Journal of Sea Research最新文献_第2页

Assessing the impact of successive marine heatwaves on the diversity of rocky intertidal communities 评估连续的海洋热浪对岩石潮间带群落多样性的影响

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-20 DOI: 10.1016/j.seares.2026.102675

Ken Ishida , Yuki Kanamori , Yuan Yao , Yoko Wada , Takehisa Yamakita , Takashi Noda

In recent years, clarification of the impacts of marine heatwaves (MHWs) on marine ecosystems has become an important topic. However, most previous studies that have assessed impacts of MHWs have not adequately reduced stochasticity, which has led to insufficient assessment of the direct effects of MHWs. There are also few studies that evaluate the accumulative carryover effects; which occur when the effects of successive events accumulatively increase over time. In addition, many studies have examined the effects of MHWs on abundance, but relatively few on diversity. From 2010 to 2016, southeastern Hokkaido in northern Japan experienced successive MHWs. Here, we assessed the accumulative carryover effects and the impact of MHWs on diversity (species richness and abundance-weighted diversity indices) with reduced stochasticity for four major functional groups (macroalgae, sessile invertebrates, herbivorous mollusks, and carnivorous invertebrates) of rocky intertidal communities. Surveys were conducted before (2004–2009), during (2010–2016), and after (2017–2018) MHWs. We found that the accumulative carryover effects were not detected in diversity. The results demonstrate that MHWs are to lead to accumulative carryover effects on abundance than on diversity. We also found that the direct effects of MHWs on diversity (i.e., increase or decrease of diversity indices during and after MHWs) were different among the four functional groups. These results were due to differences in species composition within the functional groups, such as the proportion of warm water species and cold affinity species and the proportion of dominant species. Thus, multiple metrics should be quantified simultaneously when assessing impacts on MHWs.

近年来，海洋热浪对海洋生态系统的影响已成为一个重要的研究课题。然而，大多数先前评估mhw影响的研究都没有充分降低随机性，这导致对mhw直接影响的评估不足。也很少有研究评估累积的结转效应；当连续事件的影响随时间累积增加时，就会发生这种情况。此外，许多研究调查了mhw对丰度的影响，但对多样性的影响相对较少。2010年至2016年，日本北部的北海道东南部经历了连续的强震。本文以大型藻类、无根无脊椎动物、草食软体动物和肉食性无脊椎动物等4个主要功能类群为研究对象，对潮间带岩石群落的累积携带效应和mhw对多样性（物种丰富度和丰度加权多样性指数）的影响进行了评估。调查在mhw之前（2004-2009年）、期间（2010-2016年）和之后（2017-2018年）进行。我们发现在多样性中没有检测到累积的结转效应。结果表明，mhw对丰度的累积影响大于对多样性的累积影响。我们还发现，四个官能团对多样性的直接影响（即在mhw期间和之后多样性指数的增减）是不同的。这些结果是由于不同功能群内物种组成的差异，如温水种和冷亲和种的比例以及优势种的比例。因此，在评估对mhw的影响时，应同时量化多个指标。

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引用次数: 0

A coupled Swin transformer-LSTM network for high-resolution ocean wave forecasting: A reanalysis-driven skill assessment in the Chinese marginal seas 用于高分辨率海浪预报的耦合Swin变压器- lstm网络：中国边缘海域再分析驱动的技能评估

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-13 DOI: 10.1016/j.seares.2026.102670

Yongqiang Liu , Delei Li , Xiang Gong , Jianlong Feng , Hailong Liu , Jifeng Qi , Baoshu Yin

