Regional Studies in Marine Science最新文献_第2页

Coastal dynamics along the Northern Coast of Java, Indonesia: Scales, impacts, and governance strategies 印度尼西亚爪哇北部海岸的沿海动态：规模、影响和治理策略

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-01-31 DOI: 10.1016/j.rsma.2026.104825

Tubagus Solihuddin , Hadiwijaya L. Salim , Semeidi Husrin , Terry L. Kepel , Adi Prasetyo , Mohammad Farid

The North Coast of Java, the most developed region in Indonesia, has recently undergone environmental degradation primarily due to uncontrolled exploitation and significant changes in land cover, resulting in coastal erosion, accretion, flooding, and land subsidence. This study aims to quantify shoreline changes, assess their impact on land cover, and suggest governance strategies. The study utilized integrated multispectral bands from satellite imagery alongside the digital shoreline analysis system to evaluate shoreline changes and conduct statistical measurements based on satellite data. Sayung in Demak, Central Java, exemplifies a highly eroded coastline, with a maximum linear regression rate of −289.2 m/yr. The total lengths of eroded and accreted shorelines along the North Coast of Java are approximately 1305.3 km and 678.7 km, respectively. The total areas of eroded and accreted shorelines are documented as 162.1 km² and 130.1 km², respectively. Human activities, including river modifications and mangrove removal, significantly disrupt natural coastal dynamics, affecting erosion and accretion processes. Furthermore, coastal structures (ports, breakwaters, groins, seawalls, and jetties) significantly influence the dynamic of the coastline and are strongly linked to rapid development in urban areas. The North Coast of Java also experiences sea level rise and land subsidence, which exacerbates coastal flooding in specific areas. Based on the findings, a coordinated institution at the national level (North Coast of Java Authority) is necessary to tackle the complexity of coastal management and in setting the new regulatory framework regarding the initiative of giant seawall constructions along the North Coast of Java.

爪哇北海岸是印度尼西亚最发达的地区，最近由于不受控制的开发和土地覆盖的重大变化，导致海岸侵蚀、增生、洪水和地面沉降，导致了环境退化。本研究旨在量化海岸线变化，评估其对土地覆盖的影响，并提出治理策略。该研究利用卫星图像的综合多光谱波段和数字海岸线分析系统来评估海岸线变化，并根据卫星数据进行统计测量。中爪哇Demak的Sayung是一个高度侵蚀的海岸线，其最大线性回归速率为- 289.2 m/yr。爪哇北海岸的侵蚀海岸线和增生海岸线的总长度分别约为1305.3 km和678.7 km。被侵蚀的海岸线面积为162.1 km²，被淤积的海岸线面积为130.1 km²。人类活动，包括河流改造和红树林移除，严重破坏了自然海岸动态，影响了侵蚀和增生过程。此外，沿海结构（港口、防波堤、沟、海堤和码头）显著影响海岸线的动态，并与城市地区的快速发展密切相关。爪哇北部海岸也经历了海平面上升和地面下沉，这加剧了特定地区的沿海洪水。根据调查结果，有必要在国家一级建立一个协调一致的机构（爪哇北海岸管理局），以解决沿海管理的复杂性，并就爪哇北海岸建造巨型海堤的倡议制定新的管理框架。

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引用次数: 0

Projecting the future of Canada’s ocean resources for a Blue Economy 为蓝色经济预测加拿大海洋资源的未来

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.rsma.2026.104813

Pedro C. González-Espinosa , Mohammad Nasir Tighsazzadeh , Helena Julietta Debus , Muhammed A. Oyinlola , William W.L. Cheung , Gabriel Reygondeau , Andrés M. Cisneros-Montemayor

