Ocean & Coastal Management最新文献_第3页

Shallow gas accumulation shaped by morphological evolution in the Changjiang subaqueous delta: Implications for seabed instability and geohazard management 长江水下三角洲形态演化形成的浅层天然气成藏：对海底不稳定和地质灾害管理的启示

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-14 DOI: 10.1016/j.ocecoaman.2026.108096

Shihao Liu , Yufeng Chen , Wei Feng

River deltas are crucial repositories of organic carbon, particularly in their coastal regions from the river mouth to the delta front. Although these regions are influenced by a range of physical and biogeochemical processes, the impact of such processes on shallow gas, a vital form of organic carbon storage, remains poorly understood. Here, we integrate ∼2700 km of high-resolution seismic profiles with sedimentological and geomorphological datasets to investigate how the morphological evolution of the Changjiang (Yangtze River) Estuary, especially the progradation of mouth-bar shoals and their recent retreat, has shaped the accumulation, migration, and release potential of shallow gas. Our results delineate three distinct zones from the subaqueous river mouth to the delta front, each displaying contrasting gas accumulation patterns governed by morphodynamic processes. In the northern subaqueous delta, rapid sediment accretion and high organic-carbon burial enhance methane generation, causing pronounced gas-front surges over 5 m in height, accompanied by irregular or jagged front morphologies and dense gas chimneys. We attribute these features to combined deep-sourced methane migration and in-situ methanogenesis, modulated by variations in sediment thickness and sealing bed properties associated with shoal progradation and retreat. In contrast, the southern sector exhibits thinner cap beds and stronger hydrodynamic forcing, which promote gas release and near-equilibrium gas fronts. We document large gas-related pockmarks (up to 150–200 m wide) and active venting features, suggesting that methane migration contributes to localized seabed instability. These venting structures are located near major engineering corridors and ecologically sensitive areas, highlighting their relevance for infrastructure safety and environmental management. These findings have broader implications for understanding methane behavior in deltaic systems and emphasize the importance of incorporating shallow gas mapping into coastal geohazard assessments, marine spatial planning, and coastal infrastructure design in gas-bearing deltaic environment.

河流三角洲是有机碳的重要储存库，特别是在河口到三角洲前缘的沿海地区。尽管这些地区受到一系列物理和生物地球化学过程的影响，但这些过程对浅层气体（有机碳储存的重要形式）的影响仍然知之甚少。在这里，我们将约2700公里的高分辨率地震剖面与沉积学和地貌学数据集相结合，研究长江口（长江）口的形态演化，特别是河口滩的进淤及其近期的退缩，如何塑造了浅层天然气的聚集、运移和释放潜力。我们的研究结果描绘了从水下河口到三角洲前缘三个不同的区域，每个区域都显示出由形态动力学过程控制的不同的天然气聚集模式。在北部水下三角洲，快速的沉积物增生和较高的有机碳埋藏促进了甲烷的生成，导致5 m以上高度的气锋涌动明显，并伴有不规则或锯齿状的前缘形态和密集的气烟囱。我们将这些特征归因于深层甲烷迁移和原位甲烷生成的结合，并受到与浅滩进退相关的沉积物厚度变化和密封层性质的调节。南段盖层较薄，水动力强迫较强，有利于气体释放和接近平衡的气锋。我们记录了与气体有关的大麻子（高达150-200米宽）和活跃的喷口特征，表明甲烷迁移有助于局部海底不稳定。这些通风结构位于主要工程走廊和生态敏感区附近，突出了它们与基础设施安全和环境管理的相关性。这些发现对理解三角洲系统中的甲烷行为具有更广泛的意义，并强调了在含气三角洲环境中将浅层天然气测绘纳入沿海地质灾害评估、海洋空间规划和沿海基础设施设计的重要性。

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引用次数: 0

Structure and socio-economics of the value chain of the artisanal billfish fishery in Tanzania, Western Indian Ocean: Implications for management and conservation 西印度洋坦桑尼亚手工长嘴鱼渔业价值链的结构和社会经济学：对管理和保护的影响

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-13 DOI: 10.1016/j.ocecoaman.2026.108095

