Regional Studies in Marine Science最新文献_第9页

Safeguarding coastal health: Marine pollution as a catalyst of food insecurity and ecological risk in Island nations 保护沿海健康：海洋污染是岛屿国家粮食不安全和生态风险的催化剂

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-20 DOI: 10.1016/j.rsma.2026.104758

Qunyu Chen , Dale Stain

Marine pollution threatens food security and ecological integrity in China’s coastal and near-shore regions(CCNR), yet quantitative evidence linking pollutant pathways to health outcomes remains limited. This study presents original empirical analysis of marine pollution impacts across major Chinese coastal provinces (Shandong, Jiangsu, Zhejiang, Fujian, Guangdong, and Hainan) using a One Health framework. We conducted systematic data collection between 2022 and 2024, including: (i) seafood contaminant measurements (n = 847 samples; heavy metals via ICP-MS, microplastics via FTIR spectroscopy) from artisanal fishing sites and aquaculture facilities; (ii) 312 structured household surveys measuring food security indicators; (iii) spatial analysis of pollution entry points using satellite imagery and port authority records; and (iv) comparative policy assessment across all six nations using semi-structured interviews with 48 government officials and environmental managers.Results demonstrate that microplastics (detected in 73 % of samples, mean 4.2 particles/g) and heavy metals (lead: 0.34 mg/kg; mercury: 0.18 mg/kg; both exceeding WHO limits in hotspot areas) constitute primary contamination vectors, with significant inter-island variation (p < 0.001). Port proximity emerged as the strongest predictor of contamination (OR=3.8, 95 % CI: 2.1–6.9), followed by inadequate wastewater infrastructure (OR=2.4). Food-borne disease incidence correlates positively with contamination levels (r = 0.67, p < 0.01), with aquaculture and artisanal fisheries jointly explaining 64 % of community-level exposure variance. Integrated multi-trophic aquaculture (IMTA) systems achieved 45–67 % nutrient load reductions while maintaining 89 % of baseline yields. Gear-marking initiatives reduced abandoned fishing gear by 52 % across pilot sites. Veterinary-monitored AMR surveillance in aquaculture reduced antibiotic resistance prevalence by 38 % over 18 months.Cost-effectiveness analysis reveals that bundled interventions—combining wastewater upgrades (USD 2.3 M per island), IMTA conversion pilots (USD 450 K), gear-marking programs (USD 120 K), and AMR surveillance systems (USD 85 K annually)—offer economically viable pathways to simultaneously improve food safety, protect coastal ecosystems, and enhance community resilience in China's coastel and near-shore regions contexts.

海洋污染威胁着中国沿海和近岸地区（CCNR）的粮食安全和生态完整性，但将污染物途径与健康结果联系起来的定量证据仍然有限。本研究采用“一个健康”框架对中国主要沿海省份（山东、江苏、浙江、福建、广东和海南）的海洋污染影响进行了初步实证分析。我们在2022年至2024年期间进行了系统的数据收集，包括：(i)对来自手工渔场和水产养殖设施的海产品污染物进行测量（n = 847个样本；ICP-MS检测重金属，FTIR光谱检测微塑料）；测量粮食安全指标的312项结构住户调查；（iii）利用卫星图像和港务局记录对污染进入点进行空间分析；（iv）通过对48名政府官员和环境管理者的半结构化访谈，对所有六个国家的政策进行比较评估。结果表明，微塑料（在73% %的样品中检测到，平均4.2个颗粒/g）和重金属（铅：0.34 mg/kg；汞：0.18 mg/kg；均超过热点地区的世卫组织限制）是主要的污染载体，岛屿间差异显著（p <； 0.001）。港口邻近是污染的最强预测因子（OR=3.8, 95 % CI: 2.1-6.9），其次是污水处理基础设施不足（OR=2.4）。食源性疾病发病率与污染水平呈正相关（r = 0.67,p <； 0.01），水产养殖和手工渔业共同解释了社区水平暴露方差的64 %。综合多营养水产养殖（IMTA）系统实现了45-67 %的营养负荷减少，同时保持了89 %的基线产量。渔具标记计划使试验点的废弃渔具减少了52% %。兽医监测的水产养殖业抗菌素耐药性监测在18个月内将抗生素耐药性流行率降低了38% %。成本效益分析表明，在中国沿海和近岸地区，将污水升级（每个岛屿2.3 万美元）、IMTA转换试点（450 万美元）、装备标记项目（120 万美元）和抗菌素耐药性监测系统（每年85 万美元）结合起来的一揽子干预措施，为同时改善食品安全、保护沿海生态系统和增强社区抵御能力提供了经济上可行的途径。

