Regional Studies in Marine Science最新文献_第6页

Differences in the impact of intense ENSO+ in Bahia Magdalena (SW of Baja California, Mexico) in the context of climate change 气候变化背景下强烈厄尔尼诺/南方涛动+对巴伊亚马格达莱纳（墨西哥下加利福尼亚西南部）影响的差异

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-11 DOI: 10.1016/j.rsma.2024.103864

María del Carmen Jiménez-Quiroz , Francisco Javier Barrón-Barraza , Rafael Cervantes-Duarte , René Funes-Rodríguez , Rogelio González-Armas

The Bahia Magdalena-Bahia Almejas (BM-BA) complex is the largest coastal lagoon system in the Mexican Pacific; it is in a transitional zone between temperate and tropical regions. BM-BA has a high biodiversity and is an important source of fishing resources; however, its productivity diminishes during ENSO+ events. This work aimed to compare the impact of the three most intense ENSOs (1982–1983, 1997–1998, and 2015–2016) on their environmental and biological characteristics in the context of global warming. Since 1970, this region has been warming, and the chlorophyll-a is diminishing; however, short-term environmental variations associated with basin-scale processes have modified these trends. The comparison showed that the equatorial influence on the 1997–1998 ENSO was more evident, while the North Pacific conditions and other large-scale environmental processes influenced the other ENSOs: in 1982–1983, the warm signal continued after the ENSO+ ended, and in 2015–2016, it was present before the ENSO+ onset due to the MWH The Blob and probably global warming. High temperatures at the basin scale altered large-scale wind patterns, weakening local upwelling and diminishing the nutrient input. The Equatorial and North Pacific influence on BM varies over time (as expected in a transition zone like BM); however, in recent years, North Pacific warming associated with climate change has probably gained relevance and modulated the effect of ENSO+.

马格达莱纳湾-阿尔梅哈斯湾（BM-BA）综合体是墨西哥太平洋最大的沿海泻湖系统；它位于温带和热带地区之间的过渡地带。BM-BA 具有高度的生物多样性，是重要的渔业资源来源；然而，在 ENSO+ 事件期间，其生产力会下降。这项工作旨在比较全球变暖背景下三次最强烈的厄尔尼诺/南方涛动（1982-1983 年、1997-1998 年和 2015-2016 年）对其环境和生物特征的影响。自 1970 年以来，该地区一直在变暖，叶绿素-a 也在减少；然而，与流域尺度过程相关的短期环境变化改变了这些趋势。对比结果显示，赤道对 1997-1998 年厄尔尼诺/南方涛动的影响更为明显，而北太平洋条件和其他大尺度环境过程则影响了其他厄尔尼诺/南方涛动：1982-1983 年，暖信号在厄尔尼诺/南方涛动+结束后继续存在，而 2015-2016 年，由于 MWH The Blob 以及可能的全球变暖，暖信号在厄尔尼诺/南方涛动+开始前就已存在。海盆尺度的高温改变了大尺度风的模式，削弱了当地的上升流，减少了营养物质的输入。赤道和北太平洋对 BM 的影响随着时间的推移而变化（这在 BM 这样的过渡区是预料之中的）；然而，近年来，与气候变化相关的北太平洋变暖可能变得越来越重要，并调节了 ENSO+ 的影响。

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引用次数: 0

Biodiversity associated with a coralligenous build-up off Sicily (Ionian Sea) 与西西里岛（爱奥尼亚海）附近珊瑚堆积有关的生物多样性

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-11 DOI: 10.1016/j.rsma.2024.103868

Gemma Donato , Rossana Sanfilippo , Daniela Basso , Pietro Bazzicalupo , Marco Bertolino , Valentina Alice Bracchi , Mara Cipriani , Francesco D’Alpa , Adriano Guido , Mauro Pietro Negri , Francesco Sciuto , Donatella Serio , Antonietta Rosso

