Marine environmental research最新文献_第5页

Functional dynamics of fish assemblages in a tropical estuary during different phases of El Niño‒Southern Oscillation El Niño-Southern涛动不同阶段热带河口鱼类群落的功能动力学。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-24 DOI: 10.1016/j.marenvres.2026.107855

Rayssa Soares da Silva Rodrigues, e André Luiz Machado Pessanha

Climate change has increased the frequency and intensity of El Niño‒Southern Oscillation (ENSO) events, which are climate phenomena involving fluctuations in surface temperatures, wind speed, and rainfall patterns across the globe. These changes affect estuarine fish communities by modifying hydrological cycles and environmental conditions such as salinity and freshwater flow, thereby influencing community composition and functional diversity. Analyzing functional diversity is therefore essential to understanding ecosystem resilience to climate change and anticipating the growing impacts of ENSO. Since ENSO effects vary by phase and geographic location, this study examined how different ENSO phases influenced the functional dynamics of the fish community in the Mamanguape River estuary in northeastern Brazil, using data collected from 2011 to 2016. In terms of environmental conditions, there was a peak in precipitation during the first year of La Niña, followed by the subsequent dry years, with the neutral and El Niño periods being more similar. However, the La Niña phenomenon of 2011 was atypical, with below-average rainfall, and occurred in the middle of a prolonged period of drought that began in the late 1990s, which may have influenced the functional response of the fish community. Unexpectedly, functional redundancy values remained low throughout all ENSO phases, highlighting possible functional vulnerability. The functional diversity of this ecosystem may be maintained because of species complementarity and compensatory effects. These results highlight the importance of analyzing the influence of ENSO in estuaries with different climatic characteristics.

气候变化增加了厄尔尼诺Niño-Southern涛动（ENSO）事件的频率和强度，这是一种涉及全球地表温度、风速和降雨模式波动的气候现象。这些变化通过改变水文循环和环境条件（如盐度和淡水流量）影响河口鱼类群落，从而影响群落组成和功能多样性。因此，分析功能多样性对于理解生态系统对气候变化的适应能力和预测ENSO日益增长的影响至关重要。由于ENSO效应因阶段和地理位置而异，本研究使用2011年至2016年收集的数据，研究了ENSO不同阶段如何影响巴西东北部Mamanguape河河口鱼类群落的功能动态。从环境条件上看，La Niña元年降水出现高峰，随后为干旱年，中性期与El Niño期较为相似。然而，2011年的La Niña现象是非典型的，降雨量低于平均水平，并且发生在20世纪90年代末开始的长期干旱期间，这可能影响了鱼类群落的功能响应。出乎意料的是，在所有ENSO阶段，功能冗余值仍然很低，突出了可能存在的功能漏洞。由于物种的互补性和补偿效应，该生态系统的功能多样性得以保持。这些结果突出了分析ENSO对不同气候特征河口的影响的重要性。

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引用次数: 0

On the nocturnal emergence of reef-dwelling urchins: continental-scale patterns and correlates 关于夜间出现的珊瑚礁海胆：大陆尺度的模式和相关关系。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-23 DOI: 10.1016/j.marenvres.2026.107883

Tyson R. Jones, Graham J. Edgar, Sterling B. Tebbett, Lara Denis-Roy, Scott D. Ling