Emmy Mwanjali , Nelly Isigi Kadagi , Nina Wambiji , Lydia Gaspare

This study presents an in-depth value chain analysis (VCA) of the artisanal billfish fishery in Tanzania, focusing on its structure, socio-economic dynamics, and governance. Despite their ecological and economic significance, billfish fisheries in the Western Indian Ocean remain under-researched, especially in small-scale contexts. Using qualitative data from Mafia Island, Dar es Salaam, Mtwara, and Zanzibar, this research mapped the billfish value chain. It examined the roles of key stakeholders from fishers to consumers alongside the flow of products, finance, and information. The findings revealed a fragmented value chain characterized by informal governance structures, weak bargaining power for fishers and limited value addition at the production level. Traders exerted significant influence through pricing and credit arrangements, while relational and captive governance typologies characterized the interactions between fisher-traders. Infrastructure gaps, lack of financial access, and limited post-harvest processing constrained equitable benefit distribution and sustainability. The study highlighted the need for inclusive governance reforms, investments in cold storage and processing facilities, and enhanced fisher participation in decision-making. The findings have significant implications for the joint development of policies and frameworks to enhance the sustainability and resilience of artisanal fisheries in Tanzania and the Western Indian Ocean (WIO) region.

本研究对坦桑尼亚的手工长嘴鱼渔业进行了深入的价值链分析（VCA），重点关注其结构、社会经济动态和治理。尽管它们具有生态和经济意义，但西印度洋的长嘴鱼渔业仍未得到充分研究，特别是在小规模的背景下。利用来自黑手党岛、达累斯萨拉姆、姆特瓦拉和桑给巴尔的定性数据，本研究绘制了旗鱼价值链。它考察了从渔民到消费者的主要利益相关者的作用，以及产品、资金和信息的流动。调查结果显示，价值链碎片化，其特点是治理结构不正规，渔民的议价能力较弱，生产层面的附加值有限。贸易商通过定价和信贷安排发挥了重大影响，而关系和俘虏治理类型则是渔民-贸易商之间互动的特征。基础设施差距、缺乏融资渠道和有限的收获后加工限制了公平的利益分配和可持续性。该研究强调了包容性治理改革、冷库和加工设施投资以及加强渔民参与决策的必要性。研究结果对共同制定政策和框架以提高坦桑尼亚和西印度洋（WIO）区域手工渔业的可持续性和复原力具有重要意义。

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引用次数: 0

Using chain event graphs to understand cruise-ship passengers’ bookings of tourist excursion trains 利用链式事件图了解邮轮旅客对旅游游览列车的预订情况

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-13 DOI: 10.1016/j.ocecoaman.2025.108063

Rodrigo A. Collazo , James Henry , Andrea Insch , Geraldine Mcleod , Jordan van der Klei , Jim Q. Smith

Several documented weaknesses in current market segmentation techniques exist that may reduce the accuracy and optimization of marketing decision-making supporting cruise ship passenger onshore excursion choice. These weaknesses relate to the data analysis techniques used as part of the market segmentation of cruise ship passengers. This paper presents a new analytical method to overcome some of the weaknesses of the existing approaches, the Chain Event Graph (CEG). Adopting a Bayesian approach, the CEG model offers a market segmentation method to aid the identification of specific groups of passengers, based on their behavioral tendencies and demographic characteristics, and match them with targeted marketing communications promoting specific onshore excusion options. Ultimately, the CEG enables the design of marketing programs to improve the distribution of customers within a tourism operator's portfolio of offerings. This capability is important for those businesses and DMOs in cruise tourism and supporting transport sectors whose offerings are often perishable, inflexible and have uncertain customer demand. In this study, we use the CEG approach to segment cruise ship passengers' choice of train excursion for their onshore visit to Ōtepoti Dunedin, Aoetearoa New Zealand.