Coralligenous is one of the most important habitats of the Mediterranean Sea hosting a very high biodiversity that, however, has not been fully investigated yet. The paper addressed the study of the biodiversity of a coralligenous bioconstruction collected at a depth of 36.7 m off Marzamemi (SE Sicily, Ionian Sea). The species diversity, composition and structure of the main associated taxonomic groups were investigated in order to identify possible differences between the communities of the hard framework (mainly built by calcified corallinales) and the canopy cover. The examined build-up showed significant species diversity for almost all groups. Bryozoans were the most diversified group and, together with foraminifers, also the most abundant both on the canopy and the frame. Further groups showed high species diversity (except for serpulids) and total abundance (except for molluscs) on the canopy rather than on the frame. Due to their different nature and microenvironmental parameters, the canopy and the frame hosted different communities. Besides juvenile specimens, the canopy mostly hosted unmineralized and weakly mineralized, small-sized, short-lived species well adapted to living on ephemeral and flexible substrates. On the contrary, the rigid and persistent frame mostly hosted highly mineralized, large, long-lived species, which usually contributed to the building and strengthening of the bioconstruction. Unlike mapping and monitoring, a thorough description of coralligenous biodiversity requires accurate naked eye and microscopical analysis assisted by SEM investigation due to the small size and cryptic behaviour of several species.

珊瑚礁是地中海最重要的栖息地之一，具有极高的生物多样性，但尚未得到充分研究。本文研究了在 Marzamemi（西西里岛东南部，爱奥尼亚海）36.7 米深处采集的珊瑚生物构造的生物多样性。对主要相关分类群的物种多样性、组成和结构进行了调查，以确定硬框架（主要由钙化珊瑚虫构建）和冠层覆盖的群落之间可能存在的差异。经研究发现，几乎所有群落的物种多样性都很丰富。毛环节动物是种类最丰富的类群，与有孔虫一起也是冠层和框架上最丰富的类群。其他类群在冠层上的物种多样性（蛇形目除外）和总丰度（软体动物除外）都比在框架上高。由于其性质和微环境参数不同，冠层和框架上的群落也不同。除了幼体标本外，冠层上大多栖息着未矿化和弱矿化、体型小、寿命短的物种，这些物种非常适合生活在短暂而灵活的基质上。与此相反，坚硬而持久的骨架上大多栖息着矿化度高、体型大、寿命长的物种，它们通常有助于构建和加强生物结构。与绘图和监测不同，由于一些物种体积小、行为隐蔽，要彻底描述珊瑚生物多样性，需要准确的肉眼和显微镜分析，并辅以扫描电镜调查。

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引用次数: 0

How environmental data enables intelligent navigation: Factors assessment of affecting the navigation in the Northeast Arctic Route 环境数据如何实现智能导航：影响北极东北航道航行的因素评估

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-10 DOI: 10.1016/j.rsma.2024.103861

Jihong Chen , Xitao Zhang , Lang Xu , Shanshan Fu

Due to the more favorable navigational environment and higher safety along Northeast Arctic Route, this route is being used more and more frequently for international shipping. In this research, the factor analysis method is applied to assess the navigational environment of each sea area in the Northeast Arctic Route, revealing the effects of Arctic navigation influence factor on the navigational environment, and analyzing the change trend of the navigational environment of different sea areas in different seasons. Further, the effects of multiple factors on the number of voyages are discussed through multiple stepwise regression model, including the navigational environment score, geopolitical risk, export & import trade and the probability of pollution accidents, then the Interrupted time series analysis (ITSA) method combined with seasonal decomposition is explored the effect of emergencies on the number of voyages on the Northeast Arctic Route. The number of voyages on the Northeast Arctic Route has been altered to varying degrees by the occurrence of various emergencies. Further, the Yamal LNG project and the Russian-Ukrainian conflict have a significant effect on the number of voyages, while the Covid-19 epidemic has a lesser effect on the number of voyages.