Sea urchins are renowned for their capacity to shape shallow reef community structure and function, especially when at high densities. However, most quantitative assessments of urchin densities are based on diurnal surveys, despite the nocturnal emergence of urchins being a well-recognised phenomenon. The value of such diurnal density estimates is, therefore, inherently dependent on the extent of nocturnal urchin emergence and the consistency of this diel behaviour under different contexts. Yet, our understanding of nocturnal urchin emergence under different local conditions at broad scales including between tropical and temperate reefs, remains largely unresolved. Here, we evaluate the extent of nocturnal urchin emergence, and assess how this varied with potential predictors, using paired day and night surveys across a total of 42 reef sites spanning tropical (n = 23) and temperate (n = 19) Australia. Among kelp-dominated temperate rocky reefs, urchin densities and biomass were ∼7-8-fold greater than observed on tropical coral reefs. Regardless of realm, urchin densities and biomass were consistently higher at night, with tropical reefs showing the greatest diel differences (3.5-fold higher density and 3.0-fold higher biomass) compared to temperate reefs (1.4-fold and 1.7-fold, respectively). Gradient Boosted Regression Trees revealed that mean sea surface temperature (SST) was the strongest predictor of the relative extent of nocturnal urchin emergence, with higher relative emergence on reefs with warmer SST, corresponding with strong patterns in nocturnal emergence peaking toward equatorial latitudes. Our findings show that daytime surveys likely greatly underestimate urchin activity, population size, and ecological impacts, particularly on tropical reefs, with important consequences for reef monitoring and management.

海胆以其塑造浅礁群落结构和功能的能力而闻名，特别是在高密度的情况下。然而，尽管海胆在夜间出现是一个公认的现象，但大多数对海胆密度的定量评估都是基于日调查。因此，这种日密度估计的值本质上取决于夜间海胆出现的程度以及在不同环境下这种饮食行为的一致性。然而，我们对包括热带和温带珊瑚礁在内的不同地方条件下夜间海胆出现的理解在很大程度上仍未得到解决。在这里，我们评估了夜间海胆出现的程度，并通过对澳大利亚热带（n = 23）和温带（n = 19）的42个珊瑚礁地点进行配对的昼夜调查，评估了这种情况与潜在预测因素的差异。在以海带为主的温带岩礁中，海胆的密度和生物量是热带珊瑚礁的7-8倍。无论在哪个领域，海胆密度和生物量在夜间始终较高，热带珊瑚礁的昼夜差异最大（密度高3.5倍，生物量高3.0倍），而温带珊瑚礁的昼夜差异分别为1.4倍和1.7倍。梯度增强回归树显示，平均海表温度（SST）是海胆夜间出苗率的最强预测因子，海表温度越高，海胆夜间出苗率越高，与海胆夜间出苗率在赤道纬度处达到峰值的强烈模式相对应。我们的研究结果表明，白天的调查可能大大低估了海胆的活动、种群规模和生态影响，特别是对热带珊瑚礁的影响，这对珊瑚礁的监测和管理产生了重要影响。

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引用次数: 0

A review of antibiotic accumulation, degradation and ecological risk in typical mangrove ecosystems 典型红树林生态系统抗生素积累、降解及生态风险研究进展

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-22 DOI: 10.1016/j.marenvres.2026.107867

Xiang Sun , Xiang Huang , Huan Li , Chupan Tan , Wanqi Lu , Danyi Wei , Wenhui Liao , Jin Luo , Yongze Xing , Haitao Chen , Ning Huang

Mangrove ecosystems, characterized by unique biogeochemical conditions, act as critical zones for intercepting and processing antibiotic contaminants. This study synthesizes existing research using bibliometric and meta-analysis to elucidate the mechanisms of antibiotic accumulation, degradation, and associated ecological risks in mangroves. A central finding from the meta-analysis is the lack of a significant difference in antibiotic concentrations between mangrove forests and adjacent intertidal mudflats, highlighting the complex balance between competing accumulation and degradation processes. The major points are the following: 1) Sediment properties (e.g., texture, organic matter) are primary drivers of antibiotic accumulation; 2) Specific bacterial taxa (e.g., Proteobacteria, Achromobacter) of mangroves mediate antibiotic biodegradation through enzymatic and co-metabolic pathways. The degradation efficiency is further modulated by environmental factors, including salinity, temperature, oxygen availability, moisture, and the presence of co-contaminants such as heavy metals and microplastics; 3) Antibiotic contamination disrupts essential ecological functions (e.g., carbon and nitrogen cycling, water purification) and promotes the propagation of ARGs within mangrove ecosystems, thereby triggering cascading ecological risks within mangrove ecosystems. This review underscores the need for stricter pollution control and calls for research on the combined effects of multiple contaminants to guide mangrove conservation and sustainable management.

