Ocean & Coastal Management最新文献_第7页

Assessing fish diversity and community keystone species in urbanized estuarine-coastal areas using eDNA metabarcoding and network analysis: A coastal management perspective 基于eDNA元条形码和网络分析的城市化河口-沿海地区鱼类多样性和群落关键物种评估：沿海管理视角

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-29 DOI: 10.1016/j.ocecoaman.2025.108021

Linus S.H. Lo, Peiyuan Ye, Jingyu Liu, Jinping Cheng

Monitoring critical marine resources through non-invasive methods is essential for effective coastal management. Fish communities are vital components of coastal ecosystems, yet their biodiversity and assemblage structure face increasing threats from urbanization and intensified fishing pressure. This study utilized eDNA metabarcoding to assess territory-wide fish diversity, community composition, and environmental correlates across 16 sites in Hong Kong's highly urbanized estuarine-coastal waters. Our eDNA metabarcoding-based analysis identified 76 fish species, including commercially important and threatened taxa. Notably, fish diversity hotspots with high alpha diversity were found in the turbid western and central waters. Substantial overlap in species composition was observed between the western and central waters, as well as in the transition zones connecting these areas to the southern region. eDNA metabarcoding surveys exhibited distinct advantages in detecting fish species that are typically missed or underrepresented in convetional net-based trawl surveys, as reflected by the increased detection of small-sized, schooling, and elusive low-trophic-level fish taxa—particularly from Clupeiformes and Mugiliformes—in the current study. Environmental gradients, specifically salinity, total phosphorus, and chlorophyll a, had significant impacts on fish community dissimilarity. Co-occurrence network analysis identified putative keystone fish species, such as Sardinella melanura and Nibea coibor, underscoring their central roles in ecosystem stability. This study highlights the value of eDNA metabarcoding-based surveys for enhanced assessments of fish diversity, including rare and elusive low-trophic-level species, across complex estuarine gradients in urban coastal environments, thereby supporting effective coastal resource management.

通过非侵入性方法监测重要海洋资源对于有效的沿海管理至关重要。鱼类群落是沿海生态系统的重要组成部分，但其生物多样性和组合结构面临着城市化和捕捞压力加剧的日益严重的威胁。本研究利用eDNA元条形码对香港高度城市化的河口沿岸水域16个地点的鱼类多样性、群落组成和环境相关性进行了评估。我们基于eDNA元条形码的分析鉴定了76种鱼类，包括商业上重要的和受威胁的分类群。值得注意的是，在浑浊的西部和中部水域发现了高α多样性的鱼类多样性热点。在西部和中部水域之间以及连接这些地区与南部地区的过渡区，观察到物种组成的大量重叠。eDNA元条形码调查在检测传统的基于网的拖网调查中通常遗漏或代表性不足的鱼类物种方面显示出明显的优势，这反映在当前研究中对小型、群居和难以捉摸的低营养水平鱼类分类（特别是来自Clupeiformes和mugiliformes）的检测增加。环境梯度，特别是盐度、总磷和叶绿素a对鱼类群落差异有显著影响。共现网络分析确定了假定的关键鱼类，如黑沙丁鱼（Sardinella melanura）和Nibea coibor，强调了它们在生态系统稳定中的核心作用。本研究强调了基于eDNA元条形码的调查在增强城市沿海环境中复杂河口梯度鱼类多样性评估方面的价值，包括稀有和难以捉摸的低营养水平物种，从而支持有效的沿海资源管理。

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引用次数: 0

Ecological and economic perspectives of two decades of change in a traditional fishing ground in the Philippines 菲律宾传统渔场二十年变化的生态和经济视角

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-28 DOI: 10.1016/j.ocecoaman.2025.108027

