Regional Studies in Marine Science最新文献_第9页

Cases of oil spills in the Indonesian coastal area: Ecological impacts, health risk assessment, and mitigation strategies 印度尼西亚沿海地区的石油泄漏案例：生态影响、健康风险评估和缓解策略

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-23 DOI: 10.1016/j.rsma.2024.103835

Setyo Budi Kurniawan , Muhammad Fauzul Imron , Ali Roziqin , Dwi Sasmita Aji Pambudi , Benedicta Dian Alfanda , Mahasin Maulana Ahmad , Fatmalia Khoirunnisa , Rizka Andriani Mahmudah , Rizkiy Amaliyah Barakwan , Hajjar Hartini Wan Jusoh , Hafizan Juahir

Oil is still the main source of energy in various sectors, such as transportation, industries, and electricity. As one of the developing countries, Indonesia has enormous activities related to oil, including drilling, transporting, and refining. This paper aimed to provide a review of the cases of oil spills in the Indonesian coastal area as an impact of oil-related activities. Most of the Indonesian oil spill cases occurred due to tanker leakage, pipe leakage, and ship accidents. Most of the well-documented and reported cases of oil spills in the Indonesian coastal area occurred in Java Region, with PT Pertamina (a government-owned oil and gas company) and its subsidiaries being the primary parties commonly involved in the accidents. The ecological impacts of the oil spill, including those on plankton, benthos, fish, birds, and vegetation, are then elaborated in detail. Additionally, health risks to humans are also intensively discussed, presenting acute and long-term exposure effects. This paper presents oil spill management strategies, focusing on the mitigations and regulations related to previous cases, in which cleanup operations and financial compensations were the most frequently implemented mitigation efforts. This paper also lists the options for technologies, including physical, chemical, and biological methods, in an effort to clean up oil spills. Monitoring the adverse effects of oil spills on human health and creating local-specific contingency plans are suggested to be conducted for future research directions.

石油仍然是交通运输、工业和电力等各个领域的主要能源。作为发展中国家之一，印度尼西亚有大量与石油有关的活动，包括钻探、运输和提炼。本文旨在回顾印尼沿海地区因石油相关活动而造成的石油泄漏案例。印尼的大多数漏油事件都是由于油轮泄漏、管道泄漏和船舶事故造成的。印尼沿海地区大多数有据可查和报告的漏油事件都发生在爪哇地区，PT Pertamina（一家政府所有的石油和天然气公司）及其子公司是事故的主要当事方。随后，详细阐述了溢油对生态的影响，包括对浮游生物、底栖生物、鱼类、鸟类和植被的影响。此外，还深入讨论了对人类健康的风险，介绍了急性和长期接触的影响。本文介绍了漏油管理策略，重点是与以往案例相关的缓解措施和法规，其中清理作业和经济补偿是最常实施的缓解措施。本文还列出了清理油类泄漏的各种技术选择，包括物理、化学和生物方法。建议在未来的研究方向中监测油类泄漏对人类健康的不利影响，并制定针对当地的应急计划。

{"title":"Cases of oil spills in the Indonesian coastal area: Ecological impacts, health risk assessment, and mitigation strategies","authors":"Setyo Budi Kurniawan , Muhammad Fauzul Imron , Ali Roziqin , Dwi Sasmita Aji Pambudi , Benedicta Dian Alfanda , Mahasin Maulana Ahmad , Fatmalia Khoirunnisa , Rizka Andriani Mahmudah , Rizkiy Amaliyah Barakwan , Hajjar Hartini Wan Jusoh , Hafizan Juahir","doi":"10.1016/j.rsma.2024.103835","DOIUrl":"10.1016/j.rsma.2024.103835","url":null,"abstract":"<div><div>Oil is still the main source of energy in various sectors, such as transportation, industries, and electricity. As one of the developing countries, Indonesia has enormous activities related to oil, including drilling, transporting, and refining. This paper aimed to provide a review of the cases of oil spills in the Indonesian coastal area as an impact of oil-related activities. Most of the Indonesian oil spill cases occurred due to tanker leakage, pipe leakage, and ship accidents. Most of the well-documented and reported cases of oil spills in the Indonesian coastal area occurred in Java Region, with PT Pertamina (a government-owned oil and gas company) and its subsidiaries being the primary parties commonly involved in the accidents. The ecological impacts of the oil spill, including those on plankton, benthos, fish, birds, and vegetation, are then elaborated in detail. Additionally, health risks to humans are also intensively discussed, presenting acute and long-term exposure effects. This paper presents oil spill management strategies, focusing on the mitigations and regulations related to previous cases, in which cleanup operations and financial compensations were the most frequently implemented mitigation efforts. This paper also lists the options for technologies, including physical, chemical, and biological methods, in an effort to clean up oil spills. Monitoring the adverse effects of oil spills on human health and creating local-specific contingency plans are suggested to be conducted for future research directions.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bioaccumulation of natural radionuclides in edible molluscs and associated risk from the Ashtamudi Estuary, situated in a high background natural radiation zone (HBNRA), Kerala, southwest coast of India 印度西南海岸喀拉拉邦高本底天然辐射区（HBNRA）阿什塔穆迪河口可食用软体动物体内天然放射性核素的生物累积及相关风险

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-22 DOI: 10.1016/j.rsma.2024.103833

Jayaseeli Malar Adaikalam, Yaseen Nawaz Shareef, Mohan Feroz Khan

The study investigated various natural radionuclides, including ²³⁸U, ²³²Th, ²¹⁰Po, and ²¹⁰Pb, in edible molluscan species collected from different zones of the Ashtamudi estuary. Physicochemical and sedimentological factors played crucial roles in influencing the distribution of radionuclides in water and sediments. Notably, bivalve species, particularly those from the Cyrenidae family, exhibited significant bioaccumulation of ²¹⁰Po (up to 432.8 Bq kg⁻¹) and ²¹⁰Pb (up to 121.3 Bq kg⁻¹), with Zone VI recording the highest biological concentration factor (BCF) and biological sediment accumulation factor (BSAF). The calculated effective dose for humans consuming bivalve meat was moderate, falling above the lower end of the ICRP range of 1 mSv y⁻¹ but well below the upper limit of 20 mSv y⁻¹ for existing elevated radiation zones. The intake of radioactivity from some bivalves corresponded to a cancer risk of approximately 3.2 × 10⁻² (total mortality + morbidity), exceeding the acceptable risk threshold reported by the USEPA. However, this level of exposure indicated that immediate action might not be necessary, especially if further dose reduction proved impractical, in line with the ICRP's approach to optimizing radiation protection.

