Marine environmental research最新文献

{"title":"Centennial-scale water level fluctuations driven by land-sea interactions: diatom evidence from a coastal lagoon in South China","authors":"Yupei Zhang ,&nbsp;Yan Li ,&nbsp;Hanbiao Xian ,&nbsp;Helen Bennion ,&nbsp;Xuhui Dong","doi":"10.1016/j.marenvres.2025.107686","DOIUrl":"10.1016/j.marenvres.2025.107686","url":null,"abstract":"<div><div>Regional sea-level changes pose challenges to coastal environmental management, yet long-term records on such changes remain scarce for many coastal areas. Coastal lagoons, as dynamic interfaces between terrestrial and marine systems, are particularly sensitive to sea-level fluctuations. In this study, we aimed to reconstruct historical water depth changes in Pinqing Lagoon, a typical subtropical coastal lagoon in South China, using sedimentary diatoms as bioindicators. Statistical analysis of surface diatom communities and environmental parameters identified water depth as the primary driver for diatom distribution. A weighted averaging partial least squares (WA-PLS) transfer function (R² = 0.82; RMSE = 0.09) was developed and applied to a 150-year sediment core PQ2 to reconstruct past water level changes. The reconstruction revealed three distinct phases: (1) water depth declined from 2.85 m in the 1860s to 1.06 m in the 1940s (mean 2.31 m), driven by sandspit development and progressive semi-enclosure of the lagoon; (2) a rapid rise of water level in the 1940s−2010s (mean 2.50 m) was consistent with regional sea-level trends; (3) the lagoon was being shallower due to siltation and pollution in post-2010 phase. This study provides the first quantitative diatom-based water depth reconstruction for coastal lagoons in South China. Beyond documenting local hydrological changes, our findings offer palaeoenvironmental insights into regional sea-level dynamics, historical land–sea interactions, and human–environment feedbacks over the past century. The results also support long-term environmental monitoring and provide valuable guidance for adaptive coastal management under the combined pressures of sea-level rise and human disturbance.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107686"},"PeriodicalIF":3.2,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145513262","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":"Contrasting benthic exports of dissolved carbon and alkalinity from degradation of bloom-forming macroalgae (Ulva prolifera) in muddy versus sandy sediments of coastal sea: Insights from experimental incubations","authors":"Qing-Qing Li,&nbsp;Yu Gan,&nbsp;Zhi-Hao Gou,&nbsp;Jian-Hua Ren,&nbsp;Tie Li,&nbsp;Mao-Xu Zhu","doi":"10.1016/j.marenvres.2025.107685","DOIUrl":"10.1016/j.marenvres.2025.107685","url":null,"abstract":"<div><div>Although the degradation of common marine macroalgae in various environments has been extensively studied, the process for bloom-forming macroalgae (<em>Ulva prolifera</em>) buried in coastal sediments, and its implications for dissolved carbon cycling and aquatic biogeochemistry, have not been well documented. This study experimentally investigated <em>U. prolifera</em> degradation in muddy sediments via sediment core incubations under varying water-exchange conditions, with the objective of systematically comparing macroalgae degradation kinetics and benthic exports of dissolved organic/inorganic carbon (DOC/DIC) and total alkalinity (TA) with previous experimental results from sandy sediments under comparable conditions. Results revealed significantly faster degradation of <em>U. prolifera</em> in muddy sediments with rate constants 2.3–3.0 times higher than in sandy sediments. Muddy sediments exported lower (4 %–10 % of biomass carbon loss) and less labile DOC than sandy systems (26 %–60 %). However, they exhibited 7.3–11 times higher DIC and TA exports and significantly higher CO₂ degassing (<em>p</em>CO₂ &gt;4800 μatm). This shift from DOC to DIC/TA/CO₂ exports reflects enhanced anaerobic mineralization of DOC due to higher microbial abundance in cohesive muddy sediments. Additionally, it is inferred that the substantially lower benthic efflux of inorganic reductants and labile DOC from muddy sediments may result in significantly lower overlying-water oxygen demand compared to sandy systems. These findings highlight the contrasting biogeochemical impacts of <em>U. prolifera</em> degradation in the two contrasting sediment systems on metabolite exports, underscoring the importance of sediment texture in shaping the fate of macroalgal carbon within coastal carbon cycling.