Regina Therese M. Bacalso , Matthias Wolff , Giovanni Romagnoni , Marie Fujitani

A time-dynamic ecosystem model of the Visayan Sea, a significant traditional fishing area in the Philippines, was employed to calculate a set of ecological indicators from 1997 to 2018. These indicators were used to analyze the biomass, vital rates, community structure, biodiversity, development, and functioning of the Visayan Sea ecosystem. Attributes of system resilience and the ecosystem effects of fishing form the core of the analysis, providing insights into how structural and functional changes have shaped the ecosystem over time. In addition, monetary values of the trends in fisheries landings and catch composition were estimated to document the direct economic consequence of these changes. Results show that the biomass of predator and upper trophic level fishes declined, while small pelagic fishes, herbivores, and benthic invertebrates increased. Most exploited groups exhibited high fishing mortality, and the biodiversity index fell to nearly half its baseline. These trends suggest a development trajectory toward dominance by lower trophic level species, driven by impaired top-down control and increased bottom-up production. Despite structural simplification, the ecosystem remained stable between 1997 and 2018, supported by high detrital cycling and functional redundancy. The detrital pathways were sustained by underutilized low trophic level group biomass following predator decline, while, high species richness within functional groups conferred resilience against external stressors. However, sustained high fishing pressure increasingly threatens these groups. Decreasing catches of high-value large fishes were offset by increasing contributions from smaller fishes and benthic invertebrates, resulting in increased total landings and value over time. However, the average per capita income from fishing declined throughout the period, falling below the national poverty threshold in 2018. Overall, the use of a suite of indicators was useful in evaluating the status of the Visayan Sea between two decades from both ecological and economic perspectives. The combined application of these indicators to re-evaluate existing fisheries policies and their effects with respect to diverse management objectives is further discussed.

以菲律宾重要的传统渔区维萨扬海为研究对象，采用时间动态生态系统模型计算了1997 - 2018年的生态指标。利用这些指标分析了维萨扬海生态系统的生物量、生命率、群落结构、生物多样性、发展和功能。系统恢复力的属性和捕鱼对生态系统的影响构成了分析的核心，提供了对结构和功能变化如何随着时间的推移塑造生态系统的见解。此外，估计了渔业登陆量和渔获量组成趋势的货币价值，以记录这些变化的直接经济后果。结果表明：捕食鱼类和上营养层鱼类生物量下降，小型远洋鱼类、食草动物和底栖无脊椎动物生物量增加；大多数被开发群体表现出较高的捕捞死亡率，生物多样性指数下降到基线的近一半。这些趋势表明，在自上而下的控制受损和自下而上的生产增加的驱动下，低营养级物种的优势发展轨迹。尽管结构简化，但生态系统在1997年至2018年期间保持稳定，这得益于高碎屑循环和功能冗余。在捕食者减少后，碎屑路径由未充分利用的低营养水平群体生物量维持，而功能群内的高物种丰富度赋予了抵御外部压力的能力。然而，持续的高捕捞压力日益威胁到这些群体。高价值大型鱼类渔获量的减少被小鱼和底栖无脊椎动物渔获量的增加所抵消，导致总渔获量和渔获价值随着时间的推移而增加。然而，在此期间，渔业的平均人均收入有所下降，2018年降至国家贫困线以下。总的来说，从生态和经济的角度来看，使用一套指标对评价米沙鄢海20年来的状况是有用的。进一步讨论了综合应用这些指标来重新评价现有渔业政策及其对各种管理目标的影响。

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引用次数: 0

Spatially explicit climate adaptation pathways for coastal archetypes: A quantitative narrative approach 沿海原型的空间显性气候适应路径：定量叙事方法

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-28 DOI: 10.1016/j.ocecoaman.2025.108022

Rick Kool , Martin Drews , Morten Andreas Dahl Larsen , Judy Lawrence

Worldwide, coastal communities are increasingly at risk due to ongoing and accelerating sea-level rise, and adaptation is urgently needed to mitigate the effects such as the declining performance of coastal infrastructure. This study explores the development of fully quantitative and spatially explicit adaptation pathways for different coastal archetypes, focusing on the impact of sea-level rise on a gravity-based urban drainage system. Introducing conceptual decision narratives, we quantify synergies and trade-offs within such a framework, revealing spatiotemporal dependencies and how they evolve over time.

