Marine environmental research最新文献

{"title":"Organophosphate esters and phthalate esters in marine fishes from a coastal area of China: Occurrence, tissue distribution, trophic transfer, and human exposure","authors":"Zi-Han Su ,&nbsp;Can Wang ,&nbsp;Xue Zhou ,&nbsp;Ming-Jing He","doi":"10.1016/j.marenvres.2025.107135","DOIUrl":"10.1016/j.marenvres.2025.107135","url":null,"abstract":"<div><div>Concern over the influences of constant addition of anthropogenic chemicals to the marine environment has attracted public attention. Organophosphate esters (OPEs) and phthalate esters (PAEs) were two emerging chemicals frequently added to a variety of products as flame retardants and plasticizers. However, limited information is available associated with their environmental behaviors in marine environment, and the tissue-specific bioaccumulation and biomagnification of OPEs and PAEs in fish remain subjects of ongoing debate. Hence, 12 OPE and 6 PA E analogues were analyzed in five marine fish species from the coast of Wenchang, Hainan province. The concentrations of Σ₁₂OPEs and Σ₆PAEs were in the range of 319–1790 ng/g lw and 400–1370 ng/g lw, respectively. Significantly negative correlations (<em>p</em> value &lt; 0.05) were observed between the concentration of pollutants and their corresponding lipid contents of fish tissues. There were no obvious correlations between the logarithmic transformed concentrations of each OPE and PAE analogue with their corresponding Log <em>K</em>_OW value in fish tissues, but OPE and PAE concentrations were likely to reach the highest when Log <em>K</em>_OW values were around five. Significantly negative correlations (<em>p</em> value &lt; 0.05) were found between logarithmic transformed concentrations of TCEP, TCP and BBP along with δ¹⁵N values in fish species, except for TDCIPP, TEHP and DBP which exhibited an increasing trend with the increasing of δ¹⁵N values. Furthermore, human exposure via fish intakes was assessed, and EDI ranged from 73.9 to 1910 ng/kg bw/day for ∑OPEs and 495–4550 ng/kg bw/day for ∑PAEs, respectively, which were both within the safe dose threshold, and the HI values of ΣOPEs and ΣPAEs were much lower than the boundary value of 1.00. This study contributes valuable insights into OPEs and PAEs present in marine organisms as well as robust evidence indicating that most OPE and PAE analogues undergo trophic dilution within marine fish.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107135"},"PeriodicalIF":3.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785916","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":"Copper-induced microstructural alterations in the chitin-protein matrix and calcium dissolution in the exoskeletal carapace of the mud crab Scylla serrata","authors":"Anju Alagiri ,&nbsp;Janani Parthiban ,&nbsp;Anjana Ashok ,&nbsp;Thangabalu Subramani ,&nbsp;Meiyalagan Velayutham","doi":"10.1016/j.marenvres.2025.107142","DOIUrl":"10.1016/j.marenvres.2025.107142","url":null,"abstract":"<div><div>Understanding the exoskeletal microstructural alterations is important for assessing the broader implications of metal pollution on crustacean aquaculture systems. Through this investigation, we seek to contribute valuable insights into the harmful effects of copper pollution on <em>Scylla serrata</em> and inform better management practices in crustacean culture. Current study reveals that copper exposure induces calcium carbonate dissolution from the exoskeleton especially from the endocuticle and the subsequent irreversible microstructural alterations finally lead to the broken mode of the exoskeleton. The field emission scanning electron microscope (FE-SEM) images of copper exposed crab shells show that the reduction of the size of epicuticular spines (3 ± 1.23 μm), decreased surface roughness and the presence of arc or necking pattern of chitin fibers in the endocuticle were observed, indicating the loss of stiffness and structural integrity. The attenuated total reflectance fourier transform infrared spectrophotometer (ATR-FTIR), X-ray diffraction analysis (XRD) and energy dispersive X-ray analysis (EDX) confirmed that these alterations in crab shells are due to the calcium dissolution, copper incorporation and micro precipitation. These findings underscore the adverse effects of copper on the structural integrity of crab shells and provide crucial insights into understanding the need for improved practices to protect aquaculture systems from metal pollution.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107142"},"PeriodicalIF":3.