Estuarine Coastal and Shelf Science最新文献_第5页

Conservation of the Varkala coastal cliff, a National Geoheritage site along the southwestern coast of India: A geo-environmental approach 保护Varkala海岸悬崖，沿印度西南海岸的国家地质遗产：地质环境方法

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-22 DOI: 10.1016/j.ecss.2025.109672

L. Sheela Nair , M.K. Rafeeque , V. Nandakumar , V.I. Tiju , N. Sreejith , D. Padmalal

The Varkala cliff in the SW coast of India, with its expansive frontal beaches, has the distinction of being the 27th National Geological Monument in India, and efforts are underway to get this unique geological marvel recognised as a geopark. However, the existence of this cliff, belonging to the Warkalli Formation of Mio-Pliocene age, has been threatened in recent decades by both natural and anthropogenic factors. This is mainly attributed to climate change, sea level rise, and the adversities of rapid economic developments. The present study aims to identify critical areas by investigating the causative factors, such as geological, marine, and anthropogenic factors, that have led to the degradation of this geomorphological marvel. Based on the comprehensive study, such as cross-profile analysis, groundwater table mapping, shoreline change analysis using DSAS, sediment transport characterization, and wave modeling, it is revealed that wave-induced toe erosion, groundwater seepage through the friable sandstones of the formation, other physical, chemical, and biological interactions as well as human interferences are the main drivers behind the degradation. The vulnerable locations are under high development pressure, which needs to be regulated at any cost. A set of multi-faceted recommendations combining ‘grey’, ‘green’, and ‘hybrid’ measures is proposed herein to protect and preserve the Varkala cliff and its frontal beaches. Strict adherence to the implementation of the Integrated Coastal Zone Management (ICZM) plan to control developmental activities, continuous monitoring of the cliff coast for taking timely remedial measures, application of appropriate shore protection techniques, hybrid measures for the protection of the cliff face, etc., is suggested for immediate consideration.

印度西南海岸的瓦尔卡拉悬崖，拥有广阔的正面海滩，是印度第27个国家地质纪念碑，人们正在努力使这个独特的地质奇迹被认可为地质公园。然而，近几十年来，该悬崖的存在受到了自然和人为因素的威胁，该悬崖属于中新-上新世沃卡利组。这主要归因于气候变化、海平面上升和经济快速发展的不利因素。本研究旨在通过调查导致这一地貌奇观退化的原因，如地质、海洋和人为因素，来确定关键区域。通过横断面分析、地下水位制图、DSAS法岸线变化分析、沉积物输运特征和波浪模拟等综合研究，揭示了波浪引起的趾部侵蚀、地下水通过地层脆性砂岩渗漏、其他物理、化学和生物相互作用以及人为干扰是退化的主要驱动因素。脆弱地区面临着巨大的发展压力，需要不惜一切代价加以调控。本文提出了一套多方面的建议，结合“灰色”、“绿色”和“混合”措施，以保护和保存瓦尔卡拉悬崖及其正面海滩。建议立即考虑的事项包括：严格执行海岸地带综合管理计划，以控制发展活动；持续监察崖岸，以便及时采取补救措施；采用适当的护岸技术；采取混合措施，以保护崖面等。

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引用次数: 0

Quantifying coastal blue carbon through primary production in a subtropical bay 通过亚热带海湾初级生产量化海岸蓝碳

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-22 DOI: 10.1016/j.ecss.2025.109673