由于北极东北航道沿线通航环境较好，安全性较高，国际航运对该航道的使用越来越频繁。本研究采用因子分析法对北极东北航道各海区的通航环境进行了评估，揭示了北极通航影响因子对通航环境的影响，分析了不同季节不同海区通航环境的变化趋势。此外，还通过多元逐步回归模型讨论了通航环境评分、地缘政治风险、出口贸易、进口贸易和污染事故概率等多个因素对航次的影响，并结合季节分解的中断时间序列分析（ITSA）方法探讨了突发事件对北极东北航道航次的影响。北极东北航线的航行次数因各种紧急情况的发生而发生了不同程度的变化。此外，亚马尔液化天然气项目和俄乌冲突对航次的影响较大，而 Covid-19 疫情对航次的影响较小。

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引用次数: 0

Unveiling hidden threats: Assessing the risks of potentially toxic elements (PTEs) in contaminated fish of the Anzali Wetland 揭示隐藏的威胁：评估安扎利湿地受污染鱼类中潜在有毒元素 (PTE) 的风险

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-10 DOI: 10.1016/j.rsma.2024.103853

Fatemeh Salehi , Saeed Sharafi , Ali Kazemi , Milad Esmaeilbeigi

The environmental degradation caused by potentially toxic elements (PTEs) and its consequential health risks to humans and the environment have raised profound concerns. To explore the potential hazards associated with PTEs, we analyzed the total concentration of As, Cd, Cr, Hg, and Pb in the muscle, gills, viscera, and eggs of four fish species Esox lucius Linnaeus, 1758 (Pike), Cyprinus carpio Linnaeus, 1758 (Carp), Vimba vimba Linnaeus, 1758 (Vimba), and Tinca tinca Linnaeus, 1758 (Tinca) collected from the Anzali Wetland. We measured the concentrations of trace metals in the fish samples and calculated the associated human health risks and compared the results with the international standards. Our findings showed the PTEs concentrations in fish samples with Cr > Hg > Pb > Cd >As. We observed Cr, Hg, and Pb concentrations (3.4 ± 1.61, 2.57 ± 1.24, and 1.7 ± 0.48 μg g⁻¹ wet weight (w.w.), respectively) in muscle samples, Cd concentration (1.05 ± 0.53 μg g⁻¹ w.w.) in eggs, and As concentration (0.40 ± 0.13 μg g⁻¹ w.w.) in viscera of Pike. Consequently, Pike exhibited the highest concentrations of these metals across all its sampled tissues. Comparing the results to the standard set by the World Health Organization (WHO) declared that the average heavy metal concentrations exceeded the permissible limits for certain elements. Results also indicated that the concentrations of As and Pb in all fish species posed potential health risks, particularly to children, with a target hazard quotient THQ> 1. Moreover, the presence of As and Pb metals in all human age groups, as well as Cr and Hg metals, indicated a potential risk of cancer for children (Cr > 1E-4). Therefore, the metal pollution status of the Anzali Wetland not only influences the biodiversity of fish but potentially poses health-related issues to the target consumers.

