Regional Studies in Marine Science最新文献_第6页

Spatio-temporal dynamics for dolphinfish (Coryphaena hippurus) in the waters around Taiwan: Implications for stock assessment and fisheries management 台湾周边海域海豚（Coryphaena hippurus）的时空动态：种群评估与渔业管理的意义

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: 2026-02-09 DOI: 10.1016/j.rsma.2026.104832

Wen-Qi Xu , Sheng-Ping Wang , Chih-Yu Lin , Wei-Chuan Chiang , Toshihide Kitakado

Understanding the spatio-temporal dynamics of dolphinfish (Coryphaena hippurus) is essential for effective stock assessment and fisheries management. Owing to its migratory nature, rapid growth, and short lifespan, the species requires management approaches that account for spatial and temporal variability. In this study, two spatio-temporal modelling frameworks, VAST and sdmTMB, were applied to longline fishery logbook data collected in the waters around Taiwan from 2011 to 2023. Standardised indices of relative abundance were estimated using an area-weighted approach that accounted for both fished and unfished regions. Cluster analysis was conducted to classify fishing strategies based on species composition, revealing a dominant dolphinfish-targeted cluster concentrated in the eastern offshore region. Both spatio-temporal models detected consistent seasonal patterns, with peak abundance in the second quarter and a decline in the third, aligning with known migratory behaviour and oceanographic influences. Spatial hotspots were identified primarily in the northeastern waters influenced by the Kuroshio Current. While general agreement was observed between the models, sdmTMB produced higher spatial contrast and slightly greater abundance estimates in the early years. Differences in model structure, spatial resolution, and data coverage were found to influence predictive outcomes. Limitations regarding logbook data quality, spatial bias, and the absence of environmental covariates were acknowledged. Nevertheless, the results demonstrate the utility of spatio-temporal modelling in deriving robust abundance indices and identifying biologically and operationally significant fishing grounds that represent key habitats and high-effort zones for dolphinfish fisheries in the northwestern Pacific. These findings provide a strong basis for integrating spatial dynamics into stock assessments and support the development of adaptive, spatially explicit management strategies in the western Pacific.

了解海豚（Coryphaena hippurus）的时空动态对有效的种群评估和渔业管理至关重要。由于其迁移性质，生长迅速，寿命短，该物种需要考虑到空间和时间变化的管理方法。本研究采用VAST和sdmTMB两种时空模型框架，对2011 - 2023年台湾周边海域延绳钓渔业日志数据进行分析。标准化的相对丰度指数是用面积加权方法估计的，该方法同时考虑了捕捞和未捕捞区域。通过聚类分析，根据物种组成对捕捞策略进行分类，发现以海豚为目标的优势聚类集中在东部近海区域。两个时空模型都发现了一致的季节模式，第二季度丰度达到峰值，第三季度下降，这与已知的迁徙行为和海洋学影响相一致。空间热点主要分布在受黑潮影响的东北海域。虽然在模型之间观察到大致一致，但sdmTMB在早期产生了更高的空间对比度和略高的丰度估计。模型结构、空间分辨率和数据覆盖的差异会影响预测结果。承认日志数据质量、空间偏差和环境协变量缺失方面的局限性。尽管如此，研究结果证明了时空模型在获得强大的丰度指数和识别生物和操作上重要的渔场方面的实用性，这些渔场代表了西北太平洋海豚渔业的主要栖息地和高努力区。这些发现为将空间动态纳入种群评估提供了坚实的基础，并支持在西太平洋制定适应性强、空间明确的管理战略。

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引用次数: 0

Ecological risk assessment and trace metal distribution in surface water and sediments of the Bay of Bengal, India 印度孟加拉湾地表水和沉积物中痕量金属的生态风险评价与分布

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: 2026-01-19 DOI: 10.1016/j.rsma.2026.104789

