Estuarine Coastal and Shelf Science最新文献_第6页

Organic carbon in the water column and sediment of the eastern Adriatic Sea coastal and transitional waters 亚得里亚海东部沿海和过渡水域水柱和沉积物中的有机碳

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-15 DOI: 10.1016/j.ecss.2025.109659

Jelena Dautović , Iva Dominović Novković , Niki Simonović, Irena Ciglenečki

This study presents multi-year (2016–2022) results on the spatial and temporal distribution of dissolved organic carbon (DOC) along the eastern Adriatic coast, as well as total organic carbon (TOC) concentrations in surface sediments at the same coastal and transitional stations. Based on DOC concentration thresholds for oligotrophic (<1.440 mg/L), mesotrophic (1.800–2.500 mg/L), and eutrophic (>2.500 mg/L) conditions, the majority of coastal waters along the eastern Adriatic can be classified as oligotrophic.

Episodic mesotrophic to eutrophic conditions were observed primarily during summer and autumn in both surface and bottom layers at specific locations, including the Gulf of Rijeka (including the port of Rijeka), parts of Kvarner Bay (Bay of Bakar), the Port of Pula, and the Lim Channel in the northern Adriatic (NA), as well as Brač–Split Channel, Kaštela Bay, and Pašman–Zadar Channel in the middle Adriatic (MA). Transitional waters of the rivers Rječina, Mirna, Raša (NA), and Krka (MA) also exhibited episodic mesotrophic–eutrophic conditions. According to monitoring data, the Gulf of Rijeka shifted from a “very good” to a “good” trophic status in 2022.

Elevated sediment TOC (>1.5 %) was generally observed at stations where DOC concentrations in the water column were high, including Brač–Split Channel, and the rivers Cetina and Jadro (MA), as well as Raša, Mirna, and Dragonja (NA). The highest sediment TOC (6.3 %) was recorded in the Bay of Bakar and the Port of Pula (NA), reflecting eutrophic conditions in the overlying water column. An exception was observed at station FP-P5b Ploče/Neretva (SA), where relatively high sediment TOC (up to 4.0 %) was recorded in all monitored years, despite DOC concentrations in the water column remaining within oligotrophic levels (≤1.44 mg/L). In light of the continuous intensification of anthropogenic pressures (tourism, maritime traffic, aquaculture and agriculture), these regions are likely to be highly susceptible to ecological degradation under future climate scenarios, underscoring the need to prioritize them in coastal management plans and long-term monitoring initiatives.

本文研究了亚得里亚海东部沿海溶解有机碳（DOC）的时空分布，以及相同海岸和过渡站表层沉积物中总有机碳（TOC）浓度的多年（2016-2022）结果。根据低营养（1.440 mg/L）、中营养（1.800-2.500 mg/L）和富营养（2.500 mg/L）条件下的DOC浓度阈值，亚得里亚海东部大部分沿海水域可归类为低营养。在特定地点的表层和底层，主要在夏季和秋季观测到间歇性中营养化到富营养化状况，包括里耶卡湾（包括里耶卡港）、Kvarner湾（巴卡尔湾）的部分地区、普拉港和北部亚得里亚海的Lim海峡（NA），以及中部亚得里亚海的bra - split海峡、Kaštela湾和Pašman-Zadar海峡（MA）。rje ina河、Mirna河、Raša河（NA）和Krka河（MA）的过渡水域也表现出间歇性中营养化-富营养化状况。根据监测数据，里耶卡湾在2022年从“非常好”的营养状态转变为“良好”的营养状态。在水体DOC浓度较高的站点，包括bra - split Channel、Cetina和Jadro河（MA）以及Raša、Mirna和Dragonja河（NA），沉积物TOC普遍升高（> 1.5%）。巴卡尔湾和普拉港（NA）的沉积物TOC最高（6.3%），反映了上覆水体的富营养化状况。在FP-P5b plo e/Neretva （SA）站观察到一个例外，尽管水柱中的DOC浓度保持在低营养水平（≤1.44 mg/L），但在所有监测年份中都记录到相对较高的沉积物TOC（高达4.0%）。鉴于人为压力（旅游业、海上交通、水产养殖和农业）的不断加剧，这些地区在未来气候情景下很可能极易受到生态退化的影响，因此需要在沿海管理计划和长期监测举措中优先考虑这些地区。