Accurate wave forecasting is essential for maritime safety and provides crucial scientific guidance for coastal operations and planning. Most artificial intelligence-based wave forecast models were conducted at coarse resolutions, e.g., 0.25° or 0.5° spatial resolution, and struggled to maintain high forecasting accuracy for extended periods. Here, we introduce the coupled Swin Transformer-LSTM network (SwinLSTM), a hybrid architecture designed to make a spatiotemporal forecast of significant wave height (SWH) at a 0.1-degree resolution over 72-h lead-time in the Bohai Sea, Yellow Sea, and East China Sea. In this study, both historical and lead-time wind fields are taken from the ERA5 reanalysis; therefore, the reported skill reflects a reanalysis-driven (hindcast-style) evaluation that provides an upper-bound estimate under near-perfect wind forcing. The SwinLSTM architecture effectively captures spatial dependencies, simultaneously extracting both long-term and short-term spatiotemporal dependencies in ocean wave dynamics for efficient two-dimensional spatial forecasting. Through sensitivity experiments, the optimal configuration was determined, with historical wind, SWH, topography, and ERA5 reanalysis future wind (used here as a proxy forcing for lead-time prediction) identified as the optimal input combinations using a 6-h encoding time step. Based on comprehensive model evaluation with this optimal configuration, our results demonstrate that for forecast horizons of 1-, 6-, 12-, 24-, 48-, and 72-h, the spatially averaged root mean square error (RMSE) values are 0.113, 0.121, 0.155, 0.190, 0.221, and 0.232 m, respectively, with corresponding spatial correlation coefficients (CC) of 0.989, 0.987, 0.980, 0.972, 0.963, and 0.960. For forecast lead times longer than 12-h, comparisons show that our model is among the best ones in AI-based wave models, showing high prediction accuracy while maintaining satisfactory stability and robustness across different temporal scales. The wave forecast capability and robustness were validated under conditions of cold air outbreaks and typhoon events, demonstrating the model's ability to capture the spatial distribution and temporal evolution of extreme wave events. These findings demonstrate the potential for high-resolution SWH forecasting with enhanced accuracy and efficiency.

准确的海浪预报对海上安全至关重要，为沿海作业和规划提供了重要的科学指导。大多数基于人工智能的波浪预测模型都是在粗分辨率下进行的，例如0.25°或0.5°的空间分辨率，并且很难在较长时间内保持较高的预测精度。在此，我们介绍了Swin变压器- lstm耦合网络（SwinLSTM），这是一个混合架构，旨在对渤海、黄海和东海的有效波高（SWH）进行提前72 h的0.1度分辨率的时空预报。在本研究中，历史风场和提前期风场均取自ERA5再分析；因此，报告的技能反映了再分析驱动的（后验式）评估，在接近完美的风强迫下提供了上限估计。SwinLSTM架构有效捕获空间依赖关系，同时提取海浪动力学中的长期和短期时空依赖关系，以实现有效的二维空间预测。通过灵敏度实验，确定了最优配置，以历史风、SWH、地形和ERA5再分析未来风（这里用作提前期预测的代理强迫）为最优输入组合，使用6小时编码时间步长。结果表明：1、6、12、24、48、72 h预测层位的空间平均均方根误差（RMSE）分别为0.113、0.121、0.155、0.190、0.221、0.232 m，空间相关系数（CC）分别为0.989、0.987、0.980、0.972、0.963、0.960。在预测提前期大于12 h的情况下，我们的模型在基于人工智能的波浪模型中名列前茅，具有较高的预测精度，同时在不同时间尺度上保持了令人满意的稳定性和鲁棒性。在冷空气爆发和台风事件的条件下，验证了模型的海浪预报能力和稳健性，证明了模型能够捕捉极端海浪事件的空间分布和时间演变。这些发现表明，高分辨率SWH预报具有提高准确性和效率的潜力。

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引用次数: 0

Indigenous fishponds are sediment traps for terrigenous sediment on the southern coast of Moloka'i, Hawaii 在夏威夷的莫洛卡岛南部海岸，当地的鱼塘是沉积沉积物的陷阱

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-13 DOI: 10.1016/j.seares.2026.102671