红树林生态系统具有独特的生物地球化学条件，是拦截和处理抗生素污染物的关键区域。本研究利用文献计量学和荟萃分析综合现有研究，阐明红树林抗生素积累、降解和相关生态风险的机制。荟萃分析的一个中心发现是，红树林和邻近的潮间带泥滩之间的抗生素浓度缺乏显著差异，突出了竞争性积累和降解过程之间的复杂平衡。主要观点如下：1)沉积物性质（如质地、有机质）是抗生素积累的主要驱动因素；2)红树林特有的细菌类群（如变形杆菌、无色杆菌）通过酶和共代谢途径介导抗生素的生物降解。降解效率进一步受到环境因素的调节，包括盐度、温度、氧气可用性、湿度以及重金属和微塑料等共污染物的存在；3)抗生素污染破坏红树林生态系统的基本生态功能（如碳氮循环、水净化），促进ARGs在红树林生态系统内的繁殖，从而引发红树林生态系统内的级联生态风险。这一综述强调了加强污染控制的必要性，并呼吁研究多种污染物的综合影响，以指导红树林的保护和可持续管理。

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引用次数: 0

A phycospheric bacteria perspective: Preliminary investigation into the differential formation of sporangial branchlets in Pyropia haitanensis under varied temperatures and light intensities 藻球细菌视角：不同温度和光照条件下海地焦皮藻孢子囊小枝差异形成的初步研究

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-22 DOI: 10.1016/j.marenvres.2026.107848

Rui Zhao , Rui Chai , Qingli Gong , Ningning Xu , Wenjie Yan , Xu Gao

Temperature and light intensity are two important abiotic factors influencing the growth and development of marine macroalgae. In this study, we investigated the differences in the sporangial branchlets formation of Pyropia haitanensis under different temperatures and light intensities. The physiological profiling and phycospheric bacterial community changes were examined. We observed that the increasing temperature group (Group A: 29 °C, 60 μmol m⁻² s⁻¹, and Group C: 29 °C, 20 μmol m⁻² s⁻¹) exhibited extensive formation of sporangial branchlets, whereas the decreasing light intensity group (Group B: 21 °C, 60 μmol m⁻² s⁻¹) rarely formed sporangial branchlets. Conchocelis of P. haitanensis adapted to temperature and light intensity shifts by altering chlorophyll fluorescence, pigment proteins and oxidative damage indicator (malondialdehyde). The 16S rRNA gene sequencing revealed significant differences in the relative abundance of phycospheric bacteria among the 4 treatments. The relative abundance of 7 bacteria was significantly increased in Group A and Group C, while that of 4 bacteria was increased in the Group B. Notably, Bacillus and Pseudonocardia were common dominant phycospheric bacteria in the increasing temperature group. Correlation heatmap analyses revealed that the phycospheric bacteria were closely associated with the environmental factors and physiological data. However, the underlying mechanism of this association remains to be further investigated. This study contributes to understanding how environmental changes and microorganisms are linked in the artificial seedling cultivation of P. haitanensis.

温度和光强是影响海洋巨藻生长发育的两个重要的非生物因素。本研究研究了不同温度和光照条件下海檀焦皮（Pyropia haitanensis）孢子小枝形成的差异。研究了生理特征和藻球细菌群落的变化。结果表明，温度升高组（A: 29℃，60 μmol m−2 s−1）和温度升高组（C: 29℃，20 μmol m−2 s−1）孢子小枝大量形成，而温度降低组（B: 21℃，60 μmol m−2 s−1）孢子小枝很少形成。海棠螺通过改变叶绿素荧光、色素蛋白和氧化损伤指标（丙二醛）来适应温度和光强的变化。16S rRNA基因测序结果显示，4个处理间藻球菌相对丰度差异显著。A组和C组有7种细菌的相对丰度显著增加，b组有4种细菌的相对丰度显著增加。值得注意的是，在温度升高组，芽孢杆菌和假心杆菌是常见的优势藻球细菌。相关热图分析表明，藻球细菌与环境因素和生理数据密切相关。然而，这种关联的潜在机制仍有待进一步研究。本研究有助于了解海棠人工育苗过程中环境变化与微生物的关系。