研究调查了从阿什塔穆迪河口不同区域采集的可食用软体动物物种体内的各种天然放射性核素，包括 238U、232Th、210Po 和 210Pb。物理化学和沉积物因素在影响放射性核素在水和沉积物中的分布方面发挥了关键作用。值得注意的是，双壳贝类，尤其是鲤科双壳贝类，对 210Po（高达 432.8 Bq kg-1）和 210Pb（高达 121.3 Bq kg-1）表现出显著的生物累积性，其中第六区的生物浓缩系数（BCF）和生物沉积物累积系数（BSAF）最高。计算得出的人类食用双壳贝肉的有效剂量适中，高于国际放射防护委员会 1 mSv y-1 的下限，但远低于现有高辐射区 20 mSv y-1 的上限。从一些双壳贝类摄入的放射性相当于约 3.2 × 10-2 的癌症风险（总死亡率 + 发病率），超过了美国环保局报告的可接受风险阈值。不过，这一辐照水平表明，可能没有必要立即采取行动，特别是在进一步减少剂量证明不切实际的情况下，这符合国际辐射防护委员会优化辐射防护的方法。

{"title":"Bioaccumulation of natural radionuclides in edible molluscs and associated risk from the Ashtamudi Estuary, situated in a high background natural radiation zone (HBNRA), Kerala, southwest coast of India","authors":"Jayaseeli Malar Adaikalam, Yaseen Nawaz Shareef, Mohan Feroz Khan","doi":"10.1016/j.rsma.2024.103833","DOIUrl":"10.1016/j.rsma.2024.103833","url":null,"abstract":"<div><div>The study investigated various natural radionuclides, including <sup>238</sup>U, <sup>232</sup>Th, <sup>210</sup>Po, and <sup>210</sup>Pb, in edible molluscan species collected from different zones of the Ashtamudi estuary. Physicochemical and sedimentological factors played crucial roles in influencing the distribution of radionuclides in water and sediments. Notably, bivalve species, particularly those from the Cyrenidae family, exhibited significant bioaccumulation of <sup>210</sup>Po (up to 432.8 Bq kg<sup>−1</sup>) and <sup>210</sup>Pb (up to 121.3 Bq kg<sup>−1</sup>), with Zone VI recording the highest biological concentration factor (BCF) and biological sediment accumulation factor (BSAF). The calculated effective dose for humans consuming bivalve meat was moderate, falling above the lower end of the ICRP range of 1 mSv y<sup>−1</sup> but well below the upper limit of 20 mSv y<sup>−1</sup> for existing elevated radiation zones. The intake of radioactivity from some bivalves corresponded to a cancer risk of approximately 3.2 × 10<sup>−2</sup> (total mortality + morbidity), exceeding the acceptable risk threshold reported by the USEPA. However, this level of exposure indicated that immediate action might not be necessary, especially if further dose reduction proved impractical, in line with the ICRP's approach to optimizing radiation protection.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatio-temporal variation in mangrove crab diversity in five estuaries of Kerala, India 印度喀拉拉邦五个河口红树林蟹多样性的时空变化

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-21 DOI: 10.1016/j.rsma.2024.103830

K.P. Apreshgi , K.V Aneesh Kumar , Sileesh Mullasseri , Kurian Mathew Abraham

The present study investigated the community structure and faunal composition of mangrove crab assemblage of five estuaries in Kerala. Mangrove crabs were collected from different estuaries namely Puthuvype, Ayiramthengu, Dhalavapuram, Pullichira and Kottaramthuruth from January 2015 to December 2015. The numerical abundance was directly enumerated by handpicking crabs from the estuarial mangrove region from 100×100 cm quadrats from the estuarine mangrove regions. Thirteen brachyuran crab species were identified across the five estuaries, along with environmental and sedimentological parameters. Various diversity indices were calculated for spatial temporal comparisons. The study revealed that four of the estuaries exhibited similar crab species diversity, while Pullichira differed, displaying the lowest diversity due to habitat characteristics such as small islands or sand dunes and shallow depth. The calculated indices for species diversity, richness, dominance, evenness, taxonomic and phylogenetic relationships provide insights into the spatio-temporal variations of mangrove crab diversity. This study serves as a benchmark reference for future studies in these estuaries, and further monitoring and assessment of mangrove ecosystem health could support the development of ecosystem-based management strategies for deteriorating mangrove ecosystems.

本研究调查了喀拉拉邦五个河口的红树林蟹群落结构和动物组成。研究人员于2015年1月至2015年12月期间在不同的河口（即Puthuvype、Ayiramthengu、Dhalavapuram、Pullichira和Kottaramthuruth）采集了红树林蟹。从河口红树林区域的 100×100 厘米四分格中用手摘取螃蟹，直接计算数量丰度。确定了五个河口的 13 个糠虾蟹类物种以及环境和沉积物参数。计算了各种多样性指数，以进行时空比较。研究显示，其中四个河口的螃蟹物种多样性相似，而普利希拉河口则有所不同，由于小岛或沙丘和水深较浅等生境特征，其物种多样性最低。计算得出的物种多样性、丰富度、优势度、均匀度、分类学和系统发育关系指数有助于深入了解红树林螃蟹多样性的时空变化。这项研究为今后在这些河口的研究提供了基准参考，进一步监测和评估红树林生态系统的健康状况有助于为日益恶化的红树林生态系统制定基于生态系统的管理策略。