Considering the limitations of existing methods of market segmentation, in this paper CEG has been demonstrated to elicit parsimonious models that can illuminate the process dynamic of consumer behavior and optimize the use of available data. As we show using the example of cruise-ship passengers booking a train excursion, three viable segments were identified based on their choice of choice of train excursion related to two variables (age and propensity for cruise travel). Cruise passengers can also be segmented into four groups based on their information search and booking location behaviour and preference for public or cruise trains. Furthermore, the results of the study demonstrate that a comparison with another approach using a Bayesian Network model showed superiority of the CEG method. Overall, CEG provides destination and tourism operators’ marketing managers with a tree-based graphical model, which depicts the steps and behavior patterns in the process of booking a train excursion and the probability of each possible pathway.

目前的市场细分技术存在一些弱点，这些弱点可能会降低支持游轮乘客岸上游览选择的营销决策的准确性和优化。这些弱点与作为游轮乘客市场细分的一部分所使用的数据分析技术有关。本文提出了一种新的分析方法，即链事件图（CEG），以克服现有方法的一些缺点。CEG模型采用贝叶斯方法，提供了一种市场细分方法，根据乘客的行为倾向和人口特征，帮助识别特定的乘客群体，并将其与有针对性的营销传播相匹配，促进特定的在岸排斥选择。最终，CEG使营销计划的设计能够在旅游运营商的产品组合中改善客户的分布。这种能力对于邮轮旅游和支持运输部门的企业和dmo来说非常重要，因为这些部门的产品往往容易变质、不灵活，而且客户需求不确定。在本研究中，我们使用CEG方法对游轮乘客选择乘坐火车前往新西兰达尼丁Ōtepoti的陆上旅游进行细分。考虑到现有市场细分方法的局限性，本文证明了CEG可以推导出简洁的模型，这些模型可以阐明消费者行为的过程动态并优化可用数据的使用。正如我们使用预订火车旅行的游轮乘客的例子所示，根据他们选择与两个变量（年龄和游轮旅行倾向）相关的火车旅行的选择，确定了三个可行的区段。邮轮乘客也可以根据他们的信息搜索和预订位置行为以及对公共或邮轮列车的偏好分为四类。此外，研究结果表明，与使用贝叶斯网络模型的另一种方法相比，CEG方法具有优越性。总体而言，CEG为目的地和旅游运营商的营销经理提供了一个基于树的图形模型，该模型描述了预订火车游览过程中的步骤和行为模式，以及每种可能路径的概率。

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引用次数: 0

Harnessing AI for smarter water management under a changing climate: A review of machine learning and deep learning applications within EU water framework directive and marine strategy framework directive 在不断变化的气候下利用人工智能进行更智能的水资源管理：机器学习和深度学习在欧盟水框架指令和海洋战略框架指令中的应用综述

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-12 DOI: 10.1016/j.ocecoaman.2026.108093

Angelica Bianconi , Elisa Furlan , Sebastiano Vascon , Andrea Critto

The Marine Strategy Framework Directive (MSFD) and the Water Framework Directive (WFD) are key EU policies for safeguarding marine and freshwater ecosystems. They establish targets and evaluation frameworks to ensure good environmental and ecological status. This paper reviews the application of machine learning (ML) and deep learning (DL) in supporting these directives. A dual approach is used: a scientometric analysis to map the research landscape, followed by a systematic review of selected studies. The review focuses on three main areas: (i) use of spatio-temporal data, (ii) integration of climate-related scenario analysis, and (iii) application of ML and DL methods to enhance directive implementation. Results highlight the growing role of AI in water management, demonstrating its potential in handling large datasets, revealing patterns, and supporting predictive decision-making. Nonetheless, significant gaps remain. The underuse of spatio-temporal data hinders predictive accuracy, and scenario analysis methods often fail to capture the full complexity of climate impacts on aquatic systems. These limitations constrain the effectiveness of data-driven policy decisions. The paper calls for further research to better incorporate temporal dynamics in AI models and to refine scenario analysis tools. Such improvements are crucial for advancing adaptive, informed strategies in water resource management aligned with European directives.