Lan-Feng Fan , Jui-Sheng Chang , Wen-Chen Chou , Liang-Yu Chen , Tzong-Yueh Chen

Coastal ecosystems play a disproportionate role in global carbon sequestration, yet conventional assessments often underestimate contributions from phytoplankton and benthic macroalgae. In this study, we quantified the carbon sequestration capacity of Maoao Bay, a subtropical embayment in the northwestern Pacific, by partitioning fluxes into phytoplankton-mediated biological carbon pump (phyto-BCP), phytoplankton-associated microbial carbon pump (phyto-MCP), and benthic macroalgal export production (benthic EP). Year-round sampling revealed strong seasonality in both pelagic and benthic primary production: phytoplankton production peaked during winter under enhanced nutrient availability, whereas subtidal macroalgal production was highest in summer under elevated light conditions. Total carbon sequestration averaged 88.3 kgC d⁻¹ (1.62 tCO₂e ha⁻¹ yr⁻¹), with phyto-BCP contributing the largest annual fraction (68.3 %), followed by benthic EP (17.5 %) and phyto-MCP (14.2 %). Despite occupying only ∼12 % of the bay, macroalgal habitats exhibited higher per-area carbon removal efficiency than phytoplankton, highlighting their disproportionate role in coastal carbon sequestration. These findings underscore the ecological complementarity of pelagic and benthic primary producers and suggest that targeted restoration or expansion of macroalgal beds could significantly enhance nearshore blue carbon pathways, supporting regional climate mitigation strategies and broader sustainability objectives.

沿海生态系统在全球碳固存中发挥着不成比例的作用，然而传统的评估往往低估了浮游植物和底栖大型藻类的贡献。本研究通过将碳通量划分为浮游植物介导的生物碳泵（phyto-BCP）、浮游植物相关的微生物碳泵（phyto-MCP）和底栖大藻输出产量（benthic macroalgal export production, benthic EP），量化了西北太平洋亚热带海湾茂澳湾的固碳能力。全年取样显示，浮游生物和底栖生物初级生产具有强烈的季节性：在养分有效性增强的条件下，浮游植物的产量在冬季达到峰值，而在光照增强的条件下，潮下大型藻类的产量在夏季达到最高。总固碳量平均为88.3 kgC d−1 (1.62 tCO2e ha−1 yr−1)，其中植物- bcp贡献最大的年组分（68.3%），其次是底栖植物EP（17.5%）和植物- mcp（14.2%）。尽管大型藻类栖息地只占海湾面积的12%，但它们的单位面积碳去除效率高于浮游植物，这凸显了它们在沿海碳固存中不成比例的作用。这些发现强调了中上层和底栖初级生产者的生态互补性，并表明有针对性地恢复或扩大大型藻床可以显著增强近岸蓝碳途径，支持区域气候减缓战略和更广泛的可持续性目标。

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引用次数: 0

Assessing trait-based approach to long-term monitoring of soft-bottom macrobenthic assemblages in a polluted estuary 基于特征评价的河口污染软底大型底栖生物群落长期监测方法

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-21 DOI: 10.1016/j.ecss.2025.109680

J. Emilio Sánchez-Moyano , Emilio M. García-Adiego , Francisco J. Estacio , Isabel García-Asencio

The use of biological traits analysis and functional diversity has emerged as a valuable tool for assessing anthropogenic impacts or disturbances on coastal communities. In this study, we applied this approach to evaluate the long-term variation in soft-bottom macrobenthic assemblages from 1998 to 2016 in the highly urbanized and industrialized Odiel-Tinto estuary. The assemblages were structured along the natural gradient from the estuary to the marine environment, although anthropogenic pressures, such as dredging and heavy metal contamination, played a decisive role in shaping functional composition. Functional indices, such as functional richness and Rao's Q, proved to be more sensitive indicators of environmental changes than traditional taxonomic indices. In the inner zones, species richness and functional diversity were significantly lower, with communities dominated by small-sized opportunistic species typical of unstable environments. In contrast, the outer marine zones supported a more diverse range of feeding modes and functional traits. Traits related to body size, larval or egg development, feeding modes, and AMBI categories exhibited clear responses to environmental stressors, providing valuable insights into the resilience and recovery potential of macrobenthic communities. This study enhances our understanding of estuarine ecosystem responses to anthropogenic pressures and offers essential data for global estuarine conservation efforts, contributing to the formulation of management strategies applicable to similar environments worldwide.