{"title":"Spatio-temporal variation in mangrove crab diversity in five estuaries of Kerala, India","authors":"K.P. Apreshgi , K.V Aneesh Kumar , Sileesh Mullasseri , Kurian Mathew Abraham","doi":"10.1016/j.rsma.2024.103830","DOIUrl":"10.1016/j.rsma.2024.103830","url":null,"abstract":"<div><div>The present study investigated the community structure and faunal composition of mangrove crab assemblage of five estuaries in Kerala. Mangrove crabs were collected from different estuaries namely Puthuvype, Ayiramthengu, Dhalavapuram, Pullichira and Kottaramthuruth from January 2015 to December 2015. The numerical abundance was directly enumerated by handpicking crabs from the estuarial mangrove region from 100×100 cm quadrats from the estuarine mangrove regions. Thirteen brachyuran crab species were identified across the five estuaries, along with environmental and sedimentological parameters. Various diversity indices were calculated for spatial temporal comparisons. The study revealed that four of the estuaries exhibited similar crab species diversity, while Pullichira differed, displaying the lowest diversity due to habitat characteristics such as small islands or sand dunes and shallow depth. The calculated indices for species diversity, richness, dominance, evenness, taxonomic and phylogenetic relationships provide insights into the spatio-temporal variations of mangrove crab diversity. This study serves as a benchmark reference for future studies in these estuaries, and further monitoring and assessment of mangrove ecosystem health could support the development of ecosystem-based management strategies for deteriorating mangrove ecosystems.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zooplankton in the Indian Sundarbans: Distribution, water parameters, threats and opportunities 印度孙德尔本斯的浮游动物：分布、水体参数、威胁与机遇

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-21 DOI: 10.1016/j.rsma.2024.103826

Shrayan Bhattacharjee , Pradipta Kumar Ghosh , Ankit Bhattacharyya , Pallab Ghosh , Ritam Kumar Meddya , Sourav Chatterjee , Richek Routh , Suraj Mondal , Banani Mandal , Arunava Mukherjee

Zooplankton plays crucial roles in the food web by transferring energy from primary producers to higher trophic levels. The Indian Sundarbans, being a large mangrove-estuarine ecosystem, harbors rich aquatic diversity but endures several threats from anthropogenic activities. The present review comprehensively summarizes the status of zooplankton in the Indian Sundarbans. This review discusses the distribution of zooplankton across rivers and tidal creeks/canals, the influences of water parameters, possible threats, and conservation proposals through potential long-term monitoring. Calanoid copepods (∼32.02 %) are predominant in the Indian Sundarbans, followed by Choreotrichida (∼17.8 %), Cyclopoida (∼8.67 %), Decapoda (∼7.55 %), and Harpacticoida (∼5.66 %). As per previous studies, calanoid Pseudodiaptomus serricaudatus is predominant in rivers, followed by Paracalanus parvus, Bestiolina similis, Acartia plumosa, and Acartiella tortaniformis. Salinity is the key water parameter influencing the assemblage and distribution of zooplankton in the Indian Sundarbans. Zooplankton in this region face several threats, such as pollution, natural disasters, and the development of river dykes, which may raise serious concerns about their survival. This review recommends conservation and long-term monitoring programs, including mass culture, database development, and the use of advanced techniques to support conservation policies for zooplankton communities. Special emphasis is given to habitat conservation and the implementation of river conservation programs like “Namami Gange” initiated by the Government of India. Additionally, this review outlines a baseline draft on zooplankton monitoring in the Indian Sundarbans, addressing sampling frequency, sampling locations, and possible funding opportunities for the smooth running of this program.

浮游动物在食物网中发挥着至关重要的作用，它们将能量从初级生产者传递到更高的营养级。印度孙德尔本斯是一个大型红树林-河口生态系统，蕴藏着丰富的水生生物多样性，但也承受着来自人类活动的若干威胁。本综述全面总结了印度孙德尔本斯浮游动物的现状。本综述讨论了浮游动物在河流和潮汐小溪/运河中的分布、水体参数的影响、可能存在的威胁以及通过潜在的长期监测进行保护的建议。印度孙德尔本斯的浮游动物以桡足类（Calanoid copepods）为主（∼32.02 %），其次是栉水母纲（Choreotrichida）（∼17.8 %）、环足纲（Cyclopoida）（∼8.67 %）、十足目（Decapoda）（∼7.55 %）和栉水母纲（Harpacticoida）（∼5.66 %）。根据以往的研究，河流中的桡足类主要是伪二棘尾目（Pseudodiaptomus serricaudatus），其次是副桡足类（Paracalanus parvus）、桡足类（Bestiolina similis）、桡足类（Acartia plumosa）和桡足类（Acartiella tortaniformis）。盐度是影响印度孙德尔本斯浮游动物组合和分布的主要水体参数。该地区的浮游动物面临着多种威胁，如污染、自然灾害和河流堤坝的开发，这可能会严重影响它们的生存。本综述建议开展保护和长期监测计划，包括大规模培养、数据库开发和使用先进技术来支持浮游动物群落的保护政策。特别强调了栖息地保护和河流保护计划的实施，如印度政府发起的 "Namami Gange "计划。此外，本综述还概述了印度孙德尔本斯浮游动物监测基线草案，论述了采样频率、采样地点以及为使该计划顺利进行而可能提供的资助机会。