Shanmugasundharam Arumugam , Sivakumar Karthikeyan , Ramachandran Annathurai , Saubhagya Ranjan Mahapatra

The current study assesses the spatial variability of physicochemical parameters, nutrients, and the distribution of trace metals in surface water and benthic sediments along the offshore Cuddalore region of the Bay of Bengal, India, and evaluates the associated ecological risk. Twenty-five surface water and sediment samples were collected between Cuddalore Harbour and Port Nova, an area impacted by industrial and residential effluents discharged via the Uppanar and Gadilam Rivers. Water analysis revealed a cation abundance order of Na > K > Mg > Ca, with nutrient concentrations ranging from 0.45 to 4.30 mg/l for nitrate and between 0.81 and 2.65 mg/l for phosphate, suggesting localized nutrient enrichment. Ecological risk indices applied to sediments indicated significant contamination: The Contamination Factor (CF) and Enrichment Factor (EF) for Cadmium (Cd) were consistently extreme (EF_mean ̴ 65), classifying the sediments as very severely contaminated and underscoring a non-crustal, anthropogenic source. Nickel (Ni) concentrations in the water column were found to be 4–6 times higher than established regional averages for the Bay of Bengal coast, also pointing to specific anthropogenic input. Principal Component Analysis (PCA) confirmed source differentiation: PC1 ( ̴ 34.25 % variance) showed high positive loadings for Fe, Mn, Cr, Cu, Ni, Pb, and Zn indicating a common lithogenic/anthropogenic source strongly controlled by fine-grained sediment texture. Significant positive correlations were observed between key pollutants (Co-Pb >0.80; Ni-Cd = 0.70), further supporting a common industrial origin. The systematic assessment concludes that anthropogenic activities are the main driver of increased trace metal content, posing a significant ecological threat to the coastal ecosystem.

本研究评估了印度孟加拉湾Cuddalore近海地区地表水和底栖沉积物中理化参数、营养物质和微量金属分布的空间变异性，并评估了相关的生态风险。在库达洛尔港和诺瓦港之间收集了25个地表水和沉积物样本，该地区受到乌帕纳尔河和加迪拉姆河排放的工业和居民污水的影响。水分析显示Na >； K >； Mg >； Ca的阳离子丰度顺序，硝酸盐的营养浓度在0.45 ~ 4.30 Mg /l之间，磷酸盐的营养浓度在0.81 ~ 2.65 Mg /l之间，表明局部营养富集。应用于沉积物的生态风险指数表明了严重的污染：镉（Cd）的污染因子（CF）和富集因子（EF）一直是极端的（ef均值为65），将沉积物分类为非常严重污染，并强调了非地壳的人为来源。发现水柱中的镍（Ni）浓度比孟加拉湾沿岸已确定的区域平均值高4-6倍 ，也指向特定的人为输入。主成分分析（PCA）证实了源分化：PC1（34.25 %方差）显示Fe， Mn, Cr, Cu, Ni， Pb和Zn的高正负荷，表明一个共同的岩石/人为源，受细粒沉积物质地的强烈控制。在主要污染物（Co-Pb = 0.80; Ni-Cd = 0.70）之间观察到显著的正相关，进一步支持共同的工业来源。系统评价认为，人类活动是导致沿海微量金属含量增加的主要原因，对沿海生态系统构成了严重的生态威胁。

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引用次数: 0

Source characterisation of the trace metal composition in coastal sediments from Andaman and Nicobar Islands 安达曼和尼科巴群岛海岸沉积物中微量金属成分的来源特征