Using the service decline trajectories for RCP4.5 and RCP8.5, we initially create a large ensemble of future pathways to explore adaptation timing, synergies, and trade-offs between service levels and economic losses. Our results show a strong dependence on the emission scenario, stressing the need for adaptive strategies and monitoring to track changes in risk. Nature-based storage and repurposing interventions were explored through different narratives, illustrating how these interventions can influence trade-offs between service levels, economic benefits, and timing. These trade-offs may not align spatially or temporally but can be managed through area-specific responses.

By evaluating spatially explicit pathways in each archetype, we identified complex adaptation options with long lead times, such as managed retreat, and pinpointed timing conflicts and dependencies tied to development choices. To maintain flexibility necessitates identification of the right time to implement certain actions based on evolving scenarios and past decisions to avoid lock-in effects. Visualizing decision points, based on coping levels, thresholds, and economic considerations, can help decision-makers identify conflicting timelines or prevent maladaptive actions that lead to costly outcomes in the future.

在世界范围内，由于海平面持续和加速上升，沿海社区面临的风险越来越大，迫切需要适应以减轻沿海基础设施性能下降等影响。本研究探讨了不同海岸原型的完全定量和空间明确的适应路径的发展，重点关注海平面上升对基于重力的城市排水系统的影响。引入概念性决策叙述，我们量化了这样一个框架内的协同效应和权衡，揭示了时空依赖性以及它们如何随着时间的推移而演变。利用RCP4.5和RCP8.5的服务下降轨迹，我们首先创建了一个大的未来路径集合，以探索适应时间、协同效应和服务水平与经济损失之间的权衡。我们的研究结果显示了对排放情景的强烈依赖，强调了适应性策略和监测跟踪风险变化的必要性。通过不同的叙述探讨了基于自然的存储和重新利用干预措施，说明了这些干预措施如何影响服务水平、经济效益和时间之间的权衡。这些权衡可能在空间或时间上不一致，但可以通过特定地区的应对措施加以管理。通过评估每个原型中的空间明确路径，我们确定了具有长交付时间的复杂适应选项，例如管理撤退，并确定了与开发选择相关的时间冲突和依赖关系。为了保持灵活性，必须根据不断变化的场景和过去的决策确定实施某些操作的正确时间，以避免锁定效应。基于应对水平、阈值和经济考虑的可视化决策点可以帮助决策者确定冲突的时间表或防止导致未来代价高昂的不适应行为。

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引用次数: 0

A chronosequence approach assessing carbon stock and fauna habitat potential of restored coastal wetlands in Southeast Queensland, Australia 澳大利亚昆士兰东南部沿海恢复湿地碳储量和动物栖息地潜力的时序分析

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-27 DOI: 10.1016/j.ocecoaman.2025.108026

Valerie Kwan, Robyn M.A. Davies, Vicki Bennion, Valerie Hagger, Catherine E. Lovelock