{"title":"Zooplankton in the Indian Sundarbans: Distribution, water parameters, threats and opportunities","authors":"Shrayan Bhattacharjee , Pradipta Kumar Ghosh , Ankit Bhattacharyya , Pallab Ghosh , Ritam Kumar Meddya , Sourav Chatterjee , Richek Routh , Suraj Mondal , Banani Mandal , Arunava Mukherjee","doi":"10.1016/j.rsma.2024.103826","DOIUrl":"10.1016/j.rsma.2024.103826","url":null,"abstract":"<div><div>Zooplankton plays crucial roles in the food web by transferring energy from primary producers to higher trophic levels. The Indian Sundarbans, being a large mangrove-estuarine ecosystem, harbors rich aquatic diversity but endures several threats from anthropogenic activities. The present review comprehensively summarizes the status of zooplankton in the Indian Sundarbans. This review discusses the distribution of zooplankton across rivers and tidal creeks/canals, the influences of water parameters, possible threats, and conservation proposals through potential long-term monitoring. Calanoid copepods (∼32.02 %) are predominant in the Indian Sundarbans, followed by Choreotrichida (∼17.8 %), Cyclopoida (∼8.67 %), Decapoda (∼7.55 %), and Harpacticoida (∼5.66 %). As per previous studies, calanoid <em>Pseudodiaptomus serricaudatus</em> is predominant in rivers, followed by <em>Paracalanus parvus</em>, <em>Bestiolina similis</em>, <em>Acartia plumosa</em>, and <em>Acartiella tortaniformis</em>. Salinity is the key water parameter influencing the assemblage and distribution of zooplankton in the Indian Sundarbans. Zooplankton in this region face several threats, such as pollution, natural disasters, and the development of river dykes, which may raise serious concerns about their survival. This review recommends conservation and long-term monitoring programs, including mass culture, database development, and the use of advanced techniques to support conservation policies for zooplankton communities. Special emphasis is given to habitat conservation and the implementation of river conservation programs like “Namami Gange” initiated by the Government of India. Additionally, this review outlines a baseline draft on zooplankton monitoring in the Indian Sundarbans, addressing sampling frequency, sampling locations, and possible funding opportunities for the smooth running of this program.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An effective way to monitor the population of juvenile horseshoe crabs in the Beibu Gulf of China 监测北部湾鲎幼体数量的有效方法

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-21 DOI: 10.1016/j.rsma.2024.103831

Mujiao Xie , Yuyuan Bao , Xiaoyong Xie , Wuying Lin , Xiaohai Chen , Xinyi Zhao , Xiaobo Xiao

Population conservation of horseshoe crab is urgently required in China as their population is declining dramatically. However, conservation efforts are severely constrained by the lack of information on the population dynamics of the species. Here, a citizen science-based investigation was conducted to continuously monitor the population dynamics of juvenile Tachypleus tridentatus and Carcinoscorpius rotundicauda in the Beibu Gulf of China over five years. A low abundance of horseshoe crabs was observed at all stations. T. tridentatus was primarily observed in the eastern of Beibu Gulf, with an abundance (0.179 ind/100 m²) larger than that of C. rotundicauda (0.007 ind/100 m²). The prosomal width range of T. tridentatus was between 9.0 and 138.0 mm while that of C. rotundicauda was between 20.0 and 111.0 mm, representing their different age distribution patterns. A continuous distribution pattern from 3rd to 14th instar was observed in the T. tridentatus population, whereas a discontinuous distribution pattern from 6th to 16th instars was observed in the C. rotundicauda population. This instar distribution pattern implies that these areas are crucial nursery habitats for the two species. No horseshoe crab within the 1st to 2nd instars (for T. tridentatus) or before 6th instar (for C. rotundicauda) were observed within five years, indicating a declining age structure with few natural births. It was concluded that the declining population would exacerbate the risk of endangered horseshoe crab. There is an urgent need to strengthen the protection of horseshoe crab in the Beibu Gulf, particularly to protect their nursery habitats. The value of long-term citizen science based-monitoring was highlighted, which greatly increased public awareness of horseshoe crab protection.

由于鲎的数量正在急剧下降，中国迫切需要对其进行种群保护。然而，由于缺乏有关该物种种群动态的信息，保护工作受到严重制约。在此，我们开展了一项以公民科学为基础的调查，对中国北部湾的三疣梭子蟹（Tachypleus tridentatus）和胭脂鱼（Carcinoscorpius rotundicauda）幼体的种群动态进行了为期五年的连续监测。在所有站点都观察到了低丰度的鲎。三疣梭子蟹主要分布在北部湾东部，其丰度（0.179 ind/100 m2）大于轮纹梭子蟹（0.007 ind/100 m2）。三疣梭子蟹的前体宽范围在 9.0 至 138.0 mm 之间，而罗纹梭子蟹的前体宽范围在 20.0 至 111.0 mm 之间，代表了它们不同的年龄分布模式。三疣梭子蟹种群从第3龄到第14龄呈连续分布，而罗纹梭子蟹种群从第6龄到第16龄呈不连续分布。这种幼体分布模式意味着这些区域是这两个物种的重要育幼栖息地。在 5 年内，没有观察到第 1 至第 2 个态期的鲎（T. tridentatus）或第 6 个态期之前的鲎（C. rotundicauda），这表明鲎的年龄结构在下降，自然出生的鲎数量很少。结论是，种群数量下降将加剧濒危鲎的风险。因此，迫切需要加强对北部湾鲎的保护，尤其是保护它们的育幼栖息地。会议强调了基于公民科学的长期监测的价值，这极大地提高了公众保护鲎的意识。