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引用次数: 0

Observations on “Summary reply to ‘Discussion: Tidal variation and flow dynamics in Indian Sundarban based on field observation and numerical models’ by Das et al. (2025). DOI: https://doi.org/10.1016/j.ecss.2025.109526” Das et al.（2025）对“讨论：基于野外观测和数值模型的印度孙德班潮汐变化和流动动力学”的简要答复”的观察。DOI: https://doi.org/10.1016/j.ecss.2025.109526”

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-15 DOI: 10.1016/j.ecss.2025.109670

Sayantan Das , Swati Ghosh , Deeprita Ghosh , Abhijit Das , Sunando Bandyopadhyay

引用次数: 0

Implications of surface modifying on seawall hydrodynamics performance: Reflection and run-up / down 表面改性对海堤水动力性能的影响：反射和上升/下降

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-13 DOI: 10.1016/j.ecss.2025.109666

May R. ElKotby , Omnia Abouelsaad , Ali Masria

This research investigates the wave reflection coefficient (Kr) and relative wave run-up/run-down behavior of vertical and inclined seawalls (SW) used for shoreline protection against hydrodynamic forces (e.g., waves, storm surges, sea-level rise). Tests focused on how the performance of the SW under various regular wave heights and periods was affected by either the presence of an offshore structure in front of the wall or the placement of uniformly energy-dissipating blocks (EDB) of triangular or trapezoidal geometries on the SW surface. The results indicate that Kr decreases as wave steepness (H_i/gT²), relative depth (d/L_i), and relative submerged width (B/L) increases, and as seawall slope (cot θ) decreases. These parameters were more effective in controlling wave hydrodynamic characteristics than the surf similarity parameter (ξ). Notably, the performance of a 45° sloping plane SW was substantially enhanced by adding horizontal reversed-triangle blocks with a narrow spacing (S/W = 1), resulting in a reduction in Kr of approximately 37 %–49 %. The addition of a submerged breakwater (SB) in front of a vertical SW decreased Kr and relative run-up (R_u/H_i) by about 29 %–46 % and 5 %–34 %, respectively, compared to the plane SW alone. Non-linear regression analysis (SPSS v23) was also used to generate new predictive formulas for the reflection coefficient, relative wave run-up, and run-down based on the experimental results.

本研究研究了用于海岸线保护的垂直和倾斜海堤（SW）的波浪反射系数（Kr）和相对波浪上升/下降行为（例如波浪，风暴潮，海平面上升）。测试的重点是在不同规则波高和周期下，西南波的性能如何受到墙前海上结构或在西南波表面放置三角形或梯形均匀耗能块（EDB）的影响。结果表明：Kr随波浪陡度（Hi/gT2）、相对深度（d/Li）、相对淹没宽度（B/L）的增大和海堤坡度（cot θ）的减小而减小；这些参数比冲浪相似度参数（ξ）更能有效地控制波浪水动力特性。值得注意的是，通过添加窄间距（S/W = 1）的水平倒三角形块，45°倾斜平面SW的性能得到了显著提高，导致Kr降低了约37% - 49%。在垂直西南偏南前增加一个水下防波堤（SB），与单独的平面西南偏南相比，Kr和相对爬高（Ru/Hi）分别降低了29% - 46%和5% - 34%。利用SPSS v23软件进行非线性回归分析，根据实验结果生成新的反射系数、相对波速和损耗的预测公式。