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107685"},"PeriodicalIF":3.2,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145534489","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":"Towards sustainable oyster farming: A field-based modeling approach in Hong Kong","authors":"Mohamed Madhar Fazil Sheik Oli ,&nbsp;AU Wai-yin ,&nbsp;Yuan Meng ,&nbsp;Basanta Pravas Sahu ,&nbsp;Vengatesen Thiyagarajan","doi":"10.1016/j.marenvres.2025.107678","DOIUrl":"10.1016/j.marenvres.2025.107678","url":null,"abstract":"<div><div>Oysters are essential nutrient-rich carbon neutral seafood delicacy for growing middle-class population, therefore, its expansion to new culture areas is important for securing seafood supply security. Notably, the demand for cultured Hong Kong (HK) oysters (<em>Crassostrea hongkongensis</em>) has recently increased due its added nutritional and taste related values However, increasing HK oyster production is becoming challenging as the optimal low salinity estuarine areas for HK oyster growth are threatened by pollution and land reclamation. When the aquaculture zone is moved away from the low salinity estuaries to high salinity coastal areas (with relatively less algal productivity), increase in salinity and changes in many other environmental factors becomes a primary abiotic stress to these oysters. This study assessed the growth and survival rates of Hong Kong oysters across three distinct aquaculture environments to identify the environmental factors that promote high growth yield and low mortality, using Hong Kong's 700-year-old estuarine oyster farming ecosystem as a model. Specifically, a full factorial, central composite design (CCD) with four variables including salinity, chlorophyll, dissolved oxygen, and nitrites was used to evaluate oyster growth and survival. Results indicated that salinity and chlorophyll were the major influencing factor, and the model predicted a maximum incremental growth up to 9.128 % per month and survival of 100 % under optimized conditions in Hong Kong's Deep Bay. Furthermore, this study provides a scientific basis for the adaptive practices adopted by locals, informing the government's management and future development plans in Deep Bay, ultimately enhancing sustainable oyster cultivation.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"214 ","pages":"Article 107678"},"PeriodicalIF":3.2,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145668981","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":"Oxygen allocation dynamics in a seagrass Zostera marina meadow","authors":"Hyegwang Kim ,&nbsp;Fei Zhang ,&nbsp;Seung Hyeon Kim ,&nbsp;Zhaxi Suonan ,&nbsp;Kun-Seop Lee","doi":"10.1016/j.marenvres.2025.107673","DOIUrl":"10.1016/j.marenvres.2025.107673","url":null,"abstract":"<div><div>Photosynthetic activity in seagrasses benefits various marine organisms in the seagrass ecosystem by supplying oxygen (O₂). This study investigated the allocation of photosynthetically produced O₂ between the above- and below-ground tissues of <em>Zostera marina</em> under different irradiance levels and temperature conditions. Annual variations in O₂ production, consumption, and supply to the surrounding ecosystem were also estimated based on tissue O₂ release and respiration rates, along with <em>in situ</em> underwater irradiance, water temperature, and seagrass biomass. The proportion of O₂ allocated to both above- and below-ground tissues varied depending on light conditions. Across all light conditions, the O₂ allocated to above-ground tissues consistently accounted for a larger proportion than that allocated to non-photosynthetic below-ground tissues. As light intensity decreased, the contribution of O₂ allocated to below-ground tissues declined, indicating that O₂ production in above-ground tissues was insufficient to meet the O₂ demands of the below-ground tissues. The estimated O₂ consumption, release, and daily O₂ supply within the <em>Z. marina</em> meadow varied seasonally, driven by changes in temperature and irradiance conditions. In above-ground tissues, O₂ consumption during the night was lowest in winter, while O₂ release during the day was highest in the warmer months (May–July). The mean daily O₂ supply was 46.40 mmol O₂ m⁻² d⁻¹ (ranging from −69.45 to 231.23 mmol O₂ m⁻² d⁻¹) from above-ground tissues and −9.23 mmol O₂ m⁻² d⁻¹ (ranging from −32.43 to 0.25 mmol O₂ m⁻² d⁻¹) from below-ground tissues. Higher water temperatures and reduced underwater irradiance from late summer to fall resulted in a negative O₂ supply, reducing seagrass shoot density and biomass. These results suggest that environmental changes, particularly those driven by ongoing climate change, significantly influence O₂ dynamics in coastal seagrass ecosystems, with potential ecological consequences for the resistance and resilience of associated marine organisms.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107673"},"PeriodicalIF":3.