海洋战略框架指令（MSFD）和水框架指令（WFD）是欧盟保护海洋和淡水生态系统的关键政策。他们建立目标和评估框架，以确保良好的环境和生态状况。本文回顾了机器学习（ML）和深度学习（DL）在支持这些指令中的应用。采用了一种双重方法：一种科学计量分析来绘制研究图景，然后对选定的研究进行系统回顾。该综述集中在三个主要领域：(i)时空数据的使用，（ii）与气候相关的情景分析的整合，以及（iii）应用ML和DL方法来加强指令的实施。研究结果强调了人工智能在水资源管理中日益重要的作用，展示了其在处理大型数据集、揭示模式和支持预测性决策方面的潜力。尽管如此，巨大的差距依然存在。时空数据的利用不足影响了预测的准确性，情景分析方法往往无法捕捉气候对水生系统影响的全部复杂性。这些限制限制了数据驱动的政策决策的有效性。该论文呼吁进一步研究，以更好地将时间动态纳入人工智能模型，并完善情景分析工具。这种改进对于推进符合欧洲指令的适应性、知情的水资源管理战略至关重要。

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引用次数: 0

Construction and validation of a novel universal model for predicting hydrodynamic effects of intensive raft aquaculture in semi-enclosed bays 半封闭海湾密集筏养殖水动力效应预测新通用模型的构建与验证

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-10 DOI: 10.1016/j.ocecoaman.2025.108079

Mengji Zhang , Kuai Li , Zenghui Li , Changyang Sun , Zhiwei Feng , Wenhui Liao , Shang Jiang , Jin Luo , Xiang Sun

Raft systems are widely used for cultivating large seaweeds (e.g., kelp) and shellfish (e.g., oysters). However, quantifying the impacts of high-density raft aquaculture on hydrodynamic conditions in semi-enclosed bays remains a significant challenge. Using Crassostrea hongkongensis as a representative species, this study introduces roughness height—estimated from friction velocity and roughness length—to characterize hydrodynamic alterations induced by raft aquaculture. Empirical linear relationships between roughness height and cultivation density were derived from field measurements using Acoustic Doppler Current Profilers (ADCPs) across 29 floating and 12 submerged rafts. Furthermore, roughness height is introduced as a parameterized drag term, enabling a coupled advection–dispersion module to predict the spatio-temporal dynamics of hydrodynamic conditions under high-density raft aquaculture scenarios. Tidal prism, half-exchange period, and nutrient concentrations were proposed as key indicators for quantifying aquaculture impacts through comparative simulations. Results revealed a significant positive linear correlation between roughness height and cultivation density. Model application in a typical semi-enclosed bay (Qinzhou Bay, China) produced high-accuracy predictions and demonstrated that raft aquaculture facilities significantly reduced surface current velocities (by 30.8–65.2 % for submerged rafts), decreased the tidal prism by 9.6 %, and lengthened the half-exchange period from 36.8 days to 46.1 days (a 9.3-day increase). The established coupled advection-dispersion module parameterized by raft-aquaculture-altered roughness height could be applied to other related case studies.

筏式系统广泛用于养殖大型海藻（如海带）和贝类（如牡蛎）。然而，量化高密度筏养殖对半封闭海湾水动力条件的影响仍然是一个重大挑战。以香港长牡蛎（Crassostrea hongkong gensis）为代表物种，引入粗糙度高度（由摩擦速度和粗糙度长度估算）来表征筏式养殖引起的水动力变化。利用声学多普勒电流剖面仪（ADCPs）对29个浮筏和12个沉筏进行实地测量，得出了粗糙度高度与种植密度之间的经验线性关系。此外，引入粗糙度高度作为参数化阻力项，使平流-色散耦合模块能够预测高密度筏养殖情景下水动力条件的时空动态。通过对比模拟，提出潮汐棱镜、半交换期和养分浓度作为量化水产养殖影响的关键指标。结果表明，粗糙度高度与栽培密度呈显著的线性正相关。在典型的半封闭海湾（钦州湾）进行模型应用，得到了高精度的预测结果，结果表明筏式养殖设施显著降低了表面流速度（沉筏降低30.8% ~ 65.2%），潮汐棱镜降低9.6%，半交换周期从36.8天延长到46.1天（增加9.3天）。建立的平流-色散耦合模型可应用于其他相关案例研究。

