Marine environmental research最新文献_第4页

Seismic acquisition causes substantial decrease in catch rates of commercially-important fish 地震采集导致具有重要商业价值的鱼类捕捞率大幅下降

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

Marine environmental research

Pub Date : 2026-01-27 DOI: 10.1016/j.marenvres.2026.107886

Ian A. Knuckey , Matt Koopman , Brendan Kelaher , Russell B. Millar , Paul E. McShane

High intensity noise associated with seismic surveys of the sea floor can cause harm or alter the behaviour of aquatic animals. In south eastern Australia, a marine seismic survey (MSS) acquisition area overlapped with commercial fishing grounds on which eastern school whiting (Sillago flindersi) and tiger flathead (Platycephalus richardsoni) are targeted. To assess the effect on commercial catch rates of a MSS, commercial Danish seine vessels were deployed in stratified random surveys of seismic acquisition areas and adjacent control areas within a 11,000 km² fishing ground. Despite the considerable natural spatial and temporal variation in catch rates of each fish species, catch rates were reduced by 99 % for whiting and by 75 % for flathead immediately following the MSS compared with control areas. Significant negative impacts were observed to persist for at least 10 months for whiting. Although randomized survey data were not available from before the MSS, a M-BACI analysis of commercial logbook data in the years preceding and up to 10 months post seismic acquisition revealed a significant reduction in the catch rates of whiting, but not flathead. Cooperative fleet dynamics may have contributed to hyperstability of catch rates masking MSS effects on flathead. The lack of observed mortalities or visible physiological or morphological abnormalities for fish caught post-MSS indicates that either fish moved out of the MSS acquisition area or otherwise avoided capture. Overall, our results demonstrate that impacts of MSS on fisheries can range from negligible to substantial, depending on the species, location and extent of overlap of the MSS acquisition area with fishing grounds.

与海底地震调查有关的高强度噪音可能造成伤害或改变水生动物的行为。在澳大利亚东南部，一个海洋地震调查（MSS）采集区与商业渔场重叠，那里的目标是东部白鳕（Sillago flindersi）和平头虎（Platycephalus richardsoni）。为了评估MSS对商业捕捞率的影响，丹麦商业围网船在11,000平方公里渔场内的地震采集区和邻近控制区进行了分层随机调查。尽管每种鱼类的捕捞率在自然空间和时间上都有相当大的变化，但与对照区相比，在MSS之后，白头鱼的捕捞率下降了99%，平头鱼的捕捞率下降了75%。观察到明显的负面影响持续至少10个月。虽然没有MSS之前的随机调查数据，但对地震采集前几年和地震采集后10个月的商业日志数据进行的M-BACI分析显示，白斑捕获率显著降低，但平头捕获率没有下降。合作船队动力学可能有助于捕获率的超稳定性，掩盖了平头船的MSS效应。在MSS后捕获的鱼没有观察到死亡率或明显的生理或形态异常，这表明鱼要么离开了MSS获取区域，要么以其他方式避免捕获。总体而言，我们的研究结果表明，MSS对渔业的影响可以从微不足道到巨大，这取决于MSS获取区域与渔场的物种、位置和重叠程度。

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引用次数: 0

Resilience of the macroalgae Gongolaria barbata under ocean acidification: physiological responses and restoration perspective 海洋酸化条件下大型藻的恢复力：生理响应与恢复视角

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

Marine environmental research

Pub Date : 2026-01-27 DOI: 10.1016/j.marenvres.2026.107887

Ilaria D'Aniello , Maria Nardiello , Carmen Arena , Denis Badocco , Alberto Barausse , Alberto Colletti , Roberto Danovaro , Erika Fabbrizzi , Marta Formentin , Simonetta Fraschetti , Folco Giomi , Valerio Matozzo , Isabella Moro , Katiuscia Petrosillo , Chiara Silvestrini , Ermenegilda Vitale , Marco Munari