{"title":"An effective way to monitor the population of juvenile horseshoe crabs in the Beibu Gulf of China","authors":"Mujiao Xie , Yuyuan Bao , Xiaoyong Xie , Wuying Lin , Xiaohai Chen , Xinyi Zhao , Xiaobo Xiao","doi":"10.1016/j.rsma.2024.103831","DOIUrl":"10.1016/j.rsma.2024.103831","url":null,"abstract":"<div><div>Population conservation of horseshoe crab is urgently required in China as their population is declining dramatically. However, conservation efforts are severely constrained by the lack of information on the population dynamics of the species. Here, a citizen science-based investigation was conducted to continuously monitor the population dynamics of juvenile <em>Tachypleus tridentatus</em> and <em>Carcinoscorpius rotundicauda</em> in the Beibu Gulf of China over five years. A low abundance of horseshoe crabs was observed at all stations. <em>T. tridentatus</em> was primarily observed in the eastern of Beibu Gulf, with an abundance (0.179 ind/100 m<sup>2</sup>) larger than that of <em>C. rotundicauda</em> (0.007 ind/100 m<sup>2</sup>). The prosomal width range of <em>T. tridentatus</em> was between 9.0 and 138.0 mm while that of <em>C. rotundicauda</em> was between 20.0 and 111.0 mm, representing their different age distribution patterns. A continuous distribution pattern from 3rd to 14th instar was observed in the <em>T. tridentatus</em> population, whereas a discontinuous distribution pattern from 6th to 16th instars was observed in the <em>C. rotundicauda</em> population. This instar distribution pattern implies that these areas are crucial nursery habitats for the two species. No horseshoe crab within the 1st to 2nd instars (for <em>T. tridentatus</em>) or before 6th instar (for <em>C. rotundicauda</em>) were observed within five years, indicating a declining age structure with few natural births. It was concluded that the declining population would exacerbate the risk of endangered horseshoe crab. There is an urgent need to strengthen the protection of horseshoe crab in the Beibu Gulf, particularly to protect their nursery habitats. The value of long-term citizen science based-monitoring was highlighted, which greatly increased public awareness of horseshoe crab protection.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fine-scale phylogeography of Tripneustes gratilla revealed a core-periphery pattern in the South China sea 三棘鲷的精细系统地理学揭示了中国南海的核心-外围模式

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-21 DOI: 10.1016/j.rsma.2024.103832

Ruoqin Sun , Na Du , Xiaoqi Zeng , Gang Ni

The Core-Periphery Hypothesis (CPH) is a theoretical framework in phylogeography used to examine the spatial distribution of genetic diversity. The tropical Indian-Western Pacific (IWP), serving as a prominent marine biodiversity hotspot, constantly exports species and evolutionary novelties to peripheral habitats. Many species display genetic patterns consistent with CPH predictions from the IWP to periphery regions. However, the presence of CPH’s genetic signals in intermediate distribution zones remains underexplored. Here, we collected four sea urchin populations of Tripneustes gratilla in the South China Sea and analysed their population structure and evolutionary patterns using 13 morphological parameters, one mitochondrial 16S rRNA gene and nine polymorphic microsatellites. The results revealed substantial genetic homogeneity among the populations, implying a single origin from a glacial refugium. Nonetheless, morphological and microsatellite data distinctly differentiate the northernmost Fengjiawan population from the others, which could be attributed to increased environmental selection pressures such as temperature. Analysis of genetic diversity variation along latitudinal gradients and the relationship between geographic and genetic distances align with CPH expectations for both 16S and microsatellites, albeit to varying degrees of significance. This study enhances our understanding of tropical marine invertebrate evolution and supports the applicability of the CPH model at a fine-scale level.

核心-外围假说（CPH）是系统地理学的一个理论框架，用于研究遗传多样性的空间分布。热带印度洋-西太平洋（IWP）是著名的海洋生物多样性热点地区，不断向周边栖息地输出物种和进化新物种。从印度洋-西太平洋到周边地区，许多物种显示出与 CPH 预测一致的遗传模式。然而，CPH 的遗传信号在中间分布区的存在仍未得到充分探索。在此，我们在中国南海采集了4个Tripneustes gratilla海胆种群，利用13个形态参数、1个线粒体16S rRNA基因和9个多态微卫星分析了它们的种群结构和进化模式。研究结果表明，这些种群在遗传上具有很强的同质性，这意味着它们起源于冰川中的一个冰川避难所。然而，形态学和微卫星数据将最北部的冯家湾种群与其他种群明显区分开来，这可能归因于温度等环境选择压力的增加。沿纬度梯度的遗传多样性变异分析以及地理和遗传距离之间的关系符合 CPH 对 16S 和微卫星的预期，尽管显著程度不同。这项研究加深了我们对热带海洋无脊椎动物进化的理解，并支持 CPH 模型在精细尺度上的适用性。

{"title":"Fine-scale phylogeography of Tripneustes gratilla revealed a core-periphery pattern in the South China sea","authors":"Ruoqin Sun , Na Du , Xiaoqi Zeng , Gang Ni","doi":"10.1016/j.rsma.2024.103832","DOIUrl":"10.1016/j.rsma.2024.103832","url":null,"abstract":"<div><div>The Core-Periphery Hypothesis (CPH) is a theoretical framework in phylogeography used to examine the spatial distribution of genetic diversity. The tropical Indian-Western Pacific (IWP), serving as a prominent marine biodiversity hotspot, constantly exports species and evolutionary novelties to peripheral habitats. Many species display genetic patterns consistent with CPH predictions from the IWP to periphery regions. However, the presence of CPH’s genetic signals in intermediate distribution zones remains underexplored. Here, we collected four sea urchin populations of <em>Tripneustes gratilla</em> in the South China Sea and analysed their population structure and evolutionary patterns using 13 morphological parameters, one mitochondrial <em>16S rRNA</em> gene and nine polymorphic microsatellites. The results revealed substantial genetic homogeneity among the populations, implying a single origin from a glacial refugium. Nonetheless, morphological and microsatellite data distinctly differentiate the northernmost Fengjiawan population from the others, which could be attributed to increased environmental selection pressures such as temperature. Analysis of genetic diversity variation along latitudinal gradients and the relationship between geographic and genetic distances align with CPH expectations for both 16S and microsatellites, albeit to varying degrees of significance. This study enhances our understanding of tropical marine invertebrate evolution and supports the applicability of the CPH model at a fine-scale level.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Untargeted metabolomics profiling of tropical marine microalgae in batch culture system with different mobile phase using Liquid Chromatography-Orbitrap High-resolution Mass Spectrometry combined with chemometrics 利用液相色谱-轨道阱高分辨质谱法结合化学计量学，对不同流动相批量培养系统中的热带海洋微藻进行非靶向代谢组学分析

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-21 DOI: 10.1016/j.rsma.2024.103834

Diah Radini Noerdjito , Anjar Windarsih , Debora Christin Purbani , Ismu Purnaningsih , Suratno