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145445102","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":"Ciliate assemblage succession in glacier retreat areas of King George Island, Antarctica: Effects of kelp gull activity","authors":"Kyung-Min Park ,&nbsp;Euna Jo ,&nbsp;Seunghyun Kang,&nbsp;Sung Mi Cho,&nbsp;Jeong-Hoon Kim,&nbsp;Sanghee Kim","doi":"10.1016/j.marenvres.2025.107676","DOIUrl":"10.1016/j.marenvres.2025.107676","url":null,"abstract":"<div><div>West Antarctica is undergoing rapid climate change, leading to an increase in newly exposed areas due to glacial retreat. Succession in this region occurs faster than anticipated, with kelp gull activity influencing the colonization of organisms in these newly exposed areas. Although bacterial and plant succession in glacial retreat regions is well-documented, protozoan succession, particularly that of ciliates, remains poorly understood. Ciliates play important roles in microbial food web dynamics and are widely recognized as environmental indicators. The aim of this study was to investigate the colonization patterns and changes in ciliate diversity between bare and annual nesting soils through ciliate assemblage analysis. The results revealed that nesting soils exhibited higher species diversity, significant year-to-year variation, and a lower abundance of the class Colpodea than the bare soils. In conclusion, the results of this study suggested that kelp gull activity affects soil ciliate communities, highlighting the complex and dynamic nature of soil ecosystems.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107676"},"PeriodicalIF":3.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145445170","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":"Seawater intrusion and nitrate pollution in coastal fishery areas: An integrated hydrogeological, hydrochemical, and isotopic approach","authors":"Yushi Xue ,&nbsp;Yaowen Zhang ,&nbsp;He Wang ,&nbsp;Lili Zhang ,&nbsp;Haijun Li","doi":"10.1016/j.marenvres.2025.107668","DOIUrl":"10.1016/j.marenvres.2025.107668","url":null,"abstract":"<div><div>Seawater intrusion and nitrate pollution pose significant environmental challenges to groundwater quality and ecosystem health in coastal fishery areas. However, their combined hydrogeochemical mechanisms remain insufficiently understood. This study investigates the Xingcheng coastal fishery zone in Liaodong Bay, China, by integrating hydrogeological surveys, hydrochemical analyses, and stable isotope techniques to explore seawater intrusion and nitrate contamination. The results show: (1) Groundwater types evolve from Ca–HCO₃ to Na–Cl, with total dissolved solids ranging from 164.57 to 5449.67 mg/L and electrical conductivity between 119.40 and 6350 μS/cm. About 68.2 % of the samples fall within the freshwater-saltwater transitional zone. (2) Seawater intrusion is primarily influenced by groundwater overextraction, marine aquaculture, water-rock interactions, and brackish water irrigation. Spatial gradients in ion composition and δ¹⁸O/δ²H values indicating increasing seawater influence towards the coast. (3) Nitrate pollution affects 70.4 % of the samples, with concentrations exceeding the Class III water quality standard (maximum of 41.51 mg/L). The primary nitrate sources include agricultural fertilization, domestic sewage, and aquaculture. High-risk areas are associated with agricultural, residential, and fishery areas. (4) Pollution types vary across zones: freshwater zone shows nitrate dominance, transitional zone exhibits mild seawater intrusion with nitrate contamination, and saltwater zone is dominated by severe seawater intrusion. This study enhances understanding of groundwater hydrochemical evolution and offers strategies for optimizing aquaculture, promoting water-saving agricultural practices and regulating groundwater extraction, providing a scientific basis for protecting coastal groundwater resources.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107668"},"PeriodicalIF":3.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145452188","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":"Variation in sediment and rhizosphere microbial communities of Posidonia oceanica across sites exposed to different human influences","authors":"Fabio Bulleri ,&nbsp;Ezequiel M. Marzinelli ,&nbsp;Matteo Oliva ,&nbsp;Paul E. Gribben","doi":"10.1016/j.marenvres.2025.107674","DOIUrl":"10.1016/j.marenvres.2025.107674","url":null,"abstract":"<div><div>Sediment microbial communities, in particular bacteria, play a key role in regulating seagrass metabolism through the control of nutrient and chemical cycling. Major differences between seagrass rhizosphere and surrounding bulk sediments suggest that plants can actively shape the composition of the bacterial community associated to their roots. However, the ability of plants to maintain consistent rhizosphere bacterial communities can be expected to decrease along a gradient of increasing human