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引用次数: 0

European anchovy, Engraulis encrasicolus - an ecologically and economically important species in the Adriatic Sea: a review 欧洲凤尾鱼——亚得里亚海重要的生态和经济物种：综述

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-11 DOI: 10.1016/j.ecss.2025.109665

Romina Kraus , Vjekoslav Tičina

The anchovy (Engraulis encrasicolus, L.) is one of the key species in the Adriatic ecosystem, but it is also a healthy source of protein and essential fatty acids for the human diet. The demand for this fishery resource is therefore high, especially in the Adriatic. Despite the management measures taken in the past, anchovy in the Adriatic is now overfished and overexploited.

The aim of this review was to summarise knowledge on different aspects and information from the published literature on anchovy in the Adriatic Sea in order to provide a reliable basis for future research efforts aimed at sustainable ecosystem-based management of anchovy fisheries in the Adriatic Sea. To achieve this, we have prepared six sections: Adriatic Sea - Distribution area, Biology and Ecology, Stock Identity, Estimations of Anchovy Stock in the Adriatic Sea, Consumption (Anchovy as Seafood) and Management and Future Projections.

The fluctuating anchovy catches in recent decades clearly demonstrate the need for sustainable exploitation of this resource, which should be considered as an integral part of the marine ecosystem in the Adriatic. Therefore, a more holistic approach to management and research should be pursued in the future, orientated towards the needs of the ecosystem and taking into account the different ecosystem services/users as well as the interactions between the different species. An important factor for possible future changes in anchovy populations in marine ecosystems is the ongoing climate change, which should be taken into account in future studies on anchovies.

凤尾鱼（Engraulis encrasicolus， L.）是亚得里亚海生态系统中的关键物种之一，也是人类饮食中蛋白质和必需脂肪酸的健康来源。因此，对这种渔业资源的需求很高，特别是在亚得里亚海。尽管过去采取了管理措施，但亚得里亚海的凤尾鱼现在被过度捕捞和过度开发。本综述的目的是总结亚得里亚海凤尾鱼的不同方面的知识和信息，以便为未来亚得里亚海凤尾鱼渔业可持续生态系统管理的研究工作提供可靠的基础。为了实现这一目标，我们准备了六个部分：亚得里亚海-分布区域、生物学和生态学、种群特征、亚得里亚海鳀鱼种群的估计、消费（鳀鱼作为海鲜）和管理和未来预测。近几十年来凤尾鱼捕鱼量的波动清楚地表明需要可持续地开发这种资源，应将其视为亚得里亚海海洋生态系统的一个组成部分。因此，今后应采取更全面的管理和研究方法，以生态系统的需要为导向，并考虑到不同的生态系统服务/用户以及不同物种之间的相互作用。未来海洋生态系统中凤尾鱼种群可能发生变化的一个重要因素是持续的气候变化，在未来的凤尾鱼研究中应考虑到这一点。

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引用次数: 0

“Groundwater and ferromanganese oxide-coated calcareous concretion release excess radon to the southwestern Yellow Sea” 地下水和氧化锰铁覆盖的钙质固结物向黄海西南部释放过量的氡。

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-11 DOI: 10.1016/j.ecss.2025.109664

Shibin Zhao , Qingzhen Yao , Disong Yang , Xiaoyi Guo , Chunqian Li , Wen Liu , Yuan Lu , Zhigang Yu , Bochao Xu