The Blue Economy promotes ocean-based sectors that support social equity, environmental sustainability, and lasting economic development, and Canada is currently developing a national ocean strategy to meet these goals. However, climate change is reshaping ecosystems by altering variables like water temperatures, oxygen levels, acidity, sea levels, wind, and current patterns, with direct consequences for sectors that rely on ocean resources. This study projects the future availability of marine resources in Canada for fisheries, mariculture, ocean energy, blue carbon, and ecotourism, with a focus on regional differences and impacts on coastal communities that depend on them. Across Canada’s Pacific, Arctic, and Atlantic coasts, results indicate mixed outcomes depending on the region and climate scenario. By the end of the century, compared to today, mean changes in resource potential under a low-emissions scenario (SSP1–2.6) are projected to range from approximately + 1 % to + 18 %, while under a high-emissions scenario (SSP5–8.5), from approximately −7 % to + 38 %, depending on the region. Nationally, average availability is projected to rise by 5.7 % (SSP1–2.6) and 8.6 % (SSP5–8.5). However, these averages obscure severe, localised declines, particularly in parts of the Arctic and East Coast, where resource availability could decrease by up to 50 %. Such declines could directly affect the livelihoods of approximately 6000 people, primarily in Indigenous communities, employed in the fisheries and aquaculture sectors. These findings demonstrate the need for local, regional, and national adaptive climate-resilient policy frameworks that prioritise support for coastal communities, foster inclusive leadership, promote equity in benefits and responsibilities, and ensure the long-term sustainability of ocean-dependent livelihoods and ecosystems.

蓝色经济促进支持社会公平、环境可持续性和持久经济发展的海洋部门，加拿大目前正在制定一项国家海洋战略以实现这些目标。然而，气候变化正在通过改变水温、含氧量、酸度、海平面、风和洋流模式等变量来重塑生态系统，对依赖海洋资源的部门产生直接影响。本研究预测了加拿大渔业、海水养殖、海洋能源、蓝碳和生态旅游等海洋资源的未来可用性，重点关注了区域差异及其对依赖这些资源的沿海社区的影响。在加拿大的太平洋、北极和大西洋沿岸，结果显示出不同地区和气候情景的混合结果。到本世纪末，与今天相比，在低排放情景（SSP1-2.6）下，预计资源潜力的平均变化范围约为+ 1 %至+ 18 %，而在高排放情景（SSP5-8.5）下，根据区域的不同，变化范围约为- 7 %至+ 38 %。在全国范围内，平均可用性预计将上升5.7% % （SSP1-2.6）和8.6% % （SSP5-8.5）。然而，这些平均值掩盖了严重的局部下降，特别是在北极和东海岸的部分地区，那里的资源可用性可能减少高达50% %。这种下降可能直接影响主要在土著社区从事渔业和水产养殖部门工作的大约6000人的生计。这些发现表明，需要建立地方、区域和国家的气候适应性政策框架，优先支持沿海社区，培养包容性领导，促进利益和责任的公平，并确保依赖海洋的生计和生态系统的长期可持续性。

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引用次数: 0

Spatio-temporal changes of Chlorophyll-a over the Eastern Mediterranean: Investigation of shipping, wildfires and dust events 东地中海地区叶绿素a的时空变化：航运、野火和沙尘事件的调查

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-02-19 DOI: 10.1016/j.rsma.2026.104858

Muhittin Gunes Onay , Serra Saracoglu , Elif Pehlivanoglu , Burcak Kaynak

This study examines the effect of maritime activity, wildfires, and dust storms on phytoplankton growth and presents a comprehensive five-year spatio-temporal assessment of Chl-a levels across the study area covering the Sea of Marmara, the Aegean Sea, and the Eastern Mediterranean, including coastal and open sea areas. Investigations utilizing GCOM retrievals revealed areas and intervals of increased Chl-a levels. A novel quantitative method was developed to categorize open sea areas based on shipping intensity, demonstrating a significant association between high shipping activity and elevated Chl-a concentrations for the first time in the literature. The association was particularly remarkable during times of limited phytoplankton growth in the Eastern Mediterranean. In addition, three specific episodes focusing on one anthropogenic (shipping-livestock) and two natural sources (wildfire and dust) were selected for the investigation of high Chl-a concentrations in open sea. Dust episode exhibited the most widespread and intense Chl-a increase, followed by wildfire episode with lower Chl-a increase. On the other hand, livestock episode indicated more localized, but intense increases. These natural and anthropogenic factors elevated Chl-a levels compared to pre- and post-event periods. These findings underlined the crucial role of overlooked shipping activities on phytoplankton dynamics in open seas. Natural events such as wildfires and dust storms are anticipated to occur more frequently and severely in the Mediterranean due to climate change, highlighting the need for efforts to quantify and mitigate shipping activities that might contribute to algal blooms.

