Marine environmental research最新文献_第8页

Zooplankton trophic dynamics in response to upwelling phases in the eastern arabian sea: Insights from stable isotopes 东阿拉伯海浮游动物营养动力学对上升流阶段的响应：来自稳定同位素的见解。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-07 DOI: 10.1016/j.marenvres.2026.107838

Prachi Marathe , Anil Kumar Vijayan , B. Bikram Reddy , C.K. Sherin , V. Sudheesh

The study investigated the influence of upwelling-driven changes in physicochemical conditions and phytoplankton structure on the carbon (δ¹³C) and nitrogen (δ¹⁵N) stable isotope composition of particulate organic matter (POM) and major zooplankton groups (crustaceans, chaetognaths, and fish larvae) in the eastern Arabian Sea (EAS) during the 2018 summer monsoon (SM). Enhanced upwelling in the early and peak phases stimulated diatom-dominated blooms (73–91 %) resulting in elevated Chla concentrations (1.39 ± 1.09 and 3.94 ± 3.38 μg L⁻¹). In contrast late-phase upwelling conditions were characterised by a deeper nitracline, leading to a shift towards smaller phytoplankton and dinoflagellates. The δ¹³C of POM (−21.8 ± 1.9 ‰) remained relatively enriched throughout, reflecting a sustained contribution from micro-phytoplankton. In contrast, δ¹⁵N of POM increased during late-monsoon (9.0 ± 2.5 ‰), consistent with nitrogen loss processes under low-oxygen conditions. Zooplankton δ¹³C and δ¹⁵N values exhibited similar phase-dependent pattern, indicating strong coupling with POM. Group-level isotopic signatures and trophic positions (TPs) revealed distinct feeding strategies: crustaceans exhibited herbivorous diets and lower TPs, whereas chaetognaths, and fish larvae occupied higher TPs indicative of carnivory. These findings underscore the dominant role of micro-phytoplankton (diatoms and dinoflagellates) in sustaining a shorter, classical food-chain during upwelling. This study provides the first regional-scale isotopic baseline for the EAS SM, with implications for isoscape development and trophodynamic modelling.

研究了2018年夏季风（SM）期间，上升流驱动的物理化学条件和浮游植物结构变化对阿拉伯海东部（EAS）颗粒有机质（POM）碳（δ13C）和氮（δ15N）稳定同位素组成以及主要浮游动物类群（甲壳类、毛齿类和鱼类幼虫）的影响。早期和高峰期的上升流增强刺激硅藻为主的水华（73- 91%），导致Chla浓度升高（1.39±1.09和3.94±3.38 μg L-1）。相反，后期上升流条件的特点是较深的硝酸碱，导致转向较小的浮游植物和鞭毛藻。POM的δ13C（-21.8±1.9‰）始终保持相对富集，反映了微浮游植物的持续贡献。晚季风期POM δ15N增加（9.0±2.5‰），与低氧条件下的氮损失过程一致。浮游动物δ13C和δ15N值表现出相似的相位依赖模式，与POM具有较强的耦合关系。群水平的同位素特征和营养位置（TPs）揭示了不同的摄食策略：甲壳类动物表现出草食性饮食和较低的TPs，而毛齿动物和鱼类幼虫则表现出较高的TPs，表明食肉性。这些发现强调了微型浮游植物（硅藻和鞭毛藻）在上升流期间维持较短的经典食物链中的主导作用。本研究提供了首个东亚区域尺度的同位素基线，对等值线图发展和滋养动力学建模具有重要意义。

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引用次数: 0

A novel split aptamer–gold nanoparticle colorimetric assay for the rapid detection of Phaeocystis globosa 一种新的快速检测球形褐囊藻的分离适配体-金纳米颗粒比色法

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-07 DOI: 10.1016/j.marenvres.2026.107835

Xueyang Tian, Qianyu Liu, Siqi Cheng, Wenqing Chen, Chunyun Zhang, Yuanyuan Wang, Changlu Guo, Guofu Chen