Restored coastal wetlands provide key ecosystem services such as climate regulation and habitat for biodiversity. Restoration site maturity is considered as a measure of ecological recovery that can be assessed from monitoring vegetation structure development over time. Carbon stock estimates can be refined from local measurements of root productivity and root mass at different site ages but such data are limited. Moreover, few studies simultaneously assess changes in carbon stocks and biodiversity restoration trajectories and compare these to remnant natural wetlands. Here, using a space-for-time approach, we developed recovery trajectories for vegetation structure, root production, carbon stocks, and insectivorous bat activity as an indicator of fauna habitat, for mangroves, saltmarshes, and supratidal forests in subtropical Southeast Queensland, Australia. Over the chronosequence, aboveground vegetation structure suggested that restored wetlands reach maturity in about 33 years for mangroves, 9 years for saltmarshes, 13 years for Melaleuca and 29 years for Casuarina supratidal forests. Root productivity showed no clear trend with site age for most ecosystems, indicating that carbon sequestration of belowground biomass was strongly influenced by site-specific factors rather than site age. Total ecosystem carbon stocks modelled for mature restored wetlands were within at least ∼76 % of reference values. Bat activity in mangroves increased over the chronosequence and was dominated by the closed foraging guild as stands approached maturity. Overall, restoration trajectories derived from a chronosequence approach can improve modelled estimates of carbon sequestration and biodiversity enhancement delivered by restored coastal wetlands, which in turn, can strengthen predictions on how coastal wetland restoration contributes to climate change mitigation and biodiversity loss reversal.

恢复后的滨海湿地为气候调节和生物多样性栖息地提供了重要的生态系统服务。恢复地成熟度被认为是生态恢复的一种度量，可以通过监测植被结构随时间的发展来评估。碳储量估算可以从不同立地年龄的根系生产力和根系质量的局部测量中得到改进，但这些数据是有限的。此外，很少有研究同时评估碳储量和生物多样性恢复轨迹的变化，并将其与剩余的自然湿地进行比较。本文以澳大利亚昆士兰东南部亚热带地区的红树林、盐沼和潮上森林为研究对象，利用空间-时间的方法，研究了植被结构、根系生产、碳储量和食虫蝙蝠活动的恢复轨迹，并以此作为动物栖息地的指标。从时间序列上看，红树林、盐沼、千层、木麻黄潮上林恢复湿地的成熟时间分别为33年、9年、13年和29年。大多数生态系统根系生产力随立地年龄的变化趋势不明显，表明地下生物量的碳固存受立地特定因子的影响较大，而非立地年龄。成熟恢复湿地模拟的生态系统总碳储量至少在参考值的76%以内。随着林分接近成熟期，蝙蝠活动随时间序列的增加而增加，并以封闭的觅食行会为主。总体而言，从时间序列方法得出的恢复轨迹可以改善沿海湿地恢复所带来的碳封存和生物多样性增强的模型估计，这反过来又可以加强对沿海湿地恢复如何促进气候变化缓解和生物多样性丧失逆转的预测。

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引用次数: 0

Multi-scale ecological zoning of Chinese coastal islands using a three-dimensional landscape framework 基于三维景观框架的中国沿海岛屿多尺度生态区划

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-26 DOI: 10.1016/j.ocecoaman.2025.108028

Guomin Zhang , Yuan Chi , Yubing Qu , Zhiwei Zhang , Xinyang Zhang , Zhenhang Liu , Yihui Guo , Lvyin Ouyang

As unique geographic units, islands face increasing anthropogenic pressures due to their fragile ecosystems and limited spatial distribution. Traditional 2D landscape analysis often fails to capture the vertical heterogeneity of island topography, vegetation, and buildings, leading to inaccurate ecological assessments. To address this, we developed an innovative 3D landscape assessment and zoning framework. Using 205 inhabited islands across 11 representative coastal counties in China as a case study, we constructed four key 3D indices (human interference index, landscape fragmentation index, the 3D vegetation index and the 3D building index) and applied K-means clustering to classify island functions at macro (county) and micro (island) scales, comparing the results with a 2D perspective. The 3D analysis provides a more accurate assessment, revealing significantly higher levels of anthropogenic disturbance and landscape fragmentation that are systematically underestimated by 2D methods. This led to a critical reclassification: the zoning types of 4 island counties and 12 islands changed. Some areas previously considered moderately developed were re-identified as high-intensity development centers due to their significant building volumes and vertical structures. Our 3D framework offers crucial managerial applications, enabling planners to more accurately diagnose ecological pressures and refine functional zoning. This approach provides a robust scientific basis for adjusting urban planning guidelines, optimizing resource allocation, and developing targeted conservation strategies that account for vertical landscape connectivity.