本研究考察了海洋活动、野火和沙尘暴对浮游植物生长的影响，并对整个研究区域（包括马尔马拉海、爱琴海和地中海东部，包括沿海和公海）的Chl-a水平进行了五年的时空综合评估。利用GCOM检索的调查显示了Chl-a水平升高的区域和间隔。我们开发了一种新的定量方法，根据航运强度对公海进行分类，首次在文献中证明了高航运活动与高Chl-a浓度之间的显著关联。在东地中海浮游植物生长有限的时期，这种联系尤为显著。此外，还选择了三个具体事件，重点是一个人为来源（船舶-牲畜）和两个自然来源（野火和灰尘），以调查公海高Chl-a浓度。沙尘期Chl-a增加范围最广、强度最大，其次是野火期，Chl-a增加幅度较小。另一方面，牲畜事件表明更局部但强烈的增加。与事件前后相比，这些自然和人为因素使Chl-a水平升高。这些发现强调了被忽视的航运活动对公海浮游植物动态的关键作用。由于气候变化，预计野火和沙尘暴等自然事件将在地中海更频繁、更严重地发生，这突出表明有必要努力量化和减轻可能导致藻华的航运活动。

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引用次数: 0

Modeling the decision-making trigger for autonomous ship collision avoidance via imitating human social cognitive process 基于人类社会认知过程的船舶自主避碰决策触发器建模

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-02-11 DOI: 10.1016/j.rsma.2026.104852

Shaobo Wang , Lianbo Li , Xiaohui Wang , Hongkai Wang , Wengang Mao

Maritime Autonomous Surface Ships (MASS) require collision avoidance decision triggers that align with human cognitive patterns to ensure safe coexistence with manned vessels. Current threshold-based triggers suffer from instability caused by the uncertainty of ship relative motion and instantaneous parameter fluctuations, and the simple comparison manner lacks the cognitive characteristics of human decision-making. This paper proposes VDDM-CADT (Variable Drift Diffusion Model for Collision Avoidance Decision Trigger), which transforms instantaneous collision risk parameters (DDV, TDV, distance) into accumulated evidence over time. Drawing from cognitive neuroscience, the model employs a drift-diffusion process where evidence accumulates until reaching variable decision boundaries shaped by time pressure. Analysis of three simulation cases demonstrates that VDDM-CADT produces stable triggers under parameter fluctuations and ship motion, with decision timings showing high consistency with experienced ship officers. Unlike conventional threshold methods, this evidence-based approach exhibits the social cognitive characteristic inherent to human judgment, potentially enabling MASS to demonstrate socially interpretable behavior patterns during encounters with conventional vessels.

海上自主水面舰艇（MASS）需要符合人类认知模式的避碰决策触发器，以确保与有人驾驶船舶安全共存。当前基于阈值的触发器存在船舶相对运动的不确定性和瞬时参数波动带来的不稳定性，简单的比较方式缺乏人类决策的认知特征。本文提出了VDDM-CADT （Variable Drift Diffusion Model for Collision Avoidance Decision Trigger）模型，该模型将瞬时碰撞风险参数（DDV、TDV、距离）转化为随时间累积的证据。该模型借鉴认知神经科学，采用漂移-扩散过程，证据不断积累，直到达到由时间压力形成的可变决策边界。三个仿真实例分析表明，VDDM-CADT在参数波动和船舶运动下产生稳定的触发器，决策时间与经验丰富的船舶驾驶员具有较高的一致性。与传统的阈值方法不同，这种基于证据的方法展示了人类判断固有的社会认知特征，可能使MASS在遇到传统血管时展示社会可解释的行为模式。

