bathymetry and temperature. Hermit crab genera showed substantial environmental niche overlap, particularly among several Diogenidae genera and between the parapagurids. Notably, parapagurid genera were associated with deeper, colder, and lower pH benthic environments, whereas several Diogenidae genera occupied comparatively shallower and warmer environmental space. Pagurus showed comparatively greater environmental heterogeneity than most other genera. These differences may suggest differential sensitivity to future ocean conditions, with specialized taxa potentially more vulnerable than environmentally flexible genera. Integrating macroecological patterns with physiological constraints will be critical for anticipating how climate change may reorganize hermit crab assemblages.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108236"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148396907","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":"Sediment heterogeneity shapes benthic microbial community assembly and co-occurrence network organization in the East China Sea.","authors":"Lilian Wen, Jiajia Dai, Jinming Song, Xuegang Li, Huamao Yuan, Liqin Duan, Jun Ma","doi":"10.1016/j.marenvres.2026.108253","DOIUrl":"10.1016/j.marenvres.2026.108253","url":null,"abstract":"<p><p>Sediment microorganisms play important roles in coastal biogeochemical cycling, yet how sediment heterogeneity and coupled environmental gradients shape benthic microbial communities in marginal seas remains insufficiently understood. Here, we examined microbial communities in two contrasting sediment types from the East China Sea: fine-grained, organic-rich sediments (E1) and coarse-grained, organic-poor sediments (E2). We used an integrated approach to explore the relationships between sediment heterogeneity and microbial community composition, assembly processes, co-occurrence network organization, and functional potential. E2 showed higher α-diversity, broader niche breadth, and greater community heterogeneity than E1. Microbial community differentiation was jointly associated with sediment physicochemical properties, water-column conditions, and spatial/depth-related gradients. Community assembly analysis indicated that dispersal limitation was an important process in both sediment types, whereas E1 was more strongly influenced by drift and other stochastic processes and E2 exhibited relatively stronger heterogeneous selection. Co-occurrence network analysis revealed distinct network topologies: the E1 network was more modular and fragmented, whereas the E2 network was more connected and more dependent on connector nodes. PICRUSt2-inferred functional profiles suggested that core carbon-, nitrogen-, and sulfur-related pathways were broadly similar between E1 and E2, indicating potential functional redundancy. Meanwhile, E1 was associated with greater carbon-transformation potential, whereas E2 showed slightly higher potential for oxidative nitrogen transformation, particularly nitrification- and comammox-related pathways. Overall, sediment heterogeneity and coupled environmental gradients jointly shape benthic microbial community structure, assembly processes, network organization, and inferred functional potential in the East China Sea.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108253"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148405107","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":"Zooplankton as indicators of coastal water quality: a comparative study of PlanktonScope imaging and DNA metabarcoding of seawater and mesh-screened samples.","authors":"Yingbei Peng, Chun Ming How, Dai Liu, Dumas Deconinck, Mei-Hong Zhao, Jack Chi-Ho Ip, Leo Lai Chan, Hongsheng Bi, Jian-Wen Qiu","doi":"10.1016/j.marenvres.2026.108238","DOIUrl":"10.1016/j.marenvres.2026.108238","url":null,"abstract":"<p><p>Zooplankton serve as a vital link between primary producers and higher consumers and act as key indicators of aquatic environmental health. Traditional zooplankton monitoring methods are often time-consuming and labour-intensive, while eDNA metabarcoding and automated imaging systems offer promising alternatives. However, few studies have compared these methods, particularly regarding their sensitivity to small-scale spatial changes in zooplankton communities. Here, we compared the performance of PlanktonScope-an imaging system enabling in situ monitoring and identification of dominant plankton taxa-with eDNA metabarcoding of water and mesh-screened samples along a 20-km pollution gradient in Hong Kong. All three methods consistently detected a spatial gradient in the relative abundance of the dinoflagellate Noctiluca scintillans, jellyfish, and copepods. However, eDNA metabarcoding, especially from net samples, produced very few jellyfish reads, likely due to the fragility of their bodies. Within the eDNA results, Temora sp. And Parvocalanus crassirostris were dominant in the inner harbour, while Centropages typicus and N. scintillans prevailed in the outer harbour. Turbidity and orthophosphate phosphorus significantly influenced the abundance of several key taxa. Overall, our findings show that water- and net-based eDNA approaches provide comparable information on zooplankton diversity, capturing a broader range of taxa at finer taxonomic resolution, while PlanktonScope delivers high-resolution spatial and temporal data. Given the considerably lower workload involved, we recommend using automated imaging for the rapid assessment and monitoring of zooplankton taxa, and water-based eDNA metabarcoding for a deeper understanding of coastal zooplankton community dynamics.