Tavailau Tauala Segi , Richard A. Gill

Terrigenous sediment transport is a major driver of coastal degradation in high-island tropical systems, where steep volcanic watersheds rapidly deliver sediment to the nearshore littoral zone. Indigenous Hawaiian fishponds are engineered coastal embankments with sluice structures that retain land-derived sediments and limit their dispersal across reef platforms. This study quantified the distribution of terrigenous sediment within and adjacent to coastal fishponds along the south-central shore of Moloka'i, Hawaii, using grain-size analysis and elemental composition. We also assessed whether fishpond wall restoration influences sediment retention and whether coastal drainage channels affect spatial sediment patterns across the inner littoral zone. Our results show that fishponds retain significantly higher proportions of clay, fine silt, and land-derived trace elements compared to adjacent open coastal flats, confirming their role as effective sediment traps. While restoration status influences elemental accumulation associated with embankment structure and hydrological connectivity, it does not significantly affect particle-size distribution. Spatial patterns of terrigenous sediment across the inner littoral zone were more strongly associated with proximity to watershed outlets than with fishpond condition. These findings demonstrate that traditional coastal embankments can meaningfully modulate watershed-to-coastal sediment fluxes, highlighting their relevance to contemporary sediment-mitigation and coastal-management strategies in Pacific Island ecosystems.

陆源沉积物运输是高岛屿热带系统海岸退化的主要驱动因素，在那里陡峭的火山流域迅速将沉积物运送到近岸沿岸地区。夏威夷本土的鱼塘被设计成带有水闸结构的海岸堤防，可以保留陆地沉积物，并限制它们在珊瑚礁平台上的扩散。本研究利用粒度分析和元素组成对夏威夷莫洛卡岛中南部海岸鱼塘内及其附近的陆源沉积物的分布进行了量化。我们还评估了鱼塘墙修复是否会影响泥沙潴留，以及沿海排水渠道是否会影响内沿海地带的空间泥沙格局。我们的研究结果表明，与邻近的开阔海岸滩地相比，鱼塘保留了更高比例的粘土、细粉土和陆地来源的微量元素，证实了它们作为有效沉积物捕集器的作用。虽然修复状态影响与路堤结构和水文连通性相关的元素积累，但对粒径分布的影响不显著。内滨带陆源沉积物的空间格局与流域出水口的接近程度的关系大于与鱼塘条件的关系。这些发现表明，传统的沿海堤防可以有效地调节流域到沿海的沉积物通量，突出了它们与太平洋岛屿生态系统中当代沉积物缓解和海岸管理战略的相关性。

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引用次数: 0

Monitoring nitrogen pollution using isotopic composition of macrophytes in oligotrophic tropical coastal areas: A short review 利用低营养热带沿海地区大型植物同位素组成监测氮污染：综述

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-08 DOI: 10.1016/j.seares.2026.102669

Hanna-May Malahel , Charlotte R. Dromard , Isabelle Mussio , Pascal Claquin

This review explores the application of nitrogen stable isotopes measurements as a tool for monitoring nitrogen inputs in coastal zones, focusing on oligotrophic tropical ecosystems. Pulsed nutrient enrichment leads to the proliferation of macroalgae, compromising the health of coral reefs and seagrass beds. Through the analysis of 52 studies, we compile isotopic signatures measured in macroalgae and seagrass, while proposing reference thresholds to identify nitrogen pollution sources in tropical areas. By standardizing these isotopic compositions, our review aims to provide useful benchmarks for researchers and managers of coastal ecosystems. The main pollution sources identified include wastewater, groundwater, aquaculture, and fertilizers, each characterized by distinct δ¹⁵N ranges. Among these, wastewater and sewage show the highest isotopic values (>10 ‰), while inorganic fertilizers exhibit the lowest (down to −4.5 ‰). Macroalgae, particularly Dictyota and Rhodophyta species (e.g. Laurencia), were most frequently used as bioindicators due to their wide distribution and responsiveness to nutrient variation. Thalassia testudinum emerged as the most commonly used seagrass species across studies. However, seagrasses overall were less frequently employed than macroalgae, and typically displayed less sensitivity to nitrogen enrichment in their isotopic signatures. The review highlights practical aspects of isotopic monitoring, including macrophyte selection, caging techniques, sample preparation, and environmental variables affecting interpretation such as seasonality, depth, and hydrodynamic conditions. Caging, though underused in seagrass studies, proved essential in areas lacking native bioindicators. Finally, we provide recommendations for future studies to enhance consistency and standardization allowing temporal and intersites comparisons. This approach offers a cost-effective and sensitive tool for detecting nutrient inputs in vulnerable tropical ecosystems.