Phaeocystis globosa-forming blooms pose serious ecological and economic risks by releasing hemolytic toxins, inducing hypoxia, threatening fisheries, and even obstructing seawater intake in nuclear power plants. Rapid and reliable detection of this alga is therefore critical. Here, a rapid, sensitive, and quantitative visual detection method that is referred to as split aptamer–gold nanoparticle colorimetric assay (SAGCA) was established for P. globosa. For this purpose, a parent aptamer (PAP) (Pg-TA1) against P. globosa was first split into two segments (Pg-SP1 and Pg-SP2) followed by analyzing their synergistic binding efficiency. The results demonstrated that neither Pg-SP1 nor Pg-SP2 alone could recognize target cells. By contrast, Pg-SP1 and Pg-SP2 restored the binding ability comparable to the PAP when they were combined. Subsequently, the binding conditions of the split aptamers were optimized, and a SAGCA detection system based on the split aptamers was established. The detection limit of SAGCA was 2 cells mL⁻¹, with a linear range of 1 × 10¹ cells mL⁻¹–1 × 10⁸ cells mL⁻¹ (R² = 0.965). SAGCA demonstrated good specificity and strong anti-interference effectiveness. The quantification results of SAGCA were substantially consistent with those from microscopic examination. SAGCA may be used as a good alternative to the microscopy-based detection method for P. globosa, and thus offers an efficient, low-cost way for monitoring other hazardous microalgae.

球形褐囊藻形成的水华释放溶血性毒素，引起缺氧，威胁渔业，甚至阻碍核电站的海水入口，造成严重的生态和经济风险。因此，快速可靠地检测这种藻类是至关重要的。本文建立了一种快速、灵敏、定量的视觉检测方法，即分割适体金纳米颗粒比色法（SAGCA）。为此，我们首先将一种抗球形棘球绦虫的亲本适体（PAP）（Pg-TA1）拆分为两个片段（Pg-SP1和Pg-SP2），然后分析它们的协同结合效率。结果表明，Pg-SP1和Pg-SP2均不能单独识别靶细胞。相比之下，Pg-SP1和Pg-SP2结合后恢复的结合能力与PAP相当。随后，对裂解适配体的结合条件进行优化，建立了基于裂解适配体的SAGCA检测系统。SAGCA的检出限为2个细胞mL−1，线性范围为1 × 101个细胞mL−1 - 1 × 108个细胞mL−1 （R2 = 0.965）。SAGCA具有良好的特异性和较强的抗干扰能力。SAGCA定量结果与镜检结果基本一致。SAGCA可以作为一种很好的替代基于显微镜的检测方法，从而为其他有害微藻的监测提供一种高效、低成本的方法。

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引用次数: 0

Impact of Holocene marine transgression and climatic changes on the Moros marsh (western Mediterranean, Spain) 全新世海侵和气候变化对西班牙西地中海Moros沼泽的影响。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-07 DOI: 10.1016/j.marenvres.2026.107832

A.M. Blázquez , A. Rodríguez-Pérez , J. Caicedo-Rodríguez , I. Montoya-Blázquez , J. Guillem

Coastal wetlands are the most common environments in the Spanish Mediterranean. They provide valuable information about past interactions between sea level fluctuations, climate variability and sediment dynamics, which could enable us to predict the future response of coastal systems to global climate change.

This study analyses the palaeoenvironmental evolution of the Moros Marsh (Western Mediterranean) during the Holocene, with the aim of assessing the impact of the MIS 1 marine transgression and climate change on the configuration of the wetland during this period. To achieve this goal, 347 samples extracted from four boreholes were studied from a sedimentological, micropalaeontological and chronological perspective.