Microalgae have recently been identified as a valuable source of natural bioactive compounds, with potential applications suggested in areas such as food, animal feed, energy production (biofuels), fine chemicals, and pharmaceuticals. However, their chemical diversity remains largely unexplored and it is necessary to determine their potency for further application. This study will explore the diversity of chemical compound from six tropical marine microalgae with untargeted comparative metabolomics approach using a Liquid Chromatography-Orbitrap High Resolution Mass Spectrometry with different mobile phases. Six microalgae species were isolated from Jakarta Bay, Indonesia. Species identification was carried out using morphological and molecular identification. The isolates Chlorella vulgaris InaCC M205 (C5), Chlorella sp. 12 (C12), Tetraselmis subcordiformis InaCC M206 (T2), Tetraselmis sp. 5 (T5), Nannochloropsis oceanica InaCC 207 (N4), and Porphyridium purpureum (P) were then cultivated using f/2 media in 1 L glass photobioreactors, irradiated with daylight lamps (4000 lux) under a 12 h/12 h photoperiod at 25 ⁰C for until cultures reached the stationary phase. Biomass harvesting and measurements were carried out at the end of the culture period. The freeze-dry biomass then was analyzed using liquid chromatography-high resolution mass spectrometry. The results showed that biomass production on day 12 was not significantly different. Biomass production ranged from 0.8 to 1 g/L, with the highest production obtained from the C5 strain and the lowest from the C12 strain. Chromatography analysis revealed that untargeted metabolomics profiling of microalgae, using water-acetonitrile as mobile phase, identified potential compound markers such as N-Methyl-2-pyrrolidone, l-(+)-Cysteine, TBHQ and L-Phenylalanine, which can differentiate between species. Compound such as Cyromazine, Arachidic acid and 13(S)-HOTrE were the potential compound markers when using Water-Methanol as mobile phase. Our research indicates that the metabolomic profile of microalgae can be used to differentiate species depending on the choice of mobile phase.

最近，人们发现微藻是天然生物活性化合物的宝贵来源，其潜在应用领域包括食品、动物饲料、能源生产（生物燃料）、精细化工和制药。然而，它们的化学多样性在很大程度上仍未得到开发，因此有必要确定其进一步应用的有效性。本研究将采用液相色谱-轨道阱高分辨质谱法和不同的流动相，以非靶向比较代谢组学方法探索六种热带海洋微藻的化合物多样性。从印度尼西亚雅加达湾分离出六种微藻。物种鉴定是通过形态学和分子鉴定进行的。分离出的小球藻 InaCC M205 (C5)、小球藻 12 (C12)、Tetraselmis subcordiformis InaCC M206 (T2)、Tetraselmis sp.5 (T5)、Nannochloropsis oceanica InaCC 207 (N4) 和 Porphyridium purpureum (P)，然后在 1 L 玻璃光生物反应器中使用 f/2 培养基进行培养，在 25 0C 温度、12 小时/12 小时光周期条件下用日光灯（4000 勒克斯）照射，直到培养物达到静止期。培养期结束后，进行生物质的采集和测量。然后使用液相色谱-高分辨质谱法分析冻干生物质。结果表明，第 12 天的生物量产量没有显著差异。生物质产量从 0.8 克/升到 1 克/升不等，其中 C5 菌株的生物质产量最高，C12 菌株的生物质产量最低。色谱分析显示，以水-乙腈为流动相对微藻进行非靶向代谢组学分析，发现了一些潜在的化合物标记，如 N-甲基-2-吡咯烷酮、l-(+)-半胱氨酸、TBHQ 和 L-苯丙氨酸，它们可以区分物种。以水-甲醇为流动相时，环丙氨嗪、花生四烯酸和 13(S)-HOTrE 等化合物是潜在的化合物标记物。我们的研究表明，根据流动相的选择，微藻的代谢组图谱可用于区分物种。

{"title":"Untargeted metabolomics profiling of tropical marine microalgae in batch culture system with different mobile phase using Liquid Chromatography-Orbitrap High-resolution Mass Spectrometry combined with chemometrics","authors":"Diah Radini Noerdjito , Anjar Windarsih , Debora Christin Purbani , Ismu Purnaningsih , Suratno","doi":"10.1016/j.rsma.2024.103834","DOIUrl":"10.1016/j.rsma.2024.103834","url":null,"abstract":"<div><div>Microalgae have recently been identified as a valuable source of natural bioactive compounds, with potential applications suggested in areas such as food, animal feed, energy production (biofuels), fine chemicals, and pharmaceuticals. However, their chemical diversity remains largely unexplored and it is necessary to determine their potency for further application. This study will explore the diversity of chemical compound from six tropical marine microalgae with untargeted comparative metabolomics approach using a Liquid Chromatography-Orbitrap High Resolution Mass Spectrometry with different mobile phases. Six microalgae species were isolated from Jakarta Bay, Indonesia. Species identification was carried out using morphological and molecular identification. The isolates <em>Chlorella vulgaris</em> InaCC M205 (C5), <em>Chlorella</em> sp. 12 (C12), <em>Tetraselmis subcordiformis</em> InaCC M206 (T2), <em>Tetraselmis</em> sp. 5 (T5), <em>Nannochloropsis oceanica</em> InaCC 207 (N4), and <em>Porphyridium purpureum</em> (P) were then cultivated using f/2 media in 1 L glass photobioreactors, irradiated with daylight lamps (4000 lux) under a 12 h/12 h photoperiod at 25 <sup>0</sup>C for until cultures reached the stationary phase. Biomass harvesting and measurements were carried out at the end of the culture period. The freeze-dry biomass then was analyzed using liquid chromatography-high resolution mass spectrometry. The results showed that biomass production on day 12 was not significantly different. Biomass production ranged from 0.8 to 1 g/L, with the highest production obtained from the C5 strain and the lowest from the C12 strain. Chromatography analysis revealed that untargeted metabolomics profiling of microalgae, using water-acetonitrile as mobile phase, identified potential compound markers such as N-Methyl-2-pyrrolidone, l-(+)-Cysteine, TBHQ and L-Phenylalanine, which can differentiate between species. Compound such as Cyromazine, Arachidic acid and 13(S)-HOTrE were the potential compound markers when using Water-Methanol as mobile phase. Our research indicates that the metabolomic profile of microalgae can be used to differentiate species depending on the choice of mobile phase.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evidence for resource partitioning in weakfishes from a coastal upwelling ecosystem 沿岸上升流生态系统中弱鱼类资源分配的证据