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143790906","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":"Biogeochemistry of phosphorus species in water and sediments and sedimentary phosphorus release potential from a eutrophic estuary and adjacent bay","authors":"Ying Huang ,&nbsp;Cheng Xu ,&nbsp;Bin Yang ,&nbsp;Dongdong Zhu ,&nbsp;Zhiming Ning ,&nbsp;Dongliang Lu ,&nbsp;Jiaodi Zhou ,&nbsp;Haifang Huang ,&nbsp;Zhenjun Kang","doi":"10.1016/j.marenvres.2025.107134","DOIUrl":"10.1016/j.marenvres.2025.107134","url":null,"abstract":"<div><div>Phosphorus (P) is an essential macronutrient for sustaining primary productivity and regulating the biogeochemical cycles of key biogenic elements in estuarine ecosystems. Different P fractions in the water column and surface sediments were separated for understanding the distributions of dissolved and sedimentary P, and to evaluate the ecological risk, bioavailability and release potential of P in sediments of the Dafengjiang River Estuary (DRE) and adjacent Qinzhou Bay (QZB). The results showed that dissolved organic P was the dominant total dissolved P, which accounted for 54 ± 19 % and 60 ± 13 % in the surface and bottom seawater, respectively. Total P (TP) concentrations ranged from 6.36 to 24.13 μmol/g in the surface sediments, and predominantly consisting of inorganic P (IP). Fe bound P (Fe-P) was the dominant sedimentary IP fraction. The higher sedimentary TP concentrations and its enrichment index were observed in the DRE, implying high potential risk of eutrophication. The Langmuir crossover-type model was adopted to be suitable for the sediment sorption mechanism. The equilibrium P concentrations (EPC₀) ranged from 9.23 to 18.98 μmol/L, which were significantly higher than dissolved inorganic P concentrations (0.19–1.05 μmol/L) in the overlying water, suggesting that the surface sediments acted as P source for water column. The significant positive relationship between EPC₀ and exchangeable P and Fe-P contents indicated both P forms may have an important influence on the potential release of P from sediments. Native adsorbed P (NAP)/EPC₀ ratio ranged from 0.06 to 0.19 L/g, and was notably elevated in the QZB, implying a high sediment adsorption capacity for P within this bay. Overall, this study provided an important perspective for better understanding biogeochemistry of P species in water and sediments and sedimentary P release potential from eutrophic estuarine and coastal ecosystem, thereby making significant contributions to future policy formulation concerning effective nutrient management strategies.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107134"},"PeriodicalIF":3.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817464","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 experiments revealed different bleaching susceptibilities to heat stress in eight species of subtropical urban corals","authors":"Yip Hung Yeung ,&nbsp;Yanjie Zhang ,&nbsp;James Y. Xie ,&nbsp;Jian-Wen Qiu","doi":"10.1016/j.marenvres.2025.107132","DOIUrl":"10.1016/j.marenvres.2025.107132","url":null,"abstract":"<div><div>Understanding species' susceptibility to environmental stressors is crucial for conservation planning, but such data are unavailable for many subtropical corals. We therefore conducted 1-month laboratory experiments to determine the heat stress susceptibility of eight species from subtropical areas by exposing them to 32 °C (treatment) or 25 °C (control). Four species (<em>Dipsastraea rotumana</em>, <em>Echinophyllia aspera</em>, <em>Pavona decussata</em>, and <em>Platygyra carnosa</em>) survived the whole experiment, although bleaching occurred after one to two weeks of exposure. The heat exposure caused total mortality in the other four species: on day 2 in <em>Acropora solitaryensis</em>, day 7 in <em>Acropora digitifera</em>, day 9 in <em>Acropora pruinosa</em>, and day 17 in <em>Montipora peltiformis</em>. These results suggest that repeated heatwaves may cause changes in coral communities by causing disproportionally high mortality of heat-sensitive species. Coral species tested in this study, collected from subtropical reefs previously thought to be refuges for coral reefs under global warming, demonstrated greater susceptibility to heat stress than their tropical counterparts. This raises concerns about the persistence of coral reefs as sea surface temperatures continue to rise.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107132"},"PeriodicalIF":3.