The results show a thick alluvial unit at the base of all the boreholes, dated as Middle Holocene, on which brackish marsh facies developed, which later became freshwater. A barrier facies has been detected in the most coastal borehole (Moro 2), with a maximum Holocene transgression (MIS 1) dated around 5200 cal yr BP. The first flooding evidence appears in the innermost borehole (Moro 1) around 3562-3440 cal yr BP and continues to the present day, with episodes of oscillation in the water table related to climatic changes in the Northern Hemisphere. A low-salinity, low-energy environment is determined, with little marine influence and a powerful supply of fresh water from the aquifer.

This environment is the result of the interaction between eustatic and climatic factors. The former account for the formation of the lagoon system, and the latter are the main controllers of its subsequent evolution.

沿海湿地是西班牙地中海最常见的环境。它们提供了有关海平面波动、气候变率和沉积物动态之间过去相互作用的宝贵信息，使我们能够预测未来沿海系统对全球气候变化的反应。本文分析了西地中海莫罗斯沼泽（Moros Marsh）全新世的古环境演变，探讨了MIS 1海侵和气候变化对该时期湿地形态的影响。为了实现这一目标，从四个钻孔中提取的347个样本从沉积学、微古生物学和年代学的角度进行了研究。结果表明，在所有钻孔的底部都有一个厚的冲积单元，其年代为中全新世，在此基础上发育了咸淡沼泽相，后来变成了淡水。在大多数沿海钻孔（Moro 2）中发现了屏障相，最大的全新世海侵（MIS 1）约为5200 calyr BP。第一个洪水证据出现在最深处的钻孔（Moro 1），大约3562-3440 calyr BP，并持续到今天，与北半球气候变化有关的地下水位振荡事件。确定了一个低盐度、低能量的环境，几乎没有海洋影响，有来自含水层的大量淡水供应。这种环境是海平面上升和气候因素相互作用的结果。前者是泻湖体系形成的原因，后者是其后续演化的主要控制因素。

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引用次数: 0

Quantification of marine cooling effect and driving mechanism along Beibu Gulf coastal areas 北部湾沿岸海洋降温效应量化及驱动机制

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-06 DOI: 10.1016/j.marenvres.2026.107836

Zhengyu Qin , Zuofang Yao , Yuanle Pan , Fei Yang

Global warming and urbanization have greatly intensified the heat threats to urban residents. Marine cooling effect (MCE) is essential for mitigating urban heat threats in coastal cities, yet there is still big gap of understanding its seasonal dynamics and underlying drivers in subtropical nearshore zones. Taking the Guangxi Beibu Gulf as a case, this study combined multi-temporal Landsat 8 land surface temperature datasets with Spearman correlation, local spatial autocorrelation (LISA), and optimal-parameter geographical detector (OPGD) analyses to quantify MCE, which is indicated by marine cooling intensity (MCI) and marine cooling distance (MCD), and to dissect their spatiotemporal heterogeneity and driving mechanisms. Results reveal distinct seasonal changes regimes. MCI peaked in summer (up to 23.75 °C) and was lowest in autumn, while MCD reached its maximum inland extent in spring (750m). High intensity cooling consistently clustered around coastal port areas and dense gray-space urban core zones, whereas blue-space and green-space-rich zones exhibited weaker cooling. Gray space exerted a persistent positive influence on MCI across seasons (summer q > 0.55), while blue space extended MCD only in spring and green space generally shortened it. Landscape fragmentation (ED, LSI) weakened cooling in most seasons, underscoring the role of spatial continuity in facilitating MCE. Driver interactions varied by season. Blue-gray synergy produced the strongest nonlinear enhancement of MCI year-round (q > 0.60), indicating that mixed land-water configurations sharpen cooling contrasts at the land-sea interface. MCD propagation was governed in spring by blue-building coupling interactions (AI_BS × ABH, q = 0.34), in summer by gray-green coupling interactions (AI_IS × LPI_GS, q = 0.26), and in autumn by more and weaker balanced multi-factor effects. These findings highlight the seasonal shifts in how gray, blue, and green spaces individually and interactively regulate coastal thermal environments. The framework provides transferable metrics for diagnosing and optimizing blue-green-gray spatial patterns in climate adaptive coastal urban planning, with potential to maximize cooling benefits for densely built port cities in subtropical regions.

