Marine environmental research最新文献_第7页

Transformation of particulate matter while sinking through the oxygen minimum zone of the Eastern Arabian Sea 通过东阿拉伯海最低氧区下沉时颗粒物的转化。

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

Marine environmental research

Pub Date : 2026-01-16 DOI: 10.1016/j.marenvres.2026.107858

Siby Kurian, Apsara Vijayan, Damodar M. Shenoy, Suhas Shetye, Supriya Karapurkar, Albertina Dias, Anand Methar, Aninda Mazumdar, Aditya Peketi, Rakhee Khandeparker

The degradation of particulate organic matter in the ocean plays a critical role in regulating the marine carbon cycle and sustaining oxygen minimum zones. In this study, suspended particulate matter from two stations in the eastern Arabian Sea, encompassing both oxic and suboxic water columns, was studied to investigate the transformation of particulate matter during vertical transport. Scanning electron microscopy revealed the presence of diverse planktonic assemblages with a noticeable decline in abundance at greater depths. Particulate organic carbon (POC) and particulate nitrogen (PN) concentrations decreased sharply within the upper 60 m, indicating rapid degradation of labile organic matter in the euphotic zone. The POC/PN ratio increased with depth, suggesting preferential nitrogen loss during remineralisation. δ¹⁵N values ranged from +2.7 ‰ to +6.4 ‰, with enriched signatures in surface and suboxic layers, while δ¹³C values became progressively depleted with depth (up to −25.6 ‰), reflecting the loss of isotopically heavier compounds and the dominance of lighter, more refractory material. Phytoplankton marker pigments were abundant in the upper water column, while degradation products were prevalent in suboxic waters. Fatty acid methyl ester profiles were dominated by palmitic acid, followed by stearic acid, indicating a predominance of diatoms and dinoflagellates. Sterol analysis identified cholesterol, brassicasterol, stigmasterol, and β-sitosterol, with depth-dependent variations in their concentrations. Despite differences in depth and dissolved oxygen profiles between the two stations, the study consistently demonstrated substantial degradation of organic matter within the upper 60 m oxic water column and highlighted the differential preservation efficiencies of various biogeochemical markers.

海洋颗粒物有机物的降解在调节海洋碳循环和维持最低氧区中起着至关重要的作用。本研究以阿拉伯海东部两个站的悬浮颗粒物为研究对象，研究了悬浮颗粒物在垂直输送过程中的转化。扫描电子显微镜显示了不同浮游生物组合的存在，在更深的地方丰度明显下降。颗粒有机碳（POC）和颗粒氮（PN）浓度在60 m范围内急剧下降，表明绿化带内活性有机物降解迅速。POC/PN比随深度增加而增加，表明再矿化过程中氮的优先损失。δ15N值在+2.7‰~ +6.4‰之间，在表层和亚氧层表现出富集特征，而δ13C值随着深度的增加逐渐减弱（最大可达-25.6‰），反映了同位素较重的化合物的损失和较轻的难熔物质的优势。浮游植物标志色素在上层水体中丰富，而降解产物在亚氧水体中普遍存在。脂肪酸甲酯谱以棕榈酸为主，其次是硬脂酸，表明硅藻和鞭毛藻占优势。甾醇分析鉴定出胆固醇、油菜甾醇、豆甾醇和β-谷甾醇，其浓度随深度变化而变化。尽管两个站点之间的深度和溶解氧分布存在差异，但研究一致表明，在60 m以上的氧化水柱中有机物存在大量降解，并突出了各种生物地球化学标记物的保存效率差异。

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引用次数: 0

Trends in biodiversity research in Brazilian marine protected areas 巴西海洋保护区生物多样性研究趋势

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

Marine environmental research

Pub Date : 2026-01-16 DOI: 10.1016/j.marenvres.2026.107864

Vinicius J. Giglio , Carine O. Fogliarini , Mariana G. Bender , Carlos E.L. Ferreira