The increasing CO₂ concentration is a major cause of the climate change phenomenon. Concurrently, the same increase is leading to ocean acidification (OA), which is projected to decrease seawater pH by 0.4 units by 2100. Here we investigated the potential impacts of OA on the canopy-forming brown macroalga Gongolaria barbata from the Venice Lagoon. One-year-old individuals were maintained in mesocosms under two pH levels: 8.1 (current ambient value) and 7.7 (the end-of-the-century value predicted under the current scenario of anthropogenic CO₂ emissions). The physiological responses of the algae were assessed during the experiment in terms of oxygen production and consumption, and maximal PSII photochemical efficiency. At the end of the experiment, we analyzed the percentage of mature receptacles, algal growth rate and the total polyphenolic content and antioxidant capacity as indicators of the stress response. The significant decrease in polyphenolic content indicates the impairment of the defence mechanisms, which could make the algae more vulnerable to grazing under acidified conditions. Yet, conversely, our results suggest that changes in pH levels do not significantly affect the physiological processes, growth or fertility of the algae. These findings suggest that while OA may weaken defence mechanisms, the preservation of physiological and reproductive functions would still support the potential of G. barbata populations from the Venice Lagoon to act as donor sources for restoration efforts, highlighting their resistance to the acidified conditions expected in the future.

二氧化碳浓度的增加是气候变化现象的主要原因。与此同时，同样的增长正在导致海洋酸化（OA），预计到2100年将使海水pH值降低0.4个单位。本文研究了OA对威尼斯潟湖形成树冠的褐色巨藻（gonolaria barbata）的潜在影响。一岁大的个体被维持在两种pH水平下的中生态环境中：8.1（当前环境值）和7.7（在当前人为二氧化碳排放情景下预测的世纪末值）。在实验期间，对藻类的生理反应进行了评估，包括产氧量和耗氧量，以及最大PSII光化学效率。在试验结束时，我们分析了成熟容器百分比、藻类生长速度、总多酚含量和抗氧化能力作为胁迫响应的指标。多酚含量的显著降低表明防御机制受损，这可能使藻类在酸化条件下更容易受到放牧。然而，相反，我们的研究结果表明，pH值的变化不会显著影响藻类的生理过程、生长或繁殖。这些发现表明，虽然OA可能会削弱防御机制，但保留生理和生殖功能仍将支持威尼斯泻湖G. barbata种群作为恢复工作的供体来源的潜力，突出了它们对未来酸化条件的抵抗力。

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引用次数: 0

Distribution and partitioning of metals in surface sediments of a coastal river dominated ecosystem: Insights to geochemical fractionation, sources and ecological risk 沿海河流主导生态系统表层沉积物中金属的分布和分配：地球化学分异、来源和生态风险的启示

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

Marine environmental research

Pub Date : 2026-01-27 DOI: 10.1016/j.marenvres.2026.107892

Fiona Bassy William , Prasanna Mohan Viswanathan , Nagarajan Ramasamy , Chidambaram Sabarathinam , Vetrimurugan Elumalai

Riverine is the most vital ecosystem, which serves numerous important benefits to their locality, and it undergoes various chemical reactions that influence coastal water composition, nutrient cycling and broader geochemical processes. In this research, geochemical fractionation of metals with respect to the spatial distribution in the Miri River was examined. Initially, pXRF survey was conducted to understand the spatial variability of metal concentrations in the river sediments. Subsequently, selected sediment samples in the vulnerable zones (upstream, mid-stream and downstream) were collected and extracted into different geochemical phases via sequential extraction method, and analysed for metal concentrations. From the pXRF results, the order of dominance of metals are as follows: Fe > Zn > Pb > Cr > Ni > Cu > Mn > Cd, in which the higher concentration of metals was observed in the downstream and upstream sections of the river. From the sequential extraction, most of the metals are associated with residual, Fe-Mn oxides and organic matter fractions, as absorbed phases with less mobile and less readily available condition. Factor analysis also confirms that Fe-Mn oxyhydroxides was the major geochemical phase to absorb metals from various sources including anthropogenic activities and chemical weathering. Various pollution indices have been used to assess the potential ecological risk of the river sediments. All the indices revealed the contamination level of river sediments, particularly the elevated concentration of Cd and Ni. From this study, sequential extraction offers insights into the fractionation, availability, and mobility of metals, which can aid in evaluating environmental contamination in the river.