潜在有毒元素（PTEs）导致的环境恶化及其对人类和环境造成的健康风险引起了人们的深切关注。为了探究潜在有毒元素的潜在危害，我们分析了从安扎里湿地采集的四种鱼类：林尼厄斯-1758（梭鱼）、林尼厄斯-1758（鲤鱼）、林尼厄斯-1758（温巴鱼）和林尼厄斯-1758（丁卡鱼）的肌肉、鱼鳃、内脏和鱼卵中的砷、镉、铬、汞和铅的总浓度。我们测量了鱼类样本中的痕量金属浓度，计算了相关的人类健康风险，并将结果与国际标准进行了比较。我们的研究结果表明，鱼类样本中的 PTEs 浓度为 Cr > Hgt > Pb > Cd > As。我们在梭子鱼肌肉样本中观察到铬、汞和铅浓度（分别为 3.4 ± 1.61、2.57 ± 1.24 和 1.7 ± 0.48 μg g-1 湿重），在鱼卵中观察到镉浓度（1.05 ± 0.53 μg g-1 湿重），在内脏中观察到砷浓度（0.40 ± 0.13 μg g-1 湿重）。因此，梭子鱼所有采样组织中这些金属的浓度最高。将结果与世界卫生组织（WHO）规定的标准进行比较后发现，重金属的平均浓度超出了某些元素的允许限值。结果还表明，所有鱼类物种中的砷和铅浓度都对健康构成了潜在风险，尤其是对儿童而言，其目标危害商数为 THQ>1。此外，所有年龄组的人体内都存在砷和铅金属，以及铬和汞金属，这表明儿童有患癌的潜在风险（铬>1E-4）。因此，安扎利湿地的金属污染状况不仅影响鱼类的生物多样性，还可能对目标消费者的健康造成影响。

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引用次数: 0

Assessing ecological risks and microplastic pollution in a tropical coastal ecosystem: Effects of rainfall variability in Southeast India 评估热带沿海生态系统的生态风险和微塑料污染：印度东南部降雨量变化的影响

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-10 DOI: 10.1016/j.rsma.2024.103858

Partheeban Emmanuel Charles, Rajendran Rajaram

Microplastic pollution poses a significant threat to coastal ecosystems, prompting an in-depth investigation into its seasonal fluctuations and ecological impacts. This study examines microplastics in Cuddalore’s coastal waters and sediments across four seasons. Results show varying microplastic concentrations, peaking during the monsoon and pre-monsoon seasons, likely influenced by rainfall variability. Fibers dominate in both water (69–100 %) and sediment samples (66–92 %), with polyethylene and polyethylene terephthalate as the predominant polymer types in water. Sediments exhibit a more diverse polymer distribution, with polypropylene and polyethylene terephthalate being prevalent. Elevated polymer hazard index and potential ecological risk index raise concerns, reaching values of 108930 and 1125, respectively. This underscores the urgency of implementing effective management strategies to safeguard tropical coastal ecosystems from microplastic pollution. This study highlights the complex interplay between seasonal dynamics, rainfall variability, polymer types, and pollution levels, emphasizing the need for proactive environmental management measures.

微塑料污染对沿海生态系统构成重大威胁，促使人们对其季节性波动和生态影响进行深入调查。本研究对 Cuddalore 沿海水域和沉积物中的微塑料进行了四季研究。结果显示，微塑料的浓度各不相同，在季风季节和季风前期达到峰值，这可能是受降雨量变化的影响。纤维在水样（69%-100%）和沉积物样本（66%-92%）中都占主导地位，聚乙烯和聚对苯二甲酸乙二酯是水中最主要的聚合物类型。沉积物中的聚合物分布更为多样，主要是聚丙烯和聚对苯二甲酸乙二醇酯。聚合物危害指数和潜在生态风险指数升高，分别达到 108930 和 1125，令人担忧。这凸显了实施有效管理策略以保护热带沿海生态系统免受微塑料污染的紧迫性。这项研究凸显了季节动态、降雨量变化、聚合物类型和污染水平之间复杂的相互作用，强调了采取积极的环境管理措施的必要性。

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引用次数: 0

Heavy metals toxicity in edible bivalves and risk exposure to humans through its consumption from Adyar Estuary, Tamilnadu, India – A baseline study 印度泰米尔纳德邦阿迪亚尔河口可食用双壳贝中的重金属毒性以及人类通过食用双壳贝接触重金属的风险 - 一项基线研究

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-10 DOI: 10.1016/j.rsma.2024.103854

Tamil Selvan Chandrasekaran , John Milton , Bharathi Santhanabharathi , Kumara Perumal Pradhoshini , Louis Cojandaraj , Marckasagayam Priyadharshini , Munawar Suhail Ahmed , Mohamed Saiyad Musthafa , Paulraj Balaji , Caterina Faggio

The Adyar estuary, situated at the heart of Chennai city, India, has been subjected to significant anthropogenic pollution over the past decade due to rapid urbanization and industrialization.