本文综述了氮稳定同位素测量作为监测沿海地区氮输入的工具的应用，重点是少营养热带生态系统。脉冲式养分富集导致大型藻类的增殖，危及珊瑚礁和海草床的健康。通过对52项研究的分析，我们编制了大型藻类和海草的同位素特征，同时提出了识别热带地区氮污染源的参考阈值。通过标准化这些同位素组成，我们的综述旨在为沿海生态系统的研究人员和管理者提供有用的基准。确定的主要污染源包括废水、地下水、水产养殖和肥料，每个污染源都有不同的δ15N范围。其中，废水和污水的同位素值最高（≤10‰），无机肥料的同位素值最低（≤- 4.5‰）。大型藻类，特别是Dictyota和Rhodophyta物种（例如Laurencia），由于其广泛分布和对营养变化的反应性，最常被用作生物指标。在所有研究中，海草是最常用的海草物种。然而，总体而言，海草的使用频率低于大型藻类，并且在其同位素特征中对氮富集的敏感性通常较低。这篇综述强调了同位素监测的实际方面，包括大型植物的选择、笼化技术、样品制备以及影响解释的环境变量，如季节性、深度和水动力条件。笼化虽然在海草研究中未得到充分利用，但在缺乏本地生物指标的地区被证明是必不可少的。最后，我们对未来的研究提出了建议，以加强一致性和标准化，允许时间和地点间的比较。这种方法为检测脆弱的热带生态系统中的营养投入提供了一种经济有效且敏感的工具。

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引用次数: 0

CatBoost-based prediction of suspended sediment concentration in the Pearl River estuary: Driving mechanisms unraveled via SHAP analysis 基于catboost的珠江口悬沙浓度预测：通过SHAP分析揭示驱动机制

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-07 DOI: 10.1016/j.seares.2026.102668

Xiaofei Cheng , Yunzhi Chen , Yang Zhang , Wei Xie , Liang Du , Dan Wu , Rui Xiao , Guoxuan Ji

This study focuses on predicting suspended sediment concentration (SSC) and analyzing its influencing factors in the Pearl River Estuary (Zhuhai, China) using in-situ hydrological data collected from October 2022 to May 2023. Nine mainstream machine learning models were compared, with the Categorical Boosting (CatBoost) model identified as the optimal for SSC prediction. CatBoost achieved high accuracy, with a Pearson Correlation Coefficient (R) of 0.76, Root Mean Squared Error (RMSE) of 3.76 mg/L, Mean Absolute Error (MAE) of 2.47 mg/L, Median Absolute Error (MedAE) of 2.04 mg/L, and Mean Squared Logarithmic Error (MSLE) of 0.198 mg/L, outperforming models such as Light Gradient Boosting Machine (LGBM), Ramdom Forest (RF), and Extreme Gradient Boosting (XGBoost). Stratified analysis showed it performed well for low-to-medium SSC (≤30 mg/L) but had limited accuracy for high SSC (>30 mg/L). SHapley Additive exPlanations (SHAP) analysis revealed that significant wave height (Hs) and surface current speed (SCS) were the dominant drivers, with Hs exerting the most substantial influence. Both factors exhibited a pronounced positive regulatory effect on SSC. Further tests on variable combinations indicated that the simplified input mode (Hs + SCS) alone was sufficient to achieve accurate SSC predictions, with no significant improvement from adding more variables. This study demonstrates the effectiveness of CatBoost in SSC prediction and highlights key influencing factors via SHAP, providing a robust framework for precise SSC forecasting in estuarine environments.