全球变暖和城市化极大地加剧了城市居民的热威胁。海洋冷却效应（MCE）对于缓解沿海城市的热威胁至关重要，但对亚热带近岸地区海洋冷却效应的季节性动态及其驱动因素的理解仍存在较大差距。以广西北部湾为例，采用Spearman相关、局部空间自相关（LISA）和最优参数地理探测器（OPGD）等方法，结合Landsat 8多时段陆地温度数据，定量分析了海洋冷却强度（MCI）和海洋冷却距离（MCD）的MCE，并分析了二者的时空异质性及其驱动机制。结果显示明显的季节变化机制。MCI在夏季最高（23.75°C），秋季最低，而MCD在春季内陆范围最大（750m）。高强度降温持续集中在沿海港口地区和密集的灰色空间城市核心区，而蓝色空间和绿色空间丰富的区域则表现出较弱的降温。灰色空间对MCI具有持续的正向影响（夏季q >； 0.55），蓝色空间仅在春季延长MCI，绿色空间普遍缩短MCI。景观破碎化（ED， LSI）在大多数季节削弱了降温，强调了空间连续性对MCE的促进作用。司机之间的互动因季节而异。蓝-灰协同作用对MCI的非线性增强最为强烈（q > 0.60），表明混合陆水配置增强了陆海界面的冷却对比。MCD的繁殖在春季受蓝楼耦合作用（AI_BS × ABH, q = 0.34），夏季受灰绿色耦合作用（AI_IS × LPI_GS, q = 0.26），秋季受多因子平衡作用的支配。这些发现强调了灰色、蓝色和绿色空间如何单独和相互作用地调节沿海热环境的季节变化。该框架为诊断和优化气候适应性沿海城市规划中的蓝-绿-灰空间模式提供了可转移的指标，有可能最大限度地提高亚热带地区人口密集的港口城市的降温效益。

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引用次数: 0

Multi-omics and stable isotopic reveal coordinated carbon-nitrogen metabolic reprogramming sustaining diatom cellular homeostasis under CO2 limitation 多组学和稳定同位素揭示了在CO2限制下维持硅藻细胞内稳态的协调碳氮代谢重编程

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-06 DOI: 10.1016/j.marenvres.2026.107843

Haiyue Chen , Yu Liu , Guoguang Wang , Weijia Fan , Guangzhi Rong , Haixia Wang

Algal blooms frequently trigger CO₂ limitation, under which diatoms not only survive but dominate. However, the cellular metabolic adaptations underlying this ecological phenomenon remain poorly understood. This study systematically investigated the coordinated carbon-nitrogen metabolic response of the typical diatom Skeletonema costatum (S. costatum) to CO₂ limitation (300 ppm, 100 ppm) via stable isotope and multi-omics analysis. CO₂ limitation triggered the carbon concentrating mechanism (CCM) and attenuated nitrogen isotope fractionation, redirecting carbon flux towards amino acid biosynthesis rather than fatty acid biopathway. Integrated transcriptomic and metabolomic profiling revealed that carbon fixation and the tricarboxylic acid (TCA) cycle were activated, while fatty acid synthesis was inhibited. This redirected carbon skeletons from acetyl-CoA into the TCA cycle to support amino acid production. Concurrent upregulation of nitrogen assimilation genes, particularly those involved in glutamine/glutamate synthesis, facilitated ammonium incorporation. The alanine-aspartate-glutamate pathway served as a central hub, integrating carbon skeletons and amino groups to drive amino acid synthesis and maintain cellular homeostasis. These findings systematically delineate the metabolic reprogramming that enables diatoms to adapt to CO₂ limitation, providing key insights into their dominance during algal blooms.