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引用次数: 0

Under-recognized impacts of abandoned, lost, and discarded fishing gear on threatened marine wildlife in the remote Andaman Islands, Bay of Bengal: A baseline study 在孟加拉湾偏远的安达曼群岛，被遗弃、丢失和丢弃的渔具对濒危海洋野生动物的影响尚未得到充分认识：一项基线研究

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-10 DOI: 10.1016/j.rsma.2026.104770

Venkatesan Shiva Shankar , Neelam Purti , Pradip Panda , Kalyan De

Abandoned, lost, or otherwise discarded fishing gear (ALDFG) poses a significant threat to marine biodiversity globally, yet its impacts in remote island ecosystems remain poorly documented. This study provides the first baseline assessment of ALDFG interactions with threatened marine megafauna in the Andaman Islands, Bay of Bengal, using observations collected between 2020 and 2025. A total of 147 interactions were documented, of which sea turtles accounted for 88.4 % (n = 130). Olive Ridley turtles represented 69.2 % of turtle cases (n = 90) and Green turtles 28.5 % (n = 37), while Hawksbill and Leatherback turtles constituted the remaining 2.3 % (n = 3). Overall, 82.3 % of entangled turtles (n = 107) were rescued alive. Other affected taxa included the Andaman water monitor lizard (5.4 %, n = 8), Saltwater Crocodile (4.8 %, n = 7), and Dugong (1.4 %, n = 2). Fishing nets were responsible for 96.6 % of all interactions, with ropes accounting for the remaining 3.4 %. While many animals were successfully rescued (76.2 %, n = 112), several were found dead (23.8 %, n = 35) due to entanglement. These findings highlight the pervasive and under-reported threat of ALDFG to vulnerable marine fauna in the Andaman Islands. Mitigating ALDFG impacts requires a combination of improved gear reporting and retrieval systems, strengthened regulatory enforcement, capacity building of local fishing communities, and community-based monitoring to prevent gear loss and enhance conservation outcomes. Therefore, immediate policy interventions, coupled with awareness and engagement of local fishing communities, are essential to conserve marine wildlife in this ecologically sensitive region.

被遗弃、丢失或以其他方式丢弃的渔具（ALDFG）对全球海洋生物多样性构成重大威胁，但其对偏远岛屿生态系统的影响仍缺乏文献记载。本研究利用2020年至2025年收集的观测资料，首次对孟加拉湾安达曼群岛的ALDFG与濒危海洋巨型动物的相互作用进行了基线评估。共记录147次相互作用，其中海龟占88.4 % （n = 130）。榄蠵龟龟代表69.2 %的龟箱(n = 90)和绿海龟28.5 % (n = 37),而玳瑁和棱皮龟构成剩余的2.3 % (n = 3)。总体而言，82.3 %的缠结海龟（n = 107）获救。其他影响类群包括安达曼水巨蜥(5.4 % n = 8),盐水鳄鱼(4.8 % n = 7),和儒艮(1.4 % n = 2)。渔网占所有相互作用的96.6% %，绳索占剩余的3.4% %。虽然许多动物成功获救（76.2 %,n = 112），但由于缠结，一些动物被发现死亡（23.8 %,n = 35）。这些调查结果突出表明，安达曼群岛的ALDFG对脆弱的海洋动物构成了普遍而未被报道的威胁。减轻ALDFG的影响需要改进渔具报告和检索系统、加强监管执法、地方渔业社区的能力建设以及以社区为基础的监测相结合，以防止渔具损失和提高保护成果。因此，立即采取政策干预，加上当地渔业社区的意识和参与，对于保护这一生态敏感地区的海洋野生动物至关重要。

