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

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 : 2026-02-06 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

Occurrence, seasonal dynamics, and environmental drivers of bisphenol A along the freshwater-marine continuum in Northern Vietnam 越南北部淡水-海洋连续体双酚A的发生、季节动态和环境驱动因素

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-05 DOI: 10.1016/j.rsma.2026.104838

Thi Thu Trang Nguyen , Duc Long Huynh , Xuan Thanh Thao Le , Thi Yen Pham , Van Manh Do

Bisphenol A (BPA) is one of the endocrine-disrupting compounds (EDCs) commonly detected in aquatic environments, particularly in estuarine and marine systems influenced by anthropogenic activities. This study evaluated the occurrence, seasonal distribution, and key environmental drivers of BPA along the freshwater-marine continuum in Northern Vietnam, encompassing freshwater, brackish, and marine waters. Water samples were collected at 46 locations in both the wet and dry seasons. The results showed that BPA concentrations were generally higher in brackish and marine waters than in freshwater, with elevated levels observed during the wet season, likely due to enhanced upstream transport toward coastal and marine areas. BPA concentrations in seawater exhibited significant correlations (p < 0.05), particularly during the wet season, with salinity and electrical conductivity (EC). In contrast, correlations with total suspended solids (TSS) and dissolved oxygen (DO) were mainly observed during the wet season. Ecological risk assessment based on the risk quotient (RQ) shows that RQ < 1 in all areas, indicating low to very low ecological risk levels. However, BPA tends to accumulate locally in urban and industrial areas, potentially posing ecological risks. The research results contribute to clarifying the seasonal distribution mechanism and provide scientific data for managing EDC pollution in freshwater-marine systems in Northern Vietnam.

双酚A （BPA）是水生环境中常见的内分泌干扰化合物（EDCs）之一，特别是在受人为活动影响的河口和海洋系统中。本研究评估了越南北部淡水-海洋连续体（包括淡水、咸淡水和海水）中BPA的发生、季节分布和主要环境驱动因素。在旱季和雨季，在46个地点采集了水样。结果表明，在咸淡水和海水中的BPA浓度普遍高于淡水，在雨季观察到的水平升高，可能是由于上游向沿海和海洋地区的运输增强。海水中BPA浓度与盐度和电导率（EC）呈显著相关（p <； 0.05），特别是在雨季。与总悬浮物（TSS）和溶解氧（DO）的相关性主要表现在雨季。基于风险商（RQ）的生态风险评价结果显示，各区域的RQ <； 为1，表示低至极低的生态风险水平。然而，双酚a往往在城市和工业地区积聚，可能造成生态风险。研究结果有助于阐明越南北部淡水-海洋系统中EDC污染的季节性分布机制，并为管理EDC污染提供科学数据。

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引用次数: 0

Personal protective equipment (PPE) pollution assessment after the COVID-19 pandemic along the coast of the Strait of Messina, Italy 意大利墨西拿海峡沿岸2019冠状病毒病大流行后个人防护装备污染评估

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-05 DOI: 10.1016/j.rsma.2026.104840

Shabab Hussain , Mariachiara Costanzo , Sergio Famulari , Claudio D’Iglio , Nunziacarla Spanò , Serena Savoca

As a result of the COVID-19 pandemic, plastic pollution has increased considerably worldwide due to the discharge of personal protective equipment (PPE) into aquatic environments. The aim of this study is to evaluate the pollution rate caused by PPE along the coasts of the Strait of Messina (Italy). From June 2022 to May 2023, nine sampling sites were inspected using transects to collect PPE, including facemasks, face shields and surgical gloves. A total of 143 PPE was found in an area of 14 545 km² of beach. Face masks were the most commonly found PPE (n = 92, 64.4 %) compared to gloves (n = 51, 35.6 %). The density of PPE was 1.08 × 10⁻² PPE m⁻². The results suggest lack of awareness, negligence in the waste management system, and poor implementation of policies on plastic pollution, with serious impacts on the health of coastal environments.