This study endeavored to explore the bioaccumulation patterns of heavy metals within bivalve species including Perna viridis, Mercenaria mercenaria, and Lamellidens marginalis. Additionally, it aimed to assess the concentrations of heavy metals present in water samples obtained from ten discrete stations within the Adyar estuary across different seasonal periods. To better understand the dynamics of contamination, metal pollutants including Cd, B, Cu, Fe, Mn, Pb, and Zn were analyzed in the soft tissues (Gill, Kidney, and Muscle) of the bivalves using Atomic Absorption Spectrophotometer (AAS) (ELICO's SL- 176). The study also investigated the seasonal changes in biochemical constituents affecting the nutritional quality of these edible bivalves following conventional methods, and estimated the risk (both carcinogenic and non-carcinogenic) to consumers. Results showed that the biochemical constituents of Perna viridis and Mercenaria mercenaria were comparatively lower than those of the freshwater bivalve Lamellidens Marginalis (p > 0.05). Heavy metal accumulation in the mussels followed the order Mn > Zn > Cu > Pb > Fe > Cd > B. The highest uptake of metals by the bivalves occurred during the post-monsoon season, while the least uptake was observed during the monsoon season. The overall metal burden for the studied species followed the descending order M. mercenaria > P. viridis > L. marginalis. The study indicated that both carcinogenic and non-carcinogenic risks to humans from consuming these mussels were higher due to the excessive accumulation of metals Zn and Mn in all three studied bivalves.

阿迪雅河口位于印度钦奈市的中心地带，在过去的十年中，由于快速的城市化和工业化，该河口受到了严重的人为污染。本研究旨在探索重金属在双壳类动物（包括Perna viridis、Mercenaria mercenaria和Lamellidens marginalis）体内的生物累积模式。此外，该研究还旨在评估从阿迪亚河口十个离散站采集的水样中不同季节所含重金属的浓度。为了更好地了解污染的动态，使用原子吸收分光光度计（AAS）（ELICO SL- 176）分析了双壳类动物软组织（鳃、肾和肌肉）中的镉、硼、铜、铁、锰、铅和锌等金属污染物。研究还采用传统方法调查了影响这些食用双壳贝营养质量的生化成分的季节性变化，并估算了对消费者的风险（致癌和非致癌）。结果表明，Perna viridis 和 Mercenaria mercenaria 的生化成分相对低于淡水双壳贝 Lamellidens Marginalis（p > 0.05）。双壳贝类对重金属的吸收量在季风后季节最高，而在季风季节最低。研究物种的总体金属负荷从高到低依次为 M. mercenaria > P. viridis > L. marginalis。研究表明，食用这些贻贝对人类的致癌和非致癌风险都较高，这是因为在所有三种研究的双壳贝中，金属锌和锰的累积量都过高。

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引用次数: 0

Onboard test-based exhaust emission factors for marine diesel engines on anchor handling tug supply vessels 基于船上测试的船用柴油发动机废气排放系数，适用于锚处理拖船补给船

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-09 DOI: 10.1016/j.rsma.2024.103866