藻华经常引发二氧化碳限制，在这种限制下，硅藻不仅存活，而且占主导地位。然而，这种生态现象背后的细胞代谢适应仍然知之甚少。本研究通过稳定同位素和多组学分析，系统研究了典型硅藻骨藻（S. costatum）对CO2限制（300 ppm和100 ppm）的碳氮协调代谢响应。CO2限制触发了碳浓缩机制（CCM）并减弱了氮同位素分馏，将碳通量转向氨基酸生物合成而不是脂肪酸生物途径。综合转录组学和代谢组学分析显示，碳固定和三羧酸（TCA）循环被激活，而脂肪酸合成被抑制。这将碳骨架从乙酰辅酶a重定向到TCA循环，以支持氨基酸的生产。同时，氮同化基因的上调，特别是那些参与谷氨酰胺/谷氨酸合成的基因，促进了铵的掺入。丙氨酸-天冬氨酸-谷氨酸途径作为中心枢纽，整合碳骨架和氨基，驱动氨基酸合成并维持细胞内稳态。这些发现系统地描述了使硅藻适应二氧化碳限制的代谢重编程，为它们在藻华期间的优势提供了关键见解。

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引用次数: 0

Atmospheric wet deposition acts as a critical pathway for bioavailable dissolved organic carbon in the Haizhou Bay, South Yellow Sea 大气湿沉降是南黄海海州湾生物可利用性溶解有机碳的重要途径

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-05 DOI: 10.1016/j.marenvres.2026.107837

Lei Xie , Ruotong Yan , Wei Fang , Bin Yang , Renming Jia , Dongliang Lu , Bo Yang , Yuru Yan , Jiahu Xia , Jiaodi Zhou , Haifang Huang , Zhenjun Kang

Riverine input and atmospheric wet deposition represent significant external sources of dissolved organic matter (DOM) in coastal waters. However, the transformation and fate of these allochthonous DOM following their entry into the marine environment remain poorly understood. To address this knowledge gap, rainwater samples were collected from the Haizhou Bay (HZB), South Yellow Sea, and riverine samples were obtained from the Linhong River, the largest river discharging into the HZB, during summer 2024. The concentrations of dissolved organic carbon (DOC) and the optical properties of DOM in rainwater and river samples were analyzed. Additionally, microbial incubation experiments were performed to assess the bioavailability of DOM originating from different sources in the HZB. The results indicated that the concentrations of DOC, chromophoric DOM (CDOM), and humic-like fluorescent DOM (FDOM) in the river samples were significantly higher than those in the rainwater samples (P < 0.05). Riverine DOM exhibited greater aromaticity, higher humification levels, and larger molecular weight, whereas rainwater DOM showed opposite characteristics. Furthermore, the proportion of bioavailable DOC (BDOC) in rainwater ranging from 40.18 % to 69.77 % (average 53.93 ± 11.48 %), approximately 7.3 times that in river water (7.36 ± 2.55 %). The estimated wet deposition flux of DOC into the HZB in summer was 1662 tons, significantly lower than the river input flux (18821 tons). In contrast, the wet deposition loading of BDOC (896 tons) in summer reached 64.7 % of the riverine input (1385 tons), suggesting that atmospheric wet deposition constitutes a crucial pathway for BDOC in the HZB.