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引用次数: 0

Monitoring the reserve effect of a coastal no-take area in the northeast Atlantic along the first ten years of implementation 监测东北大西洋沿海禁渔区实施的头十年的储备效果

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-09 DOI: 10.1016/j.ocecoaman.2025.108075

Ana Filipa Silva , José Lino Costa , Patrícia Teodoro , João J. Castro , Pedro Raposo de Almeida , Bernardo Ruivo Quintella

Marine Protected Areas (MPAs) have been widely implemented to protect habitats and species and promote sustainable fisheries. In 2011 several coastal areas were closed to fishing in a southwestern Portuguese MPA (SACVMP – ‘Sudoeste Alentejano’ and ‘Costa Vicentina’ Marine Park), including the Pessegueiro Island no-take area. To assess its effectiveness, experimental fishing surveys were conducted in an early protection period (2011–2013) and nearly a decade later (2019–2021), in the no-take area and two control areas. Fish were sampled using bottom otter trawl (sandy habitats) and trammel nets (rocky and sandy bottoms) in winter and summer. Spatial and temporal comparisons were performed for both the overall fish assemblage (abundance, biomass, species richness, and structure) and the dominant commercial species (abundance, biomass, size, and juvenile proportion). Results showed generally positive trends over time, particularly in the no-take area for larger-bodied commercial species. Scorpaena porcus and Trisopterus luscus specimens with legal landing size increased in abundance, while Phycis phycis specimens were significantly bigger inside the protected area. Larger sizes of legal landing size specimens of the endangered and protected species Raja undulata inside the no-take area also highlight its importance. However, increasing differences among areas over time suggest that a steady state may not yet have been reached after ten years of protection, and the likely reasons for this are discussed. Nonetheless, these results provide evidence of a reserve effect in a relatively small no-take area within the first decade of implementation.

海洋保护区（MPAs）已广泛实施，以保护栖息地和物种，促进可持续渔业。2011年，葡萄牙西南部海洋保护区（SACVMP -“Sudoeste Alentejano”和“Costa Vicentina”海洋公园）的几个沿海地区禁止捕鱼，包括Pessegueiro岛禁渔区。为了评估其有效性，在禁渔区和两个控制区分别在保护期早期（2011-2013年）和近十年后（2019-2021年）进行了实验性捕捞调查。在冬季和夏季使用底水獭拖网（沙质栖息地）和束缚网（岩石和沙质底部）对鱼类进行取样。对总体鱼类组合（丰度、生物量、物种丰富度和结构）和优势商业物种（丰度、生物量、大小和幼鱼比例）进行了时空比较。结果显示，随着时间的推移，总体呈积极趋势，特别是在大型商业物种的禁捕区。在保护区内，合法着陆尺寸的猪Scorpaena porcus和三翅猴luscus标本数量增加，而物理标本数量明显增加。禁捕区内的濒危和受保护物种波拉贾的合法着陆尺寸较大的标本也突出了它的重要性。然而，随着时间的推移，各地区之间的差异越来越大，这表明在十年的保护之后，可能还没有达到一个稳定的状态，对此可能的原因进行了讨论。尽管如此，这些结果提供了证据，证明在实施的第一个十年内，在一个相对较小的禁渔区产生了储备效应。

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引用次数: 0

Development and application of an evaluation indicator system for assessing Areas of Ecological Significance in the Southern Ocean 南大洋生态意义区评价指标体系的建立与应用

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-07 DOI: 10.1016/j.ocecoaman.2025.108086

Wen Wu , Jiahe Yu , Zhenjie Xie , Junru Xu , Zhiyuan Ma , Bin Xie , Weiwei Yu , Bin Chen , Dehai Song