Yaoqi Kang , Bo Wang , Shuqiang Liu , Mingliang Chen , Zixiao Ye , Zibin Yin

In order to accurately assess China’s port air pollution caused by AHTS (Anchor Handling Tug Supply Vessels) ships, 46 diesel engines on 27 AHTS ships were tested for onboard emissions using a large gas analyzer to statistically analyze their fuel-based and power-based emission factors. The results show that fuel-based NOx-emission factors for MEs, SEs and AEs before and after the use of the SCR system are 45.4, 38.24,33.04 g/kg and 6.35, 4.98, 5.82 g/kg, CO-emission factors are 7.95, 6.30, 7.96 g/kg and 6.90, 6.93, 8.32 g/kg, THC-emission factors are 0.49, 0.64, 0.25 g/kg and 0.42, 0.47, 0.22 g/kg, and CO₂-emission factors are 3121.62, 3121.34, 3093.12 g/kg and 3088.14,3091.40, 3085.21 g/kg, respectively. Power-based NOx-emission factors for MEs, SEs and AEs before and after the use of the SCR system are 9.71, 8.61, 7.58 g/(kW·h) and 1.37, 1.23, 1.33 g/(kW·h), CO-emission factors are 1.71, 2.08, 1.84 g/(kW·h) and 1.47, 1.53, 1.93 g/(kW·h), THC-emission factors are 0.10, 0.14, 0.05 g/(kW·h) and 0.09, 0.13, 0.06 g/(kW·h), and CO₂-emission factors are 671.73, 700.58, 718.46 g/(kW·h) and 664.42, 694.16, 716.92 g/(kW·h), respectively. The power-based emission factor is closely related to the diesel engine load, and the relationship between different exhaust emissions and diesel engine load shows different patterns. In addition, it was found that the NOx emissions of the ship decreased significantly to meet the IMO Tier III requirements after running SCR. The emission factors of CO, HC and CO₂ have no obvious change whether SCR systems were operated or not. The AHTS marine engine emission factors obtained in this paper are highly relevant and can provide reliable data for establishing a suitable emission inventory for medium and high speed engineering support vessels.

为了准确评估中国港口 AHTS（锚吊拖轮补给船）造成的空气污染，我们使用大型气体分析仪对 27 艘 AHTS 船舶上的 46 台柴油发动机进行了船上排放测试，统计分析其基于燃料和基于动力的排放因子。结果显示，在使用选择性催化还原系统前后，ME、SE 和 AE 的燃料型氮氧化物排放因子分别为 45.4、38.24、33.04 g/kg 和 6.35、4.98、5.82 g/kg，CO 排放因子分别为 7.95、6.30、7.THC 排放因子分别为 0.49、0.64、0.25 g/kg 和 0.42、0.47、0.22 g/kg，CO2 排放因子分别为 3121.62、3121.34、3093.12 g/kg 和 3088.14、3091.40、3085.21 g/kg。使用选择性催化还原系统前后，ME、SE 和 AE 基于功率的氮氧化物排放因子分别为 9.71、8.61、7.58 g/（kW-h）和 1.37、1.23、1.33 g/（kW-h），CO 排放因子分别为 1.71、2.08、1.84 g/（kW-h）和 1.47、1.53、1.93 g/（kW-h）。THC 排放因子分别为 0.10、0.14、0.05 g/（kW-h）和 0.09、0.13、0.06 g/（kW-h），CO2 排放因子分别为 671.73、700.58、718.46 g/（kW-h）和 664.42、694.16、716.92 g/（kW-h）。基于功率的排放因子与柴油机负荷密切相关，不同废气排放与柴油机负荷的关系呈现出不同的规律。此外，研究还发现，运行选择性催化还原技术后，船舶的氮氧化物排放量明显下降，达到了国际海事组织 Tier III 的要求。一氧化碳、碳氢化合物和二氧化碳的排放因子在是否运行选择性催化还原系统的情况下没有明显变化。本文获得的 AHTS 船用发动机排放因子具有很强的相关性，可为建立合适的中高速工程辅助船排放清单提供可靠数据。

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引用次数: 0

Biological traits and functional diversity of free-living nematode assemblages along a water-depth gradient in the northwestern of Gulf of Mexico 墨西哥湾西北部沿水深梯度的自由生活线虫群落的生物特征和功能多样性

