Regional Studies in Marine Science最新文献_第7页

Deep water of the Gdansk Deep (Baltic Sea): variability of hydrology and dissolved oxygen over recent decades 格但斯克深海（波罗的海）的深水：近几十年来水文和溶解氧的变化

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-01 DOI: 10.1016/j.rsma.2025.104727

Kapustina Mariia , Bubnova Ekaterina , Dudkov Ivan

This study examines temporal changes in the deep layer (>100 m) of the Gdansk Deep (Baltic Sea) over the period 2003–2023, aiming to quantify hydrological trends and their implications for hypoxia. Utilizing over 4 000 field measurements combined with NEMO model outputs, the study shows temperature increase of approximately 1.6 °C and slight salinity rise of 0.7 PSU. Dissolved oxygen concentrations declined sharply, dropping from 2-3 ml/L to <1 ml/L after the year 2018, with euxinic conditions persisting from 2019 through late 2023. Although the 2014 Major Baltic Inflow temporarily elevated salinity (to 14.4 PSU) and oxygen levels, oxygen was consumed within months, leading to renewed hypoxia and seasonal euxinia. The observed increase in oxygen deficiency in the 100–110 m layer is associated with biochemical processes in bottom sediments, the role of which has increased significantly over the study period. Accumulated organic matter in bottom sediments continues to support intense oxygen consumption, and observed climate change further intensifies these processes. Seasonal amplitude also diminished: since 2018, summer minima fell by over 1.5 ml/L, and winter maxima by 0.6 ml/L relative to the 20-year mean. Nonetheless, local oxygen source was hypothesized for the Gdansk Basin — wind-driven vertical convection above the steep slope after strong westerly winds in November–December.

本研究考察了格但斯克深海（波罗的海）深层（>；100米）在2003-2023年期间的时间变化，旨在量化水文趋势及其对缺氧的影响。利用超过4000个现场测量数据结合NEMO模型输出，该研究显示温度升高约1.6°C，盐度轻微升高0.7 PSU。溶解氧浓度急剧下降，2018年后从2-3毫升/升降至1毫升/升，缺氧状况从2019年持续到2023年底。尽管2014年主要的波罗的海流入暂时升高了盐度（达到14.4 PSU）和氧气水平，但氧气在几个月内就被消耗掉了，导致缺氧和季节性缺氧。在100-110 m层观测到的缺氧增加与底部沉积物中的生化过程有关，其作用在研究期间显著增加。底部沉积物中积累的有机物继续支持强烈的氧气消耗，而观测到的气候变化进一步加剧了这一过程。季节振幅也有所减弱：自2018年以来，与20年平均值相比，夏季最小值下降了1.5毫升/升以上，冬季最大值下降了0.6毫升/升。尽管如此，格但斯克盆地的局部氧源假设为11 - 12月强烈西风后陡坡上方的风驱动垂直对流。

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引用次数: 0

Microbial and pathogenic indicators for pollution risk assessment in an urban estuary under dry and wet conditions 干湿条件下城市河口污染风险评价的微生物和病原学指标

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-01 DOI: 10.1016/j.rsma.2025.104730

Lawrance Irudayarajan , Chinnarajan Ravindran , Umesh Kumar Pradhan , Seyieleno C. Seleyi , Balaram Sahu , Soniya Sukumaran , Chellandi Mohandass

Tropical estuaries are vital ecosystems, serving as biodiversity nurseries and supporting key ecological processes. Increasing anthropogenic pressures, however, have imposed unforeseen challenges on water resources in urban estuaries. To evaluate microbial risks and ecosystem health, this study investigated a tidally influenced estuary, integrating pathogen detection with indicator microbes and physico-chemical parameters. High abundances of fecal and sewage-associated indicators, including total coliforms, Escherichia coli, Pseudomonas, Salmonella, Shigella, and Vibrio, were observed in the upper estuary during the dry season, while viral occurrences peaked in the wet season due to allochthonous inputs. Elevated levels of Cyanobacteria, Planctomycetes, Actinobacteria, and Verrucomicrobiota under dry conditions reflected hypoxic states in the upper estuary. The identified bacterial community structure further indicated hydrocarbon and heavy-metal contamination, eutrophication, hypoxic sulfur metabolism, pathogenesis, and antibiotic resistance. Collectively, these findings highlight the utility of microbial surveillance, encompassing both point and non-point sources, as a predictive framework to detect early microbial shifts and enable timely interventions against large-scale contamination events.