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.2026.104862

V. Sachithanandam , Kiran Kumar Reddy , S. Sai Elangovan , P.M. Mohan , B.S.K. Kumar , G. Deviram , N.V. Vinithkumar

The Andaman and Nicobar Islands, located at the Indian and Pacific lithospheric plates intersection, host diverse ecosystems such as coral reefs, mangroves, and seagrass beds. In this study an attempt was made to provide baseline data for the selected trace metal concentrations and possible sources in surface sediment samples collected from 35 sites of South Andaman Island. Based on the geochemical classification, the results of trace metal concentrations revealed higher lithophile trace metal concentrations than chalcophile and siderophile metals, indicating a geogenic source. Further, the calculated indices like Enrichment Factor, and Geo-accumulation Index confirmed minimal anthropogenic impact. On the other hand, Pollution Load Index has showed moderate As and Pb enrichment only in urbanized areas like Guptapara and Junglighat. Remote sites such as Jolly Buoy Island showed minimal contamination, which emphasizing the interplay of natural and human influences on sediment quality and the need for detailed and long-term environmental monitoring and management.

安达曼和尼科巴群岛位于印度和太平洋岩石圈板块交汇处，拥有珊瑚礁、红树林和海草床等多种生态系统。在这项研究中，试图为从南安达曼岛35个地点收集的地表沉积物样本中选定的微量金属浓度和可能的来源提供基线数据。微量金属地球化学分类结果显示，亲石型微量金属含量高于亲铜型和亲铁型金属，表明其成因。此外，计算的富集系数和地质聚集指数证实了人为影响最小。另一方面，污染负荷指数仅在古普塔帕拉和Junglighat等城市化地区显示出中度的As和Pb富集。乔利浮标岛等偏远地点的污染程度最低，这强调了自然和人类对沉积物质量的相互影响，以及需要进行详细和长期的环境监测和管理。

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引用次数: 0

First data on the family Dulichiidae (Amphipoda: Senticaudata) from communities of the Piip submarine volcano, the Bering Sea, with the description of a new species of Dulichiopsis 从白令海Piip海底火山群落中首次发现了杜立苣苔科（片足纲：圆尾苣苔科），并描述了杜立苣苔的一个新种

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: 2026-02-23 DOI: 10.1016/j.rsma.2026.104877

Pavel A. Kireev, Olga A. Golovan

During ROV surveys of the communities of the Piip submarine volcano in the Bering Sea, amphipods of the family Dulichiidae were observed in high abundance (up to ∼ 120 masts per 1 m²). Specimens sampled at a depth of 407 m on the northern summit were found to represent a new species, Dulichiopsis ogo sp. nov., which is described here. Dulichiopsis ogo sp. nov. most closely resembles D. barnardi Laubitz, 1977 known from the bathyal zone of the northeastern Pacific by having more developed eyes than in other congeners, and an unusually long urosomite 1 (which is longer than pleonites 1–3 combined). The new species can be distinguished from all known congeners by the presence of a dorsolateral suture between pereonites 6 and 7 and three apical spine teeth on the maxilliped inner plate. The taxonomic composition of the genus Dulichiopsis is discussed

在对白令海Piip海底火山群落的ROV调查中，观察到高丰度（每1 m²高达120根）的双足类动物。在北峰407 米深处的标本被发现代表了一个新种，Dulichiopsis ogo sp. nov.，这里有描述。Dulichiopsis ogo sp11 .与d.b arnardi Laubitz（1977）最为相似，因为它的眼睛比其他同类更发达，并且有一个异常长的尿体1（比pleonite 1 - 3加起来还要长）。这个新种可以从所有已知的同系物中区分出来，因为在6号和7号peronites之间存在背外侧缝合线，并且在上唇部的内板上有三个尖棘牙齿。讨论了杜丽菊属的分类组成

引用次数: 0

Sedimentary phosphorus deposits in a southern Caribbean gulf during the last millennium 上个千年加勒比海南部海湾的沉积磷沉积物

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: 2026-02-16 DOI: 10.1016/j.rsma.2026.104857

Alex Rúa , Kelis Romaña , Paula Quiceno , Juan P. Serna , Juan Fernando Gómez , Elisabeth Pohlon , Heazel Grajales