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引用次数: 0

Organophosphate triesters and diesters in surface waters and sediments of an urbanized river in Eastern China: Spatial patterns and ecological implications 中国东部城市化河流地表水和沉积物中有机磷三酯和二酯的空间格局及其生态意义

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-01-28 DOI: 10.1016/j.rsma.2026.104819

Haibin Sun , Yuanren Liang , Qingwei Bu , Lei Yang , Jianfeng Tang , Yaoyang Xu

In aquatic ecosystems, tri-organophosphate esters and their di-metabolites are commonly found and may present significant ecological risks. Nonetheless, there is still a scarcity of data regarding the contamination characteristics and how OPEs and their metabolites partition at the interface between sediment and water. This research aimed to examine the spatial variation, interface exchange, and diffusion processes of 13 tri-OPEs and 5 di-OPEs within the surface water and sediment of the Yong River, which is situated in heavily urbanized regions of eastern China. The concentration levels of tri-OPEs in the aquatic environment ranged from 428.84 to 4024.01 ng/L, whereas concentrations of di-OPEs spanned from 92.6 to 440.39 ng/L. The most prevalent category of contaminants identified were Chlorinated OPEs. In the sediment, the concentration levels varied from 0.16 to 2400.5 ng/g (dw), with tributyl phosphate (TnBP) being the primary constituent. Fugacity fraction analysis indicates that most OPEs, including TMP, TEP, and TCEP, are likely to migrate into the water phase. Others, such as TiBP, TBEP, TCIPP, and TPHP, tend to maintain equilibrium at the sediment-water interface. The composition of the compound in terms of carbon atom count and the level of soot carbon present in the sediment significantly influence the dispersal patterns of OPEs. The analysis of potential sources revealed that the main contributors to tri-OPEs stemmed from discharges linked to wastewater treatment facilities and various industrial processes. Conversely, di-OPEs emerged primarily from industrial manufacturing and the breakdown of tri-OPEs. The analysis of ecological risks across multiple levels indicated that tris(1,3-dichloro-2-propyl) phosphate (TDCP) represents a minimal threat to aquatic ecosystems. These results can provide insights into the dynamics of OPE and their metabolites within urban river water ecosystems that experience significant human influence.

在水生生态系统中，三有机磷酸酯及其二代谢物普遍存在，并可能带来重大的生态风险。尽管如此，关于污染特征以及OPEs及其代谢物如何在沉积物和水之间的界面上分配的数据仍然缺乏。研究了位于中国东部高度城市化地区的永河地表水和沉积物中13种三组分和5种二组分的空间变化、界面交换和扩散过程。水体环境中三opes的浓度范围为428.84 ~ 4024.01 ng/L，二opes的浓度范围为92.6 ~ 440.39 ng/L。所确定的最普遍的污染物类别是氯化环氧乙烷。在沉积物中，浓度水平在0.16 ~ 2400.5 ng/g （dw）之间变化，以磷酸三丁酯（TnBP）为主要成分。逸度分数分析表明，大多数OPEs（包括TMP、TEP和TCEP）都可能迁移到水相。其他的，如TiBP， TBEP， TCIPP和TPHP，倾向于在沉积物-水界面保持平衡。化合物的碳原子数组成和沉积物中烟灰碳的含量显著影响OPEs的扩散模式。对潜在来源的分析显示，三种有机磷的主要来源是与废水处理设施和各种工业过程有关的排放。相反，二业务主要来自工业制造业和三业务的分解。多层面生态风险分析表明，三磷酸（1,3-二氯-2-丙基）对水生生态系统的威胁最小。这些结果可以深入了解城市河流生态系统中OPE及其代谢物的动态，这些生态系统受到人类的显著影响。

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引用次数: 0

Species-specific bioaccumulation of toxic metals in coastal seaweeds from the northeast Bay of Bengal: Implications for human health risk 孟加拉湾东北部沿海海藻中有毒金属的物种特异性生物积累：对人类健康风险的影响