As a natural-occurring radioisotope, radon (²²²Rn, t_1/2 = 3.82 d) is generally enriched in groundwater than surface water, which has been routinely applied to trace submarine groundwater discharge (SGD) process in coastal regions. However, the high ²²²Rn content in coastal seawater may not always be attributed to SGD solely, especially when encountering with specific sedimentary sources on the seafloor. In this study, we systematically investigated the radon distribution in water columns in the southwestern Yellow Sea. Highest ²²²Rn activity (reaching ∼280 Bq m⁻³) appeared in coastal bottom seawaters between 119.5–120.5°E along the 35°N transect, which were 2−4 times of that in surface waters under stratified condition. The excess ²²²Rn are likely attributed to bottom-up mechanisms. By combining laboratorial incubation, gamma spectrometry and laser-induced breakdown spectroscopy measurements, we found the widespread ferromanganese oxide-coated calcareous concretions on the seafloor can extract ²²⁶Ra from seawater, resulting in a radon diffusional flux ∼3 times greater than surrounding sandy/muddy sediments. Total SGD flux and water residence time in the southwestern Yellow Sea were solved through the radon-radium mass balances and Monte Carlo simulation approaches, which were 1.1 (0.6–2.0) × 10⁹ m³ d⁻¹ or 0.078 (0.042–0.14) m d⁻¹ and ∼35 days. SGD played the dominating role (58.6 %–69.9 %) in controlling radon inventory in water bodies under stratified condition, followed by diffusion from sedimentary sources (20.5 %–31.2 %) and parent ²²⁶Ra production (9.3 %–10.5 %). Our findings highlight the radium enrichment mechanism of Fe/Mn oxide-rich concretion may be overlooked in radon-based tracer studies, potentially compromising the accuracy of SGD quantification.

氡（222Rn, t1/2 = 3.82 d）作为一种天然存在的放射性同位素，在地下水中的富集程度普遍高于地表水，已常规应用于沿海地区海底地下水排放（SGD）过程的追踪。然而，沿海海水中222Rn的高含量可能并不总是完全归因于SGD，特别是当遇到海底特定的沉积源时。本文系统地研究了黄海西南部水柱中氡的分布。在35°N样带119.5 ~ 120.5°E之间的沿海海底，222Rn活度最高（达到~ 280 Bq m−3），是分层条件下地表水活度的2 ~ 4倍。过量的222Rn可能归因于自下而上的机制。通过结合实验室培养、伽马能谱和激光诱导击穿光谱测量，我们发现海底广泛存在的氧化锰铁包覆的钙质结块可以从海水中提取226Ra，导致氡扩散通量比周围的砂质/泥质沉积物大3倍。通过氡-镭质量平衡和蒙特卡罗模拟方法求解黄海西南部SGD总通量和水停留时间，分别为1.1 （0.6-2.0）× 109 m3 d - 1或0.078 (0.042-0.14)m d - 1和~ 35天。在分层条件下，SGD对水体氡库存量的控制作用最大（58.6% ~ 69.9%），其次是沉积源扩散（20.5% ~ 31.2%）和母源226Ra产量（9.3% ~ 10.5%）。我们的研究结果强调了富Fe/Mn氧化物结块的镭富集机制可能在基于氡的示踪剂研究中被忽视，这可能会影响SGD定量的准确性。

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引用次数: 0

Widespread breaching of intermittent estuaries by atmospheric rivers: A satellite-based assessment in central-southern Chile 大气河流对间歇性河口的广泛破坏：智利中南部的卫星评估

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-11 DOI: 10.1016/j.ecss.2025.109663

Raúl P. Flores , Óscar Milla , Martina Monasterio , Carlos Lara , Isabel Caballero