The Southern Ocean plays a critical role in global climate regulation and harbors unique biodiversity increasingly threatened by climate change and expanding fisheries. This study establishes a systematic framework to identify Areas of Ecological Significance (AESs) through integrated spatial evaluation of marine environmental, biodiversity, and ecological functional indicators. Combining bibliometric analysis, expert consultation (Delphi method), and geospatial modeling, we identified 10 key evaluation criteria, highlighting benthic organism distribution, chlorophyll-a concentration, seabird presence, and krill abundance as dominant factors. Single- and multi-factor analyses revealed concentrated AES hotspots along coastal regions of the Ross Sea, Weddell Sea, Amundsen Sea, and Cosmonaut Sea. These areas exhibit exceptional productivity but face significant conservation gaps. Although aligned with existing Marine Protected Areas (MPAs) like the Ross Sea region, our results underscore urgent protection needs for climate-vulnerable sectors currently lacking formal protection. The three-tiered evaluation framework (environment-biodiversity-function) advances large-scale marine spatial planning but requires improved data integration, particularly for cetaceans, zooplankton, and carbonate chemistry, to address existing biases. This study provides a science-based foundation for international MPA designation while identifying critical knowledge gaps that must be addressed to safeguard the Southern Ocean's ecological integrity amid rapid environmental change.

南大洋在全球气候调节中发挥着关键作用，其独特的生物多样性正日益受到气候变化和渔业扩张的威胁。本研究通过对海洋环境、生物多样性和生态功能指标的综合空间评价，建立了识别生态重要性区域的系统框架。结合文献计量学分析、专家咨询（德尔菲法）和地理空间模型，我们确定了10个关键评价标准，强调底栖生物分布、叶绿素-a浓度、海鸟存在和磷虾丰度是主导因素。单因素和多因素分析显示，AES热点集中在罗斯海、威德尔海、阿蒙森海和宇航员海的沿海地区。这些地区表现出卓越的生产力，但面临着重大的保护缺口。尽管与罗斯海地区等现有海洋保护区（MPAs）相一致，但我们的研究结果强调了目前缺乏正式保护的气候脆弱部门迫切需要保护。三层评价框架（环境-生物多样性-功能）推进了大规模的海洋空间规划，但需要改进数据整合，特别是对于鲸类、浮游动物和碳酸盐化学，以解决现有的偏差。本研究为国际海洋保护区的指定提供了科学依据，同时确定了在快速环境变化中必须解决的关键知识空白，以保护南大洋的生态完整性。

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引用次数: 0

Marine industrial ecologicalization in China's Bohai Rim: A spatial structure perspective 环渤海地区海洋产业生态化：一个空间结构视角

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-06 DOI: 10.1016/j.ocecoaman.2025.108087

Zhe Yu , Qianbin Di , Wenzhen Zhao , Wenhui Li , Zhenyu Zhu , Liangyu Li

Industrial ecologicalization plays a crucial role in promoting high-quality economic development in coastal regions. Building on existing research, this study investigates the mutual feedback dynamics and spatial transmission mechanisms of marine industrial ecologicalization. By integrating a systems engineering perspective with industrial ecology principles, we construct an evaluation framework for assessing the ecological quality of marine industries. Employing a geographical spatial approach, we analyze the spatiotemporal evolution and spatial heterogeneity of marine industrial ecological quality in the Bohai Rim cities. The results indicate that: (1) The ecological quality of marine industries in the Bohai Rim region exhibited steady growth from 2012 to 2022, shifting from low-value clustering to high-value dispersion. Spatially, it displays a pattern of “higher in the west and south, lower in the east and north,” with noticeable regional clustering. (2) The global spatiotemporal autocorrelation transitioned from heterogeneity to clustering, showing a gradual—though still modest—increase. Local autocorrelation patterns formed three major clusters centered around Dalian, Yantai–Qingdao, and Tianjin, alongside low-aggregation areas and scattered L–H spatiotemporal heterogeneous units. (3) Ecological transformation of marine industries demonstrates positive—albeit limited—spatial spillover effects.