Marine protected areas (MPAs) are the main conservation tool for safeguarding biodiversity and ecological processes. However, their planning and effectiveness depend on a robust understanding of biodiversity patterns. We conducted a systematic review of the literature to investigate trends in biodiversity research within Brazilian MPAs. We evaluated the taxonomic groups, diversity facets (taxonomic, functional and phylogenetic), sampling approaches and geographic distribution of studies. Of the 191 articles reviewed, 71% investigated a single diversity facet and 29%% considered both taxonomic and functional facets. Despite an increase in research over recent decades, the literature remains taxonomically and geographically biased. Most studies focused on fishes (58%) and taxonomic diversity (52%), while 20% addressed functional diversity, and phylogenetic diversity was virtually absent. Vertebrates were overrepresented, and studies were concentrated in fully protected MPAs and in Southeastern, Eastern, and Northeastern ecoregions. Most articles (93%) generated primary data, mainly through diver-based and imaging surveys. The limited integration across diversity facets may hinder a comprehensive understanding of ecological processes and effective conservation planning. We identify knowledge gaps and recommend expanding research efforts to underrepresented regions, taxa, and diversity facets. We encourage basic diversity research through species inventories for poorly known taxa and MPAs. Incorporating diversity facets will contribute to improving the ecological representativeness and resilience of Brazilian MPAs.

海洋保护区是保护生物多样性和生态过程的主要保护工具。然而，它们的规划和有效性取决于对生物多样性模式的充分理解。我们对文献进行了系统回顾，以调查巴西海洋保护区生物多样性研究的趋势。我们评估了分类类群、多样性方面（分类、功能和系统发育）、抽样方法和研究的地理分布。在所回顾的191篇文献中，71%研究了单一多样性方面，29%研究了分类学和功能方面。尽管近几十年来的研究有所增加，但文献在分类学和地理上仍然存在偏见。大多数研究集中在鱼类（58%）和分类多样性（52%）上，而20%的研究集中在功能多样性上，系统发育多样性几乎缺失。脊椎动物的比例过高，研究集中在完全保护的海洋保护区和东南部、东部和东北部的生态区域。大多数文章（93%）主要通过潜水员和成像调查生成原始数据。多样性方面的有限整合可能会阻碍对生态过程的全面理解和有效的保护规划。我们发现知识差距，并建议将研究工作扩大到代表性不足的地区、分类群和多样性方面。我们鼓励通过对鲜为人知的分类群和海洋保护区进行物种清查来进行基本的多样性研究。纳入多样性方面将有助于提高巴西海洋保护区的生态代表性和恢复力。

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引用次数: 0

Quantifying the effect of biomass magnitude on apparent methylmercury toxicity in marine phytoplankton 量化生物量量级对海洋浮游植物甲基汞表观毒性的影响

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

Marine environmental research

Pub Date : 2026-01-16 DOI: 10.1016/j.marenvres.2026.107861

Owhonda Chikeru Ihunwo, Edward A. Laws

Methylmercury (MeHg) is a potent neurotoxin whose ecological impacts begin at the base of marine food webs, yet laboratory toxicity assays often rely on phytoplankton biomass levels far exceeding those found in natural waters. This discrepancy obscures true per-cell sensitivity and complicates cross-species comparisons. Here, we quantify the influence of initial biomass on apparent MeHg toxicity across five ecologically and taxonomically diverse marine phytoplankton—Thalassiosira pseudonana, Cricosphaera carterae, Emiliania huxleyi, Synechococcus elongatus, and Phaeodactylum tricornutum. Dose–response experiments were conducted across a gradient of initial optical densities (OD₇₅₀), and EC₅₀ values were estimated using nonlinear regression. Log₁₀-transformed EC₅₀ values exhibited strong linear relationships with OD₇₅₀ for most species, demonstrating a consistent biomass buffering effect in which higher cell densities reduce apparent MeHg toxicity. Extrapolation of regression models to OD = 0 yielded intrinsic, biomass-normalized EC₅₀ values that converged more tightly across taxa than raw EC₅₀ measurements, revealing a shared physiological sensitivity range once biomass artifacts were removed. Cricosphaera carterae was the most sensitive species (EC₅₀ = 0.0015 μg/L), while Synechococcus elongatus was the most tolerant (EC₅₀ = 43.86 μg/L). These biomass-adjusted EC₅₀ values were used to construct a species sensitivity distribution (SSD), from which an HC₅ of 2.25 x 10⁻³ μg/L was estimated. Following the EPA acute-criteria relationship (FAV = 2 × HC₅), a Final Acute Value (FAV) of 4.50 x 10⁻³ μg/L was derived. These findings demonstrate that biomass strongly modulates apparent MeHg toxicity and that biomass-adjusted EC₅₀ values serve as useful upper-bound estimates of per-cell sensitivity. This framework provides a reproducible method for normalizing toxicity data across taxa and improves the interpretation of contaminant sensitivity under low-biomass conditions without directly predicting ecological risk in situ.