热带河口是重要的生态系统，是生物多样性的苗圃，支持关键的生态过程。然而，不断增加的人为压力给城市河口的水资源带来了无法预见的挑战。为了评估微生物风险和生态系统健康，本研究以受潮汐影响的河口为研究对象，将病原体检测与指示微生物和理化参数相结合。在干季期间，在河口上游观察到大量的粪便和污水相关指标，包括总大肠菌群、大肠杆菌、假单胞菌、沙门氏菌、志贺氏菌和弧菌，而由于外来输入，病毒发生率在湿季达到高峰。干燥条件下蓝藻、plantomcetes、放线菌和Verrucomicrobiota的升高反映了河口上游缺氧状态。所鉴定的细菌群落结构进一步表明了碳氢化合物和重金属污染、富营养化、缺氧硫代谢、发病机制和抗生素耐药性。总的来说，这些发现强调了微生物监测的实用性，包括点和非点来源，作为一种预测框架，可以发现早期微生物转移，并能够及时干预大规模污染事件。

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引用次数: 0

Metal concentrations in Mugil liza (Valenciennes, 1836) from a southern Brazilian estuary: tissue distribution and human health risk assessment 巴西南部河口Mugil liza （Valenciennes, 1836）的金属浓度：组织分布和人类健康风险评估

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-01 DOI: 10.1016/j.rsma.2025.104728

Hortência Cordeiro da Luz , Cristian Berto da Silveira , Clarissa Pellegrini Ferreira , Marcella Oliveira de Almeida , Jorge Luiz Rodrigues-Filho , Karim Hahn Lüchmann

Metal contamination poses global environmental and public health concerns due to its persistence and potential for biomagnification in aquatic food webs. This study investigated cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn) concentrations in muscle and liver tissues of Mugil liza (Valenciennes, 1836), a commercially important fish species from the Laguna Estuarine System (LES), southern Brazil. Metal concentrations were quantified and compared with legal safety thresholds, and potential human health risks were assessed for muscle tissue using the Target Hazard Quotient (THQ). Associations with tissue type, fish size, and reproductive stage were also evaluated. In muscle, metal concentrations (mg/kg wet weight) followed the order Zn (3.23–8.69) > Cu (0.06–1.69), with Cd and Pb below detection limits. In liver tissue, concentrations were: Cu (53.86–3,08) > Zn (up to 238.98) > Cd (0.09–3.21); Pb was not detected. Legal limits were exceeded only in liver samples, while muscle tissue remained within safe limits for human consumption. THQ values for all metals in muscle were below 1, indicating low potential risk to human health. Metal concentrations in M. liza showed slight variation across reproductive stages, with higher hepatic levels observed in immature and post-spawning males and in post-spawning females. Generalized Additive Models (GAM) indicated that, except for Zn in muscle, metal concentrations generally increased with fish length in both tissues. These results demonstrate that M. liza predominantly accumulates metals in the liver, suggesting potential ecological risks to predators through trophic transfer, while muscle concentrations confirm safety for human consumption.

金属污染由于其在水生食物网中的持久性和潜在的生物放大效应而引起全球环境和公共卫生问题。本研究调查了巴西南部拉古纳河口系统（LES）一种重要的商业鱼类Mugil liza （Valenciennes, 1836）肌肉和肝脏组织中的镉（Cd）、铜（Cu）、铅（Pb）和锌（Zn）浓度。对金属浓度进行量化，并与法定安全阈值进行比较，并使用目标危害商数（THQ）评估肌肉组织的潜在人体健康风险。还评估了与组织类型、鱼的大小和繁殖阶段的关系。肌肉中金属含量（mg/kg湿重）依次为Zn (3.23-8.69) >； Cu (0.06-1.69)， Cd和Pb低于检出限。肝组织中Cu (53.86 ~ 3.08) >； Zn（高达238.98）>； Cd (0.09 ~ 3.21)；未检出铅。只有肝脏样本超过了法定限制，而肌肉组织仍在人类食用的安全范围内。肌肉中所有金属的THQ值均低于1，表明对人体健康的潜在风险较低。金属浓度在整个繁殖阶段略有变化，未成熟和产卵后的雄性和产卵后的雌性在肝脏中观察到较高的水平。广义加性模型（GAM）表明，除肌肉中Zn外，两种组织中金属浓度均随鱼体长度的增加而增加。这些结果表明，m.l iza主要在肝脏中积累金属，这表明通过营养转移对捕食者有潜在的生态风险，而肌肉浓度证实了人类食用的安全性。