Small estuaries and coastal lagoons, which are common in Mediterranean climates such as California, Australia and central Chile, are ecologically important systems that can alternate between open (ocean-connected) and closed states depending on the balance between river discharge and wave-driven sediment transport. Under drought conditions, these systems can remain closed for extended periods, which alters hydrodynamic, sedimentary, and ecological processes. This study examines the response of small intermittent estuarine systems to two atmospheric river (AR) events that impacted central Chile in 2023, delivering extreme precipitation, sharp increases in river discharge, and widespread flooding. Using high-resolution satellite imagery and open-source image processing algorithms, we tracked the state of 176 river mouths between 32°S and 38°S, documenting breaching and subsequent closure in the following months. Our results show that the vast majority of river mouths and coastal lagoons re-established connectivity with the ocean after the ARs, including several that had remained closed for multiple years. Subsequent inlet closures followed a clear north-to-south latitudinal progression, consistent with the transition to wetter climates. Analysis of river discharge and inlet width revealed a strong correlation for Andean-fed rivers with sustained baseflows, while this link was weaker for small coastal rivers that were closed prior to the ARs. The combined analysis of river discharge, wave forcing and inlet state data suggests a nonlinear response in which the timing and sequencing of fluvial and wave forcings govern inlet state transitions. Overall, our findings demonstrate that ARs, which are projected to increase in frequency, can rapidly reset coastal morphology and temporarily restore ocean connectivity in drought-impacted Mediterranean-type coasts.

在加利福尼亚、澳大利亚和智利中部等地中海气候中常见的小河口和沿海泻湖是生态上重要的系统，可以在开放（与海洋相连）和封闭状态之间交替，这取决于河流流量和波浪驱动的沉积物运输之间的平衡。在干旱条件下，这些系统可以长时间保持关闭，这改变了水动力、沉积和生态过程。本研究考察了小型间歇性河口系统对2023年影响智利中部的两个大气河流（AR）事件的响应，这些事件带来了极端降水、河流流量急剧增加和大范围洪水。利用高分辨率卫星图像和开源图像处理算法，我们追踪了176个位于32°S至38°S之间的河口的状态，记录了在接下来的几个月里河口的破裂和随后的关闭。我们的研究结果表明，绝大多数河口和沿海泻湖在ARs之后重新建立了与海洋的连通性，包括几个多年来一直关闭的河口和泻湖。随后的入口关闭遵循一个明显的从北向南的纬度进程，与向湿润气候的过渡相一致。对河流流量和入口宽度的分析显示，安第斯山脉的河流与持续的基流有很强的相关性，而这种联系对于在ARs之前关闭的沿海小河流来说较弱。对河流流量、波浪强迫和进水口状态数据的综合分析表明，河流和波浪强迫的时间和顺序决定了进水口状态的转变，这是一种非线性响应。总体而言，我们的研究结果表明，预计频率会增加的ar可以迅速重置沿海形态，并暂时恢复受干旱影响的地中海型海岸的海洋连通性。

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引用次数: 0

Distribution of benthic communities in a hypertidal estuary: Mapping potential prey resources for juvenile common sole Solea solea 高潮河口底栖生物群落分布：绘制普通鳎幼鱼的潜在猎物资源

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-10 DOI: 10.1016/j.ecss.2025.109660

Marion Lefebvre du Prey , Ross Griffin , James E. Stewart , Emma Sheehan , Anna Sturrock , Benjamin J. Ciotti

Benthic macrofauna of the intertidal zone in the Severn Estuary was characterised, and its implications for potential food availability for juvenile common sole (Solea solea), a commercially valuable species, were discussed. Although the Severn Estuary supports fish assemblages of conservation interest, its role in sustaining juvenile fish populations remains poorly understood. Identifying high-quality habitats for juvenile sole is essential for effective conservation planning and ecosystem-based management. Direct measurements of habitat quality, such as fish abundance, growth, and contributions to adult population are challenging to obtain in hypertidal, complex systems like the Severn Estuary. Therefore, existing high-resolution benthic datasets were used to provide a first-order approximation of habitat quality and establish a baseline for future investigations. Because food availability strongly influences fish growth, distribution, and survival, examining prey assemblages offers valuable ecological insight. Benthic community structure was described across the intertidal area and statistically related to environmental variables, with a particular focus on habitat type. Results indicate that Habitats of Conservation Interest (seagrass beds and Sabellaria alveolata reefs) support greater potential prey diversity, whereas mudflats host higher potential prey biomass. Given the extensive mudflats in the estuary and the abundance of key sole prey taxa they harbour, intertidal mudflats are likely important feeding grounds for juvenile common sole. This study represents the most comprehensive invertebrate survey of the area, providing crucial insights into potential prey availability for juvenile common sole. These findings can inform conservation and management strategies in the Severn Estuary.