This study reconstructs the evolution of sedimentary phosphorus (P) in the Gulf of Urabá using three sediment cores spanning the last millennium. Total (TP), inorganic (IP), and organic phosphorus (OP) were quantified and evaluated in relation to sediment granulometry, estuarine hydrography, and climate periods viz., Medieval Warm Period (MWP), Little Ice Age (LIA), and Current Warm Period (CWP). TP and IP were determined by spectrophotometry after calcination and HCl extraction. OP was calculated as the difference between TP and IP. P deposition was seemingly controlled by fluvial transport and sedimentation rates, with minor contribution from in situ biological assimilation. OP dominated at all sites (67–90 %), particularly in muddy facies associated with lower-energy depositional environments. Distinct TP and IP peaks during MWP–LIA and LIA–CWP transitions are consistent with episodic increases in rainfall intensity and sediment transport. Principal component analysis (PCA) indicated an association between granulometry, P speciation, and fluvial discharge modulated by climate variability. This study provides the first high-resolution sedimentary P record in the gulf, showing that long-term P accumulation is dominated by physical transport and modulated by climate variability and land-use change.

本研究利用三个沉积物岩心重建了过去一千年来乌拉伯湾沉积磷(P)的演化。对总磷（TP）、无机磷（IP）和有机磷（OP）进行了定量分析，并与沉积物粒度、河口水文和气候时期（中世纪暖期（MWP）、小冰期（LIA）和当前暖期（CWP））进行了关联。经煅烧、盐酸萃取，用分光光度法测定TP和IP。OP计算为TP和IP的差值。磷的沉积似乎受河流运输和沉积速率的控制，而原位生物同化的作用较小。OP在所有地点都占主导地位（67-90 %），特别是与低能量沉积环境相关的泥质相。在MWP-LIA和LIA-CWP转变过程中，TP和IP的显著峰值与降雨强度和输沙量的幕式增加相一致。主成分分析（PCA）表明，粒度、磷形态与气候变率调节的河流流量之间存在关联。该研究首次提供了高分辨率的沉积P记录，表明长期P积累以物理搬运为主，并受气候变率和土地利用变化的调节。

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引用次数: 0

Differential presence of microplastics in the gastrointestinal tract of tropical fish in relation to trophic levels 热带鱼胃肠道中微塑料的差异存在与营养水平的关系

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: 2026-02-05 DOI: 10.1016/j.rsma.2026.104836

Merle M. Borges-Ramírez, Rosa E. Martínez-Cerda, Carlos E. Paz-Ríos, Edgar F. Mendoza-Franco, Atahualpa Sosa-López, Jaime Rendón-von Osten

Tropical marine fish with different trophic levels were studied to determine the quantity and distribution of microplastics in their intestinal tracts. Eight hundred eighty-eight individual fish representing eleven species used for human consumption in Campeche (southern Gulf of Mexico) were examined. A total of 745 microplastics were found with an average of 0.83 ± 1.83 MPs∙individual⁻¹. Among the microplastics detected, fragments were the most prevalent (54.89 %), and black microplastics were most frequently found in 44.83 % of the fish. The most abundant polymers identified were polyethylene vinyl acetate (PEVA), polybutadiene+naphthenic oil (PB+NO), and polyethylene/propylene/diene (EPDM). Furthermore, a greater abundance of smaller microplastics (0.25–0.5 mm) was found in organisms at low (TL 2.5) and medium (TL 2.9) trophic levels, unlike organisms with high TL. Our results show that microplastics are widespread in the food web of the tropical coastal fish assemblage analyzed.