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引用次数: 0

Relationship between biofouling abundance on wood and the recruitment and growth of the wood-boring bivalve Bankia martensi (Stempell, 1899) - Seasonal and bathymetric variations 木材上的生物污染丰度与钻木双壳类马氏班克亚（Bankia martensi, Stempell, 1899）的吸收和生长之间的关系——季节和水深变化

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-22 DOI: 10.1016/j.marenvres.2026.107866

Boris A. López

The marine wood-boring bivalve Bankia martensi (Stempell, 1899) is the primary agent responsible for wood degradation along the Chilean coast. However, there is limited understanding of its interactions with other marine wood-biofouling species. Previous studies have shown an inverse relationship between biofouling cover on wood and the recruitment and growth of B. martensi. These trends may vary over time and at different depths. Consequently, during the austral autumn and spring of 2024, pine wood panels (25 x 15 × 5 cm) were submerged at three different depths (1, 3, and 5 m below the water surface) in Metri Bay (41°36′S; 72°42′W). After five months, B. martensi recruitment and size were assessed, along with biofouler cover and biomass on the panels. The recruitment and size of B. martensi were higher in spring (1.7 ± 0.3 perforations∗cm⁻²) than in autumn (0.5 ± 0.2 perforations∗cm⁻²) and diminished with increasing depth (mainly at 5 m). Inverse associations were observed between the recruitment and size of B. martensi specimens and the cover and biomass of the main biofouler species. These results suggest that the presence of biofouling species influences larval settlement and growth of B. martensi. Furthermore, these potential interspecific competition relationships change depending on season and depth, thereby affecting the rate at which xylophagous species degrade wood. Manipulative experiments with biofouler species, as well as measurements of the reproductive traits of B. martensi, could help us understand the biological interactions between marine wood borers and biofouler species.

海洋钻木双壳贝Bankia martensi （Stempell, 1899）是智利沿海木材退化的主要原因。然而，对其与其他海洋木材生物污染物种的相互作用了解有限。以往的研究表明，木材上的生物污染覆盖度与马氏白僵菌的吸收和生长呈反比关系。这些趋势可能随着时间和深度的不同而变化。因此，在2024年秋季和春季，在米特里湾（41°36'S; 72°42'W）的三个不同深度（水面以下1,3和5 m）淹没了松木板（25 x 15 x 5 cm）。5个月后，评估了马氏白僵菌的数量和大小，以及生物燃料覆盖和面板上的生物量。马氏白刺在春季（1.7±0.3个孔（∗cm−2））比秋季（0.5±0.2个孔（∗cm−2））招募量大，且随深度增加（主要在5 m）而减小。马氏白僵菌的数量和大小与主要物种的盖度和生物量呈负相关。这些结果表明，生物污染物种的存在影响了马氏白鲟的幼虫定居和生长。此外，这些潜在的种间竞争关系会随着季节和深度的变化而变化，从而影响食木物种降解木材的速度。通过对木纹螟种群的操作实验，以及对马氏b.m artensi繁殖性状的测定，有助于了解木纹螟与木纹螟之间的生物相互作用。

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引用次数: 0

Tracking photoinhibition and failure dynamics in algae under combined exposure to UVB and water-accommodated oil fractions 跟踪海藻在UVB和水容油组分联合暴露下的光抑制和失效动力学

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-22 DOI: 10.1016/j.marenvres.2026.107862

V.F. Torosyan , V. Yu Timofeev , Ratchagaraja Dhairiyasamy , Deekshant Varshney , Subhav Singh