介绍了塞文河口潮间带底栖大型动物的特征，并讨论了其对具有商业价值的鳎（Solea Solea）幼鱼的潜在食物供应的影响。尽管塞文河口支持具有保护意义的鱼类群落，但其在维持幼鱼种群中的作用仍然知之甚少。确定高质量的鳎幼鱼栖息地对有效的保护规划和基于生态系统的管理至关重要。直接测量栖息地质量，如鱼类丰度、生长和对成年人口的贡献，在像塞文河口这样的潮汐复杂系统中是具有挑战性的。因此，利用现有的高分辨率底栖动物数据集提供栖息地质量的一阶近似，并为未来的调查建立基线。由于食物的可获得性强烈地影响鱼类的生长、分布和生存，因此检查猎物组合提供了有价值的生态学见解。描述了整个潮间带的底栖生物群落结构，并在统计上与环境变量相关，特别关注栖息地类型。结果表明，具有保护价值的生境（海草床和沙ellaria alveolata礁）支持更大的潜在猎物多样性，而泥滩具有更高的潜在猎物生物量。考虑到河口广泛的泥滩和它们所庇护的主要猎物类群的丰富程度，潮间带泥滩可能是普通鳎幼鱼的重要觅食地。这项研究代表了该地区最全面的无脊椎动物调查，为普通鳎幼鱼的潜在猎物可用性提供了重要的见解。这些发现可以为塞文河口的保护和管理策略提供信息。

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引用次数: 0

Microplastics in the surface water of three Egyptian northern lakes 埃及北部三个湖泊地表水中的微塑料

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-10 DOI: 10.1016/j.ecss.2025.109661

Soha H. Shabaka, Abeer A.M. El-Sayed, Safaa A. Abdel Ghani, Aida H. Shobier, Mohamed A. Shreadah

Microplastics (MPs) are widespread pollutants, yet limited data exist on their distribution in coastal lagoon systems. This study aimed to evaluate MPs pollution in surface water of three Egyptian northern lakes: Manzala, Edku, which are linked to the Mediterranean Sea and inland Mariout Lake. Water samples were collected using a 300 μm manta trawl, and MPs were quantified and characterized. The results showed average concentrations of 0.82 ± 0.70, 0.09 ± 0.06, 0.33 ± 0.19 particles/m³ for Manzala, Edku and Mariout lakes, respectively. The dominant MPs shapes included transparent films (46.10 % in Manzala and 36.35 % in Mariout) and red fibers (69.19 % in Edku). Fourier-transform infrared spectroscopy (FTIR-ATR) identified polypropylene (PP), polystyrene (PS) and polyethylene (PE) as the predominant polymers. The high abundance of PP reflects the role of anthropogenic sources, such as domestic sewage, fishing waste, and agricultural runoff. Differential Scanning Calorimetry (DSC) analysis detected other polymer types in smaller proportions. The Pollution Load Index (PLI) indicated low-risk levels (mean values < 10) across all lakes. However, the Polymer Hazard Index (PHI) revealed that Edku Lake (PHI >10, Category II) posed a higher risk, while Manzala and Mariout Lakes fell into a lower-risk category. As the first study to document MPs pollution in these lakes, our work establishes a critical baseline for future monitoring and highlights the potential for these ecosystems to act as conduits for MPs entering the Mediterranean. Targeted management strategies to mitigate MPs inputs into these interconnected aquatic systems are urgently needed.