研究了不同营养水平的热带海鱼，以确定其肠道中微塑料的数量和分布。在坎佩切（南墨西哥湾），研究了11种供人类食用的888条鱼。共发现745个微塑料，平均为0.83 ± 1.83 MPs∙个体−1。在检测到的微塑料中，碎片最常见（54.89 %），黑色微塑料最常见（44.83 %）。最丰富的聚合物是聚乙烯醋酸乙烯酯（PEVA）、聚丁二烯+环烷油（PB+NO）和聚乙烯/丙烯/二烯（EPDM）。此外，在低营养水平（TL 2.5）和中营养水平（TL 2.9）的生物体中发现了更丰富的小微塑料（0.25-0.5 mm），与高营养水平的生物体不同。我们的研究结果表明，微塑料在所分析的热带沿海鱼类群落的食物网中广泛存在。

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引用次数: 0

Harnessing cloud-based SAR earth observation and GNOME numerical simulation for modelling the MSC ELSA III oil spill trajectory: Insight from the Kochi coast in south-eastern Arabian sea 利用基于云的SAR地球观测和GNOME数值模拟模拟MSC ELSA III溢油轨迹：来自阿拉伯海东南部Kochi海岸的洞察

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: 2026-02-12 DOI: 10.1016/j.rsma.2026.104844

Binay Bhattacharya , SK Ariful Hossain , Moumita Ghosh , Swapnil Das

A Liberian container vessel, MSC ELSA III, had capsized 38 nautical miles off Kochi on May 25, 2025, releasing oil and cargo in the southeastern Arabian Sea. This study investigated the trajectory and eventual fate of this oil spill, focusing on the key driving forces. The spill was simulated using GNOME numerical model through a series of control and sensitivity experiments focusing on the diffusion coefficient and the influence of wind and current movers. A control experiment, validated with both winds and currents from Sentinel-1 imagery, showed that a diffusion coefficient of 1000 m²/s accurately replicated the actual slick in terms of lateral spread. The simulated spill at 00:00 UTC on May 28 was positioned near the observed spill at 00:41 UTC on the same date. The combined impact of winds and currents predominantly steered the oil spill in a south-eastward direction while slowly approaching the shore, highlighting their critical role in modulating the spill’s transport and dispersion pathways. Moreover, the sensitivity experiment demonstrated that winds alone transported the spill towards the shore, whereas currents alone induced a south-eastward drift of the spill that kept the oil offshore. This study further indicated that evaporation and beaching were the predominant processes, with evaporation peaking at 48 % within the first 4 h and beaching accounting for 51 % of the spill after 72 h. Therefore, this study provided valuable insights into spill fate and behaviour, supported timely response in mitigation efforts to protect ecologically sensitive coastal environments, and advanced multiple UN SDGs.

2025年5月25日，一艘名为MSC ELSA III的利比里亚集装箱船在距科知38海里处倾覆，在阿拉伯海东南部海域泄漏石油和货物。这项研究调查了这次石油泄漏的轨迹和最终命运，重点是关键的驱动因素。采用GNOME数值模型对泄漏进行了模拟，通过一系列的控制和灵敏度实验，重点研究了扩散系数和风、流驱动因素的影响。通过对Sentinel-1图像的风和洋流进行控制实验，结果表明，1000 m²/s的扩散系数准确地复制了实际浮油的横向扩散。5月28日00:00 UTC的模拟泄漏位于同一天00:41 UTC的观测泄漏附近。在缓慢靠近海岸的同时，风和海流的共同影响主要使石油向东南方向泄漏，突出了它们在调节泄漏的运输和扩散路径方面的关键作用。此外，敏感性实验表明，仅风就能将泄漏物吹向海岸，而仅海流就能使泄漏物向东南方向漂移，使石油保持在近海。该研究进一步表明，蒸发和搁浅是主要的过程，在前4 h内蒸发达到峰值48 %，72 h后搁浅占泄漏量的51 %。因此，该研究提供了有关泄漏命运和行为的宝贵见解，支持及时响应减灾工作，以保护生态敏感的沿海环境，并推进多项联合国可持续发展目标。

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引用次数: 0

Identifying potential investable ports along the Maritime Silk Road from the perspective of supply-demand balance 从供需平衡的角度寻找海上丝绸之路沿线潜在的可投资港口