利用生物性状分析和功能多样性已成为评估人为影响或干扰沿海群落的一种有价值的工具。在本研究中，我们应用该方法评估了1998 - 2016年高度城市化和工业化的Odiel-Tinto河口软底大型底栖生物群落的长期变化。尽管疏浚和重金属污染等人为压力在功能组成的形成中起了决定性作用，但这些组合是沿着河口到海洋环境的自然梯度构造的。功能丰富度和Rao’s Q等功能指标比传统的分类学指标更能反映环境变化。内带物种丰富度和功能多样性均较低，以小型机会主义物种为主，属于典型的不稳定环境。相比之下，外海区支持更多样化的摄食方式和功能特征。与体型、幼虫或卵发育、摄食方式和AMBI类别相关的性状对环境应激因子表现出明显的响应，为了解大型底栖生物群落的恢复能力和恢复潜力提供了有价值的见解。本研究提高了我们对河口生态系统对人为压力的响应的认识，为全球河口保护工作提供了必要的数据，有助于制定适用于全球类似环境的管理策略。

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引用次数: 0

From pixels to peaks: integrating LiDAR and RGB drone imagery to map mussel spat on intertidal rocky shores 从像素到峰值：整合激光雷达和RGB无人机图像来绘制潮间带岩石海岸上的贻贝

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-21 DOI: 10.1016/j.ecss.2025.109671

Marta Román , Bede F.R. Davies , Philippe Rosa , Simon Oiry , Pierre Gernez , José A. Santiago , Celia Olabarria , Laurent Barillé

Remote monitoring of the spatial cover of sessile intertidal species can provide important information for the conservation and management of commercial species. However, the use of high-resolution RGB imagery combined with topographic data acquired by Unmanned Aerial Vehicles (UAVs) to map rocky intertidal sessile invertebrates, particularly wild spat of Mytilus galloprovincialis, remains largely unexplored. Galicia (northwestern Spain) is the leading producer of farmed mussels in Europe, and most of mussel rafts are seeded with wild spat collected from intertidal rocks. Using a UAV equipped with an RGB camera and LiDAR sensor, we surveyed a rocky intertidal area in Galicia where mussel spat are harvested. Adult mussels and spat, the goose barnacle Pollicipes pollicipes, other barnacles, and red, brown and green macroalgae were classified using a model stack composed of random forest, gradient tree boosting, support vector machine and k-nearest neighbours. Predictors included the RGB, digital surface model (DSM) and topographic indicators (e.g. orientation, slope, topographic position index, topographic ruggedness index) from a raster composite with a pixel size of 10 mm. Model comparison revealed that gradient tree boosting performed best, with an overall accuracy of 0.84, a kappa value of 0.82 and user accuracies of 0.92 for adult mussels, 0.81 for mussel spat and 0.96, 0.92 and 0.87 for red, brown and green macroalgae, respectively. The prediction map revealed the spatial distribution of mussel spat expressed as percentage cover in 15 cm × 15 cm cells. Twenty percent of the cells in which mussel spat were present exhibited ≥50 % cover, which is lower than the values reported from in situ surveys in the region. Elevation (derived from the DSM) and the RGB channels were the most important features for model-based discrimination of the classes. Our findings demonstrate the usefulness of elevation data for remote detection of intertidal populations, highlighting the potential value of UAV surveys for managing small-scale fisheries.

潮间带固结物种空间覆盖的遥感监测可为商业物种的保护和管理提供重要信息。然而，使用高分辨率RGB图像结合无人机（uav）获取的地形数据来绘制潮间带岩石无底无脊椎动物，特别是Mytilus galloprovincialis的野生贝，在很大程度上仍未被探索。加利西亚（西班牙西北部）是欧洲养殖贻贝的主要产地，大多数贻贝筏都用从潮间带岩石中收集的野生贝籽播种。使用配备RGB相机和激光雷达传感器的无人机，我们调查了加利西亚一个收获贻贝贝的岩石潮间带。采用随机森林、梯度树增强、支持向量机和k近邻组成的模型栈对成年贻贝和贝类、鹅藤壶、其他藤壶以及红、棕、绿大型藻类进行分类。预测因子包括RGB、数字表面模型（DSM）和地形指标（例如方向、坡度、地形位置指数、地形坚固度指数），这些指标来自像素尺寸为10毫米的栅格复合材料。模型比较表明，梯度树增强效果最好，成年贻贝的总体精度为0.84，kappa值为0.82，用户精度分别为0.92、0.81、0.96、0.92和0.87。预测图显示了贻贝贝在15 cm × 15 cm细胞中以百分数表示的空间分布。有贝口存在的细胞中，有20%的细胞覆盖度≥50%，这低于该地区实地调查报告的值。高程（来自DSM）和RGB通道是基于模型的分类最重要的特征。我们的研究结果证明了海拔高度数据对潮间带种群的远程检测的有用性，突出了无人机调查在管理小规模渔业方面的潜在价值。