甲基汞（MeHg）是一种强效的神经毒素，其生态影响始于海洋食物网的基础，但实验室毒性分析往往依赖于远远超过自然水域的浮游植物生物量水平。这种差异模糊了真实的单个细胞敏感性，并使跨物种比较变得复杂。在这里，我们量化了初始生物量对五种生态和分类上都不同的海洋浮游植物——假海藻、环状藻、赫克斯利Emiliania huxleyi、长聚球菌（Synechococcus elongatus）和三角褐指藻——甲基汞表观毒性的影响。在初始光密度梯度（OD750）上进行剂量响应实验，并使用非线性回归估计EC50值。log10转化后的EC50值与大多数物种的OD750呈强烈的线性关系，表明了一致的生物量缓冲效应，即较高的细胞密度降低了甲基汞的表观毒性。将回归模型外推到OD = 0，得到的内在的、生物量归一化的EC50值比原始的EC50测量值更紧密地收敛于不同的分类群，揭示了在去除生物量人工影响后共享的生理敏感性范围。对该菌最敏感的菌种是圆环虫（crosphaera carterae）（EC50 = 0.0015 μg/L），对该菌最耐受的菌种是长聚球菌（Synechococcus elongatus）（EC50 = 43.86 μg/L）。利用这些生物量调整后的EC50值构建物种敏感性分布（SSD），据此估计HC5为2.25 × 10−3 μg/L。根据EPA急性标准关系（FAV = 2 × HC5），得出最终急性值（FAV）为4.50 x 10−3 μg/L。这些发现表明，生物量强烈调节甲基汞的表观毒性，生物量调整的EC50值可以作为每个细胞敏感性的有用上限估计。该框架提供了一种可重复的方法来标准化跨分类群的毒性数据，并改善了低生物量条件下污染物敏感性的解释，而无需直接预测原位生态风险。

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引用次数: 0

The influence of environmental factors and phytoplankton blooms on cyphonautes larvae abundance and bryozoan colony development at a kelp farm in central Norway 挪威中部海带养殖场环境因素和浮游植物繁殖对珊瑚虫幼虫丰度和苔藓虫群落发育的影响。

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

Marine environmental research

Pub Date : 2026-01-14 DOI: 10.1016/j.marenvres.2026.107854

G.M. Fragoso , Nalia Hama , Elisabeth Snijder , David Aldridge , Ana R. Borrero-Santiago , Ole Jacob Broch , Geir Johnsen , Yngvar Olsen , Maja Hatlebakk

Seaweed cultivation offers a potentially sustainable solution for biomass production. However, in Norway, biomass quality at kelp farms is affected by biofouling, typically from encrusting bryozoans, such as Membranipora membranacea and Electra pilosa. This study investigated the drivers of bryozoan biofouling at a kelp farm in the coast of central Norway in 2022 and 2023. Environmental variables (temperature, salinity, turbidity, light, nutrients and wind), phytoplankton concentrations (chlorophyll a and size structure), and bryozoan (cyphonautes) larval size, abundance and recruitment on the kelp species, Saccharina latissima, were monitored. Phytoplankton biomass and size structure were monitored because cyphonautes are planktotrophic, therefore, phytoplankton was used as a proxy for food availability. Spring phytoplankton blooms (up to ∼ 6 mg chlorophyll a m⁻³) followed increased irradiance and reduced mixing, with cyphonautes larvae showing two main abundance peaks – in April (∼200–400 ind m⁻³), 1–2 weeks after the onset of the bloom - and in June (∼450 ind m⁻³). Larval abundance was associated with low salinity (value ∼ 32), stratified, fresher coastal waters. Membranipora membranacea larvae were generally more abundant and reached larger sizes (up to 0.6 mm in length) during the spring settlement period (late April–June). Larval size, rather than abundance alone, was most closely related to subsequent colony settlement, highlighting the importance of larval maturity for predicting biofouling risk. Colony abundance, size, and areal coverage were higher in earlier-deployed kelp (October 2022 versus January 2023) and increased exponentially from May (<1 %) to late June (up to 11 %). Recruitment peaked during a sharp increase in temperature (1–2 °C in a few days) and was low during a period with high wind speed (up to 15 m s⁻¹). Our findings demonstrate that food availability, water column stability, rapid temperature increases and cyphonautes size structure are the dominant factors influencing bryozoan biofouling on kelp.

