Marine environmental research最新文献

英文中文

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

Ecological risk and source apportionment of heavy metals in surface sediments from a key shellfish production area in Northern Liaodong Bay, China 辽东湾北部主要贝类产区表层沉积物重金属生态风险及来源分析

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

Marine environmental research

Pub Date : 2026-01-03 DOI: 10.1016/j.marenvres.2026.107833

Ang Li , Suyan Xue , Muzhan Sun , Qingbin Ma , Jiaqi Li , Lulei Liu , Ling Zhu , Yuze Mao

As a key shellfish production area in Northern Liaodong Bay, Geligang supports an economically important industry and possesses significant ecological value. However, increasing anthropogenic pressures pose growing threats to this region. Assessing ecological risks from heavy metals and identifying their sources are therefore essential for effective environmental protection and pollution management. This study evaluated ecological risks and sources of heavy metals (Cu, Zn, Pb, Cd, and Hg) in surface sediments of Geligang using the potential ecological risk index (RI) and the geoaccumulation index (Igeo), alongside principal component analysis (PCA) and the positive matrix factorization (PMF) model for source apportionment. Metal concentrations followed the order Zn (22.949 ± 6.507 mg kg⁻¹) > Pb (12.066 ± 6.359 mg kg⁻¹) > Cu (5.134 ± 2.114 mg kg⁻¹) > Cd (0.197 ± 0.126 mg kg⁻¹) > Hg (0.067 ± 0.033 mg kg⁻¹). All measured heavy metal concentrations complied with China's Marine Sediment Quality Standard Class I (MSQ-1). Moreover, mean concentrations were below both the threshold effect level (TEL) and effects range-low (ERL), indicating a low probability of adverse biological effects. Both the RI and Igeo indices identified Hg and Cd as the primary contributors to ecological risk. Both the PCA and PMF models resolved four major sources: agricultural activities (contributing to Pb, Cd, and Cu), industrial emissions (Cd, Cu, Hg, and Zn), coal combustion and transportation (Hg and Pb), and natural sources (Zn). Targeted management of these sources is crucial to ensure the safety of regional shellfish production and the protection of the marine environment.

作为辽东湾北部重要的贝类产区，歌门港支撑着重要的经济产业，具有重要的生态价值。然而，不断增加的人为压力对该地区构成了越来越大的威胁。因此，评估重金属的生态风险并确定其来源对于有效的环境保护和污染管理至关重要。采用潜在生态风险指数（RI）和地质累积指数（Igeo），结合主成分分析（PCA）和正矩阵分解（PMF）模型对葛岗表层沉积物中重金属（Cu、Zn、Pb、Cd、Hg）的生态风险及其来源进行了评价。金属浓度跟随订单锌(22.949±6.507毫克公斤)> Pb(12.066±6.359毫克公斤)>铜(5.134±2.114毫克公斤)> Cd(0.197±0.126毫克公斤)> Hg(0.067±0.033毫克公斤)。所有测量的重金属浓度均符合中国海洋沉积物质量标准I类（MSQ-1）。此外，平均浓度低于阈值效应水平（TEL）和效应范围低（ERL），表明不良生物效应的可能性较低。RI和Igeo指数均确定Hg和Cd是生态风险的主要贡献者。PCA和PMF模型都解决了四个主要来源：农业活动（对Pb、Cd和Cu有贡献），工业排放（Cd、Cu、Hg和Zn），煤炭燃烧和运输（Hg和Pb），以及自然来源（Zn）。对这些来源进行有针对性的管理对于确保区域贝类生产安全和保护海洋环境至关重要。

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引用次数: 0

Spatial variability in zooplankton consumption by the Pacific oyster (Crassostrea gigas) relative to native bivalves in the Gulf of Alaska 阿拉斯加湾太平洋牡蛎（长牡蛎）相对于本地双壳类的浮游动物消耗的空间变异性。

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

Marine environmental research

Pub Date : 2026-01-02 DOI: 10.1016/j.marenvres.2025.107828

Josianne Haag, Alorah D. Bliese, Sarah L. Mincks, Amanda L. Kelley

In the Northern Gulf of Alaska (NGA), the diet of the non-native Pacific oyster (Crassostrea gigas) lacks thorough characterization, despite the species' significant contribution to the state's mariculture industry. Previous observations indicated that C. gigas occupies a higher trophic level than the native Pacific blue mussel (Mytilus trossulus), consuming zooplankton in addition to phytoplankton. Using bulk stable isotopes (δ¹³C and δ¹⁵N), we characterized the spatial patterns in C. gigas resource across five sites in the NGA spanning 300 km (Jakolof Bay, Bootleggers Cove, Peterson Bay, Simpson Bay, and Bridget Cove). Individuals of M. trossulus and C. gigas were collected from each site, and in Jakolof Bay, five additional native bivalve species were also examined. C. gigas occupied a higher trophic level than M. trossulus across all sites, and a stable isotope mixing model revealed that zooplankton contributed 29 %–94 % of C. gigas diet in spring 2024. The isotopic space of C. gigas in Jakolof Bay did not overlap with any of the native clam species, indicating that C. gigas occupies a distinct isotopic niche. Furthermore, C. gigas DNA gut content analysis detected M. trossulus DNA in C. gigas from two of four bays sampled, suggesting that C. gigas consumed M. trossulus larvae. These results indicate that in Alaska, C. gigas may occupy a distinct dietary niche relative to other native bivalves, including predation on bivalve larvae. Impacts of the predation pressure on native species should be closely monitored as mariculture operations expand.