岛屿作为独特的地理单元，由于其脆弱的生态系统和有限的空间分布，面临着越来越大的人为压力。传统的二维景观分析往往无法捕捉岛屿地形、植被和建筑物的垂直异质性，导致生态评估不准确。为了解决这个问题，我们开发了一个创新的3D景观评估和分区框架。以中国11个代表性沿海县域205个有人居住岛屿为例，构建了人为干扰指数、景观破碎化指数、三维植被指数和三维建筑指数4个关键三维指数，并应用K-means聚类方法对宏观（县）和微观（岛）尺度的岛屿功能进行分类，并与二维视角下的结果进行比较。3D分析提供了更准确的评估，揭示了明显更高水平的人为干扰和景观破碎化，而这些都被2D方法系统地低估了。这导致了一次关键的重新分类：4个岛屿县和12个岛屿的分区类型发生了变化。一些以前被认为是适度发展的地区，由于其巨大的建筑体量和垂直结构，被重新确定为高强度发展中心。我们的3D框架提供了关键的管理应用程序，使规划者能够更准确地诊断生态压力并完善功能分区。该方法为调整城市规划指导方针、优化资源配置和制定考虑垂直景观连通性的有针对性的保护策略提供了强有力的科学依据。

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引用次数: 0

Automated knowledge extraction from marine accident reports using large language models: Graph construction and evaluation 基于大型语言模型的船舶事故报告知识自动提取：图的构建与评价

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-25 DOI: 10.1016/j.ocecoaman.2025.108015

Yujie Huang , Ran Yan , Zhipeng Zhang

Marine accident investigation reports contain valuable yet underutilized information due to their unstructured nature. While knowledge graphs (KGs) offer a promising solution for structured modeling and quantitative reasoning based on these reports, the construction of high-quality, domain-specific KGs remains technically challenging. To enable more efficient and scalable knowledge extraction in maritime safety domain, this study proposes an automated pipeline based on large language models (LLMs) which enhances existing approaches by customizing LLM prompting and evaluation frameworks. A chain-of-thought and one-shot prompting method is adopted to identify critical hazardous factors and their coupling relationships. Besides, a comprehensive quality assessment framework is developed to assess the accuracy and complexity of the generated KGs. Applied to real-world accident reports from maritime authorities, the proposed LLM-based method demonstrates substantial improvements in automation efficiency and extraction accuracy compared with traditional approaches. Furthermore, the quality evaluation framework provides complementary indicators to traditional metrics by reflecting the global semantic coherence and structural redundancy of the maritime safety KG. The findings offer actionable insights for deploying LLM-based tools to support data-driven maritime risk analysis enhancing transport safety management and decision making in complex operational environments.

海上事故调查报告由于其非结构化的性质，包含有价值但未被充分利用的信息。虽然知识图（KGs）为基于这些报告的结构化建模和定量推理提供了一个很有前途的解决方案，但构建高质量的、特定领域的KGs在技术上仍然具有挑战性。为了使海上安全领域的知识提取更加高效和可扩展，本研究提出了一种基于大型语言模型（LLM）的自动化管道，该管道通过定制LLM提示和评估框架来增强现有方法。采用思维链和一次性提示法识别关键危险因素及其耦合关系。此外，开发了一个全面的质量评估框架来评估生成的kg的准确性和复杂性。应用于海事当局的实际事故报告，与传统方法相比，所提出的基于llm的方法在自动化效率和提取精度方面有了实质性的提高。此外，质量评估框架通过反映海上安全KG的全局语义一致性和结构冗余，为传统指标提供了补充指标。研究结果为部署基于llm的工具提供了可操作的见解，以支持数据驱动的海上风险分析，从而在复杂的操作环境中加强运输安全管理和决策。