海藻养殖为生物质生产提供了一种潜在的可持续解决方案。然而，在挪威，海藻养殖场的生物量质量受到生物污染的影响，通常来自于苔藓虫的结壳，如膜孔虫和毛线虫。这项研究调查了2022年和2023年挪威中部沿海海带农场苔藓虫生物污染的驱动因素。监测了环境变量（温度、盐度、浊度、光照、营养物和风）、浮游植物浓度（叶绿素a和大小结构）以及苔藓虫（cyphonautes）幼虫的大小、丰度和对海带Saccharina latissima的招募情况。浮游植物的生物量和大小结构被监测，因为浮游生物是浮游营养性的，因此，浮游植物被用作食物供应的代理。春季浮游植物大量繁殖（叶绿素含量高达~ 6 mg / m-3），随之而来的是光照增加和混合减少，cyphonautes幼虫出现了两个主要丰度高峰——在4月（~ 200-400 μ m-3）、繁殖开始后1-2周和6月（~ 450 μ m-3）。幼虫丰度与低盐度（值~ 32）、分层、较新鲜的沿海水域有关。在春季沉降期（4月下旬~ 6月），膜孔虫幼虫数量较多，体长可达0.6 mm。幼虫的大小，而不是丰度，与随后的殖民地定居最密切相关，这突出了幼虫成熟度对预测生物污染风险的重要性。较早部署的海带的群落丰度、大小和面积覆盖率更高（2022年10月比2023年1月），并从5月（-1）开始呈指数增长。研究结果表明，食物的可得性、水柱的稳定性、温度的快速升高和苔藓虫的大小结构是影响海带苔藓虫生物污染的主要因素。

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引用次数: 0

Thermal responses and climate change implications of spring and autumn spawning Patagonian squid (Doryteuthis gahi) embryos 巴塔哥尼亚鱿鱼（Doryteuthis gahi）春季和秋季产卵胚胎的热响应和气候变化影响。

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

Marine environmental research

Pub Date : 2026-01-14 DOI: 10.1016/j.marenvres.2026.107856

Jesse M.A. van der Grient , Barend Stander , Paul Brickle , Simon A. Morley

Ocean warming affects ectotherm physiological and phenological processes, potentially creating mismatches between early life stages and their prey. Seasonal spawning cohorts are thought to provide flexibility in responding to environmental variability, but if there is seasonal adaptation between these cohorts, then they may respond to ocean warming differently, affecting species resilience and potentially impacting the wider food web. We tested the response to warming of egg masses and paralarvae from two spawning cohorts (autumn and spring) of the Patagonian squid (Doryteuthis gahi). Treated egg masses were exposed to a strict warming regime while control eggs were exposed to air temperature-driven temperature changes. Egg mass respiration estimates demonstrated that higher temperatures resulted in higher respiration rates (metabolic processes), although no additional influence of the rate and magnitude of warming was detected. There were differences in paralarvae size and weight, with the treated autumn cohort containing smaller and lighter paralarvae, which could affect larval duration, especially if early hatching times and smaller hatchlings cause mismatches with their prey or increased predation. This suggests that temperature could influence survival and recruitment success. Greater understanding is required of how temperature changes influence squid phenology (e.g., from timing of egg laying to paralarvae growth and survival) and its likely influence on biomass at adult feeding grounds, which are also important fishing grounds. Further targeted studies could improve the prediction of future impacts on marine food webs, indicating if, for example, changing the timing of fishing seasons, in response to environmental cues would be a useful climate adaptation strategy for the Falkland Islands.