微塑料（MPs）是一种广泛存在的污染物，但关于其在沿海泻湖系统中的分布数据有限。这项研究旨在评估埃及北部三个湖泊地表水中的MPs污染：Manzala， Edku，这三个湖泊与地中海和内陆的Mariout湖相连。采用300 μm蝠鲼拖网采集水样，对MPs进行定量和表征。结果表明，Manzala湖、Edku湖和Mariout湖的平均浓度分别为0.82±0.70、0.09±0.06、0.33±0.19颗粒/m3。MPs的主要形态包括透明膜（Manzala为46.10%，Mariout为36.35%）和红色纤维（Edku为69.19%）。傅里叶变换红外光谱（FTIR-ATR）鉴定聚丙烯（PP）、聚苯乙烯（PS）和聚乙烯（PE）为主要聚合物。PP的高丰度反映了人为来源的作用，如生活污水、渔业废物和农业径流。差示扫描量热法（DSC）分析检测到其他类型的聚合物在较小的比例。污染负荷指数（PLI）显示所有湖泊的低风险水平（平均值<； 10）。然而，聚合物危害指数（PHI）显示，Edku湖（PHI >10， II类）具有较高的风险，而Manzala和Mariout湖属于较低的风险类别。作为第一个记录这些湖泊中MPs污染的研究，我们的工作为未来的监测建立了一个关键的基线，并强调了这些生态系统作为MPs进入地中海通道的潜力。迫切需要有针对性的管理战略，以减少MPs对这些相互关联的水生系统的投入。

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引用次数: 0

Temporal variation of the bioengineering Lepidophthalmus siriboia (Decapoda: Callichiridae) and associated macrofauna on macrotidal sandy beaches of Amazon coast 亚马孙河沿岸大潮沙滩生物工程水蛭及其伴生大型动物群的时间变化

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-09 DOI: 10.1016/j.ecss.2025.109656

Thuareag Monteiro Trindade dos Santos , Rita de Cássia Gonçalves Andrade , Marcelo Petracco , Daiane Aviz

The callichiridae decapod Lepidophthalmus siriboia Felder and rodrigues, 1993 is an important species of marine bioengineers in shallow soft-bottom habitats, where they modify key environmental features and maintain a mosaic of habitats that are favorable to several organisms. Despite its extensive distribution and high abundance in the Amazon coast, distribution spatial e temporal data from this species and for its associated fauna are scarce. This study aimed to characterize distribution patterns of the ghost shrimp L. siriboia and macrobenthic community that inhabits its gallery along the intertidal zone on Amazonian macrotidal sandy beaches. Samples were collected in May (rainy period) and November (dry period) 2019 in the intertidal zone of two beaches of the Algodoal-Maiandeua Island (Northern Brazil): Beira beach and Caixa d’água beach. Overall, L. siriboia density was higher in Beira beach and had higher density at lower intertidal zone in the rainy period likely reflecting increased sediment moisture. In contrast, density and species richness were higher in Beira beach and in the dry period when salinity is higher. Also, our study always found higher density and richness of beaches and zones with high density of L. siriboia burrows in comparison with beaches and zones with low density of burrows, highlighting the importance of this crustacean as bioengineering in the sandy beaches of the Amazonian region.

的callichiridae十足类动物Lepidophthalmus siriboia镶嵌地块和罗德里格斯,1993是一个重要的物种的海洋工程师们在浅软底的栖息地,他们修改关键的环境特性和维持一个马赛克有利于一些生物的栖息地。尽管其在亚马逊海岸分布广泛且丰度高，但该物种及其伴生动物群的分布时空数据很少。本研究旨在研究亚马孙大潮沙滩潮间带的幽灵虾及其大型底栖生物群落的分布模式。样品于2019年5月（雨季）和11月（旱季）在Algodoal-Maiandeua岛（巴西北部）两个海滩的潮间带：Beira海滩和Caixa d ' água海滩采集。总体而言，贝拉海滩的水蛭密度较高，雨季潮间带下游的水蛭密度较高，这可能反映了沉积物湿度的增加。相比之下，贝拉海滩和盐度较高的干燥期密度和物种丰富度较高。此外，我们的研究发现，与洞穴密度低的海滩和区域相比，具有高密度洞穴的海滩和区域的密度和丰富度更高，突出了这种甲壳类动物在亚马逊地区沙滩上作为生物工程的重要性。