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引用次数: 0

Radiological risk assessment of primordial radionuclides in sediment: A case study of southeast Chennai, Tamil Nadu, India 沉积物中原始放射性核素的辐射风险评估：以印度泰米尔纳德邦金奈东南部为例

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2025-12-27 DOI: 10.1016/j.rsma.2025.104731

Marckasagayam Priyadharshini , Munawar Suhail Ahmed , A. Chandrasekaran , Bharathi Santhanabharathi , Kumara Perumal Pradhoshini , Aarthi Murugavel , Van-Hao Duong , Ismail Rahman , Mohamed Saiyad Musthafa

In this study, sediments from 12 locations along Chennai, Tamil Nadu, India's southeast coast were examined for the distribution and concentration of naturally occurring radionuclides (²³⁸ U, ²³²Th, and ⁴⁰K). For ²³⁸U, activity concentrations were below detection limits (BDL) to 940 ± 8 Bq/kg, for ²³²Th, BDL to 4978 ± 16 Bq/kg, and for ⁴⁰K, between 490 ± 22 and 6669 ± 30 Bq/kg. The highest activity levels of any radionuclide were seen in Nemmeli (S7). The average eTh/eU ratio was 3.89, indicating a high thorium-to-uranium ratio, with Nemmeli (S7) showing the most pronounced value (eTh/eU > 7). The value suggests the depletion of uranium, potentially due to leaching. Assessment of radiological risk parameters revealed a range of absorbed dose rates from 24.2 to 3721.1 nGy/h, annual effective dose equivalents from 0.03 to 4.6 mSv/y, external hazard indices from 0.1 to 23.1, internal hazard indices from 0.1 to 25.7, excess lifetime cancer risk (ELCR) from 0.1 to 15.97, and annual gonadal dose equivalents from 153.86 to 25806.71 µSv/y. The ELCR values exceeded the world average, indicating elevated radiogenic risks to human health in these coastal regions. Notably, Nemmeli (S7) exhibited the highest radiological risk, with values 86 times greater than the global average of 300 µSv/y, highlighting an alarmingly elevated radiological risk associated with radionuclide concentrations at this site.

在这项研究中，来自印度东南海岸泰米尔纳德邦金奈12个地点的沉积物被检测了天然存在的放射性核素（238 U， 232Th和40K）的分布和浓度。238 u,活动浓度低于检测极限(BDL)到940 ±8  Bq /公斤,232,BDL - 4978 ± 16 Bq /公斤,40 k,在490年 ± 22和6669年 ±30  Bq /公斤。所有放射性核素的最高活性水平出现在Nemmeli （S7）。平均eTh/eU比值为3.89，表明钍铀比值较高，其中Nemmeli （S7）值最为显著（eTh/eU > 7）。该值表明铀的消耗，可能是由于浸出。辐射风险参数评估显示，吸收剂量率范围为24.2 ~ 3721.1 nGy/h，年有效剂量当量范围为0.03 ~ 4.6 mSv/y，外部危害指数范围为0.1 ~ 23.1，内部危害指数范围为0.1 ~ 25.7，超额终身癌症风险（ELCR）范围为0.1 ~ 15.97，年性腺剂量当量范围为153.86 ~ 25806.71µSv/y。ELCR值超过世界平均水平，表明这些沿海地区对人类健康的放射性致癌风险升高。值得注意的是，Nemmeli （S7）显示出最高的辐射风险，其值是全球平均水平300 μ Sv/y的86倍，突出了该站点与放射性核素浓度相关的惊人的高辐射风险。