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引用次数: 0

Phytoplankton primary production in the shelf waters near the Kamchatka Peninsula 堪察加半岛附近陆架水域浮游植物的初级生产

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-20 DOI: 10.1016/j.ecss.2025.109675

Tatiana Efimova , Tanya Churilova , Anatoly Buchelnikov , Nataliia Moiseeva , Elena Skorokhod , Pavel Salyuk

This study is aimed to analyze variability in primary production (PP) measured with full spectral method and to assess effect of the environment factors on both phytoplankton absorption and quantum yield as production variability drivers in the shelf waters of the Kamchatka Peninsula in August–September 2023. The PP varied highly due to change of chlorophyll-a concentration (Chl-a) and Chl-a specific photosynthesis rate (

P^{B}

). The

P^{B}

was associated mainly with light-induced variation in quantum yield (

ϕ

). Intensity and spectral features of light influence significantly wavelength-weighted Chl-a specific absorption coefficient by phytoplankton pigments, whereas they have little effect on this coefficient for photosynthetic pigments and, therefore, little effect on

P^{B}

. High surface insolation led to an appearance of subsurface

P^{B}

maximum caused by the

ϕ

photoinhibition. The surface PP and Chl-a decreased within an order of magnitude from shallow coastal waters to off-shore. The highest Chl-a and PP was measured in the Avacha bay due to nutrient supply with river run off. The surface PP vs. Chl-a relationship was revealed. It can be applied for the operational PP assessment in the shelf waters near the Kamchatka Peninsula in summer based on in situ or remote sensing Chl-a data.

本研究旨在分析全光谱方法测量的初级产量（PP）的变异，并评估环境因子对堪察加半岛大陆架水域浮游植物吸收和量子产量的影响，作为生产变异的驱动因素。叶绿素a浓度（Chl-a）和叶绿素a比光合速率（PB）的变化使PP变化很大。PB主要与光诱导的量子产率（φ）变化有关。光的强度和光谱特征对浮游植物色素波长加权的Chl-a比吸收系数有显著影响，而对光合色素的波长加权Chl-a比吸收系数影响不大，因此对PB的影响不大。高地表日照导致地表下PB最大值的出现，这是由φ光抑制引起的。表层PP和Chl-a由浅海向近海呈数量级递减。阿瓦查湾的Chl-a和PP含量最高，主要是由于河流径流的养分供给。揭示了表面PP与Chl-a的关系。它可以应用于堪察加半岛附近大陆架水域夏季基于原位或遥感Chl-a数据的实际PP评估。

{"title":"Phytoplankton primary production in the shelf waters near the Kamchatka Peninsula","authors":"Tatiana Efimova , Tanya Churilova , Anatoly Buchelnikov , Nataliia Moiseeva , Elena Skorokhod , Pavel Salyuk","doi":"10.1016/j.ecss.2025.109675","DOIUrl":"10.1016/j.ecss.2025.109675","url":null,"abstract":"<div><div>This study is aimed to analyze variability in primary production (PP) measured with full spectral method and to assess effect of the environment factors on both phytoplankton absorption and quantum yield as production variability drivers in the shelf waters of the Kamchatka Peninsula in August–September 2023. The PP varied highly due to change of chlorophyll-<em>a</em> concentration (Chl-<em>a</em>) and Chl-<em>a</em> specific photosynthesis rate (<span><math><msup><mrow><mi>P</mi></mrow><mrow><mi>B</mi></mrow></msup></math></span>). The <span><math><msup><mrow><mi>P</mi></mrow><mrow><mi>B</mi></mrow></msup></math></span> was associated mainly with light-induced variation in quantum yield (<span><math><mi>ϕ</mi></math></span>). Intensity and spectral features of light influence significantly wavelength-weighted Chl-<em>a</em> specific absorption coefficient by phytoplankton pigments, whereas they have little effect on this coefficient for photosynthetic pigments and, therefore, little effect on <span><math><msup><mrow><mi>P</mi></mrow><mrow><mi>B</mi></mrow></msup></math></span>. High surface insolation led to an appearance of subsurface <span><math><msup><mrow><mi>P</mi></mrow><mrow><mi>B</mi></mrow></msup></math></span> maximum caused by the <span><math><mi>ϕ</mi></math></span> photoinhibition. The surface PP and Chl-<em>a</em> decreased within an order of magnitude from shallow coastal waters to off-shore. The highest Chl-<em>a</em> and PP was measured in the Avacha bay due to nutrient supply with river run off. The surface PP <em>vs.</em> Chl-<em>a</em> relationship was revealed. It can be applied for the operational PP assessment in the shelf waters near the Kamchatka Peninsula in summer based on in situ or remote sensing Chl-<em>a</em> data.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"329 ","pages":"Article 109675"},"PeriodicalIF":2.6,"publicationDate":"2025-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatiotemporal variability in the biochemical characteristics of phytoplankton and zooplankton in the coastal waters of the Yellow and East seas 黄海和东海近岸水域浮游植物和浮游动物生化特征的时空变异