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.rsma.2026.104841

Md. Biplob Hasan , Md. Mushfiqur Rahman , Arnob Ghosh , Swachsa Rahman , Mahmudul Hasan , Md. Habibullah-Al-Mamun , Mir Shariful Islam

Seaweed is an ecologically and economically valuable marine resource, yet its capacity to bioaccumulate toxic metals raise concerns for both human health and marine ecosystems. This study assessed the concentrations of eight toxic heavy metals – arsenic (As), lead (Pb), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), manganese (Mn), and mercury (Hg) – in nine seaweed species collected from the the southeast coast of Bangladesh located in the northeast Bay of Bengal. Metal concentrations were quantified using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Significant variations in metal accumulation were observed among the species. Sargassum flavicans exhibited extremely high arsenic levels (94.97 mg/kg), exceeding safety limits by over 30 times, while Dictyota sp. recorded the highest mercury concentration (0.35 mg/kg), indicating site-specific contamination. Hypnea boergesenii showed elevated Cr, Cu, and Pb levels, suggesting its potential as a bioindicator. Notably, Gracilaria tenuistipitata and Enteromorpha intestinalis accumulated high levels of As and Mn, while Ulva lactuca had the lowest As and Pb concentrations, implying relatively cleaner conditions. Hazard Index (HI) revealed no significant non-carcinogenic risks (HI < 1), though arsenic-related total carcinogenic risks (TCR) were identified in several species (TCR > 1 ×10⁻⁴). Multivariate statistical analyses, including Principal Component Analysis (PCA), Hierarchical Cluster Analysis (HCA), and Pearson’s correlation matrix, indicated that metal accumulation patterns were influenced by both anthropogenic inputs and species-specific bioaccumulation traits. These findings emphasize the need for regular monitoring and the establishment of safety guidelines for seaweed harvesting and consumption. As global demand for seaweed grows, addressing contamination risks is critical for protecting public health and preserving marine biodiversity.

海藻是一种具有生态和经济价值的海洋资源，但其生物积累有毒金属的能力引起了对人类健康和海洋生态系统的关注。本研究评估了八种有毒重金属——砷（As）、铅（Pb）、镉（Cd）、钴（Co）、铬（Cr）、铜（Cu）、锰（Mn）和汞（Hg）——在孟加拉湾东北部孟加拉国东南海岸采集的九种海藻中的浓度。采用电感耦合等离子体质谱（ICP-MS）测定金属浓度。在不同的物种中观察到金属积累的显著差异。黄马尾藻的砷含量极高（94.97 mg/kg），超过安全限值30倍以上，而Dictyota sp的汞浓度最高（0.35 mg/kg），表明存在特定地点的污染。波氏海参的Cr、Cu和Pb水平升高，提示其作为生物指标的潜力。值得注意的是，江蓠和肠Enteromorpha unteinalis积累了较高的As和Mn浓度，而Ulva lactuca的As和Pb浓度最低，表明环境相对清洁。危害指数（HI）显示没有显著的非致癌风险（HI < 1），尽管砷相关的总致癌风险（TCR）在几个物种中被确定（TCR > 1 ×10−4）。主成分分析（PCA）、层次聚类分析（HCA）和Pearson相关矩阵等多元统计分析表明，金属积累模式受人为输入和物种特异性生物积累性状的影响。这些发现强调需要定期监测和制定海藻收获和消费的安全准则。随着全球对海藻需求的增长，解决污染风险对于保护公众健康和保护海洋生物多样性至关重要。

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引用次数: 0

Deep coastal sediments of the Persian Gulf: A potential sink for microplastic pollution 波斯湾深海岸沉积物：微塑料污染的潜在汇

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-02-21 DOI: 10.1016/j.rsma.2026.104871

Mitra Zarei Zafarabadi , Farideh Amini-Birami , Behnam Keshavarzi , Rosa Busquets , Mohammad Ali Hamzeh