由于2019冠状病毒病大流行，由于个人防护装备（PPE）排放到水生环境中，全球塑料污染大幅增加。本研究的目的是评估PPE对意大利墨西拿海峡沿岸的污染率。从2022年6月至2023年5月，使用样带检查了9个采样点，收集了包括口罩、面罩和外科手套在内的个人防护装备。在14 545 平方公里的海滩区域共发现143个个人防护装备。口罩是最常见的PPE (n = 92,64.4 %)，手套（n = 51,35.6 %）。PPE密度为1.08 × 10−2 PPE m−2。结果表明，缺乏意识，废物管理系统的疏忽，以及塑料污染政策的执行不力，严重影响了沿海环境的健康。

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 : 2026-02-05 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

Nutritional regimes transcend hydrographic boundaries: Determinants of microbial diversity across frontal systems at fine scale 营养制度超越了水文边界：精细尺度下额叶系统微生物多样性的决定因素

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-05 DOI: 10.1016/j.rsma.2026.104839

Rajapakshalage Thashikala Nethmini , Qing He , Gonglingxia Jiang , Qinghua Hou , Qingxiang Chen , Xiaolei Li , Ke Dong , Lingling Xie , Nan Li

Ocean fronts represent dynamic physical boundaries with steep environmental gradients that promote ecological niche differentiation and influence microbial diversity. However, their contribution to governing microbial diversity and distribution at finer spatial scales remains unclear. In this study, we investigated the microbial diversity and seasonal distribution patterns across thermal, salinity, and chlorophyll-a ocean fronts within the semi-enclosed basin of Beibu gulf, China. Our findings reveal that ocean fronts did not function as ecological boundaries facilitating niche partitioning of microbial assemblages within Beibu gulf. Hierarchical clustering showed no spatial alignment between microbial community distribution and frontal zones, and both linear and non-linear regression analyses found no significant correlations between front intensities and microbial alpha diversity. Instead, nutrients consistently emerged as the primary determinant of microbial distribution, substantially exceeding the influence of water properties and ocean fronts, with nitrogen compounds and phosphate identified as key drivers of bacterial and fungal diversity patterns. Our findings indicate that nutrient-mediated biogeochemical processes, rather than physical oceanic fronts, predominantly regulate microbial community structure in marginal seas and highlights the significance of nutrient dynamics for microbial distribution mechanisms and diversity maintenance in fine-scale marine systems.

海洋锋是具有陡峭环境梯度的动态物理边界，促进生态位分化并影响微生物多样性。然而，它们在更精细的空间尺度上对控制微生物多样性和分布的贡献尚不清楚。研究了北部湾半封闭海盆内热锋、盐度锋和叶绿素-a海锋的微生物多样性及其季节分布规律。研究结果表明，海锋并没有作为北部湾微生物群落生态位划分的生态边界。分层聚类分析显示，锋面强度与微生物α多样性之间不存在空间一致性，线性和非线性回归分析均未发现锋面强度与微生物α多样性之间存在显著相关性。相反，营养物一直是微生物分布的主要决定因素，大大超过了水性质和海洋锋面的影响，氮化合物和磷酸盐被确定为细菌和真菌多样性模式的关键驱动因素。研究结果表明，营养物质介导的生物地球化学过程，而不是物理海洋锋面，主导着边缘海微生物群落结构，并强调了营养动态对精细尺度海洋系统中微生物分布机制和多样性维持的重要性。

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引用次数: 0

Upwelling as a nursery for fish larvae: Summer observations from the Taiwan Bank 上升流作为鱼苗的苗圃：台湾浅滩夏季观测

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-04 DOI: 10.1016/j.rsma.2026.104831

Yu-Hsuan Sun , Yi-Chen Wang , Ling-Hsuan Hsu , Pei-Jie Meng , Hung-Yen Hsieh

The present study investigated the impact of upwelling on the hydrographic conditions and fish larvae assemblages around the Taiwan Bank. In July 2023, a total of 2061 fish larvae were collected, representing 130 species from 61 families and 99 genera, identified through DNA barcoding. The dominant taxa included Bleekeria mitsukurii, Lactarius lactarius, Sillago ingenuua, Encrasicholina heteroloba, and Selaroides leptolepis. At central region of the bank, a low-temperature, high-salinity water mass extended toward the surface, delineating the principal upwelling zone. Within this region, elevated fluorescence and zooplankton abundance created favorable breeding conditions for fish larvae. Cluster analysis revealed two distinct summer assemblage groups: (i) stations in the northern non-upwelling area and the central upwelling zone, and (ii) stations in the southern bank. Assemblages in the southern group were compositionally distinct from those in both the northern and central regions, largely due to the presence of mesopelagic larvae transported northward by the South China Sea Surface Current. We propose that the upwelling waters act as a barrier, limiting further northward dispersal of these mesopelagic larvae into the upwelling zone and adjacent shallow habitats.