利用2022年10月至2023年5月的珠江口现场水文资料，对珠江口悬浮物浓度（SSC）进行预测并分析其影响因素。比较了9种主流机器学习模型，其中CatBoost模型被认为是SSC预测的最佳模型。CatBoost具有较高的准确性，Pearson相关系数(R)为0.76，均方根误差（RMSE）为3.76 mg/L，平均绝对误差（MAE）为2.47 mg/L，中位数绝对误差（MedAE）为2.04 mg/L，均方对数误差（MSLE）为0.198 mg/L，优于光梯度增强机（LGBM）、随机森林（RF）和极端梯度增强（XGBoost）等模型。分层分析表明，该方法对低至中等SSC（≤30 mg/L）检测效果良好，但对高SSC（≤30 mg/L）检测精度有限。SHapley加性解释（SHAP）分析表明，显著波高（Hs）和表面流速度（SCS）是主要驱动因素，其中Hs的影响最大。这两个因子对SSC均有显著的正向调节作用。对变量组合的进一步测试表明，简化的输入模式（Hs + SCS）本身就足以实现准确的SSC预测，增加更多的变量并没有显著的改善。本研究验证了CatBoost在海温预报中的有效性，并通过SHAP强调了海温预报的关键影响因素，为河口海温的精确预报提供了一个强有力的框架。

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引用次数: 0

Numerical study of nutrient responses to environmental factors in complex river-estuary interactions 江口复杂相互作用中营养物质对环境因子响应的数值研究

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-01 DOI: 10.1016/j.seares.2025.102664

Yuling Liu , Zhikun Song , Mingliang Zhang

A three-dimensional hydrodynamic and ecological model was constructed to understand the spatiotemporal distributions of nutrients and their dynamic responses to environmental factors in the Liao River Estuary (LRE) and Daliao River Estuary (DLRE). The simulated results were validated using observed data, demonstrating high simulation accuracy. Nitrogen nutrient concentrations were highest in spring and summer of 2023, while dissolved inorganic phosphorus (DIP) concentrations and Chlorophyll-a (Chl-a) were highest in summer. Under scenarios of reduced nutrient loads by 10 %–30 %, the dissolved inorganic nitrogen (DIN) concentrations at selected stations decreased by 5.2 %–9.8 % and 14 %–29 %, respectively, while the DIP concentrations decreased by 2.8 %–8 % and 8.4 %–24.4 %. A 20 % discharge increase resulted in reductions of 6.61 % and 6.56 % in DIN and DIP concentrations during summer flood season, respectively. The reclamation for construction promoted the advection and diffusion of pollutants from the LRE into the sea but weakened the migration of pollutants in the DLRE. The study insights can enhance our understanding of estuarine water quality processes and provide valuable guidance for pollutant control strategies.

为了解辽河口和大辽河口营养物的时空分布及其对环境因子的动态响应，建立了辽河口和大辽河口营养物的三维水动力生态模型。利用实测数据对模拟结果进行了验证，显示出较高的模拟精度。2023年春、夏季氮养分浓度最高，夏季溶解无机磷（DIP）和叶绿素a （Chl-a）浓度最高。在养分负荷减少10% ~ 30%的情况下，各试验站溶解无机氮（DIN）浓度分别下降5.2% ~ 9.8%和14% ~ 29%，DIP浓度分别下降2.8% ~ 8%和8.4% ~ 24.4%。夏季汛期，流量增加20%，DIN和DIP浓度分别下降6.61%和6.56%。填海造地促进了LRE污染物向海的平流扩散，但减弱了污染物向DLRE的迁移。研究结果可以提高我们对河口水质过程的认识，并为污染物控制策略提供有价值的指导。

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引用次数: 0

Revealing coastal resilience in China: Spatiotemporal dynamics, regional inequality, and structural drivers 揭示中国沿海弹性：时空动态、区域不平等和结构驱动因素

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-01 DOI: 10.1016/j.seares.2025.102663

Shiye Yi , Yongsheng Wang , Zhijian Yu , Xiaohua Yu

Enhancing the resilience of coastal cities is a global priority, yet the spatiotemporal dynamics, inequalities, and drivers of resilience at the city level remain poorly understood. This study investigates these issues across 54 Chinese coastal cities from 2012 to 2022. Using an integrated framework that includes spatial statistics, inequality decomposition, and interpretable machine learning, we analyze a multi-dimensional resilience index. Results show that while overall resilience has increased, spatial polarization between advanced and peripheral cities has intensified, driven primarily by intra-regional disparities. Crucially, we identify green production as the primary structural driver of resilience, surpassing the importance of traditional economic indicators. We also find strong evidence of positive spatial spillovers, demonstrating that a city's resilience is significantly influenced by its neighbors. These findings challenge conventional economic-centric resilience models and indicate that future policy must prioritize ecological governance and coordinated regional planning to achieve equitable and sustainable coastal development.