海洋变暖影响变温动物的生理和物候过程，潜在地造成早期生命阶段和猎物之间的不匹配。季节性产卵群被认为在应对环境变化方面具有灵活性，但如果这些产卵群之间存在季节性适应，那么它们可能对海洋变暖做出不同的反应，从而影响物种的恢复力，并可能影响更广泛的食物网。我们测试了巴塔哥尼亚鱿鱼（Doryteuthis gahi）的两个产卵群（秋季和春季）的卵群和幼虫对升温的反应。处理过的卵群暴露在严格的升温环境中，而对照卵暴露在空气温度驱动的温度变化中。虫卵质量呼吸估计表明，温度升高导致呼吸速率（代谢过程）加快，尽管没有发现增温速率和幅度的额外影响。幼虫的大小和重量存在差异，处理过的秋季群体含有更小更轻的幼虫，这可能会影响幼虫的持续时间，特别是如果早期孵化和较小的孵化导致与猎物不匹配或捕食增加。这表明温度可能影响生存和招募的成功。需要更好地了解温度变化如何影响鱿鱼物候（例如，从产卵时间到幼虫生长和存活）及其对成虫觅食地（也是重要的渔场）生物量的可能影响。进一步有针对性的研究可以改善对海洋食物网未来影响的预测，例如，根据环境线索改变捕鱼季节的时间对福克兰群岛来说是否是一种有用的气候适应战略。

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引用次数: 0

Enhanced submarine groundwater discharge and nutrient fluxes in response to typhoon events in Zhanjiang Bay, China 湛江湾海底地下水流量和养分通量对台风事件的响应。

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

Marine environmental research

Pub Date : 2026-01-13 DOI: 10.1016/j.marenvres.2026.107851

Ziyang Shi , Fajin Chen , Xiao Chen , Guangzhe Jin , Chao Wang , Machendiranathan Mayakrishnan

Typhoons significantly influence the spatiotemporal dynamics of submarine groundwater discharge (SGD) and associated nutrient fluxes in coastal systems. This study investigates the impact of multiple typhoon events of Typhoons Lionrock and Kompasu on the distribution of ²²²Rn and SGD in Zhanjiang Bay, South China, and evaluates the consequent variations in nutrient (DIP, NO₂⁻ + NO₃⁻, DSi) inputs via SGD. Results show that typhoons induce a substantial increase in SGD fluxes, with peak post-typhoon values reaching up to 8 times pre-typhoon levels, primarily driven by intense rainfall that enhances the inland hydraulic gradient and recharges coastal aquifers. The spatial pattern of ²²²Rn activity shifts from weak pre-typhoon salinity correlation to a strong negative correlation post-typhoon, indicating a dominant contribution of low-salinity, freshwater SGD. Despite significant spatial variability in ²²²Rn, zonal analysis confirms that SGD rates in Zhanjiang Bay fall within the global typical range, with slightly higher values likely due to coarse-grained sediments enhancing permeability. Nutrient fluxes via SGD increase dramatically after typhoons, with DSi, DIP, and NO₂⁻ + NO₃⁻ fluxes rising by 46.54 %, 119.56 %, and 47.51 %, respectively, during the peak event. DSi and NO₂⁻ + NO₃⁻ exhibit conservative behavior and strong correlation with SGD, whereas NO₂⁻ + NO₃⁻ dynamics are complicated by active microbial processes. Notably, SGD-derived nutrient inputs during typhoons may act as the primary driver of nutrient loading and a critical factor in the potential eutrophication of Zhanjiang Bay.

台风对沿海系统海底地下水排放及相关养分通量的时空动态影响显著。研究了台风“狮子”和“康普”对湛江湾222Rn和SGD分布的影响，并评价了SGD对营养物（DIP、NO2- + NO3-、DSi）输入的影响。结果表明，台风导致SGD通量大幅增加，台风后峰值达到台风前水平的8倍，这主要是由于强降雨增强了内陆水力梯度并补充了沿海含水层。222Rn活动的空间格局由台风前的弱盐度相关向台风后的强负相关转变，表明低盐度淡水SGD占主导地位。尽管222Rn的空间变异性显著，但地带性分析证实，湛江湾的SGD速率处于全球典型范围内，可能由于粗粒度沉积物增强了渗透率，SGD速率略高。台风过后，通过SGD的养分通量急剧增加，DSi、DIP和NO2- + NO3-通量在峰值期间分别增加了46.54%、119.56%和47.51%。DSi和NO2- + NO3-表现出保守的行为，与SGD有较强的相关性，而NO2- + NO3-动力学则因活跃的微生物过程而复杂。值得注意的是，台风期间sgd衍生的养分输入可能是养分负荷的主要驱动因素，也是湛江湾潜在富营养化的关键因素。

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引用次数: 0

Assessing the performance of a surface washing agent for oil removal from sand in cold environments 评估一种表面清洗剂在寒冷环境下对砂土除油的性能