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引用次数: 0

Risk-based assessment of climate change–induced hazards in arid, data-scarce coastal zones 干旱、数据匮乏沿海地区气候变化引发的灾害风险评估

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-25 DOI: 10.1016/j.ocecoaman.2025.108024

Mohammad Reza Nikoo , Hossein Yousefi , Malik Al-Wardy , Ghazi Al-Rawas , Rouzbeh Nazari , Ahlam Al Hanai , Khalifa Al-Zeidi

This study integrated climate hazard assessment with coastal vulnerability analysis to evaluate marine and terrestrial risks along Oman's coastline. The fifth-generation ECMWF atmospheric reanalysis of the global climate (ERA5) and observed data, combined with downscaling and bias correction, were utilized to estimate key climate indicators, including Maximum Daily Precipitation (MDP) and Sea Surface Temperature (SST), under the Sixth Assessment Report (AR6) scenarios of IPCC. Coastal vulnerability was assessed via ten indicators, including topography, shoreline change, land cover, coastal slop, soil texture, sea depth, circularity ratio of watersheds, population density, biodiversity intactness, and marine natural reserves, weighted through the Analytic Hierarchy Process (AHP). The results indicate vulnerability in the northern areas, near Masirah, and along the Salalah coast. The changes in the MDP range from −8 to 323 mm under SSP3-7.0, whereas the increases in the winter and summer SSTs reach 1.4 °C and 2.2 °C, respectively, under SSP3-7.0. High-risk hotspots, including the Muscat–Seeb–Sohar corridor, Masirah, and Salalah, were identified. These results underscore the need to implement sustainable coastal management strategies to mitigate the adverse effects of climate change.

该研究将气候危害评估与沿海脆弱性分析相结合，评估了阿曼海岸线的海洋和陆地风险。利用第五代ECMWF全球气候大气再分析（ERA5）和观测资料，结合降尺度和偏倚校正，估算了IPCC第六次评估报告（AR6）情景下的最大日降水量（MDP）和海温（SST）等关键气候指标。采用层次分析法（AHP）对地形、岸线变化、土地覆盖、海岸坡度、土壤质地、海深、流域圆度比、人口密度、生物多样性完整性和海洋自然保护区等10个指标进行加权评价。结果表明，在北部地区，靠近马西拉，沿着塞拉莱海岸的脆弱性。在SSP3-7.0下，MDP的变化范围为- 8 ~ 323 mm，而冬季和夏季海温的增加分别达到1.4°C和2.2°C。确定了高风险热点地区，包括马斯喀特-塞卜-索哈尔走廊、马西拉和塞拉莱。这些结果强调了实施可持续沿海管理战略以减轻气候变化不利影响的必要性。

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引用次数: 0

Spatial and temporal pattern of the plankton community during the Water-Sediment Regulation in the Yellow River estuary 黄河口水沙调节过程中浮游生物群落的时空格局

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-24 DOI: 10.1016/j.ocecoaman.2025.108025

Lulei Liu , Sichen Zheng , Xiaomin Zhang , Fan Li , Biao Wu , Liqing Zhou , Zhihong Liu , Yuze Mao , Xiujun Sun