摘要本研究以台湾浅滩为研究对象，探讨了上升流对台湾浅滩周边水文环境及鱼类幼鱼群的影响。2023年7月，通过DNA条形码技术共采集到61科99属130种的鱼类幼鱼2061条。优势类群有：mitsukuria Bleekeria、Lactarius Lactarius、silago ingenuua、Encrasicholina heteroloba和Selaroides leptolepis。在滩中央地区，一个低温、高盐度的水团向地表延伸，圈定了主要的上升流带。在这个区域内，荧光的增强和浮游动物的丰度为鱼类幼虫创造了有利的繁殖条件。聚类分析结果显示，夏季降水分布明显分为北部非上升流区和中部上升流区和南岸2个站点。南部群的组合在组成上与北部和中部地区不同，这主要是由于南海表面流向北输送的中远洋幼虫的存在。我们认为，上升流起到了屏障的作用，限制了这些中上层幼虫进一步向北扩散到上升流区和邻近的浅层栖息地。

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引用次数: 0

The silent drift of PAHs in the East China Sea: Sources, ecological risks, and remediation 东海多环芳烃的无声漂移：来源、生态风险与治理

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-04 DOI: 10.1016/j.rsma.2026.104826

Liberty Chidewe , Rongrong Zhang , Lord Famiyeh , Kalim Ullah , Qunying Lu , Zeming Zhang , Xizhi Shi

This review synthesizes two decades (2004–2024) of research on polycyclic aromatic hydrocarbons (PAHs) in the East China Sea (ECS), focusing on their occurrence, sources, risks, and remediation. Using a PICO-guided systematic approach, we compiled data across seawater, sediments, biota, and food webs. PAH concentrations in seawater range from non-detectable to 816.9 ng/L, while sediments span 1.7–3047.1 ng/g, with ecological risk quotients generally indicating low to moderate risk (RQ ≤ 1). Biota exhibit PAH levels up to 3500 ng/g, revealing notable bio-accumulation, and benzo[a]pyrene Toxicity Equivalency Quotient (TEQ_BaP) values from 1960 to 2020 sediment cores (0.34–5.4 ng/g) remain far below the 600 ng/g toxicity threshold, suggesting limited carcinogenic pressure at the sediment level. Nevertheless, seafood-based excess cancer risk (ECR) values between 1.10E-7 and 5.08E-5, with some exceeding 1.0E-6, point to potential long-term human health concerns. Source apportionment indicates that oil spills, petroleum and coal combustion, steel production, and other industrial emissions are the dominant contributors, with spatial hotspots linked to high population density and GDP. The review also evaluates remediation options—including bio-remediation, adsorption, advanced oxidation processes, sediment capping, and photo-degradation—and discusses their feasibility under ECS-specific hydrodynamic and ecological conditions. Overall, the ECS currently exhibits low to moderate PAH pollution on both regional and global scales; however, strengthened monitoring, locally adapted risk assessment frameworks, and targeted remediation strategies remain essential.

本文综述了近20年来东海多环芳烃（PAHs）的分布、来源、风险和修复等方面的研究进展。利用pico引导的系统方法，我们收集了海水、沉积物、生物群和食物网的数据。海水中多环芳烃浓度范围为不可检测到~ 816.9 ng/L，沉积物中多环芳烃浓度范围为1.7 ~ 3047.1 ng/g，生态风险商数一般为中低风险（RQ≤1）。生物群的多环芳烃含量高达3500 ng/g，显示出显著的生物积累，1960年至2020年沉积物芯的苯并[a]芘毒性等效商（TEQBaP）值（0.34-5.4 ng/g）远低于600 ng/g的毒性阈值，表明沉积物水平的致癌压力有限。然而，基于海鲜的过量癌症风险（ECR）值在1.10E-7和5.08E-5之间，有些超过1.0E-6，表明潜在的长期人类健康问题。来源分析表明，石油泄漏、石油和煤炭燃烧、钢铁生产和其他工业排放是主要的排放源，其空间热点与高人口密度和高GDP有关。该综述还评估了修复方案，包括生物修复、吸附、高级氧化工艺、沉积物封盖和光降解，并讨论了它们在ecs特定的水动力和生态条件下的可行性。总体而言，东太平洋经济区目前在区域和全球范围内均表现出低至中度多环芳烃污染；然而，加强监测、适应当地的风险评估框架和有针对性的补救战略仍然至关重要。

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引用次数: 0

Coastal morphological changes and response to Typhoon Rai events in Pahang’s coastline 彭亨州海岸形态变化及其对台风的响应

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-04 DOI: 10.1016/j.rsma.2026.104834

Muhammad Zahir Ramli , Siti Nur Hanani Zainuddin , Mohd Shahrizal Ab Razak , Muhammad Mazmirul Abd Rahman , Siti Nurain Che Mohd Azmi , Muhammad Rizal Razali , Effi Helmy Ariffin