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108238"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148382371","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":"Regulation of short-lived halocarbon distributions and emissions by the Indonesian Throughflow in the Eastern Indian Ocean.","authors":"Jianlong Li, Shuying Zhang, Xing Zhai, Lin Du","doi":"10.1016/j.marenvres.2026.108222","DOIUrl":"10.1016/j.marenvres.2026.108222","url":null,"abstract":"<p><p>Short-lived brominated and iodinated methanes, such as bromoform (CHBr₃), dibromomethane (CH₂Br₂), and methyl iodide (CH₃I), have significant implications for the halogen cycle, atmospheric chemistry, and climate change. Despite their importance, the spatial variability and emission patterns of these halocarbons originating from unique marine environments remain poorly understood. Here, we investigate the response of CH₃I, CHBr₃, and CH₂Br₂ to physical and biological drivers in the Eastern Indian Ocean, a region significantly influenced by the Indonesian Throughflow (ITF). We observe that concentrations of CH₃I, CHBr₃, and CH₂Br₂ are significantly higher in the northern region than in the southern region within the ITF-influenced area, resulting in emission fluxes that are 1.5 to 2.0 times greater than those in the southern region. This enhanced emission is driven by the interaction between nutrients and biological processes. Such interplay is boosted by the warm ITF, with the most pronounced effects observed in the northern ITF-influenced regions. Additionally, we uncover that the nutrient supply at the convergence front of water masses, driven by eddies and upwelling, serves as a key driver for the production of CH₃I, CHBr₃, and CH₂Br₂. This research highlights the significant contribution of unique marine dynamic processes to atmospheric CH₃I, CHBr₃, and CH₂Br₂, thereby deepening our understanding of their oceanic releases and atmospheric budgets.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108222"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148382327","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":"The concurrent ecological role of eelgrass beds and on-bottom oyster farms driving community structure in two bays of Atlantic Canada.","authors":"Tyler J Power, K Devon Lynn, Melissa Fernández, Diego Quintanilla-Ahumada, Pedro A Quijón","doi":"10.1016/j.marenvres.2026.108243","DOIUrl":"10.1016/j.marenvres.2026.108243","url":null,"abstract":"<p><p>Marine sediments support distinct complements of epifaunal and infaunal assemblages, that often end up associated with the habitats created by ecosystem engineers. While human activity has caused the decline of many of these engineers, like seagrasses, it also accounts for the farming and growth of others, like oysters. This study assessed the contribution of natural eelgrass beds (Zostera marina), on-bottom Eastern oyster aquaculture (Crassostrea virginica), and bare sediments to the abundance and richness of epifaunal and infaunal communities in two bays of Prince Edward Island, Atlantic Canada. Our working hypothesis was that structured habitats (eelgrass and oyster leases) sustain richer or otherwise distinct communities relative to bare sediments. To test it, we sampled epifauna through multiple trapping surveys and then examined infaunal communities in the three habitats. Epifaunal surveys showed that eelgrass beds and oyster leases supported richer and more abundant communities than bare sediments. Multivariate analyses also showed that samples from the first two habitats differed from bare sediments in composition and abundance. Meanwhile, infaunal communities were denser but less diverse in bare sediments, with MDS plots evidencing clear among-habitat differences. These results supported our hypothesis and the notion that structurally complex habitats foster richer epifaunal and infaunal communities, likely by providing diverse shelter and resources. Despite their transitional nature, on-bottom oyster leases contributed to local community structure much like natural eelgrass beds, playing a concurrent ecological role. Hence, they provide services well beyond the economic benefits that they are best known for.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"220 ","pages":"108243"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148382291","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 \"Kelp forests as natural barriers against invasive turf-forming algae\" [Mar. Environ. Res. 220 (2026) 108160].","authors":"Nerea Alvite, Sara Barrientos, Rodolfo Barreiro, Cristina Piñeiro-Corbeira","doi":"10.1016/j.marenvres.2026.108178","DOIUrl":"10.1016/j.marenvres.2026.108178","url":null,"abstract":"","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":" ","pages":"108178"},"PeriodicalIF":3.4,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148194927","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}