Increasing UV radiation and persistent petroleum-derived contaminants in aquatic environments have raised concerns regarding their combined effects on primary producers. Microalgae, such as Chlorella vulgaris, are particularly vulnerable owing to their surface-dwelling nature and their high sensitivity to impairment of photosystem II (PSII). The hazards associated with photosynthetic failure under ultraviolet (UV) stress in the presence of oil-derived mixtures remain inadequately quantified, particularly under environmentally realistic light spectra. This study addressed this knowledge gap by characterizing the joint effects of UV radiation and petroleum hydrocarbons on algal PSII function and viability. This study aimed to quantify failure thresholds using PAM fluorometry and survival analysis, and to link these with passive sampling of freely dissolved hydrocarbons. A programmable solar simulator was employed to deliver PAR + UVA and PAR + UVA + UVB exposures for 72 h, whereas water-accommodated fractions (WAFs) of crude oil, with and without an anionic surfactant, were administered at environmentally relevant concentrations. The PDMS passive samplers were calibrated for the target polycyclic aromatic hydrocarbons (PAHs) and their uptake kinetics were validated. Time-to-failure was defined as the crossing of an Fv/Fm ≤ 0.4 threshold, and hazard curves were generated across treatment groups. Notably, failure hazards increased significantly under UVB irradiation, particularly in WAF treatments combined with surfactants at critical micelle concentrations, indicating synergistic phototoxicity. These findings highlight the elevated risk posed by the combined UV and chemical stressors on phytoplankton productivity. The framework developed in this study provides a robust method for quantifying failure risks under multi-stressor conditions. Future research should explore the dynamics of chronic adaptation and the community-level effects of natural systems.

水生环境中不断增加的紫外线辐射和持久性石油衍生污染物引起了人们对它们对初级生产者的综合影响的关注。微藻，如小球藻，由于其表面生活的性质和对光系统II （PSII）损伤的高度敏感性，特别容易受到伤害。在油衍生混合物存在的紫外线胁迫下，与光合作用失败相关的危害仍然没有充分量化，特别是在环境现实的光谱下。本研究通过表征紫外线辐射和石油碳氢化合物对藻类PSII功能和活力的共同影响来解决这一知识空白。本研究旨在使用PAM荧光测定法和存活分析来量化失效阈值，并将这些与自由溶解碳氢化合物的被动采样联系起来。使用可编程太阳模拟器进行PAR + UVA和PAR + UVA + UVB照射72小时，而原油的水容馏分（was），无论是否使用阴离子表面活性剂，都以环境相关浓度进行处理。对PDMS被动采样器的目标多环芳烃（PAHs）进行了标定，并验证了其吸收动力学。失效时间定义为Fv/Fm≤0.4阈值的交叉点，并生成各治疗组的危险曲线。值得注意的是，在UVB照射下，失效危险显著增加，特别是在临界胶束浓度的WAF处理与表面活性剂联合使用时，表明协同光毒性。这些发现强调了紫外线和化学胁迫对浮游植物生产力造成的风险增加。本研究开发的框架为在多应力条件下量化失效风险提供了一种可靠的方法。未来的研究应探索慢性适应的动态和自然系统的社区效应。

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引用次数: 0

Characterization and potential risks of microplastics in marine mollusks using the laser direct infrared (LDIR) technique 利用激光直接红外（LDIR）技术表征海洋软体动物体内微塑料及其潜在风险

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-21 DOI: 10.1016/j.marenvres.2026.107871

Jia Teng , Shuang Zhao , Jianmin Zhao , Dongyu Wang , Jiashen Li , Yan Fang , Qing Wang , Yuting Zhao