disturbance, as plants experience growing stress levels. We tested this hypothesis by comparing bacterial communities between roots and bulk sediments of <em>Posidonia oceanica</em> across sites characterized by a different exposure to human activities, along and off the coast of Tuscany (NW Mediterranean). There were major variations in granulometry, trophic status and bacterial communities of bulk sediment among study sites. The relative abundance of Desulfobulbaceae (genus <em>Desulforhopalus</em>), which can reduce sulfates to toxic sulfides, was higher in bulk sediments compared to the rhizosphere, suggesting negative selection by the plants. By contrast, bacterial communities in the <em>P. oceanica</em> rhizosphere did not vary among sites exposed to different human pressures and were enriched with Acidimicrobiia (i.e., <em>Ilumatobacter fluminis</em> and CADEDH01 sp902826025) in respect to surrounding sediments. These bacteria are known sulphide oxidisers and may represent a mechanism for sediment detoxification. Our study suggests that <em>P. oceanica</em> may be able to shape the root bacterial community in the face of variations in sediment microbiological and physico-chemical conditions. Alternatively, <em>P. oceanica</em> may have a relatively inflexible microbial community. Our results have important implications for seagrass restoration and management, since maintaining intact root-associated microbiota may enhance the establishment and growth of translocated plants. However, an inability for root bacterial communities to adapt to changes in environmental conditions may render them vulnerable to increasing environmental stress. Testing these two contrasting hypotheses will be an important avenue for future research.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107674"},"PeriodicalIF":3.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145513288","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":"Combined effects of high environmental ammonia and low oxygen conditions on the bioturbation performance and bioenergetics of the ragworm Hediste diversicolor","authors":"Leo L. Gottschalck,&nbsp;J. Clemens Abraham,&nbsp;Nico Massuthe,&nbsp;Martin Powilleit,&nbsp;Stefan Forster,&nbsp;Inna M. Sokolova","doi":"10.1016/j.marenvres.2025.107666","DOIUrl":"10.1016/j.marenvres.2025.107666","url":null,"abstract":"<div><div>Nutrient inputs from agriculture, wastewater, and coastal management practices like rewetting, can lead to high environmental ammonia (HEA) and low dissolved oxygen (DO) conditions in coastal habitats. Coastal benthic infauna can be negatively impacted by these stressors, experiencing physiological and behavioral disruptions that may compromise their performance and, consequently, the essential ecosystem functions they support. We investigated the impacts of a realistic eutrophication scenario consisting of combined HEA (0, 5, and 50 mg L⁻¹ total ammonia) and low DO (2.4 mg L⁻¹) levels on the bioturbation activities and physiological status of the ragworm <em>Hediste diversicolor</em>. Survival was synergistically lowered at very high HEA under low DO conditions. However, there was no strong evidence for an effect of HEA alone or in combination with low DO conditions on burrowing or particle reworking activity but bioirrigation activity increased significantly under low DO conditions. Oxygen consumption rate decreased under low DO conditions but increased with increasing HEA, while the energy reserves and cellular respiration showed no systematic response to either stressor. We conclude that ragworms exhibit a degree of tolerance to nutrient-rich, low DO conditions, maintaining energetic homeostasis through behavioral adaptations. This highlights the crucial role of tolerant marine bioturbators in colonizing and transforming degraded or restored habitats. However, combined stressors and further environmental deterioration may compromise their fitness.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"214 ","pages":"Article 107666"},"PeriodicalIF":3.2,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145668907","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":"Temperature-gradient drives shifts in macrobenthic communities near nuclear power plant thermal discharges: A case study from the Sanmen bay","authors":"Weiwei Zhou,&nbsp;Yushu Yang,&nbsp;Wanhong Han,&nbsp;Aoxiang Huang,&nbsp;Qingxi Han","doi":"10.1016/j.marenvres.2025.107670","DOIUrl":"10.1016/j.marenvres.2025.107670","url":null,"abstract":"<div><div>With the rapid development of the global nuclear power industry, increasing attention has been drawn to the thermal pollution effects of discharged cooling water on marine ecosystems. This study investigated the ecological impacts and adaptive responses of macrobenthos to thermal pollution from nuclear power plant