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-20 DOI: 10.1016/j.ecss.2025.109681

Da Won Goh , Min Ho Seo , Young Seok Jeong , Jun Sik Woo , Sanghoon Park , JaeSoon Kim , Myung Joon Kim , Yoon Ji Lee , Ye Hwi Kim , Ha Young Choi , Hye Min Choi , Sang Heon Lee

The coastal waters are dynamic ecosystems influenced by seasonal temperature fluctuations, riverine inputs, and upwelling, which drive sensitive responses among lower trophic-level organisms. The biochemical composition of phytoplankton and zooplankton plays a critical role in determining energy flow and food web structure, yet their spatiotemporal variability remains underexplored. This study investigated spatiotemporal variability in the biochemical composition of phytoplankton and zooplankton in the Yellow Sea (YS) and East Sea (ES), focusing on environmental and biological drivers. Field surveys were conducted in spring (May) and summer (August) of 2023 (YS) and 2024 (ES), quantifying phytoplankton macromolecular composition—carbohydrates (CHO), proteins (PRT), and lipids (LIP)—and zooplankton proximate composition (PRT, LIP, and ash), and various environmental parameters. In the YS, phytoplankton LIP content was negatively correlated with nutrient concentrations, suggesting nutrient-driven biochemical shifts. In the ES, phytoplankton exhibited significant seasonal changes, with PRT decreasing and CHO increasing, reflecting metabolic adaptation to temperature stress and nutrient limitation. Zooplankton biochemical composition reflected these regional contrasts: in the YS, variability was largely influenced by community structure, while in the ES, it was more strongly regulated by phytoplankton nutritional quality. Under nutrient-limited conditions, diatom growth slows and cell wall synthesis may increase frustule thickness. These changes could reduce food palatability, which may help explain the observed pattern in the ES, including decreased zooplankton PRT content and increased LIP storage. A positive correlation in PRT content between phytoplankton and zooplankton in the ES indicated a stronger biochemical trophic linkage under stable copepod dominance, whereas weakened coupling in the YS reflected grazer diversity and variable feeding selectivity. These findings highlight how environmental conditions and community composition regulate biochemical properties and trophic connectivity in Korean coastal marine ecosystems.

沿海水域是受季节温度波动、河流输入和上升流影响的动态生态系统，这驱动了低营养水平生物的敏感反应。浮游植物和浮游动物的生物化学组成在能量流和食物网结构中起着至关重要的作用，但它们的时空变异性尚未得到充分的研究。研究了黄海（YS）和东海（ES）浮游植物和浮游动物生化组成的时空变异，重点分析了环境和生物驱动因素。在2023年春季（5月）和2024年夏季（8月）分别进行了野外调查，定量测定了浮游植物的大分子组成——碳水化合物（CHO）、蛋白质（PRT）和脂质（LIP），以及浮游动物的近似组成（PRT、LIP和灰分）和各种环境参数。在YS中，浮游植物的LIP含量与营养物浓度呈负相关，提示营养物驱动的生化转变。在ES中，浮游植物表现出明显的季节变化，PRT减少，CHO增加，反映了对温度胁迫和营养限制的代谢适应。浮游动物生物化学组成反映了这些区域差异：在近海，变异主要受群落结构的影响，而在近海，受浮游植物营养品质的调节更为强烈。在营养受限的条件下，硅藻生长减慢，细胞壁合成可能增加囊壁厚度。这些变化可能会降低食物的适口性，这可能有助于解释在ES中观察到的模式，包括浮游动物PRT含量降低和LIP储存增加。浮游植物与浮游动物PRT含量呈正相关，表明桡足动物优势稳定下浮游植物与浮游动物之间存在较强的生化营养连锁，而桡足动物优势稳定下浮游植物与浮游动物之间的耦合较弱，反映了食草动物多样性和摄食选择性的变化。这些发现强调了环境条件和群落组成如何调节韩国沿海海洋生态系统的生化特性和营养连通性。