Microplastics (MPs) pollution in marine environments is a growing concern, especially where mollusks for human consumption are harvested. This study investigated the contamination and potential risks of MPs in mollusks collected from the Yantai coastal waters using Laser Direct Infrared (LDIR) imaging. The average MPs abundance was 7.55 ± 4.87 items/g (w.w.) in mollusks soft tissues. The carnivorous Buccinum undatum exhibited the highest MP load, likely due to biomagnification. Spearman correlation analysis revealed a negative relationship between MPs abundance and mollusk biological traits, suggesting that larger individuals have lower concentrations. Fibers (52.63 %) and small particles <50 μm (76.19 %) dominated the composition and polyethylene was the most common polymer. The Polymer Hazard Index (PHI) value of 2115 indicated a high risk level (V). The estimated average annual MP intake from mollusk consumption was 24,680 particles/person/year, highlighting potential health concerns. This study provides crucial data for understanding MP pollution in mollusks and its potential risks.

海洋环境中的微塑料污染日益受到关注，特别是在收获供人类食用的软体动物的地方。采用激光直接红外（LDIR）成像技术，对烟台沿海海域采集的软体动物体内多磺酸盐的污染情况及潜在危害进行了研究。软体动物组织中MPs的平均丰度为7.55±4.87项/g （w.w）。肉食性Buccinum unatum表现出最高的MP负荷，可能是由于生物放大。Spearman相关分析显示，MPs丰度与软体动物生物学性状呈负相关，表明个体越大，MPs浓度越低。纤维（52.63%）和小颗粒（<50 μm）（76.19%）占主导地位，聚乙烯是最常见的聚合物。聚合物危害指数（PHI）为2115，为高危险等级(V)。据估计，每年从食用软体动物中摄入的平均MP为24,680颗粒/人/年，这突出了潜在的健康问题。本研究为了解软体动物的MP污染及其潜在风险提供了重要数据。

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引用次数: 0

Behavioural and biochemical effects of underwater noise from vessel traffic on Baltic sea mussels (Mytilus spp.) 船舶噪声对波罗的海贻贝行为和生化的影响

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-21 DOI: 10.1016/j.marenvres.2026.107870

Rami El-Dairi, Viivi Pöyhönen, Raisa Turja, Okko Outinen, Kari K. Lehtonen

Underwater noise is an emerging physical stressor in the Baltic Sea, where strong seasonality coincides with peaks in recreational boating and continuous commercial shipping. While behavioural effects of noise are increasingly reported for marine invertebrates, Baltic mussels (Mytilus spp.) remain untested, and links to cellular physiology are scarce. We conducted controlled laboratory exposures of pre-recorded vessel noise with variable exposure durations, and quantified behavioural and biochemical responses in Baltic mussels. Individual valve-gape behaviours were recorded before, during, and after exposure; in parallel, we measured a suite of neurotoxicity and antioxidant biomarkers, including acetylcholinesterase, catalase, glutathione reductase, reduced glutathione, glutathione S-transferase, lipid peroxidation and superoxide dismutase. Compared with control mussels, noise treatments elicited significant changes in valve-gape behaviour and altered biomarker profiles. Elevated closure activity was linked with higher LPO and shifts in antioxidant enzyme responses, suggesting short-term trade-offs between defence and energy acquisition. Our results provide the first evidence for concurrent behavioural and biochemical effects of vessel noise on mussels from the Baltic Sea, demonstrating that noise can cause changes in their energy dynamics. Our results suggest that mussel behaviour depends strongly on the duration of noise exposure, in addition to its frequency pattern and intensity.

在波罗的海，水下噪音是一种新兴的生理压力源，在这里，强烈的季节性与休闲划船和持续的商业航运的高峰相吻合。虽然噪音对海洋无脊椎动物的行为影响的报道越来越多，但波罗的海贻贝（Mytilus spp.）仍然未经测试，并且与细胞生理学的联系很少。我们对预先记录的不同暴露时间的船舶噪声进行了实验室暴露控制，并量化了波罗的海贻贝的行为和生化反应。在暴露前、暴露中和暴露后分别记录个体的阀门间隙行为；同时，我们测量了一套神经毒性和抗氧化生物标志物，包括乙酰胆碱酯酶、过氧化氢酶、谷胱甘肽还原酶、还原性谷胱甘肽、谷胱甘肽s -转移酶、脂质过氧化和超氧化物歧化酶。与对照贻贝相比，噪声处理引起了阀间隙行为和生物标志物谱的显著变化。较高的关闭活性与较高的LPO和抗氧化酶反应的变化有关，表明防御和能量获取之间的短期权衡。我们的研究结果为船舶噪音对波罗的海贻贝的行为和生化影响提供了第一个证据，表明噪音可以引起贻贝能量动力学的变化。我们的研究结果表明，贻贝的行为在很大程度上取决于噪音暴露的持续时间，以及噪音的频率模式和强度。