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引用次数: 0

Spatio-temporal assessment of shoreline retreat and future vulnerability of Mousuni Island, West Bengal, India 印度西孟加拉邦穆苏尼岛海岸线退缩及未来脆弱性的时空评价

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-15 DOI: 10.1016/j.rsma.2026.104782

Kiran Jalem , Sagar Kumar Swain , Debdas Mandal

Shoreline retreat poses a significant threat to coastal systems, that are highly vulnerable to climatic and hydrodynamic variability. However, long-term studies linking past changes with future shoreline projections are still limited in many deltaic regions. This study evaluates the spatio-temporal shoreline dynamics of Mousuni Island, West Bengal, over the past four decades (1980–2023) using multi-temporal Landsat imagery and DSAS-based coastal vulnerability assessment framework (DSAS 5.0). Shoreline dynamics were analysed along 1541 transects using five indicators, such as End Point Rate (EPR), Linear Regression Rate (LRR), Weighted Linear Regression (WLR), Net Shoreline Movement (NSM), and Shoreline Change Envelope (SCE). The analysis revealed erosion as the dominant process, affecting nearly 90 % of the island’s perimeter. The mean shoreline retreat was −4.36 m/yr, with extreme erosion rates reaching −23.55 m/yr in the southern and northwestern high-risk zones, whereas limited accretion occurred in northeastern pockets, with a maximum gain of + 2.81 m/yr. Between 1980 and 2023, Mousuni Island lost approximately 19.3 % of its land area, with peak erosion (2.28 km²) during 1990–2000. Forecasting using Kalman Filter model projects further shoreline retreat of 500–700 m by 2043, reinforcing the island’s high vulnerability under sediment deficit, cyclonic pressure, and declining vegetation buffers. The model provides robust estimates, though these include uncertainty related to data resolution and natural variability. Model validation confirmed WLR as the most reliable metric for long-term shoreline prediction. The study’s novelty lies in integrating historical erosion patterns with future risk projections, providing a replicable framework for deltaic island vulnerability assessment. These findings offer valuable insights for nature-based solutions, strategic embankment design, and the development of climate-resilient coastal management frameworks.

海岸线退缩对沿海系统构成了重大威胁，这些系统极易受到气候和水动力变化的影响。然而，在许多三角洲地区，将过去的变化与未来海岸线预测联系起来的长期研究仍然有限。利用多时相Landsat影像和基于DSAS的海岸脆弱性评估框架（DSAS 5.0），对西孟加拉邦穆苏尼岛近40年（1980-2023年）的海岸线时空动态进行了评价。采用终点率（End Point Rate， EPR）、线性回归率（Linear Regression Rate， LRR）、加权线性回归（Weighted Linear Regression， WLR）、净岸线运动（Net Shoreline Movement， NSM）和岸线变化包络度（Shoreline Change Envelope， SCE） 5个指标对1541个样带的岸线动态进行了分析。分析显示，侵蚀是主要的过程，影响了近90% %的岛屿周长。平均海岸线后退为- 4.36 m/yr，南部和西北部高风险带的极端侵蚀速率达到- 23.55 m/yr，而东北部口袋发生有限的增加，最大增加为+ 2.81 m/yr。在1980年至2023年间，穆苏尼岛损失了大约19.3% %的土地面积，在1990年至2000年期间，侵蚀达到了峰值（2.28 平方公里）。利用卡尔曼滤波模型预测，到2043年，海岸线将进一步后退500-700 米，加强了该岛在泥沙损失、气旋压力和植被缓冲减少下的高度脆弱性。该模型提供了可靠的估计，尽管其中包括与数据分辨率和自然变率相关的不确定性。模型验证证实了WLR是长期海岸线预测最可靠的度量。该研究的新颖之处在于将历史侵蚀模式与未来风险预测相结合，为三角洲岛屿脆弱性评估提供了一个可复制的框架。这些发现为基于自然的解决方案、战略性堤防设计和气候适应性沿海管理框架的发展提供了宝贵的见解。