加强沿海城市的韧性是全球的优先事项，但对城市层面韧性的时空动态、不平等和驱动因素仍知之甚少。本研究调查了2012年至2022年中国54个沿海城市的这些问题。利用空间统计、不等式分解和可解释性机器学习的集成框架，我们分析了一个多维弹性指数。结果表明，虽然总体韧性有所增强，但发达城市和外围城市之间的空间极化加剧，这主要是由区域内差异驱动的。至关重要的是，我们认为绿色生产是韧性的主要结构性驱动因素，其重要性超过了传统经济指标。我们还发现了积极的空间溢出效应的有力证据，表明城市的弹性受到其邻居的显著影响。这些发现挑战了传统的以经济为中心的弹性模型，并表明未来的政策必须优先考虑生态治理和协调的区域规划，以实现公平和可持续的沿海发展。

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引用次数: 0

Habitat differences and vertical migration patterns of mesopelagic fish: A case study on the trophic niche of Chauliodus sloani in cold seep-adjacent waters 中上层鱼类的生境差异及垂直迁移模式——以邻近冷渗水域的sloani Chauliodus营养生态位为例

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-01 DOI: 10.1016/j.seares.2025.102662

Juan Shi , Xiaolan Kong , Teng Wang , Chunhou Li , Jinfa Zhao , Yayuan Xiao , Yu Liu , Yancong Cai , Xuefu Ao , Yan'e Jiang , Hongyu Xie , Jinhui Sun , Yong Liu , Xiaoyu Song , Yanqiao Wang , Junyun Liu

The adaptive strategies of species to differentiated habitats represent a universal ecological principle. This study takes Chauliodus sloani, a dominant mesopelagic fish in cold seep-adjacent waters, as a model to explore the adaptive patterns of its trophic niche in differentiated habitats. In August 2023, C. sloani samples were collected at different depths (75–750 m) and regions (cold seep and non-cold seep areas). Stable carbon and nitrogen isotope techniques were employed to characterize their trophic niche attributes. Results indicated that the δ¹³C value of C. sloani in cold seep-adjacent waters was −19.29 ± 0.31 ‰, δ¹⁵N was 9.83 ± 0.53 ‰, and the trophic level was 3.37 ± 0.68. Trophic indicators including carbon isotope range (CR), nitrogen isotope range (NR), mean centroid distance (CD), mean nearest neighbor distance (MNND), and standard deviation of MNND (SDNND) were higher in non-cold seep areas than in cold seep areas at the same water depth. This supports that C. sloani in cold seep areas exhibit lower dietary diversity but higher redundancy and evenness, endowing populations with stronger anti-disturbance capabilities. The directional changes in trophic structures further validated this result, confirming more stable trophic structures in cold seep populations. At 750 m depth, C. sloani exhibited minimal overlap in core trophic niche (SEAc) with other depths, demonstrating significant niche differentiation and independent population establishment at the strata. Zooplankton constituted the primary food source of C. sloani, but the contribution ratio of food sources varied significantly with depth. The contribution ratio of cephalopod prey increased with increasing water depth. This research elucidates both the adaptive strategies of C. sloani trophic niches across heterogeneous habitats and verifies distinctive diel vertical migration behaviors in mesopelagic fishes, offering novel insights into deep-sea organism survival mechanisms within complex ecosystems and associated energy transfer pathways.