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artificial Light at Night (ALAN) alters the behavior and physiology of a sandy beach isopod. Are these effects reversible?","authors":"Valentina A. Galaz-Guajardo ,&nbsp;Diego Quintanilla-Ahumada ,&nbsp;Pedro A. Quijón ,&nbsp;Josué Navarrete-Meneses ,&nbsp;Nicole Jahnsen-Guzmán ,&nbsp;Cristián Miranda-Benabarre ,&nbsp;Nicol Zúñiga-Cueto ,&nbsp;José Pulgar ,&nbsp;Patricio H. Manríquez ,&nbsp;Cristian Duarte","doi":"10.1016/j.marenvres.2025.107130","DOIUrl":"10.1016/j.marenvres.2025.107130","url":null,"abstract":"<div><div>Artificial Light at Night (ALAN) is becoming a pervasive stressor in both terrestrial and marine habitats, posing a threat to species whose behavior and physiology rely on natural light/dark cycles. While numerous studies have examined the biological impacts of ALAN, far fewer have investigated the ability of organisms to recover from this stressor. This study used the sandy beach isopod <em>Tylos spinulosus</em> as a model species to assess the short-term effects of ALAN and its potential recovery following the removal of light sources. To achieve this, we conducted separate laboratory experiments to evaluate changes in locomotor activity, food consumption, food absorption efficiency, and growth rates under ALAN exposure and during recovery. We defined recovery as the state in which the measured responses statistically returned to control levels after deviating from those recorded for the same individuals under ALAN conditions. The results showed that ALAN had a detrimental effect on all four variables. While food consumption and growth returned to control levels after ALAN removal, activity and absorption efficiency did not, indicating a lack of recovery within the timeframe of the trials. These results suggest that the recovery of this species from short-term light pollution exposure is heavily dependent on the behavioral or physiological responses under examination. Hence, a broader range of responses over longer-term experiments are suggested to better understand the ability of this species to recover from light pollution at time scales relevant to management.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107130"},"PeriodicalIF":3.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143790908","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":"From subsea power cable to small-spotted catshark Scyliorhinus canicula: Behavioural effects of electromagnetic fields in tank experiments","authors":"Annemiek Hermans ,&nbsp;Ties Maris ,&nbsp;Jeroen Hubert ,&nbsp;Corentine Rochas ,&nbsp;Kevin Scott ,&nbsp;Albertinka J. Murk ,&nbsp;Hendrik V. Winter","doi":"10.1016/j.marenvres.2025.107127","DOIUrl":"10.1016/j.marenvres.2025.107127","url":null,"abstract":"<div><div>Subsea power cables are expanding in number and capacity due to increasing demand to transport offshore generated energy. Energy transported through a cable creates an electromagnetic field (EMF). Elasmobranchs are dependent on their perception of the earth's magnetic field and biologically induced electric fields, for orientation, navigation, locating conspecifics and detecting prey. EMF levels from subsea power cables will add to natural signals potentially disrupting elasmobranch perception, but the effects are not fully understood. Reported behavioural responses include attraction, disturbance, and indifference, varying with exposure type, level and experimental set-up. In this study, the effects of EMF on swimming behaviour of 14 individual small-spotted catshark <em>Scyliorhinus canicula</em> were studied. All sharks were exposed to field-relevant EMF gradients cables in three trials: 15.0 μT AC, 19.6 μT DC, and a control treatment. Sharks showed no startle response to EMF onset, did not alter movement towards or away from the cable, and crossed it as frequently as in control trials. Hidden Markov Models showed that behavioural states were best explained by EMF treatment, trial order and sex. Sharks showed 25 % less time transiting during DC trials when compared to AC and control trials. These findings indicate reason for further refined studies to better determine behavioural effects from direct current subsea power cables with <em>S</em>. <em>canicula,</em> for example using tagging studies. In addition, exploring effects on other species will help obtain a broader understanding of the potential impacts of EMF on benthic elasmobranchs.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107127"},"PeriodicalIF":3.