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引用次数: 0

Developing a geometric mean-based disaster vulnerability index (DVI): A holistic approach for quantifying multiplicative vulnerability to riverbank erosion in coastal Bangladesh 建立基于几何均值的灾害脆弱性指数（DVI）：一种量化孟加拉国沿海地区河岸侵蚀的多重脆弱性的整体方法

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-15 DOI: 10.1016/j.rsma.2026.104774

Arabe Khan , Md Mahmudul Hasan Rakib , Irteja Hasan , Fairuj Islam , Devlina Saha Aishee , Arafat Islam Pranto , Zitu Kundu , Raian Islam Evan , Rahat Khan , Dhiman Kumer Roy

Disaster vulnerability primarily due to riverbank erosion is one of the most critical concerns of coastal communities living alongside the riverbanks. This study aims to develop the Disaster Vulnerability Index (DVI) by adopting a geometric mean approach to comprehensively assess community vulnerability to riverbank erosion. The DVI is mainly composed of four contributory factors: hazard, exposure, sensitivity, and resilience. These factors are integrated to provide a more nuanced understanding of vulnerability and identify the most influential indicators for evaluating vulnerability. The research was conducted in Manpura Upazila, a highly vulnerable riverine island in Bangladesh, and assessed the vulnerability across its four unions (Dakkhin Sakuchia, Hazirhat, Monpura, and Uttar Sakuchia). The results indicate significant spatial variation in DVI values, highlighting Dakkhin Sakuchia as the most vulnerable union (0.554), followed by Hazirhat (0.499), Monpura (0.470), and Uttar Sakuchia (0.311). It is generally the localized exposure and hazard factors combined with differentiated social and economic sensitivity that influence household resilience capacity and livelihood sustainability, which generally explains this variation in disaster vulnerability. The predominant factors driving higher vulnerability include frequent erosion events, proximity of settlements to riverbanks, significant agricultural losses, and insufficient healthcare, education, and disaster preparedness. The newly developed DVI employs the geometric mean approach to effectively capture the multiplicative interactions among indicators, providing a nuanced, context-sensitive measure of vulnerability. So, this study offers policymakers and disaster management authorities a robust tool to prioritize targeted interventions and allocate resources effectively, aiming to mitigate risks and enhance resilience against riverbank erosion in vulnerable communities.

灾害脆弱性主要是由于河岸侵蚀，这是居住在河岸沿岸的沿海社区最关心的问题之一。本研究旨在采用几何平均方法建立灾害脆弱性指数（DVI），以综合评估社区对河岸侵蚀的脆弱性。DVI主要由四个因素组成：危害、暴露、敏感性和恢复力。将这些因素综合起来，以便更细致地了解脆弱性，并确定评估脆弱性的最具影响力的指标。这项研究是在孟加拉国一个高度脆弱的河流岛屿曼普拉岛进行的，并评估了其四个联盟（Dakkhin Sakuchia, Hazirhat， Monpura和Uttar Sakuchia）的脆弱性。结果表明，各地区DVI值存在显著的空间差异，其中达克津樱花最脆弱（0.554），其次是Hazirhat（0.499）、Monpura（0.470）和Uttar Sakuchia（0.311）。一般来说，局部暴露和灾害因素加上不同的社会和经济敏感性影响家庭的复原能力和生计可持续性，这通常解释了这种灾害脆弱性的差异。导致脆弱性增加的主要因素包括频繁的侵蚀事件、定居点靠近河岸、重大的农业损失以及医疗、教育和防灾准备不足。新开发的DVI采用几何平均方法来有效地捕捉指标之间的乘法相互作用，提供细致入微的、对环境敏感的脆弱性衡量。因此，本研究为政策制定者和灾害管理当局提供了一个强有力的工具，以确定有针对性的干预措施的优先顺序，并有效分配资源，旨在减轻风险，增强脆弱社区对河岸侵蚀的抵御能力。

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引用次数: 0

Valuation of marine litter upcycling for sustainable resource circulation in Korea 韩国海洋垃圾升级循环对可持续资源循环的评价

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-16 DOI: 10.1016/j.rsma.2026.104780