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-20 DOI: 10.1016/j.rsma.2024.103829

Arthur B. Bauer , Nigel E. Hussey , Luciano G. Fischer

Resource partitioning plays an important role in supporting species coexistence. In a coastal upwelling ecosystem two weakfish species, Cynoscion guatucupa and C. jamaicensis co-occur and are key commercial species. The present study aimed to provide a comprehensive assessment of the feeding ecology of both species, including to; (i) quantitatively assess diet, (ii) evaluate ontogenetic and seasonal diet variations, and (iii) estimate dietary overlap in the context of competition or resource partitioning, using an integrated approach combining stomach content (SCA) and stable isotope analyses (SIA). Our results revealed that both C. guatucupa and C. jamaicensis prey mainly on pelagic fish and shrimp with ontogenetic and seasonal changes in diet detected. Weakfishes consume a large proportion of similar prey throughout the year and high isotopic niche overlap confirmed the SCA results. Despite the similar use of food resources by both species, the availability and abundance of prey promoted by seasonal upwellings and the possible spatial segregation between C. guatucupa and C. jamaicensis may promote their co-occurrence in an upwelling ecosystem. Due to their commercial value and fisheries importance in the southwestern Atlantic, these results contribute insights to support sustainable fisheries management.

资源分配在支持物种共存方面发挥着重要作用。在一个沿岸上升流生态系统中，有两种弱鱼，Cynoscion guatucupa 和 C. jamaicensis，它们是主要的商业物种。本研究旨在采用胃内容物（SCA）和稳定同位素分析（SIA）相结合的综合方法，对这两个物种的摄食生态学进行全面评估，包括：（i）定量评估食性；（ii）评估本体和季节性食性变化；以及（iii）估计竞争或资源分配背景下的食性重叠。我们的研究结果表明，C. guatucupa和C. jamaicensis主要捕食中上层鱼类和虾类，并发现它们的食性随个体发育和季节而变化。弱鱼全年都会捕食大量相似的猎物，高度的同位素生态位重叠证实了 SCA 的结果。尽管两种鱼类对食物资源的利用相似，但季节性上升流促进了猎物的可获得性和丰度，以及C. guatucupa和C. jamaicensis之间可能存在的空间隔离，可能会促进它们在上升流生态系统中的共生。由于它们在西南大西洋的商业价值和渔业重要性，这些结果有助于支持可持续渔业管理。

{"title":"Evidence for resource partitioning in weakfishes from a coastal upwelling ecosystem","authors":"Arthur B. Bauer , Nigel E. Hussey , Luciano G. Fischer","doi":"10.1016/j.rsma.2024.103829","DOIUrl":"10.1016/j.rsma.2024.103829","url":null,"abstract":"<div><div>Resource partitioning plays an important role in supporting species coexistence. In a coastal upwelling ecosystem two weakfish species, <em>Cynoscion guatucupa</em> and <em>C. jamaicensis</em> co-occur and are key commercial species. The present study aimed to provide a comprehensive assessment of the feeding ecology of both species, including to; (i) quantitatively assess diet, (ii) evaluate ontogenetic and seasonal diet variations, and (iii) estimate dietary overlap in the context of competition or resource partitioning, using an integrated approach combining stomach content (SCA) and stable isotope analyses (SIA). Our results revealed that both <em>C. guatucupa</em> and <em>C. jamaicensis</em> prey mainly on pelagic fish and shrimp with ontogenetic and seasonal changes in diet detected. Weakfishes consume a large proportion of similar prey throughout the year and high isotopic niche overlap confirmed the SCA results. Despite the similar use of food resources by both species, the availability and abundance of prey promoted by seasonal upwellings and the possible spatial segregation between <em>C. guatucupa</em> and <em>C. jamaicensis</em> may promote their co-occurrence in an upwelling ecosystem. Due to their commercial value and fisheries importance in the southwestern Atlantic, these results contribute insights to support sustainable fisheries management.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiannual oceanographic studies in the coastal area of Karadag Nature Reserve and Koktebel Bay (northern Black Sea) in 2004–2021 2004-2021 年卡拉达格自然保护区和科克特贝尔湾（黑海北部）沿海地区的多年度海洋学研究

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-20 DOI: 10.1016/j.rsma.2024.103820

Sergey V. Kapranov, Oleg A. Troshchenko, Nelya P. Kovrigina, Natalya V. Pospelova, Nataliya Yu. Rodionova

The study presents the results of the first multiannual oceanographic monitoring in the coastal area of Karadag Nature Reserve and adjacent water areas in May and September in the period from 2004 to 2021. Significant and unprecedentedly high increasing trends were detected for salinity in May. Increasing trends in nitrate concentration in Koktebel Bay were noted both for May and for September. The five-day biochemical oxygen demand (BOD₅), ammonium and phosphate concentrations demonstrated mostly negative trends for the measurements in May and positive trends in September. Significant decreasing trends in phytoplankton biomass were noted in September, which fit in the range of the larger-scale phytoplankton trends reported in the literature. The position of the extrema of nutrients in the long-term-average and trend slope maps was confined to the areas of increased hydrodynamic and anthropogenic activity. Multivariate analysis showed significant negative correlations of the quantitative phytoplankton characteristics with salinity, which were explained by the effect of the freshened and nutrient-enriched Azov plume. The absence of significant correlations with nutrients was attributed to the non-conservative and stochastic character of the nutrient inflow on the yearly scale and time lag between the nutrient supply and the phytoplankton growth. The large percentage of occurrences of low BOD₅ values at any station indicates the unpolluted status of the area under research, which is confirmed by the low trophic index values and appearance of probability distributions of the nutrient concentrations.