Human activities have profound impacts on the plankton communities and diversity in the sea. The Yellow River Water-Sediment Regulation Scheme (WSRS), diverting large volumes of freshwater and sediment into the sea, may influence the plankton community spatially and temporally in the Yellow River estuary and adjacent regions. To understand the potential ecological effects of WSRS on plankton community and diversity, 18 S rDNA sequencing was performed for the plankton samples collected in the Yellow River estuary during the period of WSRS. A total of 268 plankton genera were identified in 15 field samples from three sections (North, Middle, and South) of the Yellow River estuary and adjacent regions. For the spatial scale, Arthropoda was the predominant phylum consistently detected in the North, Middle, and South sections. For the time scale, Arthropoda was identified to be the predominant phylum during June (pre-WSRS) and July (inter-WSRS), accounting for 76.74 % and 78.99 %, respectively. In contrast, the proportion of Arthropoda during August (post-WSRS) was decreased to 23.89 %, respectively. The relative abundance of Chlorophyta increased to 31.11 % during August (post-WSRS). Beta diversity analysis (PCoA, ANOSIM) revealed distinct separation in plankton community structure between post-WSRS and pre/inter-WSRS periods. Our findings suggest that the WSRS, as a massive human-induced disturbance, likely acts as a key driver in reshaping the planktonic community in the Yellow River estuary. This study provides critical insights for evaluating the ecological impacts of the WSRS and informing sustainable management strategies for large river deltas. These findings underscore the necessity of integrating ecological monitoring into the WSRS to balance sediment management and ecosystem sustainability in the Yellow River estuary and beyond.

人类活动对海洋浮游生物的群落和多样性产生了深远的影响。黄河水沙调控方案（WSRS）将大量的淡水和泥沙引入海，对黄河口及邻近海域的浮游生物群落产生了时空上的影响。为了进一步了解水rs对黄河口浮游生物群落和多样性的潜在生态影响，对水rs期间采集的黄河口浮游生物样本进行了18s rDNA测序。在黄河口及邻区北、中、南3段15份野外取样中，共鉴定出268种浮游生物。在空间尺度上，节肢动物为优势门，在北、中、南剖面均有发现。在时间尺度上，节肢动物在6月（wsrs前）和7月（wsrs间）分别占76.74%和78.99%，为优势门。8月节肢动物比例下降至23.89%。8月（wsrs后）绿藻相对丰度增加至31.11%。Beta多样性分析（PCoA， ANOSIM）显示，浮游生物群落结构在wsrs后和wsrs前/间存在明显差异。我们的研究结果表明，wrs作为一种大规模的人为干扰，可能是重塑黄河口浮游生物群落的关键驱动因素。该研究为评价长江三角洲的生态影响和为大型河流三角洲的可持续管理策略提供了重要的见解。这些发现强调了将生态监测纳入wrs的必要性，以平衡黄河口及其他地区的泥沙管理和生态系统可持续性。

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引用次数: 0

Microplastic existence in two feeding zones of whale shark (Rhincodon typus) in Gulf of California, Mexico 墨西哥加利福尼亚湾鲸鲨（Rhincodon typus）两个摄食区存在微塑料

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-24 DOI: 10.1016/j.ocecoaman.2025.108012

Stephanie Itzel Villagómez Vélez , Sakthi Selva Lakshmi Jeyakumar , Felipe Galván Magaña , Rogelio González Armas , Francisco Rodríguez González , Lorena Ríos Mendoza , Lirio Jazmín Sánchez-Hernández , Jonathan Muthuswamy Ponniah

This study quantifies microplastics collected from two different feeding zones of whale shark (Rhincodon typus) from Bahia de los Angeles (BLA) and Bahia de La Paz (BLP) from Gulf of California using the Manta trawl method. Higher prevalence in BLP (287 items) than BLA (169 items) is dominated by fibers and fragments. Spatial distribution in BLP revealed MPs was (mean value 0.65 items/m³) among the five transect sites, whereas in BLA is 12.54 items/m³. Observed variability in this study was resulted from sampling technique that included depth, sampling time, speed, which is also found significant through the statistical analysis. Dominating morphotypes were fibers and fragments and surface features showed a strong thermo-oxidative weathering process with severe mechanical weathering process. Detected polymers of PP, PE, HDPE, PS, LDPE, PA also showed multiple origins from preexisting anthropogenic pressures. Though this study doesn't involve any biological samples, yet the current study emphasizes the importance of continuous monitoring of MPs in Gulf of California, where ingestion of MPs will potentially affect the long time survival.