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-08 DOI: 10.1016/j.rsma.2024.103860

Abel Abraham Vargas-Espositos, Alberto de Jesús-Navarrete, Wilbert Andrés Pérez-Pech, Abril Anguas-Escalante

This study analyzed the biological traits (BTs) and functional diversity (FD) of free-living nematodes in the northwestern of Gulf of Mexico. We collected sediment samples at 27 sites at a depth gradient from 44 to 3466 m. The nematodes were identified at species level and classified in five groups of BTs: feeding type, amphid shape, tail shape, body shape, and body length. We determined the FD based on the combination of BTs through a functional dendrogram, using the total length of the branch as a measure of functional diversity. Salinity, pH, and dissolved oxygen were measured in each site, as well as the sediment composition and percentage of organic carbon (OC). A total of 1673 nematodes were identified, belonging to 35 families, 96 genera, and 153 species. The number of species varied along water depth (1–60 species). The more abundant BTs were the non-selective deposit feeders (49 %), amphid spiral shape (55 %), clavate conical cylindrical tail (52 %), sizes 1000–1500 μm (51 %), and body shape slender (97 %). The most common combination of traits was non-selective deposit feeders, spiral amphid, clavate conical cylindrical tail, slender shape, and sizes < 1500 μm. The changes of BTs with increasing depth were more evident in the feeding types and amphid shape. The FD fluctuated between sites (0.42–0.99) and was significantly correlated with the number of species, suggesting that taxonomic and functional diversity have similar responses to environmental variables. The FD was significantly influenced only by the percentage of sands. Our data provide valuable information that can be used in subsequent studies and benthos monitoring.

本研究分析了墨西哥湾西北部自由生活线虫的生物特征（BTs）和功能多样性（FD）。我们在深度梯度从 44 米到 3466 米的 27 个地点采集了沉积物样本。我们对线虫进行了物种鉴定，并将其分为五组 BT：摄食类型、两栖动物形状、尾部形状、体形和体长。我们通过功能树枝图确定了基于 BTs 组合的 FD，使用分支总长度作为功能多样性的衡量标准。我们测量了每个地点的盐度、pH 值和溶解氧，以及沉积物成分和有机碳（OC）百分比。共鉴定出 1673 种线虫，隶属于 35 科、96 属和 153 种。物种数量随水深而变化（1-60 种）。数量较多的 BT 为非选择性沉积摄食者（49%）、两栖螺旋形（55%）、棍棒状圆锥圆柱尾（52%）、大小 1000-1500 μm（51%）和体形细长（97%）。最常见的性状组合是非选择性沉积摄食者、螺旋状两栖类、棍棒状圆锥形尾、体形细长、体长为 < 1500 μm。随着深度的增加，BTs 的变化在取食类型和两栖类形状上更为明显。FD在不同地点之间波动（0.42-0.99），并与物种数量显著相关，表明分类和功能多样性对环境变量的反应相似。只有沙的百分比对 FD 有明显影响。我们的数据提供了宝贵的信息，可用于后续研究和底栖动物监测。

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引用次数: 0

Spatial inhomogeneity analyses of extreme sea levels along Lianyungang coast based on numerical simulation and Monte Carlo model 基于数值模拟和蒙特卡洛模型的连云港沿海极端海平面空间不均匀性分析

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-06 DOI: 10.1016/j.rsma.2024.103856