物种对不同生境的适应策略是一个普遍的生态学原理。本研究以寒渗区中上层优势鱼类sloani Chauliodus为研究对象，探讨其营养生态位在不同生境中的适应模式。2023年8月，在不同深度（75 ~ 750 m）和不同区域（冷渗区和非冷渗区）采集了C. sloani样品。采用稳定碳氮同位素技术对其营养生态位属性进行了表征。结果表明：邻近冷渗水体中sloani的δ13C值为- 19.29±0.31‰，δ15N值为9.83±0.53‰，营养等级为3.37±0.68。相同水深下，非冷渗区碳同位素范围（CR）、氮同位素范围（NR）、平均质心距离（CD）、平均最近邻距离（MNND）和MNND标准差（SDNND）等营养指标均高于冷渗区。这说明，在寒冷地区，食源多样性较低，但具有较高的冗余性和均匀性，种群具有较强的抗干扰能力。营养结构的方向性变化进一步验证了这一结果，证实了冷渗种群中更稳定的营养结构。在750 m深度处，石竹的核心营养生态位（SEAc）与其他深度的重叠最小，表现出明显的生态位分化和独立的种群建立。浮游动物是梭鲈的主要食物来源，但食物来源的贡献比例随深度变化显著。头足类猎物的贡献率随着水深的增加而增加。本研究阐明了sloani营养生态位在异质生境中的适应策略，并验证了中上层鱼类独特的垂直迁移行为，为复杂生态系统中深海生物的生存机制和相关能量转移途径提供了新的见解。

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引用次数: 0

Strength and duration of diel pH and dissolved oxygen cycles control the survival and performance of early life stage North Atlantic bivalves (Mercenaria mercenaria, Crassostrea virginica, Argopecten irradians and Mytilus edulis) 水体pH和溶解氧循环的强度和持续时间控制着北大西洋双壳类（雇佣兵、珍珠贝、Argopecten irradians和Mytilus edulis）生命早期阶段的生存和性能。

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2026-01-01 DOI: 10.1016/j.seares.2025.102661

Jeffrey Kraemer, Christopher J. Gobler

Many economically important bivalves spawn during the summer months when diel cycles of dissolved oxygen (DO) and pH occur in estuaries. Little is known, however, regarding how cycles of differing durations and magnitudes affect these organisms. Here, larval bivalves (Mercenaria mercenaria, Crassostrea virginica, Argopecten irradians) and juvenile mussels (Mytilus edulis) were exposed to cycles of low DO and pH of varying duration (4-, 6-, 8-, and 12-h) and strength (moderate: DO range ∼ 6 mg L⁻¹, pH range ∼ 0.6 and severe: DO range ∼ 10 mg L⁻¹, pH range ∼ 0.9) compared to positive (normoxic and normocapnic) and negative (hypoxic and acidified) static controls. Growth, survival, respiration and clearance rates were measured. During experiments, 12 h of nocturnal hypoxia and acidification coupled with mildly hyperoxic (∼11.3 mg L⁻¹ DO) and hypocapnic (∼8.13 pH) conditions by day significantly reduced survival in larval C. virginica, M. mercenaria, and A. irradians in all experiments (p < 0.05), while 12 h of nocturnal hypoxia and acidification without hyperoxic and hypocapnic conditions did so in only half of experiments indicating that hyperoxia and hypocapnia were additional and significant stressors. Six hours of low DO/pH significantly reduced survival in only 16 % of experiments, indicating that larval bivalves are more impacted by longer duration and greater magnitude cycles of DO and pH compared to cycles of shorter duration or lower magnitude. Across species, M. mercenaria larvae were more resilient to nocturnal hypoxia and acidification than A. irradians and C. virginica. The growth and survival of juvenile M. edulis were unaffected by nocturnal hypoxia and acidification but mussels experienced significantly increased clearance and respiration rates under these conditions (p < 0.01) evidencing physiological mechanisms for coping with these stressors. Collectively, this study demonstrates that the impacts of diel DO and pH cycles on early life stage bivalves are dependent upon cycle duration, cycle intensity, bivalve life stage, and bivalve species.