河流是最重要的生态系统，它为当地提供了许多重要的利益，它经历了各种化学反应，影响沿海水的组成、营养循环和更广泛的地球化学过程。在这项研究中，金属的地球化学分异相对于在美里江的空间分布进行了研究。首先，通过pXRF调查了解河流沉积物中金属浓度的空间变异性。随后，在脆弱带（上游、中游和下游）选取沉积物样本，采用顺序萃取法提取不同地球化学相，分析金属浓度。从pXRF结果来看，金属的优势顺序为：Fe > Zn > Pb > Cr > Ni > Cu > Mn > Cd，其中下游和上游的金属含量较高。从顺序萃取中，大多数金属与残余、Fe-Mn氧化物和有机物组分相结合，作为吸收相，流动性较差，不易获得。因子分析也证实了铁锰氧化氢氧化物是主要的地球化学相，吸收各种来源的金属，包括人为活动和化学风化。利用各种污染指数对河流沉积物的潜在生态风险进行了评价。所有指标都反映了河流沉积物的污染程度，特别是Cd和Ni的浓度升高。从这项研究中，顺序提取提供了对金属的分异、可用性和流动性的见解，这有助于评估河流中的环境污染。

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引用次数: 0

Habitat suitability model for predicting the occurrence of scleractinian cold-water corals in the Gulf of Naples (Tyrrhenian Sea): A tool for restoration planning and governance of deep-sea ecosystems 那不勒斯湾（第勒尼安海）冷珊瑚生境适宜性预测模型：深海生态系统恢复规划和治理的工具。

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

Marine environmental research

Pub Date : 2026-01-25 DOI: 10.1016/j.marenvres.2026.107879

Fabio Di Giovanna , Giorgio Castellan , Michela Angiolillo , Vincenzo Botte , Simonetta Fraschetti , Valentina Grande , Daniele Iudicone , Florian Kokoszka , Paolo Montagna , Mariacristina Prampolini , Giorgio Simone , Marco Taviani , Maria Letizia Vitelletti , Federica Foglini

Cold-water corals (CWCs) are key ecosystem engineers in deep-sea habitats, yet their distribution in the Gulf of Naples remains poorly known. Here, we applied a Maximum Entropy (MaxEnt) model with high-resolution environmental predictors to investigate the fine-scale suitability of scleractinian CWCs within the Gulf of Naples and adjacent areas. Presence records were derived from Remotely Operated Vehicles (ROV) video analyses, while predictors included bottom current velocity from a Regional Ocean Modeling System (ROMS) simulation and geomorphological variables from multibeam bathymetry (bathymetric position index, slope, roughness, aspect, and backscatter).

The model predicted ∼0.43 km² of suitable habitat (suitability index >0.6) corresponding to 0.09 % of the entire study area, mainly along canyon walls and elevated seabed features of the Dohrn Canyon. Additional suitable areas were identified in the deeper canyon sectors and south of Ischia Island. Current velocity at the bottom influenced the most our model, with high suitability values obtained from 0.10 to 0.18 m/s, suggesting these as favorable conditions for sediment removal and food supply. The variable response curves documented that Bathymetric position index and roughness contributed to the model, with preferences for elevated seabed features and heterogeneous seafloor topography.