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: 2026-02-07 DOI: 10.1016/j.rsma.2026.104845

Yanbin Yang , Ling Sun , Zhong Ning , Wenjing Zhang , Kaiyuan Li

With the advancement of the 21st Century Maritime Silk Road (MSR) initiative, Chinese enterprises have actively participated in the construction and operation of ports along the MSR, significantly enhancing maritime connectivity. As the MSR enters a new phase of high-quality development, overseas port investment faces higher standards. Achieving supply-demand balance of port is critical for sustainable development, as it contributes to improved operational efficiency, resource optimization and financial stability. This study focuses on container ports along the MSR and proposes quantitative methods to evaluate port demand and supply. Port demand is measured by container throughput, while supply is inferred from operational performance indicators. A systematic method to evaluate the supply-demand balance status of global ports is then conducted and 581 global ports are classified into five categories. Results show that 65.58 % of these ports are in a relatively balanced status, while 14.29 % face supply shortages. Focusing on 366 ports along the MSR, the study identifies 19 potential investable ports with significant supply shortages. Additionally, 18 ports are selected as potential alternatives for these 19 ports based on geographic proximity, throughput comparability and supply adequacy. The findings provide theoretical support for optimizing port resource allocation and improving network resilience, offering a data-driven basis for Chinese enterprises to make informed overseas investment decisions.

随着“21世纪海上丝绸之路”倡议的推进，中国企业积极参与沿线港口的建设和运营，显著提升了海上互联互通水平。随着丝路经济带进入高质量发展新阶段，海外港口投资面临更高标准。实现港口供需平衡，有利于提高运营效率、优化资源、稳定金融，是实现港口可持续发展的关键。本研究以海上丝绸之路沿线的集装箱港口为研究对象，提出港口需求与供给的定量评估方法。港口需求由集装箱吞吐量衡量，而供应则由运营绩效指标推断。采用系统的方法对全球港口的供需平衡状况进行了评价，并将全球581个港口分为五类。结果表明，65.58 %的港口处于相对平衡状态，14.29 %的港口处于供应短缺状态。该研究以MSR沿线的366个港口为重点，确定了19个供应严重短缺的潜在可投资港口。此外，根据地理邻近性、吞吐量可比性和供应充足性，选择了18个港口作为这19个港口的潜在替代方案。研究结果为优化港口资源配置和提高网络弹性提供了理论支持，为中国企业海外投资决策提供了数据驱动依据。

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引用次数: 0

New insights into the distribution of methane from sediment and surface waters in urban tropical bay (Jakarta-Indonesia) 城市热带海湾沉积物和地表水甲烷分布的新认识（印度尼西亚雅加达）

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.2026.104799

Irfan Kampono , Fadjar Hidayat , Nining Sari Ningsih , Yaya Ihya Ulumuddin , Hanif Budi Prayitno , Aditya R. Kartadikaria

Methane (

CH ₄

), the second most impactful greenhouse gas, is often underrepresented in coastal environmental assessments. This study examined

CH ₄

concentrations in surface water and sediment porewater across Jakarta Bay, a highly urbanized estuary receiving wastewater from 13 rivers. Surveys conducted in July, August, and October 2023 identified two major

CH ₄

hotspots: the eastern region near Marunda (surface: 2.61 μmol L⁻¹; porewater: 27.43 μmol L⁻¹) and the western region near Muara Angke–Pantai Indah Kapuk, a newly developed urban coastal zone (1.41 and 13.31 μmol L⁻¹, respectively). In the eastern bay, elevated

CH ₄

levels were strongly associated with low dissolved oxygen (

DO

) and high phosphate (

PO ₄ - P

), indicating eutrophication-driven methanogenesis under hypoxic conditions. In contrast, the western bay exhibited a different dynamic:

CH ₄

concentrations were higher closer to the coastline and negatively correlated with