河流输入和大气湿沉降是沿海水域溶解有机质（DOM）的重要外部来源。然而，这些外来DOM进入海洋环境后的转变和命运仍然知之甚少。为了解决这一知识差距，研究人员在2024年夏季从南黄海海州湾（HZB）收集了雨水样本，并从最大的流入海州湾的河流临洪河收集了河流样本。分析了雨水和河流样品中溶解有机碳（DOC）的浓度和DOM的光学性质。此外，还进行了微生物培养实验，以评估来自不同来源的DOM在HZB中的生物利用度。结果表明，河流样品中DOC、显色性DOM （CDOM）和腐殖质样荧光DOM （FDOM）的浓度显著高于雨水样品（P < 0.05）。河流DOM表现出更强的芳香性、更高的腐殖化水平和更大的分子量，而雨水DOM表现出相反的特征。雨水中生物可利用DOC （BDOC）的比例为40.18% ~ 69.77%（平均53.93±11.48%），约为河水（7.36±2.55%）的7.3倍。夏季DOC湿沉降通量估算值为1662 t，显著低于河流输入通量（18821 t）。夏季BDOC湿沉降负荷（896 t）达到河流输入量（1385 t）的64.7%，表明大气湿沉降是HZB BDOC的重要途径。

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引用次数: 0

Effect of plant litter burial on soil dissolved organic matter in the Yellow River Delta wetland, China 植物凋落物掩埋对黄河三角洲湿地土壤溶解有机质的影响

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-05 DOI: 10.1016/j.marenvres.2026.107839

Linping Xie , Yutong Yan , Min Wang , Guangang Hu , Xia Sun , Jianbu Wang , Ming Xin , Qinsheng Wei , Baodong Wang

Dissolved organic matter (DOM) derived from plant litter frequently regulates the generation and migration of carbon in coastal wetlands and its transport to adjacent waters. To understand the role of salt marsh in regulating organic carbon cycling in coastal wetlands, laboratory incubation was conducted on litter from one woody plant (Tamarix chinensis) and two herbaceous plants (Phragmites australis, Suaeda salsa) from the Yellow River Delta wetland. The net increment of dissolved organic carbon (ΔDOC) and the net total fluorescence intensity (ΔFt) in soil DOM rapidly peaked within 1 week after burial of the plant litter, and then quickly decreased to much lower values and fluctuated with a slightly increasing trend. A large percentage of tryptophan-like proteins in soil DOM were detected in the early stage of incubation, whereas a high percentage of humic-acid-like organics was observed after litter decomposition for 3 months. Leaf litter of T. chinensis with the higher initial quality (e.g., low carbon/nitrogen (N), cellulose/N, and lignin/N ratios), released the maximum amount of DOM, suggesting that woody plant leaf litter has greater potential for releasing organic matter than herbaceous plant litter. This study highlights the significant impacts of salt marsh plant litter decomposition on soil DOM characteristics and its potential contribution to coastal ecosystem.

来自植物凋落物的溶解有机质（DOM）经常调节滨海湿地碳的产生和迁移及其向邻近水域的运输。为了解盐沼对滨海湿地有机碳循环的调节作用，以黄河三角洲湿地1株木本植物柽柳（Tamarix chinensis）和2株草本植物芦苇（Phragmites australis）、沙豆叶（Suaeda salsa）凋落物为研究对象，进行了室内培养。土壤DOM中溶解有机碳净增量（ΔDOC）和净总荧光强度（ΔFt）在凋落物掩埋后1周内迅速达到峰值，随后迅速下降至较低水平，并呈小幅上升趋势波动。培养初期土壤DOM中色氨酸样蛋白含量较高，凋落物分解3个月后土壤DOM中腐植酸样有机物含量较高。初始质量较高（低碳氮比、低纤维素氮比、低木质素氮比）的柽柳凋落叶释放的DOM量最大，说明木本植物凋落叶释放有机质的潜力大于草本植物凋落叶。本研究强调了盐沼植物凋落物分解对土壤DOM特征的显著影响及其对沿海生态系统的潜在贡献。

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引用次数: 0

Thermal buffering by intertidal oyster reefs on mudflats in the European Wadden Sea 欧洲瓦登海泥滩潮间带牡蛎礁的热缓冲作用

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-05 DOI: 10.1016/j.marenvres.2026.107834