Hyunji Lee , Tongjoo Suh

Marine litter poses severe ecological and societal challenges, yet most research on its management has emphasized technological recycling or engineering approaches. This study investigated marine litter upcycling as a pollution mitigation strategy, focusing on its broader value dimensions and social acceptance. A comprehensive framework encompassing environmental, social, cultural, design, and economic attributes was developed, using a conjoint-based public survey in Seoul and Busan, South Korea. Using rank-ordered logit models, the relative importance of attributes was estimated and the willingness to pay for upcycling initiatives was quantified. Environmental and design-related attributes were consistently the strongest drivers of preference, whereas economic costs exerted a negative effect. Cultural values are particularly salient in coastal regions, reflecting maritime identity, whereas inland residents emphasize environmental, social, cultural, and design aspects, though with less intensity in cultural dimensions, and exhibit greater price sensitivity. Gender and education heterogeneity were also evident: women and highly educated respondents placed greater importance on environmental and design benefits, whereas men attached stronger value to cultural dimensions. Households expressed a clear willingness to provide support for marine litter upcycling initiatives, highlighting its societal legitimacy and potential contribution to marine pollution mitigation. Overall, the results demonstrate the influence of marine litter upcycling in enhancing broader marine litter management efforts and its potential as a sustainable resource innovation driving circular economy transitions. The findings further suggest opportunities for integrating upcycling into broader policy frameworks, as part of regional marine litter action plans and international cooperative initiatives for sustainable coastal governance.

海洋垃圾带来了严重的生态和社会挑战，但大多数关于其管理的研究都强调技术回收或工程方法。本研究调查了海洋垃圾升级回收作为一种污染缓解策略，重点关注其更广泛的价值维度和社会接受度。通过在韩国首尔和釜山进行的联合公众调查，开发了一个包含环境、社会、文化、设计和经济属性的综合框架。使用秩序logit模型，估计了属性的相对重要性，并量化了为升级回收计划付费的意愿。环境和设计相关的属性一直是最强烈的偏好驱动因素，而经济成本则产生负面影响。文化价值在沿海地区尤其突出，反映了海洋身份，而内陆居民则强调环境、社会、文化和设计方面，尽管文化维度的强度较低，并且表现出更大的价格敏感性。性别和教育的异质性也很明显：女性和受过高等教育的受访者更重视环境和设计效益，而男性更重视文化维度。家庭明确表示愿意为海洋垃圾升级回收倡议提供支持，强调其社会合法性和对减轻海洋污染的潜在贡献。总体而言，研究结果表明了海洋垃圾升级回收在加强更广泛的海洋垃圾管理工作方面的影响，以及其作为可持续资源创新推动循环经济转型的潜力。研究结果进一步表明，有机会将升级回收纳入更广泛的政策框架，作为区域海洋垃圾行动计划和国际可持续沿海治理合作倡议的一部分。

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引用次数: 0

Corrigendum to “Summer ichthyoplankton assemblages and their environmental drivers in the Sinop Peninsula, Southern Central Black Sea” [Reg. Stud. Mar. Sci. 94 (2026) 104769] “黑海中南部锡诺普半岛夏季浮游鱼群及其环境驱动因素”的勘误表[修订版]。钉。科学通报。94 (2026)104769]

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-20 DOI: 10.1016/j.rsma.2026.104791

Orçin Uygun , Levent Bat , Murat Dağtekin , Funda Üstün

引用次数: 0

How the interannual and seasonal variability in connectivity to ITF and its relation to ENSO events in the Halmahera Sea: A modeling approach and observation Halmahera海与ITF连通性的年际和季节变率及其与ENSO事件的关系：建模方法和观测

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-21 DOI: 10.1016/j.rsma.2026.104792

Muhammad Zainuddin Lubis , Song Hu , Andrean V.H. Simanjuntak , Angga Dwinovantyo , Ekoué Ewane Blaise Arnold , Husnul Kausarian , Punyawi Jamjareegulgarn , Made Wedanta Suryadarma