Microplastic (MP) pollution represents a serious hazard to marine ecosystems. The present study investigated the distribution, abundance, and properties of MPs in coastal sediments along Bandar-Abbas city (∼ 25 km) in the northern Persian Gulf. Samples were obtained from 24 sites at two depths (0 to ∼ 20 cm and ∼ 20 to ∼ 40 cm) to gather information about historical pollutions. MP concentrations were significantly higher in deep sediments (58.40 ± 27.87 particles/kg) than in surface sediments (41.58 ± 20.25 particles/kg) (p < 0.05) and were also higher at locations near wastewater outlets (128.66 ± 27.97 particles/kg) compared to more distant locations (90.44 ± 39.43 particles/kg) (p < 0.05). No significant differences (p < 0.05) were observed in MP concentrations between intertidal and supratidal zone samples, nor between industrial and urban areas. Fibers were the dominant MP type (> 88 % of the total), followed by fragments and films. The dominance of colored and large MPs (1000 ≤ L< 5000 µm) in deep sediments is indicative limited physical weathering at depth. Polyamide (PA) and polyethylene terephthalate (PET) were the most abundant polymer types identified. The results highlight the evolution of MP contamination in coastal area and accentuate the necessity of an effective plan to reduce its impact on marine ecosystems.

微塑料污染是对海洋生态系统的严重危害。本研究调查了波斯湾北部Bandar-Abbas市（~ 25 km）沿岸沉积物中MPs的分布、丰度和性质。在两个深度（0 ~ ~ 20 cm和~ 20 ~ ~ 40 cm）的24个地点采集样本，收集历史污染信息。MP浓度明显高于深层沉积物(58.40 ± 27.87粒子/公斤)比表面沉积物(41.58 ± 20.25粒子/公斤)(p & lt; 0.05)和附近的位置也高废水网点(128.66 ± 27.97粒子/公斤)相比更遥远的地方(90.44 ± 39.43粒子/公斤)(p & lt; 0.05)。潮间带和潮上带样本之间，工业地区和城市地区之间，MP浓度没有显著差异（p <； 0.05）。纤维是主要的MP类型（> 88 %），其次是片段和薄膜。深部沉积物中有色大MPs（1000 ≤L< 5000 µm）占优势，说明深部物理风化作用有限。聚酰胺（PA）和聚对苯二甲酸乙二醇酯（PET）是最丰富的聚合物类型。研究结果强调了沿海地区MP污染的演变，并强调了制定有效计划以减少其对海洋生态系统影响的必要性。

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引用次数: 0

Acute microbial and nutrient responses to elevated temperature and pCO2: A coastal UK microcosm study 急性微生物和营养反应升高的温度和二氧化碳分压：沿海英国的微观研究

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-01-27 DOI: 10.1016/j.rsma.2026.104814

Lukas Marx , Michelle Hale , B.B. Cael , Sarah Reynolds

The coastal ocean’s ecosystem resilience is consistently hampered by the compounding impacts of projected climate change and anthropogenic perturbation. In this microcosm study, we investigated how elevated temperature and pCO₂, together with episodic nutrient pollution and a short-term marine heatwave, affect the nano- and picoplanktonic community of primary producers and subsequent changes in coastal biogeochemistry. Our study demonstrates that future elevated temperature and pCO₂ conditions impact the planktonic community, first by a ∼ 50 % decreased autotrophic abundance, and second by a shift from larger eukaryotic to smaller cells. When combined with a heatwave, total primary producers experienced an additional 37–38 % decrease, indicative of a negative synergistic effect beyond either stressor alone. Picoeukaryotes were particularly sensitive, declining by 44–50 %. Short-term nutrient pollution under ambient conditions induced a 41 % increase in cell abundance, but failed to stimulate biomass under elevated temperature and pCO₂, and instead led to altered organic matter dynamics, including significantly lower carbon fixation. These findings emphasize the need for further evaluation of multi-stressor interactions to better understand biogeochemical vulnerability, nutrient retention, and ecological functioning in coastal ecosystems undergoing rapid climatic and anthropogenic change.