operations. Focusing on the thermal discharge area of Sanmen Nuclear Power Plant, we conducted the systematic evaluation of thermal pollution effects on macrobenthos, utilizing survey data collected from 48 stations during four research cruises between 2022 and 2024. In this research, we tried to reveal the community assembly responses and indicator roles of macrobenthos to thermal discharge disturbance, using Clustering Analysis, non-metric Multidimensional Scaling (nMDS), Principal Component Analysis (PCA), Similarity Percentage analysis (SIMPER), Linear Regression, β diversity decomposition, Multiple Regression Analysis, and Indicator Species Analysis (IndVal). The results demonstrated that rising temperature is the primary environmental factor affecting macrobenthic communities in the thermal discharge area of the Nuclear Power Plant. Under middle thermal discharge impact conditions (ΔT ≤ 5.30 °C), the abundance of macrobenthos increased significantly (<em>p</em> &lt; 0.05), with mollusks exhibited higher spawning efficiency and larval survival rates. However, biomass exhibited a significant decline. β diversity decomposition indicated that turnover components outweighed nestedness components, confirming that thermal discharge primarily drives community reassembly through species replacement. Three distinct thermal adaptation zones emerged along the temperature gradient: the high thermal discharge impact region (3.63 ≤ ΔT ≤ 5.30 °C) was characterized by <em>Nassarius succinctus</em>, <em>Nassarius variciferus</em> and <em>Lumbrineris cruzensis</em>; the middle thermal discharge impact region (0.45 ≤ ΔT ≤ 0.93 °C) by <em>Eulima bifascialis</em>, <em>Raphidopus ciliatus</em> and <em>Typhlocarcinus nudus</em>; and the low thermal discharge impact region (ΔT ≤ 0.2 °C) by <em>Protankyra bidentata</em> and <em>Acaudina molpadioides</em>. Indicator Species Analysis (based on an IndVal index threshold of ≥25) revealed three thermal tolerance groups: high temperature tolerant saprophagous gastropods, middle temperature tolerant small mollusks and plankton dependent crustaceans, and low temperature tolerant polychaetes. These findings provide critical insights into thermal stress responses in coastal ecosystems and establish a framework for ecological monitoring of thermal discharge impacts.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107670"},"PeriodicalIF":3.2,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145438435","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":"Growth in the margins: Field measured protein metabolism rates in the common limpet, Patella vulgata","authors":"Ignacio A. Cienfuegos ,&nbsp;Benjamin J. Ciotti ,&nbsp;Richard A. Billington ,&nbsp;Paul A. Sutton ,&nbsp;Keiron P.P. Fraser","doi":"10.1016/j.marenvres.2025.107658","DOIUrl":"10.1016/j.marenvres.2025.107658","url":null,"abstract":"<div><div>Intertidal shores are characterised by a high variability in abiotic conditions, resulting in marked daily, tidal, seasonal and vertical differences in stress conditions, yet our ability to understand the consequences for key physiological processes at corresponding scales are limited. In particular, no previous studies have directly measured protein metabolism, the key process underpinning animal growth, in the field, in any organism. We measured whole-animal (SGR) and tissue (TSGR) mass growth, protein metabolism (synthesis (<em>k</em>_s), degradation (<em>k</em>_d) and growth (<em>k</em>_g)), RNA to protein ratios and oxidative stress in <em>Patella vulgata</em> in the field every season during a year, at three different shore heights. There were significant seasonal variations in TSGR, protein metabolism, RNA to protein ratios, and oxidative stress. <em>k</em>_s was highest in spring, whereas <em>k</em>_g peaked in summer and was lower in spring due to increased <em>k</em>_d. TSGR were higher in spring/summer compared to winter/autumn, whereas no seasonal differences were found in SGR. Oxidative stress peaked in spring and was at its lowest in winter, in line with other metabolic processes. Gamete production in <em>P. vulgata</em> has been associated with shell growth rate decreases. Current differences observed between juveniles and adults suggest that reproductive cycle could also drive seasonal variations in protein metabolism and TSGR in <em>P. vulgata</em>. Shore height had a significant effect on oxidative stress, with higher lipid peroxidation levels in high shore animals. This study demonstrates how spatial and temporal variations in different aspects of protein metabolism underpin organismal growth in the field.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"213 ","pages":"Article 107658"},"PeriodicalIF":3.2,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145445094","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}