DO

, despite surface waters being well-oxygenated. This paradox suggests vertical decoupling between surface and benthic conditions, where methane likely originates from deeper anoxic sediments, potentially mobilized by disturbances such as dredging, land reclamation, and the historical loss of mangroves. Elevated dissolved inorganic carbon (DIC) and low sediment

pH

further support the presence of intense microbial respiration and organic matter degradation. Seasonally,

CH ₄

fluxes in the east declined from July to October, while fluxes in the west increased, highlighting contrasting temporal controls. These findings reveal dual

CH ₄

-generating mechanisms in Jakarta Bay, eutrophication in the east and anthropogenic sediment disturbance in the west, and underscore the importance of integrating spatial and seasonal

CH ₄

dynamics into coastal monitoring and mitigation strategies.

甲烷（CH₄）是影响第二大的温室气体，但在沿海环境评估中往往代表性不足。本研究检测了雅加达湾地表水和沉积物孔隙水中的CH₄浓度，雅加达湾是一个高度城市化的河口，接收来自13条河流的废水。在2023年7月、8月和10月进行的调查确定了两个主要的氯化钾热点：靠近玛伦达的东部地区（表面：2.61 μmol L⁻¹；孔水：27.43 μmol L⁻¹）和靠近Muara Angke-Pantai Indah Kapuk的西部地区，一个新开发的城市沿海地带（分别为1.41和13.31 μmol L⁻¹）。在东湾，CH₄水平升高与低溶解氧（DO）和高磷酸盐（PO₄−P）密切相关，表明在缺氧条件下富营养化驱动甲烷生成。相比之下，西部海湾表现出不同的动态：尽管地表水氧合良好，但靠近海岸线的CH₄浓度较高，与DO呈负相关。这一悖论表明了地表和底栖环境之间的垂直脱钩，甲烷可能来自更深的缺氧沉积物，可能受到疏浚、土地复垦和红树林历史损失等干扰。升高的溶解无机碳（DIC）和低沉积物pH值进一步支持了强烈的微生物呼吸和有机物降解的存在。从季节上看，7 - 10月，东部的氯化物通量下降，西部的氯化物通量增加，突出了时间控制的差异。这些发现揭示了雅加达湾的双重氯化铵生成机制，东部的富营养化和西部的人为泥沙扰动，并强调了将空间和季节氯化铵动态纳入沿海监测和缓解策略的重要性。

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引用次数: 0

Impact of microplastics on the attachment strength of blue mussels, Mytilus species in different substrates 微塑料对蓝贻贝、贻贝在不同基质上附着强度的影响

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: 2026-01-27 DOI: 10.1016/j.rsma.2026.104815

Darolin Vinisha, Ketan Christi, Surendra Prasad

The study investigated the attachment strength of blue mussels, Mytilus sp., in two different substrates in Laucala Bay, Fiji, to examine the impact of microplastics on their byssal threads. Quality of the threads examined was carried out using different approaches. There was a significant difference, p

\leq

0.01 in the mean of byssus thickness between the mussels collected from rocks (46.52 ± 14.81 µm) and sediments (14.08 ± 6.37 µm). Mytilus sp. present in rocky surfaces had byssal threads 53.53 % thicker than Mytilus sp. found in the sediments. Similar results observed when attachment strength for Mytilus sp. were measured in two substrates. Statistically a significant difference p

\leq

0.01 was seen in the tenacity for mussels collected from rocks (30.56 ± 10.77 nm) and sediments (5.49 ± 4.10 nm). Mytilus sp. present in rocky surfaces had their tensile strength 69.54 % stronger than Mytilus sp. found in the sediments. The seventeen ingested plastic pieces were distinguished from the sixty-six plastic type pieces in the foot of Mytilus sp. All polymers were present in form of fiber where 94.1 % of the polymer identified was found in the foot of Mytilus sp. from sediments, while 5.8 % from the samples collected from the rocks, indicating that concentrations of microplastics (MPs) were higher in the sediments than in water columns. Owning to the persistent nature of MPs and the findings of this study, continued accumulation of MPs may weaken the attachment capacity of mussels over time, potentially affecting their survival and stability within intertidal habitats.