本研究使用蝠鲼拖网法对从洛杉矶巴伊亚岛（BLA）和加利福尼亚湾拉巴斯巴伊亚岛（BLP）两个不同的鲸鲨（Rhincodon typus）摄食区收集的微塑料进行了量化。BLP的患病率（287项）高于BLA（169项），以纤维和碎片为主。5个样点的MPs平均为0.65个项目/m3，而BLA的MPs平均为12.54个项目/m3。本研究中观察到的变异性来自于采样技术，包括深度、采样时间、速度，通过统计分析也发现这些变异性具有显著性。其表面特征表现为强烈的热氧化风化过程和剧烈的机械风化过程。检测到的PP、PE、HDPE、PS、LDPE、PA等聚合物也显示出来自先前存在的人为压力的多重来源。虽然这项研究没有涉及任何生物样本，但目前的研究强调了在加利福尼亚湾持续监测MPs的重要性，在那里摄入MPs可能会影响长期生存。

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引用次数: 0

Leveraging environmental DNA monitoring technology to improve biodiversity detection and recognize a broader range of functional organisms in remote coral reef ecosystems: A case study from Mischief Reef 利用环境DNA监测技术提高生物多样性检测和识别偏远珊瑚礁生态系统中更广泛的功能生物：以美济礁为例

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-11-22 DOI: 10.1016/j.ocecoaman.2025.108017

Peng Xu , Jianfeng Gan , Lintao Huang , Danping Xie , Hui Huang

Environmental DNA (eDNA) metabarcoding is a method that extracts species information from environmental samples, thereby aiding in the establishment or enhancement of biodiversity assessments. This study employed eDNA and Underwater Visual Census (UVC) to obtain baseline data on the biodiversity of Mischief Reef, explore the efficacy of eDNA in detecting functional organisms, and shed light on alterations in community structure and their contributing factors. Initially, we detected organisms at nine stations with eDNA and UVC in spring, detected 178 fish and macroinvertebrates (crustacean and mollusca) species by eDNA, 151 species by UVC, respectively. The One-way analysis of variance results showed that eDNA method was superior to UVC method in detecting phylum, class, order, family, genus, and species (p < 0.01). The functional space of eDNA organisms encompassed that of UVC organisms. Significant positive correlations were found between eDNA and attributes such as activity period, diet, mean trophic level (TL), maximum body length range, and fishing vulnerability. No correlations were observed between UVC and functional attributes of organisms. The taxonomic diversity, phylogenetic diversity, and functional diversity monitored by eDNA were all significantly higher than those monitored by UVC. The interaction between the biodiversity monitored by eDNA and the environment was more significant than that monitored by UVC. Our study underscores the effectiveness of eDNA in identifying functional organisms in coral reefs and in reflecting differences in ecosystem community structure.

环境DNA元条形码是一种从环境样本中提取物种信息，从而帮助建立或加强生物多样性评价的方法。本研究利用eDNA和水下视觉普查（UVC）技术获取美济礁生物多样性基线数据，探讨eDNA检测功能生物的功效，揭示群落结构变化及其影响因素。首先，我们在春季用eDNA和UVC检测了9个站点的生物，eDNA和UVC分别检测了178种鱼类和151种大型无脊椎动物（甲壳类和软体动物）。单因素方差分析结果显示，eDNA法在门、纲、目、科、属、种检测上优于UVC法（p < 0.01）。eDNA生物的功能空间包含了UVC生物的功能空间。eDNA与活动期、饮食、平均营养水平（TL）、最大体长范围和捕捞脆弱性等属性呈显著正相关。UVC与生物体的功能属性之间没有相关性。eDNA监测的植物分类多样性、系统发育多样性和功能多样性均显著高于UVC监测的植物。eDNA监测的生物多样性与环境的交互作用比UVC监测的更显著。我们的研究强调了eDNA在识别珊瑚礁功能生物和反映生态系统群落结构差异方面的有效性。

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