Understanding circulation dynamics in the Halmahera Sea (HS) is essential for clarifying the interactions between El Niño and La Niña events and ITF variability, which significantly impacts the global climate. Despite studies on air-sea interactions in the HS, gaps remain regarding interannual and seasonal variability, leading to uncertainties in understanding ocean circulation and throughflow dynamics. Specifically, there is a lack of understanding of how seasonal temperature and salinity shifts influence the strength and direction of ocean currents in the HS region. This study investigated how temperature and salinity variations during interannual and different seasons affect ocean current patterns in the HS. We used the CROCO model from 2019 to 2023 and observed it in September 2021. Our findings indicate distinct interannual patterns in SST, with the northwest monsoon SST ranging from approximately 28.3–29.8°C and the southeast monsoon SST ranging from approximately 26.8–29.0°C. The SSS varied between approximately 34.1 and 34.6 PSU, with the maximum mean water mass transport in the subsurface recorded at −0.5479 ± 0.6583 Sv at 0.5°S, indicating transport toward the Banda Sea. The SSH ranged from ∼0.69 to ∼0.73 m in the northwest and ∼0.66 to ∼0.69 m in the southeast monsoon. The densities at the surface, subsurface, and intermediate layers were 22.5, 25.5, and 26.5

σ_{ѳ}

. This research advances our understanding of the factors affecting HS circulation dynamics and their responses to El Niño and La Niña events, paving the way for Indo-Pacific water exchange studies.

了解Halmahera海（HS）环流动力学对于阐明El Niño和La Niña事件与ITF变率之间的相互作用至关重要，ITF变率对全球气候有重要影响。尽管对高通量海气相互作用进行了研究，但在年际和季节变化方面仍然存在空白，导致对海洋环流和通流动力学的理解存在不确定性。具体而言，缺乏对季节性温度和盐度变化如何影响高热带地区洋流强度和方向的了解。本文研究了年际和不同季节的温度和盐度变化对海流模式的影响。我们使用了2019年至2023年的CROCO模型，并在2021年9月进行了观测。西北季风海温在28.3 ~ 29.8°C之间，东南季风海温在26.8 ~ 29.0°C之间。SSS变化在34.1 ~ 34.6 PSU之间，在0.5°S时，最大平均地下水量为−0.5479 ± 0.6583 Sv，表明向班达海输送。西北的海平面高度为~ 0.69 ~ ~ 0.73 m，东南季风的海平面高度为~ 0.66 ~ ~ 0.69 m。表层、次表层和中间层的密度分别为22.5、25.5和26.5 σ 。本研究促进了我们对HS环流动力学的影响因素及其对El Niño和La Niña事件的响应的认识，为印太水交换研究铺平了道路。

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引用次数: 0

Population structure and connectivity of Octopus mimus: A complementary approach to enhance management of a benthic fishery in Peru 小章鱼的种群结构和连通性：一种加强秘鲁底栖渔业管理的补充方法

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.rsma.2026.104760

Clara Ortiz-Alvarez , Eliana Alfaro-Cordova , Rosa María Cañedo-Apolaya , Mariela Pajuelo , Jeffrey C. Mangel , Joanna Alfaro-Shigueto , Oscar Garcia , Ximena Velez Zuazo

Sustainable fisheries require key information about species populations for sound management. The Peruvian octopus (Octopus mimus) is a species of economic importance to coastal communities, but few studies have investigated its genetic population structure and diversity along their distribution range in Peru. We examined the genetic population structure of O. mimus by assessing the genetic variability in COI and COIII genes in eight fishing locations distributed across three distinct biogeographic provinces. We found significant genetic population structure across the Peruvian coast and offshore islands, with two distinct clusters: one grouping individuals from locations within the Panamic and Transition Zone provinces and another including individuals from locations within the Peruvian province. This pattern was supported by both genetic markers. The observed genetic structure among O. mimus within Peruvian waters suggest the need to revise current management regulations. The observed differences may reflect the impact and variability of oceanographic conditions at different temporal scales and life history characteristics. Further studies should expand sampling to include additional localities along the distribution range of O. mimus to improve our understanding of this species’ connectivity, define stock boundaries and inform effective fisheries management strategies.