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807556","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":"Lateral nitrogen input during summer in Sagami Sea with a deep trough enhances particulate organic carbon export","authors":"Yoshihisa Mino ,&nbsp;Chiho Sukigara ,&nbsp;Daisuke Takahashi ,&nbsp;Akihiko Morimoto","doi":"10.1016/j.marenvres.2025.107129","DOIUrl":"10.1016/j.marenvres.2025.107129","url":null,"abstract":"<div><div>In deep bays linked to the open ocean, efficient carbon sequestration occurs through the sinking of particulate organic matter produced in the euphotic zone. Nutrient conditions in the surface layer of temperate bays, which are crucial for particle production, are influenced by the lateral inflows of oligotrophic open water and freshwater containing terrestrial nutrients, in addition to seasonal mixing from below. This study, conducted through eight repeated observations in 2007–2008, investigated variations in surface water suspended particulate nitrogen (PN) isotope delta (δ¹⁵N) to examine upper layer PN and nutrient dynamics in Sagami Sea, located south of Tokyo Bay, with a seafloor depth exceeding 1500 m. While δ¹⁵N_PN showed seasonal variations, such as low in winter and high in summer, its horizontal distribution in summer closely correlated with a significant salinity variation, alongside PN concentration. Analysis of the negative δ¹⁵N_PN-salinity relationship, using a conservative mixing model with the offshore water and the low-salinity water as endmembers, revealed that N with a high δ¹⁵N was supplied to Sagami Sea through freshwater inflow from Tokyo Bay. This contributed on average 74 % of the summer suspended PN in coastal waters in Sagami Sea. The transport efficiency of this N input increases after heavy rain events, which greatly stimulates summer productivity in the bay. Consequently, summer N inputs may play a vital role in exporting particulate organic carbon to the mesopelagic zone and absorbing atmospheric carbon dioxide.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107129"},"PeriodicalIF":3.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling growth and carbon composition of macroalgae with different strategies under global change","authors":"Camino F. de la Hoz ,&nbsp;Paul R. Brooks ,&nbsp;Jennifer Coughlan ,&nbsp;Inés Mazarrasa ,&nbsp;Elvira Ramos ,&nbsp;Samuel Sainz-Villegas ,&nbsp;Araceli Puente ,&nbsp;Jose A. Juanes ,&nbsp;Tasman P. Crowe","doi":"10.1016/j.marenvres.2025.107128","DOIUrl":"10.1016/j.marenvres.2025.107128","url":null,"abstract":"<div><div>Marine macroalgae ecosystems are increasingly recognized as potential contributors to carbon sequestration within blue carbon strategies. This study investigates how the carbon storage capacity of two macroalgal species with different living strategies, <em>Fucus vesiculosus</em> (k-strategy, slow-growing) and <em>Ulva lactuca</em> (r-strategy, fast-growing), respond to the individual or combined impacts of two drivers of global change, eutrophication and marine heatwaves. Differences in growth, biomass and carbon accumulation were assessed after 7 and 14 days in two experiments (field and laboratory) that tested different combinations of nutrient enrichment (increase nutrient/surface area of 1 g/cm² in the field experiment and a concentration of 10 ml/l of Provasoli solution in the laboratory) and warming (5 °C increase) treatments. Results revealed that nutrient addition treatments had significant effects, reducing carbon incorporation by up to 22.5 % in <em>F. vesiculosus</em> compared to control. This reduction was particularly evident in the field experiment, suggesting that eutrophication negatively impacts the carbon storage potential of this slow-growing species. However, <em>F. vesiculosus</em> demonstrated greater resilience in maintaining biomass stability, whereas <em>U. lactuca</em> exhibited reduced growth and carbon accumulation under natural conditions. These findings highlight species-specific differences in carbon assimilation and biomass composition among macroalgae, which can influence their potential contribution to carbon cycling and storage in marine ecosystems, shaped by their ecological and physiological traits, and emphasize the importance of nutrient management for optimizing blue carbon storage. This research contributes to our understanding of macroalgae's role in climate mitigation and underscores the need for targeted conservation strategies to enhance their ecosystem services.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107128"},"PeriodicalIF":3.