Coastal erosion remains a major concern along the Pahang coastline, where monsoon-driven waves and episodic typhoon-generated swells accelerate shoreline retreat and endanger coastal communities. Notably, even though Pahang faces the South China Sea, it is located outside the primary typhoon corridor. This study integrates two decades of satellite-derived shoreline analysis with storm-scale numerical modelling to evaluate both chronic and event-driven coastal change. Geospatial Information System (GIS) tools analyzed shoreline changes over 21 years (2000–2022) using Landsat 5, Landsat 8, and Sentinel-2 MSI data, with shoreline positions quantified through the Digital Shoreline Analysis System (DSAS) using net shoreline movement (NSM) and linear regression rate (LRR). Results indicate persistent long-term erosion, particularly at Cherok Paloh, where retreat rates reached –3.5 to –5.2 m/yr. Beach profiling conducted before and after Typhoon Rai revealed short-term sediment losses of 21.69–72.12 m³ /m across four transects. A process-based XBeach model, calibrated using pre- and post-storm profiles, successfully reproduced storm-induced morphological change with Brier Skill Scores (BSS) between 0.82 and 0.97. The 2D simulation further identified erosion hotspots south of the Pahang Tua River mouth and localised deposition influenced by river–wave interactions. By linking long-term shoreline trends with storm-event hydrodynamics, this study demonstrates a multiscale framework capable of supporting early warning systems and informing nature-based coastal management strategies along Malaysia’s storm-sensitive coastline.

海岸侵蚀仍然是彭亨州海岸线的一个主要问题，在那里，季风驱动的海浪和偶尔发生的台风产生的巨浪加速了海岸线的退缩，危及沿海社区。值得注意的是，尽管彭亨州面向南中国海，但它位于主要台风走廊之外。本研究将二十年来的卫星岸线分析与风暴尺度数值模拟相结合，以评估长期和事件驱动的海岸变化。地理空间信息系统（GIS）工具使用Landsat 5、Landsat 8和Sentinel-2 MSI数据分析了21年来（2000-2022年）的海岸线变化，并通过数字海岸线分析系统（DSAS）利用净海岸线移动（NSM）和线性回归率（LRR）量化了海岸线位置。结果表明持续的长期侵蚀，特别是在Cherok Paloh，其退缩率达到-3.5至-5.2 m/年。在台风前后进行的海滩剖面显示，四个样带的短期泥沙损失为21.69-72.12 m³ /m。基于过程的XBeach模型，使用风暴前后的剖面进行校准，成功地再现了风暴引起的形态变化，Brier技能分数（BSS）在0.82至0.97之间。二维模拟进一步确定了彭亨图瓦河口以南的侵蚀热点，以及受河波相互作用影响的局部沉积。通过将长期海岸线趋势与风暴事件流体动力学联系起来，本研究展示了一个多尺度框架，能够支持早期预警系统，并为马来西亚风暴敏感海岸线沿线基于自然的海岸管理策略提供信息。

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引用次数: 0

Tracing sediment provenance in Central Jiangsu tidal flat: Quantitative analysis of grain size and geochemical elements 苏中潮滩沉积物物源示踪：粒度和地球化学元素定量分析

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-04 DOI: 10.1016/j.rsma.2026.104835

Yanxia Li , Yang Li , Ziyang Zhang , Min Xu

Tidal flats are dynamic coastal systems whose stability relies on continuous sediment supply, yet sediment provenance in the central Jiangsu tidal flats remains poorly constrained, especially under reduced fluvial input and complex tidal forcing. This study aimed to quantify sediment sources, grain-size distributions, and their elevation-dependent patterns across these tidal flats. Surface sediments were collected from 12 transects in 2023 and analyzed using grain-size measurements, geochemical fingerprinting, and quantitative mixing models (FingerPro), incorporating a normalized tidal elevation framework to account for cross-shore and latitudinal variations. The main findings are: (1) The North Jiangsu Radial Sand Ridges (NJRSR) are the dominant sediment source, contributing ∼50 % of surface sediments, followed by the Old Yellow River Delta (∼26 %) and the Yangtze River (∼24 %), highlighting the overlooked but critical role of NJRSR in maintaining the sediment budget. (2) Grain size decreases with increasing tidal elevation, from a wide range (20–120 μm) at low-tide levels to finer, more homogeneous sediments at high-tide flats, reflecting hydrodynamic sorting and shoreline erosion patterns. (3) Mean grain size increases offshore, closely corresponding to NJRSR contributions, supporting the use of sediment texture as a proxy for provenance, although tracer elements were decoupled from grain-size variations due to dynamic redistribution. (4) Integrating elevation-dependent grain-size patterns with geochemical tracers provides a robust framework for interpreting sedimentary processes and source contributions. These results advance understanding of sediment dynamics, tidal flat evolution, and coastal resilience, offering methodological and conceptual insights applicable to other large tidal flat systems worldwide.