These findings highlight the role of bottom current velocity and topographic complexity in shaping CWCs habitats in the study region and reveal unexplored areas with high potential for coral occurrence. Model outputs provide a scientific basis for Natura 2000 site designation and support conservation and restoration strategies for vulnerable deep-sea ecosystems in the area.

冷水珊瑚（CWCs）是深海栖息地的关键生态系统工程师，但它们在那不勒斯湾的分布仍然鲜为人知。在这里，我们应用了一个具有高分辨率环境预测因子的最大熵（MaxEnt）模型来研究那不勒斯湾及其邻近地区的核裂性ccs的精细尺度适用性。存在记录来自远程操作车辆（ROV）视频分析，而预测因素包括来自区域海洋建模系统（ROMS）模拟的海底流速和来自多波束测深的地貌变量（测深位置指数、坡度、粗糙度、纵横向和后向散射）。该模型预测了约0.43 km2的适宜生境（适宜度指数>.6），占整个研究区的0.09%，主要沿多恩峡谷的峡谷壁和高架海底特征分布。在更深的峡谷部分和Ischia岛南部确定了其他合适的区域。底部流速对我们的模型影响最大，在0.10至0.18 m/s之间获得了很高的适宜性值，表明这些是沉积物去除和食物供应的有利条件。变量响应曲线记录了水深位置指数和粗糙度对模型的影响，并优先考虑了高架海底特征和不均匀海底地形。这些发现突出了海底流速和地形复杂性在研究区域内形成CWCs栖息地的作用，并揭示了尚未开发的具有高珊瑚发生潜力的区域。模型输出为自然2000站点指定提供了科学依据，并为该地区脆弱的深海生态系统的保护和恢复策略提供了支持。

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引用次数: 0

Rapid evolution of marine phytoplankton under global change: mechanisms, constraints, and ecological consequences 全球变化下海洋浮游植物的快速进化：机制、制约因素和生态后果

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.2026.107885

Siyu Luan, Peixuan Liu, Bin Huang, Enqi Zhang, Junyan Li, Shuming Lin, Zihong Li, Tian Shen, Meimei He, Zexu Li, Jianrong Xia, Peng Jin

Marine phytoplankton are the foundation of oceanic food webs and play a pivotal role in global carbon cycling. As climate change accelerates, rising temperatures, ocean acidification, and nutrient stress impose unprecedented selective pressures on these organisms. Emerging evidence from experimental evolution, genomic studies, and modeling suggests that phytoplankton can undergo rapid adaptation over ecological timescales. Here, we synthesize current knowledge on the mechanisms of rapid evolution in marine phytoplankton, including phenotypic plasticity, standing genetic variation, and polyploidization. We highlight the interplay between short-term plastic responses and long-term genetic adaptation, and explore how these processes are constrained by metabolic trade-offs and evolutionary limits. Furthermore, we examine the ecological and biogeochemical consequences of rapid evolution, emphasizing feedbacks to primary production and global biogeochemical cycles. Finally, we discuss emerging methodological frameworks for predicting evolutionary responses under multi-stressor scenarios and propose key research priorities to integrate evolutionary dynamics into global change models.

海洋浮游植物是海洋食物网的基础，在全球碳循环中起着关键作用。随着气候变化的加速，气温上升、海洋酸化和营养压力对这些生物施加了前所未有的选择压力。来自实验进化、基因组研究和建模的新证据表明，浮游植物可以在生态时间尺度上经历快速适应。本文综述了海洋浮游植物快速进化的机制，包括表型可塑性、常值遗传变异和多倍体化。我们强调短期可塑性反应和长期遗传适应之间的相互作用，并探讨这些过程如何受到代谢权衡和进化限制的约束。此外，我们研究了快速进化的生态和生物地球化学后果，强调了对初级生产和全球生物地球化学循环的反馈。最后，我们讨论了预测多压力情景下进化反应的新兴方法框架，并提出了将进化动力学整合到全球变化模型中的关键研究重点。

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引用次数: 0

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