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Marine Heatwaves on Carcinus maenas Crabs: Physiological and Biochemical Mechanisms of Thermal Stress Resilience","authors":"Federica Arrigo ,&nbsp;Marta Cunha ,&nbsp;Hugo Vieira ,&nbsp;Amadeu M.V.M. Soares ,&nbsp;Caterina Faggio ,&nbsp;Ximena González Pisani ,&nbsp;Laura López Greco ,&nbsp;Rosa Freitas","doi":"10.1016/j.marenvres.2025.107126","DOIUrl":"10.1016/j.marenvres.2025.107126","url":null,"abstract":"<div><div>Marine heatwaves (MHWs), characterized by prolonged periods of elevated sea temperatures, pose significant threats to marine ecosystems, particularly affecting the physiology and behavior of marine organisms, including crustaceans. This study investigates the physiological and biochemical responses of males and females of <em>Carcinus maenas</em> crabs, after an acute exposure to an MHW, focusing on energy metabolism, oxidative status, and potential neurotoxicity. Specimens were exposed to controlled laboratory conditions simulating a temperature increase from 17 °C to 23 °C, and responses were analyzed in gills and hepatopancreas. Results revealed sex-specific differences in thermal stress resilience, with males showing higher glycogen storage in gills after MHW exposure, while females exhibited a significant reduction in glycogen reserves and an increase in antioxidant enzyme activity. Superoxide dismutase and glutathione reductase activities were notably elevated in females subjected to MHW, suggesting a more robust antioxidant response to counteract oxidative stress. Additionally, acetylcholinesterase activity, an indicator of neurotoxicity, was significantly reduced in females post-MHW, hinting at potential neurotoxic effects. Despite these biochemical changes, lipid peroxidation levels remained stable across both sexes and tissues, indicating that short-term MHW exposure did not cause significant oxidative damage to cell membranes. This study highlights the importance of considering sex differences in assessing the impacts of climate change-induced stressors on marine organisms, as males and females display distinct metabolic and physiological strategies for coping with thermal stress.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107126"},"PeriodicalIF":3.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807557","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":"Harpagifer bispinis, but not Patagonotothen tessellata, appears robust to interactive effects of ocean warming and acidification in southern Patagonia","authors":"Eloísa M. Giménez ,&nbsp;Fabián A. Vanella ,&nbsp;Laura I. Wolinski ,&nbsp;Rodrigo Torres ,&nbsp;María E. Lattuca","doi":"10.1016/j.marenvres.2025.107123","DOIUrl":"10.1016/j.marenvres.2025.107123","url":null,"abstract":"<div><div>Ocean warming and acidification challenge marine ectotherms with rapid, multiple and simultaneous environmental changes. As knowledge of these impacts on fish from the sub-Antarctic is scarce, this study seeks to explore the combined effects of warming and acidification on the thermal and metabolic responses of <em>Patagonotothen tessellata</em> and <em>Harpagifer bispinis</em>, two sympatric notothenioid fish from the Beagle Channel. Juveniles were exposed to present-day and near-future summer temperatures (∼10 and 13 °C) and <em>p</em>CO₂ levels (∼500 and 1300 μatm) in a full factorial design. Their critical thermal minimum/maximum (CTmin/CTmax) were assessed and their partial thermal tolerance polygons were estimated. Oxygen consumption rates allowed us to calculate fish' aerobic scope (AS) as the difference between the standard and maximum metabolic rates (SMR and MMR). The CTmin of both species were affected by temperature, <em>p</em>CO₂ level and their interaction, while the CTmax of <em>P. tessellata</em> was affected by both factors and that of <em>H. bispinis,</em> only by temperature. The partial thermal tolerance polygon of <em>P. tessellata</em> significantly decreased with future <em>p</em>CO₂ levels, while no changes were observed for <em>H. bispinis</em>. In <em>P. tessellata</em>, SMR and MMR were affected by temperature and <em>p</em>CO₂ levels and the AS by their interaction. Conversely, <em>H. bispinis</em> showed no differences in SMR, MMR and AS under different conditions. The increase in SMR and decrease in AS of <em>P. tessellata</em> with future temperatures and <em>p</em>CO₂ levels may explain the changes in its thermal tolerance, while for <em>H. bispinis</em>, either the species has a greater capacity to adapt its metabolic response to warming and acidification, or different physiological processes are responsible for the observed changes in its thermal tolerance. Overall, present information could be a valuable tool for forecasting shifts in habitat suitability across the distribution range of both species and other similar fish in the context of climate change.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"208 ","pages":"Article 107123"},"PeriodicalIF":3.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739321","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}