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引用次数: 0

An invader chronicles: local ecological niche of Mnemiopsis leidyi in the Venice Lagoon 入侵者编年史：威尼斯泻湖中雷氏记忆藻的生态位

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-20 DOI: 10.1016/j.ecss.2025.109678

F. Piccardi , S. Girardello , S.M. Bussard , V. Tirelli , D. Borme , A. Barausse , C. Mazzoldi

The invasive ctenophore Mnemiopsis leidyi poses ecological threats in invaded coastal ecosystems such as the Venice Lagoon due to its high fecundity and adaptability to various climates. Although its dynamics have been studied in other regions, information from Mediterranean lagoons, which are characterized by strong spatial and seasonal variability in environmental conditions, remains limited. This study provides the first integrated field and laboratory investigation of the species’ ecological niche in the Venice Lagoon, combining two years of spatial distribution monitoring with controlled experiments to define key environmental thresholds for its survival. Our results shows that the species displays a seasonal pattern, blooming in late spring and late summer-early autumn, likely related to warmer temperatures and optimal salinity; indeed, its abundance positively correlated with water temperature and salinity. The controlled laboratory results integrated field observations by showing that M. leidyi can survive across a wide range of temperatures (10–32 °C) and salinities (10–34), but the extreme conditions of this range, such as very high temperatures (32 °C) or low salinity (10), markedly reduced its survival. By integrating in situ observations with experimentally estimated thresholds, this study provides novel insights into the ecological niche of M. leidyi in a Mediterranean lagoon. The results suggest that ongoing climate change may shift the lagoon towards more favorable conditions for this species, potentially intensifying bloom events and their cascading ecological impacts. These findings highlight the need for targeted monitoring and adaptive management to mitigate the ecological and socio-economic consequences of M. leidyi expansion.

入侵的栉水母因繁殖力强、对气候的适应性强，对威尼斯潟湖等被入侵的沿海生态系统构成了生态威胁。虽然在其他区域对其动态进行了研究，但地中海泻湖的信息仍然有限，其特点是环境条件的空间和季节变化很大。本研究首次对威尼斯潟湖的物种生态位进行了综合实地和实验室调查，将两年的空间分布监测与对照实验相结合，以确定其生存的关键环境阈值。我们的研究结果表明，该物种具有季节性模式，在春末和夏末-秋初开花，可能与较高的温度和最佳盐度有关；事实上，其丰度与水温和盐度呈正相关。受控的实验室结果综合了现场观察结果，表明M. leidyi可以在很宽的温度（10 - 32℃）和盐度（10 - 34）范围内生存，但该范围的极端条件，如极高的温度（32℃）或低盐度（10），显著降低了其存活率。通过将现场观测与实验估计的阈值相结合，本研究为地中海泻湖M. leidyi的生态位提供了新的见解。结果表明，持续的气候变化可能会使泻湖向更有利于这种物种的环境转变，潜在地加剧水华事件及其连锁生态影响。这些发现强调了有针对性的监测和适应性管理的必要性，以减轻M. leidyi扩张的生态和社会经济后果。

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引用次数: 0

Seasonal variations of the physiological indices of the Mediterranean scallop Pecten jacobaeus L. from the Krka River estuary (Adriatic Sea) 库尔卡河河口地中海扇贝生理指标的季节变化

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-16 DOI: 10.1016/j.ecss.2025.109669