在阿拉斯加北部海湾（NGA），非本地太平洋牡蛎（长牡蛎）的饮食缺乏彻底的特征，尽管该物种对该州的海水养殖业做出了重大贡献。以前的观察表明，C. gigas占据比本地太平洋蓝贻贝（Mytilus trossulus）更高的营养水平，除了浮游植物外，还消耗浮游动物。利用体积稳定同位素（δ13C和δ15N）对NGA 5个地点（Jakolof湾、Bootleggers湾、Peterson湾、Simpson湾和Bridget湾）的C. gigas资源的空间格局进行了表征。在每个地点都收集到了M. trossulus和C. gigas的个体，并在Jakolof湾调查了另外5种本地双壳类。在所有的研究地点，C. gigas的营养水平都高于M. trossulus，稳定的同位素混合模型显示，2024年春季浮游动物对C. gigas饮食的贡献为29% - 94%。在Jakolof湾，C. gigas的同位素空间与任何本地蛤蜊物种都没有重叠，表明C. gigas占据了一个独特的同位素生态位。此外，通过对4个海湾中2个海湾的巨螺蛳DNA肠道含量分析，发现巨螺蛳以巨螺蛳幼虫为食。这些结果表明，在阿拉斯加，相对于其他本地双壳类动物，巨牡蛎可能占据一个独特的饮食生态位，包括捕食双壳类动物的幼虫。随着海水养殖规模的扩大，应密切监测捕食压力对本地物种的影响。

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引用次数: 0

Coastal zooplankton assemblages in the southern Barents Sea: a summer pattern of diversity and production. 巴伦支海南部沿海浮游动物群落：多样性和产量的夏季模式。

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

Marine environmental research

Pub Date : 2026-01-01 Epub Date: 2025-11-13 DOI: 10.1016/j.marenvres.2025.107710

Vladimir G Dvoretsky, Alexander G Dvoretsky

Zooplankton are a key food source for fish and shellfish in the Arctic. One of the most valuable areas for fishing potential is the southern Barents Sea. To assess the productive capacity of this coastal area, we examined spatial variations in the summer zooplankton community. We recorded 44 different zooplankton taxa with the most common species being copepods Acartia longiremis, Calanus finmarchicus, Oithona similis, and Temora longicornis. The study revealed two distinct zooplankton groups, one in the fjords and the other in the open sea. These groups were noticeably different because of environmental factors, which aligned closely with the distribution of the zooplankton populations. Smaller neritic (coastal) species made up most of the zooplankton in shallow, inshore waters, while larger Calanus copepods were more common in deeper, offshore waters. Zooplankton biomass and daily production were generally higher in the open sea, reaching averages of 5.4 g (dry mass per m²) and 204 mg (dry mass per m² per day), compared to 0.9 g and 40 mg in inshore waters. The findings showed that water depth, temperature, and chlorophyll a levels were the main environmental factors influencing zooplankton abundance, biomass, and productivity. Zooplankton diversity was higher in the bays, likely due to the more varied environmental conditions found there. Comparative assessment of summer zooplankton biomass and production values underscores the considerable productive potential of the southern Barents Sea. Our findings provide novel insights into the structure and function of Arctic coastal zooplankton communities and offer a valuable baseline for ongoing pelagic ecosystem monitoring.

浮游动物是北极鱼类和贝类的主要食物来源。最具渔业潜力的地区之一是巴伦支海南部。为了评估该沿海地区的生产能力，我们研究了夏季浮游动物群落的空间变化。我们记录了44种不同的浮游动物类群，其中最常见的种类是桡足类：长足Acartia longiremis， Calanus finmarchicus， Oithona similis和Temora longicornis。这项研究揭示了两个不同的浮游动物群体，一个在峡湾，另一个在公海。由于环境因素的影响，这些群体之间存在显著差异，这与浮游动物种群的分布密切相关。较小的浅海（沿海）物种构成了浅海、近岸水域的大部分浮游动物，而较大的桡足类在较深的近海水域更为常见。公海的浮游动物生物量和日产量普遍较高，平均达到5.4 g（干质量每平方米）和204 mg（干质量每平方米每天），而近海水域为0.9 g和40 mg。结果表明，水体深度、温度和叶绿素a水平是影响浮游动物丰度、生物量和生产力的主要环境因子。海湾的浮游动物多样性更高，可能是由于那里的环境条件更多样化。夏季浮游动物生物量和生产价值的比较评估强调了巴伦支海南部相当大的生产潜力。我们的发现对北极沿海浮游动物群落的结构和功能提供了新的见解，并为正在进行的远洋生态系统监测提供了有价值的基线。

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引用次数: 0

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

Marine environmental research

Pub Date : 2026-01-01

引用次数: 0

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

Marine environmental research

Pub Date : 2026-01-01

引用次数: 0

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

Marine environmental research

Pub Date : 2026-01-01

引用次数: 0

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

Marine environmental research

Pub Date : 2026-01-01

引用次数: 0

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