沿海海洋生态系统的恢复能力一直受到预测的气候变化和人为干扰的复合影响的阻碍。在这个微观世界的研究中，我们研究了温度升高和二氧化碳分压升高，以及偶发性营养污染和短期海洋热浪如何影响初级生产者的纳米和微浮游生物群落以及随后的沿海生物地球化学变化。我们的研究表明，未来升高的温度和pCO2条件会影响浮游生物群落，首先是自养丰度降低~ 50% %，其次是从较大的真核细胞向较小的细胞转变。当与热浪相结合时，初级生产者的产量又减少了37 - 38% %，这表明除了单独的压力源之外，还有负面的协同效应。微真核生物尤其敏感，下降了44 - 50% %。环境条件下的短期营养污染导致细胞丰度增加41% %，但在温度升高和二氧化碳分差升高的情况下不能刺激生物量，而是导致有机质动力学改变，包括碳固定显著降低。这些发现强调需要进一步评估多应激源相互作用，以更好地了解经历快速气候和人为变化的沿海生态系统的生物地球化学脆弱性、营养保留和生态功能。

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引用次数: 0

A snapshot on picoplanktonic Synechococcus dynamics in a sensitive Mediterranean marine ecosystem, İskenderun Bay, Northeastern Mediterranean 地中海东北部İskenderun湾敏感的地中海海洋生态系统中微浮游聚藻球菌的动态快照

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-02-21 DOI: 10.1016/j.rsma.2026.104873

Sevim Polat , Tuba Terbıyık Kurt , Sinan Mavruk , Fethi Bengil

Picoplanktonic organisms are important components of the food web in marine ecosystems. Despite their small size, they contribute significantly to primary production. As phytoplankton communities are projected to shift from large to small species with warming, it is critical to include different size groups in projections of the impacts of warming on marine ecosystems. The Mediterranean Sea, among the most oligotrophic waters globally, has pronounced effects of warming due to its semi-closed structure. İskenderun Bay is a unique habitat in the northeastern Mediterranean characterized by relatively high primary production. In this study, the dynamics of picoplanktonic Synechococcus in İskenderun Bay were investigated between March 2010 and February 2011. Phytoplankton abundance, chl-a and physico-chemical parameters were also measured. Additionally, satellite-based sea surface temperature (SST) data from 2003 to 2023 were analyzed to understand thewarming trend in the area. Synechococcus abundance in the surface water was found between 0.53 × 10⁴ and 9.88 × 10⁴ cells ml⁻¹ and between 0.70 × 10⁴ and 5.96 × 10⁴ cells ml⁻¹ in the subsurface depths. Synechococcus abundance showed significant seasonal variations, with high values in summer and autumn. Moreover, the analysis revealed a notable upward trend in surface temperature in the region over the period 2003–2023. The temperature increased by about 0.6°C every ten years on average. The observed warming trend suggests that these processes may further influence picoplankton dynamics in the northeastern Mediterranean. Despite providing only a snapshot of Synechococcus dynamics from 2010 to 2011, this study provides a valuable basis for future research to understand the long-term impacts of warming on microbial communities.

微浮游生物是海洋生态系统食物网的重要组成部分。尽管规模小，但它们对初级生产的贡献很大。由于预计浮游植物群落将随着气候变暖从大型物种向小型物种转变，因此在预测变暖对海洋生态系统的影响时，包括不同大小的群落是至关重要的。地中海是全球营养不良最严重的水域之一，由于其半封闭的结构，气候变暖的影响非常明显。İskenderun海湾是地中海东北部一个独特的栖息地，其特点是初级产量相对较高。本研究于2010年3月至2011年2月对İskenderun湾微浮游聚藻球菌的动态进行了调查。测定了浮游植物丰度、chl-a和理化参数。此外，对2003 - 2023年的卫星海表温度（SST）数据进行了分析，以了解该地区的变暖趋势。地表水的聚囊球菌丰度在0.53 × 104 ~ 9.88 × 104 cells ml - 1之间，次表层的聚囊球菌丰度在0.70 × 104 ~ 5.96 × 104 cells ml - 1之间。聚珠球菌丰度表现出明显的季节变化，夏季和秋季丰度最高。2003-2023年，该地区地表温度呈明显上升趋势。气温平均每十年上升约0.6°C。观测到的变暖趋势表明，这些过程可能进一步影响地中海东北部的浮游生物动态。尽管该研究仅提供了2010年至2011年聚珠球菌动态的快照，但该研究为进一步研究变暖对微生物群落的长期影响提供了有价值的基础。