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引用次数: 0

Ocean acidification effects on growth, survival and physiological immunity of farmed Larimichthys crocea 海洋酸化对养殖鲈鱼生长、存活及生理免疫的影响

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-20 DOI: 10.1016/j.marenvres.2026.107869

Xiaoyan Zhang , Feng Liu , Xiao Liang , Zhigang Xie , Guoer Shao , Ting Ye , Bao Lou

Ocean acidification has become a significant global ecological issue, particularly in coastal regions with intensive aquaculture. Fish farming is a crucial component of global food security, yet research on the impact of acidification on the aquaculture performance of economically important teleosts remains limited. In this study, we reared the fast-growing large yellow croaker (Larimichthys crocea) for 30 days under three different pH conditions: severe acidification (LA, pH 7.4), moderate acidification (MA, pH 7.8), and control (HA, pH 8.1). We comprehensively evaluated growth performance, survival rate, tissue structure, antioxidant enzyme activity, and innate immunity. The results showed that the LA group exhibited suppressed growth (significantly lower than the MA group, p < 0.05), elevated cortisol and T4 levels (p < 0.05), and trends of reduced antioxidant enzyme and innate immune enzyme activities, along with organ-specific pathological changes (vacuolation, structural loosening) in gills, liver, kidneys, and intestines, though most indices showed no significant difference from the HA group. Notably, the MA group showed optimal growth performance, stable physiological and immune responses. In conclusion, while acidification did not markedly affect the survival rate of L. crocea, severe acidification (pH 7.4) induces stress responses and tissue damage. These findings suggest that L. crocea exhibits a certain degree of tolerance to the acidification conditions tested, as several physiological parameters were not significantly affected. However, when considering the overall set of observations, including histological alterations across multiple tissues and changes in plasma and tissue parameters, long-term exposure to severe acidification (pH 7.4) appears to induce tissue damage and stress-related physiological disturbances, indicating potential health risks. This study provides empirical evidence regarding the potential risk posed by projected ocean acidification on L. crocea aquaculture and supports the development of climate change adaptation strategies for coastal mariculture.

海洋酸化已成为一个重大的全球生态问题，特别是在集约化水产养殖的沿海地区。鱼类养殖是全球粮食安全的重要组成部分，但关于酸化对具有重要经济意义的硬骨鱼水产养殖性能影响的研究仍然有限。本研究采用三种不同的pH条件：重度酸化（LA, pH 7.4）、中度酸化（MA, pH 7.8）和对照（HA, pH 8.1），饲养快速生长的大黄鱼（Larimichthys crocea） 30 d。我们综合评估了生长性能、存活率、组织结构、抗氧化酶活性和先天免疫。结果显示，LA组生长受到抑制（显著低于MA组，p < 0.05），皮质醇和T4水平升高（p < 0.05），抗氧化酶和先天免疫酶活性有降低的趋势，同时鳃、肝脏、肾脏和肠道的器官特异性病理改变（空泡化、结构松动），但大多数指标与HA组无显著差异。值得注意的是，MA组的生长性能最佳，生理和免疫反应稳定。综上所述，虽然酸化对罗非鱼的存活率没有显著影响，但严重酸化（pH 7.4）会引起应激反应和组织损伤。这些结果表明，乳杆菌对酸化条件具有一定的耐受性，因为一些生理参数没有受到显著影响。然而，考虑到整体观察结果，包括多个组织的组织学改变以及血浆和组织参数的变化，长期暴露于严重酸化（pH值7.4）似乎会诱导组织损伤和与应激相关的生理紊乱，表明潜在的健康风险。本研究为预测海洋酸化对沙鳅养殖业的潜在风险提供了经验证据，并为沿海海水养殖业气候变化适应策略的制定提供了支持。