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

Marine environmental research

Pub Date : 2026-01-13 DOI: 10.1016/j.marenvres.2026.107852

Jiyao Sui , Huifang Bi , Rengyu Yue , Haiyan Fu , Aili Yang , Chunjiang An

Persistent oil contamination along coastlines can be treated by surface washing agents (SWAs), while low-temperature conditions can significantly impact the effectiveness of SWAs in oil removal. This study investigates the oil removal performance of a commercial SWA for oiled shoreline sand in cold-region environments. Batch oil removal tests were conducted to explore the effectiveness of this SWA under different conditions (i.e., SWA concentration, salinity, humic acid concentration, and kaolinite concentration). The results show that the SWA exhibited high oil removal efficiency even under cold conditions. Higher SWA and kaolinite concentrations were beneficial for oil removal, but humic acid had negative effects on the oil removal performance. In terms of salinity, the oil removal efficiency of SWA first increased (peaking at 1.0 wt%) and then gradually decreased as the salinity increased from 0 to 3.5 wt%. Factorial analysis further revealed that salinity significantly modulates the influence of SWA concentration on oil removal from shoreline sand. This work indicates the great potential of SWA as a spill treating agent for shoreline cleanup, especially in cold regions with increasing risks of oil spills resulting from climate change.

海岸线上的持久性油污可以通过表面清洗剂（SWAs）来处理，而低温条件会显著影响SWAs的除油效果。本研究考察了一种商用SWA在寒冷地区环境下对含油岸线砂的除油性能。进行了批量除油试验，考察了不同条件下（即SWA浓度、盐度、腐植酸浓度和高岭石浓度）该SWA的除油效果。结果表明，即使在低温条件下，SWA也具有较高的除油效率。较高的SWA和高岭石浓度有利于脱油，而腐植酸对脱油性能有不利影响。在盐度方面，随着盐度从0 wt%增加到3.5 wt%， SWA的除油效率先增加（在1.0 wt%时达到峰值），然后逐渐降低。析因分析进一步表明，盐度显著调节SWA浓度对岸线砂除油的影响。这项工作表明，SWA作为海岸线清理的泄漏处理剂具有巨大的潜力，特别是在气候变化导致石油泄漏风险增加的寒冷地区。

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引用次数: 0

Assessment of microbial community changes in seawater of marine cage- culture large yellow croaker (Larimichthys crocea) farms 网箱养殖大黄鱼养殖场海水微生物群落变化评价。

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

Marine environmental research

Pub Date : 2026-01-12 DOI: 10.1016/j.marenvres.2026.107849

Tumusenge Daniel, Chenchen Hu, Shuaiqing Wang, Guangyang Zhang

Microbial communities in aquaculture seawater are fundamental to ecosystem stability and health, serving as critical indicators of environmental change. However, the specific impacts of large-scale marine cage culture on these planktonic communities remain poorly understood. Using 16S and 18S rRNA sequencing, we assessed prokaryotic and eukaryotic communities in seawater from nearshore and offshore large yellow croaker farms, as well as a non-farmed site on Nanji Island, China. Our analysis revealed ecologically notable taxonomic and functional trends, despite overall community composition showing only modest changes. Cage-culture operations were associated with an apparent reduction in eukaryotic diversity alongside enrichment of heterotrophic (Cryothecomonas aestivalis) and parasitic taxa (Syndiniales). In contrast, prokaryotic communities exhibited increased phylogenetic diversity at the offshore farm, suggesting organic enrichment may drive niche diversification. Functionally, core metabolic pathways were largely conserved, though nitrogen and sulfur cycling processes appeared more prominent in the farmed sites. Co-occurrence networks revealed a modular structure, with key associations surviving False Discovery Rate (FDR) correction, characterized by a negative association between oligotrophic and copiotrophic niches. Crucially, the absence of significant biomarkers for classic pathogens, combined with microbial patterns indicative of system stability, suggests that the microbial community in this region may remain balanced despite the presence of aquaculture activity. These findings provide preliminary insights that could inform the management of ecological sustainability in offshore mariculture.