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引用次数: 0

Monthly variations in gonadosomatic index, plasma 11-ketotestosterone, and their association with testicular development stages in male golden trevally fish Gnathanodon speciosus (Teleostei: Carangiformes) 雄性牙颌鱼睾丸性腺指数、血浆11-酮睾酮的月变化及其与睾丸发育阶段的关系

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2025-12-24 DOI: 10.1016/j.rsma.2025.104732

Hung Quoc Pham, Ut Van Phan, Hoang Minh Le

Gonadosomatic index (GSI) and sex steroids are common indicators in assessment of fish maturity. The present study investigated monthly variations of the GSI, plasma 11-ketotestosterone (11-KT), and their association with testicular development stages (TDS) during sampling period in male golden trevally fish (Gnathanodon speciosus). From December to January, GSI and plasma 11-KT levels remained low, followed by a significant increase from February to November, with 11-KT peaking during spermatogenesis. Testicular histology revealed asynchronous spermatocyte development from February to November, with multiple spermatocyte stages coexisting, confirming male golden trevally as a multiple-spawning species with a reproductive season spanning February to November. Elevated plasma 11-KT levels during spermatocyte growth underscore its critical role in spermatogenesis. These findings enhance understanding of the reproductive physiology and endocrinology of golden trevally, providing useful insights for broodstock management, developing appropriate broodstock conditioning, and helping hatchery producers strategically plan for artificial reproduction and seed production.

性腺激素指数（GSI）和性类固醇激素是评价鱼类成熟度的常用指标。本研究研究了取样期间雄性金银鱼GSI、血浆11-酮睾酮（11-KT）的月变化及其与睾丸发育阶段（TDS）的关系。从12月到1月，GSI和血浆11-KT水平保持在较低水平，随后从2月到11月显著升高，11-KT在精子发生期间达到峰值。2月至11月睾丸组织学显示精母细胞发育不同步，多个精母细胞阶段共存，证实雄性金龟为多产卵物种，繁殖季节为2月至11月。精母细胞生长过程中血浆11-KT水平升高强调了其在精子发生中的关键作用。这些发现有助于加深对金银鱼生殖生理学和内分泌学的认识，为养鱼场管理、制定合适的养鱼场条件、帮助孵化场生产者战略性地规划人工繁殖和种籽生产提供有益的见解。

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引用次数: 0

A recent 46-year (1979–2024) wind climate over a marginal sea: A case study of the Marmara Sea 边缘海域近46年（1979-2024）风气候：以马尔马拉海为例

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2025-12-24 DOI: 10.1016/j.rsma.2025.104733

Fulya Islek

The present study assesses the recent wind climate and wind power potential in the Marmara Sea, a marginal sea characterized by peculiar oceanographic processes. After determining that the ERA5 wind fields correspond satisfactorily to the wind data measured at four stations, slightly better than the CFSv2 wind fields, the ECMWF’s 5th generation reanalysis products, ERA5 wind fields, are evaluated for the 46-year (1979 −2024) period. According to the long-term and seasonal averages, the centre of the sea is dominated by a strong and severe wind climate, and the variability in wind resources is relatively low. The western part of the sea (including north-western, western, and southwestern) shows a significant increasing trend in annual

V_{m}

, while there is no reasonable change trend in the eastern part of the sea. The seasonal long-term trends indicate opposite characteristics in the summer and winter, i.e., the entire basin tends to decrease slightly in the winter while tending to increase drastically in the summer. Seven reference regions are investigated to provide detailed information on wind climate and wind power potential. Among the reference points, the centre of the sea, P7, has the highest wind speed and wind power potential for both annual and interannual monthly

V_{m}

and

{WPD}_{m}

. This is followed by P5 in the south-central sea and P2 in the north-central sea. The centre of the sea is characterized by a stable, strong, and severe wind climate, and therefore, this region provides reliable, persistent, and sustainable wind power sources.