Valentina Šebalj , Petar Zuanović , Tomislav Šarić , Ivan Župan

Scallops are commercially important bivalves that are under constant fishing pressure, which along with changing environmental conditions, can negatively impact their populations. Scallop aquaculture can help mitigate these adverse effects. From December 2021 to May 2023, 300 specimens of Pecten jacobaeus (Linnaeus, 1758) were collected from the Krka River estuary to assess their physiological indices in relation to changing environmental conditions. We calculated moisture content (MC), condition (CI), gonadosomatic (GSI) and muscle (MI) indices, and meat yield (MY), seasonally. The soft tissue MC averaged around 82 % and varied seasonally, with differences noted between various soft tissue parts. The GSI results indicate that P. jacobaeus experiences three potential spawning peaks annually: a major one in late winter/early spring, and weaker ones in early fall, and a posibble in early winter. The sea temperature emerged as the most significant environmental factor influencing the reproductive cycle of P. jacobaeus, showing a negative correlation with GSI. In contrast, river inflow positively correlated with GSI, suggesting that food availability plays a crucial role in supporting gonadal development. Additionally, an extreme decline in salinity can have detrimental effects on reproduction. A significant negative correlation between GSI and MI, implies that energy allocation is divided between muscle and gonads, indicating that muscle reserves are utilized for gonad development. According to the results of the GSI analyses, we can suggest that spring is the optimal season for collecting wild spat or broodstock for aquaculture development, while summer is the best time for harvesting natural populations when the muscle reaches its maximum size.

扇贝是一种具有重要商业价值的双壳类动物，不断受到捕捞压力，再加上环境条件的变化，会对其种群产生负面影响。扇贝养殖可以帮助减轻这些不利影响。于2021年12月至2023年5月，在克尔卡河河口采集了300只雅各布斯（Linnaeus, 1758）标本，评估了其生理指标与环境条件变化的关系。我们按季节计算了水分含量（MC）、状态（CI）、促性腺（GSI）和肌肉（MI）指数以及肉产量（MY）。软组织MC平均约为82%，随季节变化，不同软组织部位之间存在差异。GSI结果表明，黄颡鱼每年有三个潜在的产卵高峰，即冬末/早春产卵高峰较多，初秋产卵高峰较弱，初冬产卵高峰可能较多。海水温度是影响雅可比假单胞虫繁殖周期最显著的环境因子，与GSI呈负相关。相比之下，河流流入与GSI呈正相关，表明食物供应在支持性腺发育中起着至关重要的作用。此外，盐度的急剧下降会对生殖产生不利影响。GSI和MI之间的显著负相关表明能量分配在肌肉和性腺之间分配，表明肌肉储备被用于性腺发育。根据GSI分析结果，我们可以认为春季是采集野生贝或亲鱼进行水产养殖发展的最佳季节，而夏季是收获自然种群的最佳时间，此时肌肉达到最大尺寸。

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引用次数: 0

Wind-driven variability in phytoplankton dynamics in a semi-enclosed sea 半封闭海域中浮游植物动态的风驱动变异性

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-16 DOI: 10.1016/j.ecss.2025.109667

Ruohan Sun , Xinyi Kang , Zhen Wang , Haibo Zhang , Hang Yin

Wind forcing plays a crucial role in regulating nutrient and phytoplankton dynamics in semi-enclosed seas. This study investigated the effects of typical wind forcing with two directions, southwesterly and northeasterly, and a range of wind intensities on the spatial distribution of dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), and phytoplankton biomass in the Bohai Sea using a coupled hydrodynamic-biogeochemical model (FVCOM-ICM). Our results showed that under northeasterly winds, DIN and DIP concentrations generally decreased, particularly in the Laizhou and Bohai Bays, due to wind-driven circulation that enhanced nutrient export, promoted intrusion of low-nutrient offshore waters, or strengthened downwelling. In contrast, southwesterly winds transported nutrient-rich waters from nearshore and riverine sources toward the northeastern Bohai Bay, northeastern Liaodong Bay, and southern Laizhou Bay, increasing nutrient availability and phytoplankton biomass, further supported by vertical upwelling. Despite contrasting nutrient responses, phytoplankton biomass increased under both wind directions in the central and southern Liaodong Bay, mainly because weaker current intensification, deeper and clearer waters, and moderate mixing improved near-surface light conditions and alleviated light limitation. Overall, the three sub-bays exhibited distinct ecological responses, highlighting that wind forcing did not exert uniform effects across the Bohai Sea but depended on local circulation features and the interplay between nutrient supply and light availability.