E. Rosa Jolma , Sonja M. van Leeuwen , David W. Thieltges

The increase in heatwave frequency and severity due to climate change can threaten intertidal organisms that already experience large temperature fluctuations. Habitat-forming species can mitigate temperature extremes by creating protective microhabitats. While Pacific oysters (Magallana gigas) are known to provide thermal refuge on tropical rocky shores, their influence on temperate intertidal mudflat systems has not been investigated before. We examined the thermal environment within oyster reefs in the European Wadden Sea by recording temperatures in two microhabitat types (crevices between oysters and oyster-formed tidal pools) and comparing them to adjacent mudflats. Temperatures were measured over one year using biomimetic loggers that replicate the thermal properties of the blue mussel (Mytilus edulis), a key co-inhabitant of oyster reefs. Crevices between oysters provided cooler microhabitats particularly in summer when mean temperatures were 0.2–0.4 ± 0.02–0.05 °C lower and daily minimum temperatures were 1.0 ± 0.43 °C lower than on surrounding mudflats, while cumulative heat exposure was only moderately lower and day maximum temperatures were lower than mudflat values only at one of two sites. In contrast, tidal pools had higher day maximum temperatures than the surrounding mudflat across the year. These results demonstrate that oysters can provide localized thermal buffering in temperate mudflat systems, especially through reduced mean temperatures in crevices. However, the effect is less pronounced than in tropical rocky environments. Our findings highlight the context-dependent role of ecosystem engineers in modifying thermal landscapes, with potential implications for species persistence under climate change.

气候变化导致的热浪频率和严重程度的增加可能会威胁到已经经历了巨大温度波动的潮间带生物。栖息地形成物种可以通过创造保护性微栖息地来缓解极端温度。虽然太平洋牡蛎（Magallana gigas）被认为是热带岩石海岸的热避难所，但它们对温带潮间带泥滩系统的影响之前还没有被研究过。我们通过记录两种微栖息地类型（牡蛎和牡蛎形成的潮汐池之间的缝隙）的温度，并将它们与邻近的泥滩进行比较，研究了欧洲瓦登海牡蛎礁内的热环境。在一年的时间里，使用仿生学记录器测量温度，这些记录器复制了蓝贻贝（Mytilus edulis）的热特性，蓝贻贝是牡蛎礁的主要共同居民。牡蛎之间的缝隙提供了较凉爽的微生境，特别是在夏季，平均气温比周围泥滩低0.2-0.4±0.02-0.05°C，日最低气温比周围泥滩低1.0±0.43°C，而累积热量暴露仅略低，日最高温度仅在两个地点中的一个低于泥滩值。相比之下，潮汐池全年的最高气温高于周围的泥滩。这些结果表明，牡蛎可以在温带泥滩系统中提供局部的热缓冲，特别是通过降低裂缝的平均温度。然而，这种影响没有在热带岩石环境中那么明显。我们的研究结果强调了生态系统工程师在改变热景观方面的环境依赖作用，这对气候变化下物种的持久性具有潜在的影响。

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引用次数: 0

Hydrodynamic processes and their impact on eutrophication in two distinct types of bays near the Beibu Gulf coast: insight from dual water isotopes 北部湾沿岸两种不同类型海湾的水动力过程及其对富营养化的影响：来自双水同位素的见解

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-05 DOI: 10.1016/j.marenvres.2026.107840

Junhui Wu , Ruixue Cao , Qibin Lao , Guangzhe Jin , Xuan Lu , Chunqing Chen , Fajin Chen , Shuwen Zhang