本研究评估了马尔马拉海最近的风气候和风力潜力，马尔马拉海是一个具有特殊海洋过程特征的边缘海。在确定ERA5风场与4个站点的实测风场符合较好，略优于CFSv2风场后，ECMWF的第五代再分析产品ERA5风场进行了46年（1979 −2024）的评估。从长期和季节平均来看，海中心以强、强风气候为主，风资源的变率相对较低。海的西部（包括西北、西部和西南）年Vm有明显的增加趋势，而海的东部没有合理的变化趋势。季节长期趋势在夏季和冬季表现出相反的特征，即整个流域在冬季有小幅减少的趋势，而在夏季有急剧增加的趋势。对七个参考区域进行了调查，以提供有关风气候和风力潜力的详细信息。参考点中，海面中心P7在年际和年际月度Vm和WPDm中具有最高的风速和风力潜力。中南部海域P5次之，中北部海域P2次之。海洋中心的特点是稳定、强劲和严峻的风气候，因此，该地区提供可靠、持久和可持续的风力发电资源。

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引用次数: 0

Macrolitter on the sandy beaches of Leizhou Peninsula: Composition, spatial distribution, and pollution status 雷州半岛沙滩上的大型凋落物：组成、空间分布及污染状况

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2025-12-23 DOI: 10.1016/j.rsma.2025.104725

Weihao Liu , Siquan Ye , Jian-Yu Dong , Gorka Bidegain , Xuefeng Wang

This study investigated the abundance, composition, type, color, spatial distribution, and sources of marine macrolitter at 10 beaches on the Leizhou Peninsula, China and used three beach quality indices—the Clean Costal Index (CCI), Plastic Abundance Index (PAI) and Hazardous Index (HI)—to evaluate the pollution level at each beach. We collected a total of 1658 litter items weighing 40.30 kg, with an average abundance of 0.25 ± 0.35 items/m² and an average mass density of 3.13 ± 9.66 g/m². Plastic was the most prevalent litter type, accounting for 84.92 % of all litter items, and the largest proportion of litter items (47.47 %) were white. Pollution profiles varied distinctly across urban, rural, and remote beaches, and the primary source of litter was identified as coastal recreational activities, accounting for 86.31 % of all items. According to the CCI scores, the beaches ranged from “very clean” to “extremely dirty,” and the PAI scores indicated that plastic abundance similarly varied from “very low” to “very high.” Hazardous items were found on all beaches (except for beach W3) but at low abundances, with most beaches having an HI value ≤ 1, indicating a low risk level. Overall, the Leizhou Peninsula had a relatively low abundance of plastic and other marine litter. To strengthen coastal protection and management, we recommend long-term continuous monitoring of litter sources, composition, and transport dynamics—alongside targeted measures such as stricter regulation of marine production and tourism activities, promotion of eco-friendly materials and waste classification—to provide comprehensive scientific support for effective marine litter mitigation.

研究了雷州半岛10个海滩的海洋大型凋零物的丰度、组成、类型、颜色、空间分布和来源，并采用清洁海岸指数（CCI）、塑料丰度指数（PAI）和有害指数（HI） 3种海滩质量指标对各海滩的污染程度进行了评价。共收集凋落物1658件，重量40.30 kg，平均丰度为0.25 ± 0.35件/m²，平均质量密度为3.13 ± 9.66 g/m²。塑料是最常见的垃圾类型，占所有垃圾的84.92 %，白色垃圾所占比例最大（47.47 %）。城市、农村和偏远海滩的污染状况差异明显，主要的垃圾来源被确定为沿海娱乐活动，占所有项目的86.31% %。根据CCI得分，海滩的范围从“非常干净”到“非常脏”，PAI得分表明塑料丰度同样从“非常低”到“非常高”。除W3海滩外，所有海滩均发现有害物质，但丰度较低，大多数海滩的HI值≤ 1，表明风险水平较低。总体而言，雷州半岛的塑料和其他海洋垃圾丰度相对较低。为了加强海岸保护和管理，我们建议长期持续监测垃圾来源、组成和运输动态，同时采取有针对性的措施，如更严格地监管海洋生产和旅游活动，推广环保材料和废物分类，为有效减少海洋垃圾提供全面的科学支持。