潮滩是动态海岸系统，其稳定性依赖于持续的泥沙供应，但苏中潮滩的沉积物来源仍不明确，特别是在河流输入减少和复杂潮汐强迫的情况下。本研究旨在量化这些潮滩的沉积物来源、粒度分布及其海拔依赖模式。研究人员于2023年从12个样带收集了表层沉积物，并使用粒度测量、地球化学指纹和定量混合模型（FingerPro）进行了分析，并结合了标准化潮汐高程框架来解释跨海岸和纬度变化。结果表明：(1)苏北辐射状沙脊（NJRSR）是主要的泥沙来源，贡献了约50% %的地表泥沙，其次是老黄河三角洲（~ 26% %）和长江（~ 24% %），突出了苏北辐射状沙脊在维持泥沙平衡方面被忽视但至关重要的作用。(2)随着潮汐高度的增加，沉积物粒度逐渐减小，从低潮时的大范围（20 ~ 120 μm）到高潮时的更细、更均匀，反映了水动力分选和岸线侵蚀模式。(3)近海平均粒度增加，与NJRSR贡献密切相关，支持使用沉积物质地作为物源的代表，尽管示踪元素由于动态再分配而与粒度变化分离。(4)将高程相关粒度模式与地球化学示踪剂相结合，为解释沉积过程和物源贡献提供了强有力的框架。这些结果促进了对沉积物动力学、潮滩演化和海岸恢复力的理解，提供了适用于全球其他大型潮滩系统的方法和概念见解。

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引用次数: 0

Biodiversity and vertical distribution of pelagic cephalopods in the Western Tropical Atlantic 西热带大西洋中上层头足类生物多样性及垂直分布

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-02-03 DOI: 10.1016/j.rsma.2026.104829

Andreza da Silva Nascimento , Leandro Nolé Eduardo , Arnaud Bertrand , Teodoro Vaske-Júnior , Thierry Frédou , Michael Maia Mincarone , Flávia Lucena-Frédou

We propose an integrative analysis of the diversity and distribution of pelagic cephalopods collected in the Western Tropical Atlantic (WTA), encompassing the Amazon River mouth and the oceanic islands and seamounts of the Fernando de Noronha Ridge. A total of 1270 specimens were collected from surface waters down to 1500 m depth, representing 33 species and two taxa identified at the genus level, distributed among 31 genera, 19 families, and six orders. The known distribution ranges of at least ten species are extended, and new occurrence records are provided for several rare species. The assemblage was dominated by Abralia veranyi, Japetella diaphana, Enoploteuthis anapsis, and Vampyroteuthis infernalis, which accounted for most of the abundance and biomass, and whose ecological roles are further discussed. Comparisons with data from other oceanic regions indicate that tropical cephalopod assemblages exhibit lower species richness than those from temperate zones, a pattern that contrasts with trends observed in other pelagic taxa occupying similar environments. Overall, this study provides the first comprehensive assessment of pelagic cephalopod diversity in the WTA, establishing an essential ecological baseline for this poorly known deep-pelagic fauna and supporting future biodiversity monitoring and management efforts in the region.

本文对亚马孙河河口、费尔南多-迪诺罗尼亚海岭的海洋岛屿和海山等西热带大西洋海域收集的远洋头足类动物的多样性和分布进行了综合分析。在1500 m以下的表层水域共采集标本1270份，属级标本33种，2个分类群，隶属于6目19科31属。扩大了至少10种已知的分布范围，并为一些稀有物种提供了新的发生记录。该组合以abalia veranyi、Japetella diaphana、Enoploteuthis anapsis和Vampyroteuthis innalis为主，占丰度和生物量的大部分，并进一步讨论了它们的生态作用。与其他海洋地区的数据比较表明，热带头足类动物群落的物种丰富度低于温带地区的物种丰富度，这一模式与在占据类似环境的其他远洋分类群中观察到的趋势形成对比。总体而言，本研究首次全面评估了WTA中上层头足类动物的多样性，为这一鲜为人知的深中上层动物建立了重要的生态基线，并为该地区未来的生物多样性监测和管理工作提供了支持。

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