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引用次数: 0

Trace element accumulation in green turtles (Chelonia mydas) foraging in locations of differing chemical input 不同化学物质输入环境下绿海龟觅食过程中微量元素的积累

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-03-01 Epub Date: 2026-01-28 DOI: 10.1016/j.rsma.2026.104817

Nicole B. Rowberry , Arthur D. Barraza , Colin J. Limpus , Jason P. van de Merwe , Kimberly A. Finlayson

Green sea turtles (Chelonia mydas) have high ecological, economic and cultural importance, and their high fidelity to foraging grounds and long lifespan make them good bioindicators of trace element pollution. Trace elements accumulate in green turtles through food, and are linked with disease and abnormalities. Previous studies suggest higher concentrations of trace elements within inshore locations, closer to anthropogenic activities and coastal run-off, compared to remote offshore sites. This project investigated trace element accumulation in blood of green turtles foraging in locations of differing chemical input. Blood was collected from green turtles foraging at three sites: Port Curtis (adjacent to industrial port), Heron Reef (adjacent to tourist resort and research station), and Hoskyn/Fairfax reefs (remote offshore reefs). The blood was acid digested and analysed using ICP-MS for trace element concentrations. Concentrations of individual elements were statistically analysed for differences between locations, and a principal components analysis was used to assess multivariate differences between locations. Trace element concentrations were also compared to reference intervals (RIs) from the literature. Antimony, cobalt, manganese, and molybdenum concentrations were significantly higher in Port Curtis turtles, and elevated above the reference intervals. Arsenic, selenium and cadmium were significantly higher in both offshore locations compared to Port Curtis, and elevated above reference intervals. Vanadium was significantly higher in Hoskyn/Fairfax turtles, and elevated above reference intervals. Principal component analyses found a distinct separation between Port Curtis and the Capricorn Bunker, as well as some separation between Heron and Hoskyn/Fairfax reefs. The higher concentrations of elements in turtle blood compared to the reference intervals, and other global populations, demonstrates natural and anthropogenic sources of elements are accumulating in these green turtles at elevated levels, with suspected risk to their health and the health of the marine environment.

绿海龟（Chelonia mydas）具有很高的生态、经济和文化价值，对觅食地的保真度高，寿命长，是良好的微量元素污染生物指标。微量元素通过食物在绿海龟体内积累，并与疾病和异常有关。先前的研究表明，与偏远的近海地点相比，靠近人类活动和沿海径流的近海地点的微量元素浓度更高。本项目研究了绿海龟在不同化学输入地点觅食时血液中微量元素的积累情况。在三个地点采集绿海龟的血液：柯蒂斯港（毗邻工业港）、鹭礁（毗邻旅游胜地和研究站）和霍斯金/费尔法克斯珊瑚礁（偏远的近海珊瑚礁）。血酸消化后用ICP-MS测定微量元素浓度。个别元素的浓度被统计分析不同地区之间的差异，并使用主成分分析来评估不同地区之间的多变量差异。微量元素浓度也与文献中的参考区间（RIs）进行了比较。在柯蒂斯港龟中，锑、钴、锰和钼的浓度显著高于参考区间。与柯蒂斯港相比，这两个近海地点的砷、硒和镉含量明显高于参考区间。在Hoskyn/Fairfax龟中，钒含量显著高于参考区间。主成分分析发现，柯蒂斯港和摩羯座地堡之间存在明显的分离，苍鹭礁和霍斯金/费尔法克斯礁之间也存在一定的分离。与参考区间和其他全球种群相比，海龟血液中的元素浓度较高，这表明这些绿海龟体内的自然和人为元素来源正在以较高的水平积累，可能对它们的健康和海洋环境的健康构成风险。

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引用次数: 0