Baiwen Liu, Sudong Xu, Kai Yin

The prediction of extreme sea levels in coastal areas has been a prominent requirement of coastal engineering design and planning. The research was based on the frequent disasters caused by typhoon storm surges in China and the demand for reasonable improvement of port structures in coastal areas. Delft3D hydrodynamic model and the Monte Carlo model were integrated to predict the spatial distribution of extreme sea levels along the coast of Lianyungang city in Jiangsu province. The Monte Carlo model was adopted to generate stochastic typhoon characteristic sequences as meteorological driving forces. In the hydrodynamic model, meteorological factors were coupled with the astronomical tide to simulate storm surge scenarios. Extreme sea levels were estimated by ranking maximum levels of simulated storm surge events. This programming was feasible compared to the prediction results of frequency analysis methods. The research showed that the predicted 1 in 100-year extreme sea level of Lianyungang station was 3.75 m, while the predicted 1 in 200-year value was 3.85 m. The programming was adopted to predict extreme sea levels of several stations and analyze the spatial distribution characteristics of extreme sea levels in four port areas of Lianyungang Port. Results revealed that extreme sea levels in modeling areas had significant spatial inhomogeneity, which might be related to the concavity of coastlines, islands, and terrains. Estimating spatial extreme sea levels could better cognize the influence of inundation disasters in coastal areas and be conducive to the design of port structures and the safety of port operations.

预测沿海地区的极端海平面一直是海岸工程设计和规划的突出要求。本研究基于我国台风风暴潮灾害频发的现状和合理改善沿海地区港口结构的需求。将 Delft3D 流体动力模型和 Monte Carlo 模型相结合，预测了江苏省连云港市沿海极端海平面的空间分布。采用蒙特卡洛模型生成随机台风特征序列作为气象驱动力。在水动力模型中，气象因素与天文潮汐耦合，模拟风暴潮情景。通过对模拟风暴潮事件的最高水位进行排序，估算出极端海平面。与频率分析方法的预测结果相比，这种编程方法是可行的。研究表明，连云港站 100 年一遇的极端海平面预测值为 3.75 米，200 年一遇的极端海平面预测值为 3.85 米。采用程序设计法预测了多个站点的极端海平面，并分析了连云港港四个港区极端海平面的空间分布特征。结果表明，建模区域的极端海平面具有明显的空间不均匀性，这可能与海岸线、岛屿和地形的凹凸有关。估算空间极端海平面可以更好地认识沿海地区淹没灾害的影响，有利于港口结构设计和港口作业安全。

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引用次数: 0

Can automatic measuring replace humans when evaluating a shrimp fishery? 在评估捕虾渔业时，自动测量能否取代人工？

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-05 DOI: 10.1016/j.rsma.2024.103852

Bent Herrmann , Elling Ruud Øye , Jonatan Sjølund Dyrstad , Anja Helene Alvestad

Size measurements of fish and crustacean species play a critical role in fishery stock assessments, fishing gear size selectivity studies, and monitoring compliance with fisheries management regulations. One such example is from shrimp fisheries where samples of trawl-caught shrimps are frequently collected and size measured. However, the manual measurement of hundreds of small shrimps per sample is time-consuming and exhausting. Therefore, this study evaluates whether an automatic measuring procedure using off-the-shelf camera technology and a general-purpose artificial intelligence algorithm can replace manual measurements of deep-water shrimp (Pandalus borealis). Despite some deviations between manual and automatic measurements for individual shrimps, the automatic method proved sufficiently accurate for stock, gear selectivity and compliance assessment. Furthermore, this study demonstrated how a use-case driven approach can be applied when evaluating whether a new measuring technology can replace an existing.

鱼类和甲壳类物种的尺寸测量在渔业资源评估、渔具尺寸选择性研究和监测渔业管理法规遵守情况方面发挥着至关重要的作用。其中一个例子是捕虾业，经常收集拖网捕获的小虾样本并进行尺寸测量。然而，人工测量每个样本中的数百只小虾既费时又费力。因此，本研究评估了使用现成相机技术和通用人工智能算法的自动测量程序能否取代人工测量深水对虾（Pandalus borealis）。尽管人工测量和自动测量对虾个体存在一些偏差，但自动测量方法被证明对种群、渔具选择性和合规性评估足够准确。此外，这项研究还展示了在评估一项新的测量技术是否能取代现有技术时，如何采用用例驱动法。

引用次数: 0