产业生态化对促进沿海地区经济高质量发展具有重要作用。本研究在现有研究的基础上，探讨了海洋产业生态化的相互反馈动态和空间传递机制。结合系统工程视角与产业生态学原理，构建了海洋产业生态质量评价框架。运用地理空间分析方法，分析了环渤海城市海洋产业生态质量的时空演化特征和空间异质性。结果表明：(1)2012 - 2022年环渤海地区海洋产业生态质量呈现稳定增长趋势，由低价值集聚型向高价值弥散型转变；空间上呈现“西、南高、东、北低”的格局，区域集聚性明显。(2)全球时空自相关由异质性向聚类转变，呈现出缓慢增长的趋势。局部自相关模式形成以大连、烟台-青岛和天津为中心的3大集聚区，低集聚区和分散的L-H时空异质性单元。(3)海洋产业生态转型具有有限的空间溢出效应。

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引用次数: 0

Response of phytoplankton functional groups and biodiversity to seasonal changes in environmental factors in coastal waters 沿海水域浮游植物功能群和生物多样性对环境因子季节变化的响应

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-06 DOI: 10.1016/j.ocecoaman.2025.108068

Jian Qi , Xiajie Wang , Lichi Ding , Qinchao Zhang , Jiaxuan Li , Shimin Yang

引用次数: 0

Marine recreational fishing in Greece: Evidence from the field 希腊的海洋休闲钓鱼：来自实地的证据

IF 5.4 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2026-01-06 DOI: 10.1016/j.ocecoaman.2025.108077

Emmanouil Koutrakis , Αnastasios Papadopoulos , Paraskevi K. Karachle , Konstantinos Touloumis

During the period 2019–2022, we conducted on-site face-to-face interviews in selected areas of the North Aegean Sea, the Ionian Sea and the Saronikos Gulf, Greece, under the European Union Multi-Annual Programme, in order to evaluate the status of marine recreational fishing (MRF) in the country. We recorded 43,294 fish of 171 taxa from MRF trips (shore, boats and spearfishing), with 6790 fish being released, resulting in a total release ratio of 18 %. Shore fishing showed the highest release rate (21.14 %), followed by boat fishing (17.08 %), while no releases were recorded from spearfishing, thus indicating the high selectivity of this practice. Species composition, in terms of mean abundance per trip, was similar for both the North Aegean and Ionian Seas, while a somewhat different profile was observed for the Saronikos Gulf. In terms of mean biomass per trip, each area was characterized by diverse dominant species. Shore and boat fishing do not seem to exert pressure on any vulnerable species. In contrast, spearfishing, due to its high selectivity and the targeted species may exert pressure on vulnerable species and especially the endangered Dusky grouper, Epinephelus marginatus. The current study provides an exceptionally large, for the Mediterranean region, amount of data offering valuable information regarding both fishing activity and the profile of recreational fishers in Greece. Results from the on-site survey suggest that the implications of MRF are far from negligible. Despite the on-site survey's constraints, this approach allowed the collection of accurate first-hand data, mapping of MRF activity in the surveyed areas and high participation of foreign recreational fishers. The enforcement of a licensing system for MRF in Greece is considered essential for coherent monitoring and management of the sector.

在2019-2022年期间，根据欧盟多年计划，我们在希腊北爱琴海、爱奥尼亚海和萨罗尼科斯湾的选定区域进行了现场面对面访谈，以评估该国海洋休闲捕鱼（MRF）的状况。我们记录了171个分类群（岸上、船上和鱼叉捕捞）的43294条鱼，其中6790条鱼被释放，总释放率为18%。岸上捕捞的释放率最高（21.14%），其次是渔船捕捞（17.08%），而鱼叉捕捞没有记录释放，表明这种做法的选择性很高。就每次旅行的平均丰度而言，北爱琴海和爱奥尼亚海的物种组成是相似的，而萨罗尼科斯湾的情况则略有不同。在每趟平均生物量方面，每个地区都有不同的优势物种。岸上和船上捕鱼似乎不会对任何脆弱的物种施加压力。相比之下，鱼叉捕鱼由于其高选择性和目标物种，可能对脆弱物种，特别是濒临灭绝的石斑鱼，Epinephelus marginatus施加压力。目前的研究为地中海区域提供了非常大量的数据，提供了关于希腊捕鱼活动和休闲渔民概况的宝贵信息。现场调查的结果表明，核磁共振的影响远非微不足道。尽管现场调查受到限制，但这种方法可以收集准确的第一手数据，绘制调查地区的MRF活动图，并使外国休闲渔民高度参与。在希腊实施MRF许可制度被认为对该部门的一致监测和管理至关重要。

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