Quantitative understanding of hydrodynamic processes and nutrient supply in different types of small bays remains limited. By combining water isotopes, hydrological parameters, and nutrient analysis, our findings revealed that Qinzhou Bay (a bay with multiple riverine inputs) is significantly influenced by coastal diluted water (49 %), while Tieshangang Bay (a bay without riverine input) is mainly influenced by high-salinity seawater outside the bay (61 %) during the early rainy season. However, despite these differences, Tieshangang Bay receives a greater proportion of nutrient supply from diluted water (69–95 %) compared to Qinzhou Bay (58–87 %). This disparity is related with the higher seawater intrusion into the Tieshangang Bay, which creates an internal salinity front that inhibits nutrient diffusion outside the bay. The barrier effect of the front hinders the expansion of terrestrial nutrients out of the bay, and accumulates in the bay, exacerbating the seawater eutrophication in the inner Tieshangang bay. This results in a significantly higher degree of eutrophication in Tieshangang Bay compared to Qinzhou Bay. Our study provides valuable insights into the hydrodynamic processes and their impact on eutrophication in different types of bays, emphasizing the importance of the existence of rivers for nutrient transport in small bays.

对不同类型的小海湾的水动力过程和营养供应的定量理解仍然有限。结合水体同位素、水文参数和养分分析，发现钦州湾（多河流输入的海湾）在雨季早期主要受沿海稀释水的影响（49%），而铁山岗湾（无河流输入的海湾）主要受海湾外高盐度海水的影响（61%）。然而，尽管存在这些差异，铁山岗湾从稀释水中获得的营养供应比例（69 - 95%）比钦州湾（58 - 87%）更高。这种差异与铁山岗湾较高的海水入侵有关，这在内部形成了一个盐度锋，抑制了海湾外的营养物质扩散。前缘的屏障作用阻碍了陆源营养物向海湾外扩展，并在海湾内积聚，加剧了铁山岗湾内海水富营养化。这导致铁山岗湾的富营养化程度明显高于钦州湾。我们的研究为不同类型海湾的水动力过程及其对富营养化的影响提供了有价值的见解，强调了河流存在对小海湾营养物质运输的重要性。

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引用次数: 0

Comparative swarming dynamics of Antarctic krill and ice krill in the Ross Sea Region Marine Protected Area 罗斯海海洋保护区南极磷虾和冰磷虾的比较动态。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-05 DOI: 10.1016/j.marenvres.2026.107842

Wuju Son , Sung Hoon Kim , Jaeill Yoo , Tae-Wan Kim , Jisoo Park , Jeong-Hoon Kim , Hyoung Sul La

Antarctic krill (Euphausia superba) and ice krill (Euphausia crystallorophias) are vital to the Southern Ocean ecosystem, yet their swarming behavior remains poorly understood. This study applied a novel approach in the Ross Sea by directly linking acoustically detected swarms with net-captured krill, enabling precise identification of species and body size—key traits often unavailable in previous studies. From 14 Antarctic krill and 55 ice krill swarms, key properties—depth, length, height, area, and packing concentration—were extracted. Hierarchical clustering grouped swarms into two Antarctic krill groups and three ice krill groups with significant differences (P < 0.01). Antarctic krill swarms were often shallower, in warmer, less saline waters away from the coastline and ice-edge, compared to ice krill. Larger Antarctic krill (47.5 mm) formed swarms about 40 times smaller in area than smaller ones (40.1 mm). The smallest ice krill (11.4 mm) appeared in Terra Nova Bay, at greater depths, forming dense swarms. Despite similar body sizes and environmental conditions, some ice krill swarms were up to 15 times larger than others. Body length was a key factor influencing swarm properties. These findings provide new insights into swarming strategies and behavioral ecology of both species in the Ross Sea.

南极磷虾（Euphausia superba）和冰磷虾（Euphausia crystallorophias）对南大洋生态系统至关重要，但它们的群体行为仍然知之甚少。这项研究在罗斯海采用了一种新的方法，直接将声学检测到的群体与网捕获的磷虾联系起来，从而能够精确识别物种和体型——这是以前研究中通常无法获得的关键特征。从14个南极磷虾群和55个冰磷虾群中提取了关键属性——深度、长度、高度、面积和包装浓度。分层聚类将种群分为两个南极磷虾类群和三个冰磷虾类群，差异显著(P

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引用次数: 0