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引用次数: 0

Functional diversity as a sensitive indicator of eutrophication: Evidence from phytoplankton and periphyton dynamics in a coastal mesocosm 功能多样性作为富营养化的敏感指标：来自沿海中生态系统浮游植物和周围植物动态的证据

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2025-12-23 DOI: 10.1016/j.rsma.2025.104729

Bora Lee , Ji Nam Yoon , Young Kyun Lim , Nam-Il Won , Seung Ho Baek

Eutrophication alters coastal ecosystems by driving changes in nutrient availability and primary producer communities. This mesocosm study examined short-term responses of phytoplankton and periphyton communities to three nutrient regimes (control, low nutrient, and high nutrient) during late spring in the coastal waters of Geoje Island, Korea. Phytoplankton exhibited rapid shifts from dinoflagellate to diatom dominance, with treatment-specific differences in bloom timing and dominant taxa. High nutrient treatments promoted short-lived blooms of opportunistic diatoms (e.g., Pseudo-nitzschia spp. reaching 2.1 × 10⁷ cells L⁻¹) followed by declines, whereas low nutrient and control treatments maintained more stable assemblages dominated by Thalassiosira rotula. In periphyton, Cylindrotheca closterium dominated across all treatments but showed a transient biomass peak under high nutrient treatments (up to 4 × 10⁶ cells cm⁻²) before rapidly declining. Taxonomic diversity indices showed no significant differences among treatments, while functional diversity indices revealed more pronounced and statistically significant treatment-specific variations, particularly in periphyton (e.g., FRic, p < 0.05). These results indicate that functional diversity is a more sensitive indicator of nutrient-driven changes than species diversity alone and integrated monitoring of both plankton and periphyton communities, combined with nutrient and substrate management, is essential for effective eutrophication control and ecosystem resilience.

富营养化通过推动养分供应和初级生产者社区的变化来改变沿海生态系统。这项中生态研究考察了韩国巨济岛沿海水域晚春期间浮游植物和周围植物群落对三种营养状况（对照、低营养和高营养）的短期反应。浮游植物表现出从甲藻到硅藻优势的快速转变，并且在开花时间和优势类群上存在特异性差异。高营养处理促进了条件硅藻（如伪nitzschia spp.达到2.1 × 107 cells L−1）的短时间繁殖，然后下降，而低营养和对照处理则保持了以轮状海硅藻为主的更稳定的组合。在周围植物中，筒状膜梭菌在所有处理中都占主导地位，但在高营养处理下出现短暂的生物量峰值（高达4 × 106 cells cm - 2），然后迅速下降。分类学多样性指数在处理间无显著差异，而功能多样性指数在处理间表现出更明显的统计学差异，特别是在外植体上（如frc， p <； 0.05）。这些结果表明，功能多样性是一个比物种多样性更敏感的营养驱动变化指标，浮游生物和周围植物群落的综合监测，结合营养和基质管理，是有效控制富营养化和生态系统恢复能力的必要条件。

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引用次数: 0

Effects of seawall revetment surface modifications on marine biodiversity: A case study in China 海堤护岸面改造对海洋生物多样性的影响——以中国为例

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2025-12-19 DOI: 10.1016/j.rsma.2025.104724

Peng Yun , Junbao Huang , Qing Lyu , Huayu Chen , Jiali Gu , Jian Zeng , Zhenming Ge

Traditionally paved seawalls impede biological migration and dispersal, and degrade habitat serviceability, which negatively impacts coastal ecosystems. To promote the intertidal biodiversity of coastal construction, in this study, we conducted a design improvement experiment on seawall revetment blocks in a coastal zone in Zhejiang Province, Eastern China. Ten surface treatments were established on the seawall blocks, including surface roughening, pitting, and oyster shell embedment with a non-treatment control. The effects of different revetment treatments on marine biodiversity were investigated. Over a period of 12 months from spring to winter after block installation on the intertidal coastline, 18 marine species (incl. 3 sessile species and 15 mobile species) were observed on the experimental blocks, comprising mollusks, arthropods, and algae. Total 11, 7, 16, and 14 attached species were recorded in spring, summer, autumn, and winter, respectively. A wide range of organism abundance from 33.4 to 760.6 individuals m⁻² exhibited seasonal characteristics specific to the study area. The abundance and diversity of organisms attached on blocks with pits and oyster shells were significantly higher than those of other types of blocks. The Shannon–Wiener diversity index of benthic organisms on pitted (0.13 −1.92) and on shell-embedded blocks (0.11 −1.63) was higher than that on surface-roughened (0.07 −1.53) and blank blocks (0 −1.15). Blocks with high water-holding ability was more effective in enhancing the abundance of both sessile and mobile species than blocks with increased surface roughness. Although pitted blocks can attract most marine species for attachment, we also found that oyster shell-embedded blocks could maintain a high level of biodiversity and richness indices. Therefore, this type of safe biogenic material is recommended for constructing nature-based seawall revetments. The findings have provided empirical evidence and a technical demonstration of the ecological improvement of traditionally paved seawalls.