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引用次数: 0

Combined contamination of OPEs and PAEs in coastal sediments: Distribution, sources, and ecological risks in Northern China's Marginal Seas 中国北方沿海沉积物中OPEs和PAEs的复合污染：分布、来源和生态风险

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-19 DOI: 10.1016/j.marenvres.2026.107859

Bin Han , Li Zheng , Yinghui Liu

To address the gap in understanding the combined contamination characteristics, source contributions, and interactive ecological risks of OPEs and PAEs in semi-enclosed seas, this study presents a comparative analysis of 16 OPEs and 16 PAEs in 23 surface sediment samples from the Bohai and North Yellow Seas, China. Surface sediment samples were collected using a grab sampler, pretreated via freeze-drying, ASE, and SPE purification, and analyzed by GC/MS. Source apportionment was conducted using PCA and ecological risks were assessed via the RQ method. Concentrations of ΣOPEs and ΣPAEs ranged from 128.73 to 242.33 ng g⁻¹ and 1143.05–3541.88 ng g⁻¹ dry weight, respectively, with distinct pollution hotspots identified in Bohai Bay and Laizhou Bay. This ΣOPE level is comparable to that of other semi-enclosed bays in eastern China but significantly lower than the Yangtze River Estuary, while ΣPAEs are approximately one order of magnitude higher than ΣOPEs, consistent with their higher addition ratios in plastic products. PCA revealed that OPEs primarily originated from industrial production and traffic emissions, whereas PAEs were predominantly derived from plastic processing and atmospheric deposition. Ecological risk assessment using RQ indicated that OPEs posed negligible risks to aquatic organisms. In contrast, PAEs-specifically DIBP and DBP-presented moderate-to-high risks to fish, with DBP reaching a high-risk level (RQ ≥ 10) at 33 % of the sites in Laizhou Bay. This study is the first comprehensive assessment of combined OPE-PAE contamination in the Bohai and North Yellow Seas, clarifying structure-dependent environmental behavior and interactive ecological risks, and providing critical baseline data for targeted pollution control in semi-enclosed marine systems.

为了弥补对半封闭海中OPEs和PAEs的综合污染特征、来源贡献和交互生态风险的认识空白，本研究对渤海和北黄海23个表层沉积物样品中的16种OPEs和16种PAEs进行了比较分析。表层沉积物样品采用抓取式取样器采集，经冷冻干燥、ASE和SPE净化预处理，并进行GC/MS分析。采用主成分分析法进行污染源分析，采用RQ法进行生态风险评价。ΣOPEs和ΣPAEs的浓度分别为128.73 ~ 242.33 ng g−1和1143.05 ~ 3541.88 ng g−1干重，在渤海湾和莱州湾有明显的污染热点。该ΣOPE水平与中国东部其他半封闭海湾相当，但明显低于长江口，而ΣPAEs比ΣOPEs高约一个数量级，这与它们在塑料制品中的添加率较高一致。主成分分析表明，OPEs主要来源于工业生产和交通排放，PAEs主要来源于塑料加工和大气沉积。利用RQ进行的生态风险评估表明，有机磷农药对水生生物的风险可以忽略不计。相比之下，paes（特别是DIBP和DBP）对鱼类具有中至高风险，其中DBP在莱州湾33%的站点达到高风险水平（RQ≥10）。本研究首次对渤海和北黄海OPE-PAE复合污染进行了综合评价，阐明了结构依赖的环境行为和相互作用的生态风险，为半封闭海洋系统的定向污染控制提供了关键的基线数据。

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引用次数: 0