该研究调查了蓝贻贝（Mytilus sp.）在斐济劳卡拉湾（Laucala Bay）两种不同基质上的附着强度，以检查微塑料对其粗线的影响。采用不同的方法检测螺纹的质量。岩石中采集的贻贝足厚度平均值（46.52±14.81µm）与沉积物中采集的贻贝足厚度平均值（14.08±6.37µm）差异有统计学意义（p≤0.01）。在岩石表面发现的贻贝螺比在沉积物中发现的贻贝螺粗53.53%。当在两种基质上测量Mytilus sp.的附着强度时，观察到类似的结果。岩石（30.56±10.77 nm）和沉积物（5.49±4.10 nm）贻贝的韧性差异有统计学意义（p≤0.01）。在岩石表面发现的贻贝的抗拉强度比沉积物中发现的贻贝的抗拉强度高69.54%。17个摄入的塑料碎片与Mytilus sp.脚部的66个塑料类型碎片区分开来。所有聚合物都以纤维的形式存在，其中94.1%的聚合物是在Mytilus sp.脚部的沉积物中发现的，而从岩石中收集的样品中发现的聚合物为5.8%，表明沉积物中的微塑料（MPs）浓度高于水柱。由于MPs的持久性和本研究的发现，随着时间的推移，MPs的持续积累可能会削弱贻贝的附着能力，潜在地影响它们在潮间带栖息地的生存和稳定。

{"title":"Impact of microplastics on the attachment strength of blue mussels, Mytilus species in different substrates","authors":"Darolin Vinisha, Ketan Christi, Surendra Prasad","doi":"10.1016/j.rsma.2026.104815","DOIUrl":"10.1016/j.rsma.2026.104815","url":null,"abstract":"<div><div>The study investigated the attachment strength of blue mussels, <em>Mytilus</em> sp<em>.</em>, in two different substrates in Laucala Bay, Fiji, to examine the impact of microplastics on their byssal threads. Quality of the threads examined was carried out using different approaches. There was a significant difference, p<span><math><mrow><mspace></mspace><mo>≤</mo></mrow></math></span>0.01 in the mean of byssus thickness between the mussels collected from rocks (46.52 ± 14.81 µm) and sediments (14.08 ± 6.37 µm). <em>Mytilus</em> sp<em>.</em> present in rocky surfaces had byssal threads 53.53 % thicker than <em>Mytilus</em> sp<em>.</em> found in the sediments. Similar results observed when attachment strength for <em>Mytilus</em> sp<em>.</em> were measured in two substrates. Statistically a significant difference p<span><math><mrow><mspace></mspace><mo>≤</mo></mrow></math></span>0.01 was seen in the tenacity for mussels collected from rocks (30.56 ± 10.77 nm) and sediments (5.49 ± 4.10 nm). <em>Mytilus</em> sp<em>.</em> present in rocky surfaces had their tensile strength 69.54 % stronger than <em>Mytilus</em> sp<em>.</em> found in the sediments. The seventeen ingested plastic pieces were distinguished from the sixty-six plastic type pieces in the foot of <em>Mytilus</em> sp<em>.</em> All polymers were present in form of fiber where 94.1 % of the polymer identified was found in the foot of <em>Mytilus</em> sp. from sediments, while 5.8 % from the samples collected from the rocks, indicating that concentrations of microplastics (MPs) were higher in the sediments than in water columns. Owning to the persistent nature of MPs and the findings of this study, continued accumulation of MPs may weaken the attachment capacity of mussels over time, potentially affecting their survival and stability within intertidal habitats.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"95 ","pages":"Article 104815"},"PeriodicalIF":2.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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