水产养殖海水中的微生物群落是生态系统稳定和健康的基础，是环境变化的重要指标。然而，大规模海洋网箱养殖对这些浮游生物群落的具体影响仍然知之甚少。利用16S和18S rRNA测序技术，对中国南济岛近岸和近海大黄鱼养殖场以及非养殖地点海水中的原核和真核生物群落进行了评估。我们的分析揭示了生态上显著的分类学和功能趋势，尽管总体群落组成只显示出适度的变化。笼培养操作与真核生物多样性的明显减少以及异养（Cryothecomonas aestivalis）和寄生分类群（Syndiniales）的富集有关。相比之下，原核生物群落在近海农场表现出更高的系统发育多样性，表明有机富集可能推动生态位多样化。在功能上，核心代谢途径在很大程度上是保守的，尽管氮和硫循环过程在养殖地点更为突出。共生网络显示出模块化结构，关键关联在错误发现率（FDR）校正后仍然存在，其特征是贫营养生态位和共生生态位之间存在负相关。至关重要的是，缺乏经典病原体的重要生物标志物，再加上表明系统稳定性的微生物模式，表明尽管存在水产养殖活动，该地区的微生物群落可能保持平衡。这些发现为近海海水养殖的生态可持续性管理提供了初步的见解。

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引用次数: 0

Legacy perfluoroalkyl acids and emerging perfluoroalkyl ether carboxylic acids in the atmosphere of Laizhou Bay estuaries: Occurrence, gas–particle partitioning, and potential sources 莱州湾河口大气中遗留的全氟烷基酸和新出现的全氟烷基醚羧酸：赋存状态、气-颗粒分配和潜在来源

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

Marine environmental research

Pub Date : 2026-01-12 DOI: 10.1016/j.marenvres.2026.107850

Hao Sun , Xinchen Miao , Fengfeng Dong , Rong Sun , Xuan Jia , Xing Liu , Zilan Wu , Ziwei Yao , Jiayin Dai , Jianhui Tang , Jianmin Chen , Yitao Pan

This study investigated the occurrence, gas–particle partitioning, and potential sources of legacy perfluoroalkyl acids (PFAAs) and emerging perfluoroalkyl ether carboxylic acids (PFECAs) in the atmospheric estuaries of Laizhou Bay in North China during 2024. The total concentrations of 28 individual per- and polyfluoroalkyl substances (PFAS) ranged from 31.4 to 2340 pg/m³ in the gaseous phase and from 31.0 to 7262 pg/m³ in the particulate phase. The Yellow River estuary exhibited slightly higher atmospheric PFAS pollution levels than the Xiaoqing River estuary. PFECAs dominated both the gaseous (69.2 %) and particulate phases (88.0 %), with concentrations significantly exceeding those of legacy PFAAs. Seasonal variations indicated that particulate PFAS concentrations peaked in winter. However, higher PFAS levels observed during summer at the Yellow River estuary compared with other seasons were attributed to its unique hydrological and meteorological conditions. Gas–particle partitioning analysis revealed that the partition coefficient (Log K_p) of PFECAs exhibited a non-linear “U-shaped” trend with carbon chain length, distinct from the pattern observed for legacy PFAAs. The partitioning behavior of PFECAs differed from that of legacy PFAAs owing to the presence of ether bonds, which altered their fundamental physicochemical properties. The positive matrix factorization model identified five major sources of PFAS in the two estuaries. The similarity in source profiles between the estuaries suggests that PFAS emissions were primarily driven by large-scale, basin-level industrial activities, rather than local geographical variations. The findings underscore the need to include emerging PFECAs in monitoring programs and to develop basin-scale management strategies for PFAS control.

研究了2024年中国北方莱州湾大气河口遗留的全氟烷基酸（PFAAs）和新出现的全氟烷基醚羧酸（ppfecas）的赋存状态、气粒分布和可能来源。28种单氟烷基和多氟烷基物质（PFAS）的总浓度在气相中为31.4至2340 pg/m3，在颗粒相中为31.0至7262 pg/m3。黄河口大气PFAS污染水平略高于小清河河口。PFAAs在气相（69.2%）和颗粒相（88.0%）中均占主导地位，其浓度显著高于传统的PFAAs。季节变化表明，颗粒物PFAS浓度在冬季达到峰值。黄河口夏季PFAS含量高于其他季节，与黄河口独特的水文气象条件有关。气体-颗粒分配分析表明，PFAAs的分配系数（Log Kp）随碳链长度呈非线性“u”型趋势，与传统PFAAs不同。由于存在醚键，PFAAs的分配行为与传统PFAAs不同，这改变了它们的基本物理化学性质。正矩阵分解模型确定了两个河口PFAS的5个主要来源。河口之间源剖面的相似性表明，PFAS排放主要是由大规模的流域级工业活动驱动的，而不是由当地的地理变化驱动的。研究结果强调需要将新出现的pfeca纳入监测计划，并制定PFAS控制的流域规模管理策略。