传统铺设的海堤阻碍了生物的迁移和扩散，降低了栖息地的可用性，对沿海生态系统产生了负面影响。为促进海岸带建筑潮间带生物多样性，本研究在浙江省某海岸带进行了海堤护岸块体设计改进试验。在海堤块上建立了10种表面处理，包括表面粗化、点蚀和牡蛎壳嵌入，并进行了非处理对照。研究了不同护岸处理对海洋生物多样性的影响。从春季到冬季，在潮间带岸线设置块体后的12个月里，在实验块体上观察到18种海洋物种（包括3种无根物种和15种活动物种），包括软体动物、节肢动物和藻类。春、夏、秋、冬共记录附种11种、7种、16种、14种。生物丰度在33.4 ~ 760.6个体m−2之间，呈现出研究区特有的季节性特征。有坑块和牡蛎壳块的生物丰度和多样性显著高于其他类型块。坑洞区（0.13 −1.92）和嵌壳区（0.11 −1.63）底栖生物的Shannon-Wiener多样性指数高于表面粗糙区（0.07 −1.53）和空白区（0 −1.15）。具有高持水能力的块体比具有高表面粗糙度的块体更能有效地增加无根和可移动物种的丰度。虽然坑状块体可以吸引大多数海洋物种的附着，但我们也发现嵌入牡蛎壳的块体可以保持较高的生物多样性和丰富度指数。因此，这种安全的生物材料被推荐用于建造天然海堤护岸。研究结果为传统铺设海堤的生态改善提供了经验证据和技术论证。

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引用次数: 0

First report on the use of various fishing gears and transport schemes for the captive breeding of shortfin scad (Decapterus macrosoma) as a potential species for aquaculture 关于使用各种渔具和运输计划圈养养殖短鳍鱼片（巨鳍鱼）作为潜在的水产养殖品种的第一份报告

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2025-12-19 DOI: 10.1016/j.rsma.2025.104722

Ma. Irene Cabanilla-Legaspi , Sayaka Ito , Leobert de la Peña , Jernet Zyca Silorio

This study establishes the first protocols for the live capture and transport of shortfin scad (Decapterus macrosoma), a potential new species for aquaculture. Wild fish were collected in the central Philippines using different fishing gears (ring net, otoshi-ami, hook-and-line), held for conditioning in a temporary cage, and transported using polyethylene bags or a customized chilled tank. While 3-day post-transport survival varied widely (1.5–100 %), a key finding was that a prolonged conditioning period prior to transport was essential for achieving high (100 %) survival rates, regardless of the capture method or transport system used. This research provides a critical foundation for supplying healthy broodstock to initiate captive breeding programs for shortfin scad.

本研究初步建立了短鳍鱼（Decapterus macrosoma）的活体捕捞和运输方案，这是一种潜在的水产养殖新物种。在菲律宾中部使用不同的渔具（环网、otoshii -ami、钩线）收集野生鱼类，将其保存在临时笼子中进行调理，并使用聚乙烯袋或定制的冷藏水箱运输。虽然运输后3天的存活率差异很大（1.5-100 %），但一个关键的发现是，无论采用何种捕获方法或运输系统，运输前较长的适应期对于实现高（100 %）存活率至关重要。本研究为开展短鳍鱼的圈养繁殖计划提供健康的亲鱼提供了重要的基础。

引用次数: 0