可持续渔业需要有关物种种群的关键信息，以便进行健全的管理。秘鲁章鱼（octopus mimus）是一种对沿海社区具有重要经济意义的物种，但很少有研究调查其在秘鲁分布范围内的遗传种群结构和多样性。通过对分布在3个不同生物地理省的8个渔点的COI和COIII基因的遗传变异性进行评估，研究了O. mimus的遗传群体结构。我们在秘鲁海岸和近海岛屿上发现了显著的遗传种群结构，有两个不同的集群：一个群体来自Panamic和过渡区省的位置，另一个包括来自秘鲁省的位置的个体。这一模式得到了两种遗传标记的支持。在秘鲁水域观察到的小水蛭的遗传结构表明有必要修订现行的管理条例。观测到的差异可能反映了不同时间尺度和生活史特征下海洋条件的影响和变率。进一步的研究应扩大采样范围，包括沿O. mimus分布范围的其他地点，以提高我们对该物种连通性的理解，确定种群边界，并为有效的渔业管理策略提供信息。

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引用次数: 0

Microplastic pollution and polymer risk assessment in the intertidal sediments of the southwest coast of India 印度西南海岸潮间带沉积物中微塑料污染及聚合物风险评估

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-08 DOI: 10.1016/j.rsma.2026.104755

Arya Dennison Bindulekha , Salom Gnana Thanga Vincent , Amrutha Vellore Mohankumar , Raja Sudhakaran , Jan Schwarzbauer

Microplastics (MPs) are emerging contaminants in coastal environments, potentially harming coastal communities. This study investigates the spatial and temporal distribution of microplastics in the intertidal zones of the southwest coast of India, specifically along the Thiruvananthapuram coastline. The study area spans approximately 60 km and is characterised by high population density, tourism, and fishing activities. A total of 24 sediment samples were collected from low, mid, and high tide zones during the wet (August 2019) and dry (March 2020) periods. Microplastic abundance showed significant spatial and seasonal variability, with 3520 items kg⁻¹ recorded during the wet period and 6590 items kg⁻¹ in the dry period. The predominant shapes identified were fibers, fragments, and films, with blue fibers being the most dominant. Polyethylene (PE) was the predominant polymer, followed by methylcellulose and styrene. Based on the Polymer Hazard Index (PHI), all sampling locations were fell into hazard levels III and V. During the wet period, most stations exhibited moderate risk, except station 2 (Pulluvila), which showed high risk. During the dry period, risk levels increased at most stations, while station 2 shifted to the moderate risk category. Despite their relatively low abundance, high-risk polymers such as polyacrylonitrile (PAN) and vinyl chloride (VC) significantly contributed to the overall hazard score. High tide zones exhibited greater MP abundance, reflecting the hydrodynamic conditions of the intertidal ecosystem. Tourist hotspots such as station 3 (Kovalam) and station 1 (Poovar) consistently showed elevated MP concentrations, indicating a direct link to anthropogenic activities, including tourism and waste disposal. These findings highlight the growing threat of microplastic pollution and emphasize the need for targeted mitigation and management strategies in coastal regions.

微塑料（MPs）是沿海环境中的新污染物，可能对沿海社区造成危害。本研究调查了微塑料在印度西南海岸潮间带的时空分布，特别是沿着蒂鲁凡南塔普兰海岸线。研究区面积约60 公里，以人口密度高、旅游和渔业活动为特征。在丰水期（2019年8月）和枯水期（2020年3月），从低潮区、中潮区和高潮区共采集了24份沉积物样本。微塑料丰度表现出显著的空间和季节变化，丰水期为3520项kg−1，枯水期为6590项kg−1。鉴定出的主要形状是纤维、碎片和薄膜，其中蓝色纤维占主导地位。聚乙烯（PE）是主要的聚合物，其次是甲基纤维素和苯乙烯。在丰水期，除2号站（Pulluvila）为高危站外，其余监测点均为中度风险。在干旱期，大多数站点的风险等级增加，而2号站点转移到中等风险类别。尽管它们的丰度相对较低，但聚丙烯腈（PAN）和氯乙烯（VC）等高风险聚合物对总体危害评分有显著贡献。高潮带MP丰度较高，反映了潮间带生态系统的水动力条件。3号站（Kovalam）和1号站（Poovar）等旅游热点持续显示MP浓度升高，表明与人为活动（包括旅游和废物处理）有直接联系。这些发现突出了微塑料污染日益严重的威胁，并强调需要在沿海地区制定有针对性的缓解和管理战略。