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引用次数: 0

First evidence of climate-driven modulation of octinoxate toxicity in the sea urchin Paracentrotus lividus 第一个气候驱动的海胆（Paracentrotus lividus）中辛酸盐毒性调节的证据。

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

Marine environmental research

Pub Date : 2026-01-10 DOI: 10.1016/j.marenvres.2026.107847

Dinis Costa , Diana Bordalo , Marta Cunha , Amadeu M.V.M. Soares , Susana Carvalho , Rosa Freitas

Although the use of ultraviolet (UV) filters in personal care products is steadily increasing, their ecological consequences remain poorly characterized despite evidence of persistence and bioaccumulation in marine systems. In parallel, climate change stressors such as rising temperatures and fluctuations in salinity are known to modulate the toxicity of contaminants and the physiological tolerance of marine organisms. The combined action of these factors can intensify biological stress, highlighting the need for studies that evaluate pollutant effects under realistic multi-stressor scenarios. This study investigated the biochemical effects of octinoxate (also known as ethylhexyl methoxycinnamate, EHMC), a widely used organic UV filter, on the sea urchin Paracentrotus lividus under environmentally relevant conditions. A 28-day laboratory exposure was conducted using three EHMC concentrations (50, 500, and 5000 ng/L) under control conditions (17 °C, salinity 35) and climate change scenarios (21 °C, salinity 40). Multiple biomarkers were analysed, including metabolic activity, antioxidant and biotransformation responses, redox balance, cellular damage, and neurotoxicity. Results showed that the biochemical responses of P. lividus were significantly influenced by environmental conditions. Combined exposure to EHMC and elevated temperature (21 °C) induced marked oxidative stress, metabolic alterations, and shifts in detoxification responses. These effects were less pronounced under increased salinity, though still detectable. The present findings emphasize the heightened vulnerability of marine invertebrates to chemical pollutants under climate stress. Furthermore, the present study highlights the importance of integrating multiple stressors into ecotoxicological assessments and supports the use of bioindicator species, such as P. lividus, for more realistic environmental risk evaluations. Given that UV filters remain understudied contaminants and that data on their effects in echinoderms are still almost nonexistent, this work provides a timely contribution and highlights a critical knowledge gap that warrants urgent scientific attention.

尽管个人护理产品中紫外线过滤器的使用正在稳步增加，但尽管有证据表明其在海洋系统中具有持久性和生物蓄积性，但其生态后果仍不清楚。与此同时，已知气温上升和盐度波动等气候变化压力因素会调节污染物的毒性和海洋生物的生理耐受性。这些因素的共同作用可能会加剧生物应激，因此需要研究在现实的多应激源情景下评估污染物的影响。本研究研究了广泛应用的有机紫外滤光剂桂皮酸酯（又称乙基己基甲氧基肉桂酸酯，EHMC）在环境相关条件下对海胆lividus的生化影响。在对照条件（17°C，盐度35）和气候变化情景（21°C，盐度40）下，使用三种EHMC浓度（50、500和5000 ng/L）进行了为期28天的实验室暴露。分析了多种生物标志物，包括代谢活性、抗氧化和生物转化反应、氧化还原平衡、细胞损伤和神经毒性。结果表明，环境条件对鹅毛草的生化反应有显著影响。同时暴露于EHMC和升高的温度（21°C）诱导了明显的氧化应激、代谢改变和解毒反应的转变。在盐度增加的情况下，这些影响不那么明显，但仍然可以检测到。目前的研究结果强调，在气候压力下，海洋无脊椎动物对化学污染物的脆弱性增加。此外，本研究强调了将多种应激源整合到生态毒理学评估中的重要性，并支持使用生物指示物种（如lividus）进行更现实的环境风险评估。鉴于紫外线过滤器对污染物的研究尚不充分，而且关于它们对棘皮动物的影响的数据几乎还不存在，这项工作提供了及时的贡献，并突出了一个关键的知识缺口，需要紧急的科学关注。

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引用次数: 0