在半封闭海域，风强迫在调节养分和浮游植物动态方面起着至关重要的作用。采用水动力-生物地球化学耦合模型（FVCOM-ICM），研究了西南和东北两种典型风向和风强范围对渤海溶解无机氮（DIN）、溶解无机磷（DIP）和浮游植物生物量空间分布的影响。结果表明，在东北风作用下，大气中DIN和DIP浓度普遍下降，特别是在莱州湾和渤海湾，这主要是由于风驱动环流增强了养分输出，促进了低养分近海海域的入侵，或加强了下沉。与此相反，西南风将近岸和河源的富营养水输送到渤海湾东北部、辽东湾东北部和莱州湾南部，增加了养分有效性和浮游植物生物量，并进一步得到垂直上升流的支持。尽管养分响应存在差异，但在辽东湾中部和南部两个风向下，浮游植物生物量均有所增加，主要原因是洋流强度较弱、海水更深更清澈、适度混合改善了近表层光照条件，减轻了光照限制。总体而言，三个子湾表现出不同的生态响应，表明风对整个渤海的影响并不均匀，而是取决于局地环流特征以及养分供应和光有效性之间的相互作用。

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引用次数: 0

Bivariate extreme analysis for coastal flooding in the Adriatic Sea 亚得里亚海沿岸洪水的二元极端分析

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

Estuarine Coastal and Shelf Science

Pub Date : 2025-12-16 DOI: 10.1016/j.ecss.2025.109668

Sara Corvaro, Francesco Marini, Stefania Rocchi, Carlo Lorenzoni

This study investigates the interaction between storm surge and wave height in the Adriatic Sea, focusing on their combined joint influence on coastal flooding risk under different climate scenarios and return periods. Using bivariate statistical analysis based on measured data (water levels) and hindcast data (significant wave heights), the research quantifies the joint probabilities of extreme storm events and highlights the contribution of waves (wave set-up) in amplifying extreme sea levels (ESLs) in the coastal area. In particular, the study aims to assess extreme sea levels in the Adriatic Sea by providing ESLs maps for different return periods and two IPPC climate change scenarios (SSP1-1.9 and SSP5-8.5). Maximum ESLs are observed in the northern Adriatic, with Venice identified as a hotspot. Wave contributions are shown to substantially double water levels, particularly in the areas between Ancona and Zadar and near the southern entrance at Otranto, emphasizing the need for a bivariate approach to accurately capture these interactions. The projected sea level rise further exacerbates the risks posed by storm events, particularly for vulnerable coastal areas. The present study underscores the need for a more comprehensive understanding of the combined joint effects of storm surge and waves, and enable more effective coastal flooding risk assessments along the Adriatic coast due to extreme sea levels by providing valuable support for designing mitigation measures to address climate-driven extreme events.

本文研究了亚得里亚海风暴潮与浪高的相互作用，重点研究了它们在不同气候情景和回归期下对沿海洪水风险的联合影响。利用基于实测数据（水位）和后播数据（有效浪高）的双变量统计分析，该研究量化了极端风暴事件的联合概率，并强调了波浪（波浪设置）在放大沿海地区极端海平面（ESLs）方面的贡献。通过提供不同回归期和两种IPPC气候变化情景（SSP1-1.9和SSP5-8.5）的ESLs图，对亚得里亚海极端海平面进行了评估。在亚得里亚海北部观测到最大的esl，威尼斯被确定为热点。波浪的作用表明，水位基本上翻了一番，特别是在安科纳和扎达尔之间以及奥特朗托南部入口附近的地区，强调需要一种二元方法来准确捕捉这些相互作用。预计的海平面上升进一步加剧了风暴事件带来的风险，特别是对脆弱的沿海地区。本研究强调需要更全面地了解风暴潮和海浪的综合联合影响，并通过为设计缓解措施以应对气候驱动的极端事件提供宝贵支持，从而更有效地评估亚得里亚海沿岸因极端海平面造成的沿海洪水风险。

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引用次数: 0