许多经济上重要的双壳类在夏季产卵，此时河口溶解氧（DO）和pH值发生了昼夜循环。然而，关于不同持续时间和强度的周期如何影响这些生物体，我们知之甚少。本研究中，将双壳类幼体（鳉鱼、珍珠贝、珍珠贝）和贻贝幼体（Mytilus edulis）暴露于不同持续时间（4、6、8和12小时）和强度（中度：DO范围~ 6 mg L−1，pH范围~ 0.6和重度：DO范围~ 10 mg L−1，pH范围~ 0.9）的低DO和pH循环中，与阳性（正氧和正氧）和阴性（缺氧和酸化）静态对照进行比较。测量生长、存活、呼吸和清除率。在实验中，12小时的夜间缺氧和酸化加上白天轻度高氧（~ 11.3 mg L−1 DO）和低碳酸血症（~ 8.13 pH）的条件，在所有实验中都显著降低了virginica、M. mercenaria和A. irradians的存活率（p < 0.05），而12小时的夜间缺氧和酸化没有高氧和低碳酸血症的情况下，只有一半的实验降低了存活率，这表明高氧和低碳酸血症是额外的和重要的应激源。在只有16%的实验中，6小时的低DO/pH显著降低了存活率，这表明与较短时间或较低强度的周期相比，较长时间和较大幅度的DO和pH周期对双壳类幼虫的影响更大。在不同的物种中，雇佣兵蒿的幼虫对夜间缺氧和酸化的适应能力强于伊尔达蒿和锦绣蒿。夜间缺氧和酸化对毛竹蚌幼鱼的生长和存活没有影响，但在这些条件下，贻贝的清除率和呼吸速率显著增加（p < 0.01），证明了应对这些应激源的生理机制。总之，本研究表明，水体DO和pH循环对双壳动物早期生命阶段的影响取决于周期持续时间、周期强度、双壳动物生命阶段和双壳动物种类。

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引用次数: 0

Research on the impact of marine financial support on economic resilience and sustainable development in coastal areas 海洋金融支持对沿海地区经济弹性和可持续发展的影响研究

IF 2.9 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research

Pub Date : 2025-12-31 DOI: 10.1016/j.seares.2025.102665

Shenglin Zhou , Zhicheng Wan , Xinwei Li

Marine financial support, as an important means of optimizing resource allocation and risk protection in coastal areas, provides key support for enhancing economic resilience and achieving sustainable development. This paper constructs the Marine financial support index based on panel data of 11 coastal provinces in China from 2011 to 2023, and uses fixed effects, instrumental variables and threshold models to systematically evaluate its economic and ecological effects. The study found that Marine financial support significantly enhanced the economic resilience and sustainable development level of coastal regions, and its promoting effect was achieved through the optimization of capital factor allocation and the improvement of green innovation capacity, and showed obvious nonlinear threshold characteristics. Heterogeneity analysis shows that after the release of the maritime power strategy, the function of Marine finance has shifted from scale expansion to quality improvement, and its role is more prominent in regions with a better economic foundation, moderate environmental regulations and southern coastal areas. This paper provides empirical evidence and policy references for optimizing the allocation of Marine financial resources and enhancing the resilience and green transformation capacity of coastal systems.

海洋金融支持是沿海地区优化资源配置和风险防范的重要手段，是增强经济韧性、实现可持续发展的重要支撑。本文基于2011 - 2023年中国11个沿海省份的面板数据构建了海洋金融支持指数，并运用固定效应、工具变量和阈值模型对其经济和生态效应进行了系统评价。研究发现，海洋金融支持显著提升了沿海地区的经济弹性和可持续发展水平，其促进作用是通过优化资本要素配置和提高绿色创新能力实现的，并表现出明显的非线性阈值特征。异质性分析表明，海洋强国战略发布后，海洋金融的功能由规模扩张转向质量提升，在经济基础较好、环境规制温和的地区和南部沿海地区作用更为突出。本文为优化海洋金融资源配置，增强沿海系统弹性和绿色转型能力提供了经验证据和政策参考。

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引用次数: 0