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引用次数: 0

A comparative study of microplastic contamination and ecological risk in beach and bottom sediments along the southern Black Sea coast 黑海南部海岸海滩和底部沉积物中微塑料污染与生态风险的比较研究

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-01 Epub Date: 2026-01-09 DOI: 10.1016/j.rsma.2026.104766

Yahya Terzi , Ahmet Raif Eryaşar , Nisan İşseven , İlhan Yandı , Ahmet Şahin , Rafet Çağrı Öztürk , Sedat Gündoğdu , Kenan Gedik

Microplastics (MPs) are now recognized as widespread pollutants in marine ecosystems, with semi-enclosed seas such as the Black Sea particularly vulnerable due to restricted water exchange and extensive land-based inputs. This study presents the first comparative assessment of MP contamination and ecological risk between beach and bottom sediments along the entire Black Sea coast of Türkiye, which comprises the basin’s longest national shoreline. A survey was conducted at 64 sites (38 beaches and 26 bottom-sediment sites). Mean concentrations were broadly comparable across matrices, averaging 140.39 ± 10.38 MP/kg in beach sediments and 106.19 ± 8.74 MP/kg in bottom sediments, though site-specific hotspots exceeded 200 MP/kg for both matrices. Fibers were the dominant morphology in both matrices, with a significantly higher proportion on beaches (74.1 %) than in bottom sediments (53.5 %), while fragments and films were relatively more abundant in bottom sediments. Blue and black particles were common in both environments. Polymer analysis revealed a strong dominance of polyethylene terephthalate (PET) in beach sediments (59.1 %). In contrast, seabed sediments displayed greater heterogeneity, with substantial polymer types of polyethylene (PE), polypropylene (PP), polyamide (PA), and polyacrylonitrile (PAN). Multivariate analyses confirmed statistically significant compositional differences between matrices, with PET identified as the primary driver of dissimilarity. The Polymer Hazard Index (PHI) indicated severe ecological risks, with over 70 % of sites in both matrices classified in the highest hazard category (Class V), underscoring the persistence of hazardous polymers and their potential bioavailability.

微塑料（MPs）现在被认为是海洋生态系统中广泛存在的污染物，黑海等半封闭海域由于有限的水交换和广泛的陆地输入而特别脆弱。这项研究首次对t rkiye整个黑海海岸的海滩和底部沉积物之间的MP污染和生态风险进行了比较评估，该海岸包括该盆地最长的国家海岸线。在64个地点（38个泳滩和26个底部沉积物地点）进行了调查。不同基质的平均浓度具有广泛的可比性，海滩沉积物的平均浓度为140.39 ± 10.38 MP/kg，海底沉积物的平均浓度为106.19 ± 8.74 MP/kg，尽管两种基质的特定地点热点均超过200 MP/kg。纤维是两种基质的主要形态，海滩上纤维的比例（74.1 %）显著高于底层沉积物（53.5 %），而碎屑和薄膜在底层沉积物中相对更丰富。蓝色和黑色颗粒在两种环境中都很常见。聚对苯二甲酸乙二醇酯（PET）在海滩沉积物中具有很强的优势（59.1% %）。相比之下，海底沉积物表现出更大的异质性，聚合物类型主要为聚乙烯（PE）、聚丙烯（PP）、聚酰胺（PA）和聚丙烯腈（PAN）。多变量分析证实了矩阵之间具有统计学意义的组成差异，PET被确定为差异的主要驱动因素。聚合物危害指数（PHI）表明存在严重的生态风险，两种基质中超过70% %的场地被列为最高危害类别（V类），强调了有害聚合物的持久性及其潜在的生物利用度。

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引用次数: 0