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引用次数: 0

Patterns of trophic niche overlap of diadromous and marine Arctic fishes in Beaufort Sea coastal lagoons 波弗特海沿岸泻湖北极双生鱼类和海洋鱼类营养生态位重叠模式

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-09 DOI: 10.1016/j.ecss.2025.109657

Sydney Wilkinson , Lara Horstmann , Benjamin D. Barst , Todd Sformo , Trent Sutton , Kenneth Dunton , Katrin Iken

Ongoing climatic changes in the coastal Arctic can influence the food webs that support a variety of fish species and subsistence fisheries in coastal lagoons. Along the Beaufort Sea coast, lagoons provide productive summer feeding habitats for both diadromous fishes migrating from freshwater and marine fishes migrating from the shelf. We compared trophic niche size and niche overlap between diadromous species, Arctic Cisco (Coregonus autumnalis), Least Cisco (Coregonus sardinella), and Dolly Varden (Salvelinus malma), and marine species, Polar Cod (Boreogadus saida), Fourhorn Sculpin (Myoxocephalus quadricornis), and Saffron Cod (Eleginus gracilis), across lagoon systems differing in freshwater input and oceanic exchange. Using complementary biomarkers (stomach contents, bulk δ¹³C and δ¹⁵N, compound-specific amino acid δ¹³C, and fatty acid profiles), we found that diadromous fishes consistently exhibited broader trophic niches than marine fishes, reflecting their ability to exploit both freshwater and offshore pelagic resources. Trophic overlap occurred across the two life histories in both lagoon types, but was greater in high-exchange lagoons, primarily due to shared reliance on amphipods, mysids, and marine carbon sources. Considering the different biomarker turnover times, this overlap likely extends from late winter ice cover into open water periods. These results suggest that competition for prey is probable among species with contrasting life histories, particularly during periods of low prey abundance. By resolving seasonal and spatial patterns of trophic overlap, our findings provide important baseline knowledge for modeling future scenarios of lagoon connectivity and for informing subsistence fisheries management under ongoing changes in the Arctic.

北极沿海地区持续的气候变化可能影响支持沿海泻湖各种鱼类和自给渔业的食物网。沿着波弗特海岸，泻湖为从淡水洄游的双产卵鱼类和从大陆架洄游的海洋鱼类提供了丰富的夏季觅食栖息地。我们比较了在不同淡水输入和海洋交换的泻湖系统中，双栖物种北极科鱼（Coregonus秋季）、最小科鱼（Coregonus沙丁鱼）和Dolly Varden （Salvelinus malma）与海洋物种极地科鱼（Boreogadus saida）、四角科鱼（Myoxocephalus quadricornis）和藏红花科鱼（Eleginus gracilis）的营养生态位大小和生态位重叠。利用互补生物标志物（胃内容物、体积δ13C和δ15N、化合物特异性氨基酸δ13C和脂肪酸谱），研究人员发现，与海洋鱼类相比，二产卵鱼始终表现出更广泛的营养生态位，反映了它们开发淡水和近海远洋资源的能力。在两种类型的泻湖中，两种生活史都发生了营养重叠，但在高交换泻湖中，营养重叠更大，这主要是由于它们共同依赖片足类动物、豆科动物和海洋碳源。考虑到不同的生物标志物转换时间，这种重叠可能从冬末冰盖延伸到开放水域。这些结果表明，具有不同生活史的物种之间可能存在对猎物的竞争，特别是在猎物丰度较低的时期。通过解决营养重叠的季节和空间模式，我们的研究结果为模拟未来泻湖连通性情景提供了重要的基线知识，并为北极持续变化下的自给渔业管理提供了信息。

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