本研究介绍了 2004 年至 2021 年期间 5 月和 9 月对卡拉达格自然保护区沿海地区及邻近水域进行的首次多年度海洋学监测结果。在 5 月份，发现盐度出现了前所未有的大幅上升趋势。5 月和 9 月，科克泰贝勒湾的硝酸盐浓度均呈上升趋势。五天的生化需氧量 (BOD5)、氨氮和磷酸盐浓度在五月份的测量中大多呈负值趋势，而在九月份则呈正值趋势。9 月份浮游植物生物量呈显著下降趋势，与文献报道的更大规模浮游植物趋势范围相符。长期平均值和趋势斜率图中营养物质极值的位置仅限于水动力和人为活动增加的区域。多变量分析表明，浮游植物的定量特征与盐度呈显著的负相关，其原因是清新和营养丰富的亚速羽流的影响。浮游植物的数量特征与盐度之间没有明显的相关性，原因是每年流入的营养物质具有非保守性和随机性，以及营养物质供应与浮游植物生长之间存在时滞。任何站点出现低 BOD5 值的比例都很高，这表明研究区域未受污染，低营养指数值和营养浓度概率分布的出现也证实了这一点。

{"title":"Multiannual oceanographic studies in the coastal area of Karadag Nature Reserve and Koktebel Bay (northern Black Sea) in 2004–2021","authors":"Sergey V. Kapranov, Oleg A. Troshchenko, Nelya P. Kovrigina, Natalya V. Pospelova, Nataliya Yu. Rodionova","doi":"10.1016/j.rsma.2024.103820","DOIUrl":"10.1016/j.rsma.2024.103820","url":null,"abstract":"<div><div>The study presents the results of the first multiannual oceanographic monitoring in the coastal area of Karadag Nature Reserve and adjacent water areas in May and September in the period from 2004 to 2021. Significant and unprecedentedly high increasing trends were detected for salinity in May. Increasing trends in nitrate concentration in Koktebel Bay were noted both for May and for September. The five-day biochemical oxygen demand (BOD<sub>5</sub>), ammonium and phosphate concentrations demonstrated mostly negative trends for the measurements in May and positive trends in September. Significant decreasing trends in phytoplankton biomass were noted in September, which fit in the range of the larger-scale phytoplankton trends reported in the literature. The position of the extrema of nutrients in the long-term-average and trend slope maps was confined to the areas of increased hydrodynamic and anthropogenic activity. Multivariate analysis showed significant negative correlations of the quantitative phytoplankton characteristics with salinity, which were explained by the effect of the freshened and nutrient-enriched Azov plume. The absence of significant correlations with nutrients was attributed to the non-conservative and stochastic character of the nutrient inflow on the yearly scale and time lag between the nutrient supply and the phytoplankton growth. The large percentage of occurrences of low BOD<sub>5</sub> values at any station indicates the unpolluted status of the area under research, which is confirmed by the low trophic index values and appearance of probability distributions of the nutrient concentrations.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Climatic variability of wave heights in the shelf zone of the North-Eastern part of the Black Sea according field data 根据实地数据，黑海东北部陆架区波高的气候多变性

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-09-19 DOI: 10.1016/j.rsma.2024.103808

Yana Saprykina

Wave parameters and their variability under climate change are important for forecasting in many areas, such as coastal zone management. This study analyzed the variability of key climate indices from August to October over the period 1996–2020. The relationship between these changes and changes in average monthly significant wave heights was assessed based on field measurements taken at a consistent location on the northeastern Black Sea shelf during various years within this period.

The analysis revealed that negative values of NAO, AO, and EA, along with positive values (greater than 1) of EA/WR, are associated with increases in wave heights. The study identified the key periods when joint changes in these climate indices are likely to have the greatest impact on average monthly wave heights: 4 and 7 years for August, 17 and 20 years for September, and 4, 13, and 10 years for October. The discussion emphasizes that identifying the primary regional climate indices and studying their relationship with wave parameters in detail could form the foundation for zoning the Black Sea into quasi-homogeneous zones based on climate variability. This approach could also support the development of simple prognostic models for different parts of the Black Sea, taking into account the non-stationary nature of climate change.

波浪参数及其在气候变化下的变异性对沿海地区管理等许多领域的预报都很重要。本研究分析了 1996-2020 年期间 8 月至 10 月主要气候指数的变化情况。分析表明，NAO、AO 和 EA 的负值以及 EA/WR 的正值（大于 1）与波高的增加有关。研究确定了这些气候指数的联合变化可能对月平均波高产生最大影响的关键时期：8 月为 4 年和 7 年，9 月为 17 年和 20 年，10 月为 4 年、13 年和 10 年。讨论强调，确定主要的区域气候指数并详细研究其与波浪参数的关系，可以为根据气候变异性将黑海划分为准均质区奠定基础。考虑到气候变化的非稳态性质，这种方法还有助于为黑海不同地区开发简单的预报模型。

{"title":"Climatic variability of wave heights in the shelf zone of the North-Eastern part of the Black Sea according field data","authors":"Yana Saprykina","doi":"10.1016/j.rsma.2024.103808","DOIUrl":"10.1016/j.rsma.2024.103808","url":null,"abstract":"<div><p>Wave parameters and their variability under climate change are important for forecasting in many areas, such as coastal zone management. This study analyzed the variability of key climate indices from August to October over the period 1996–2020. The relationship between these changes and changes in average monthly significant wave heights was assessed based on field measurements taken at a consistent location on the northeastern Black Sea shelf during various years within this period.</p><p>The analysis revealed that negative values of NAO, AO, and EA, along with positive values (greater than 1) of EA/W<em>R</em>, are associated with increases in wave heights. The study identified the key periods when joint changes in these climate indices are likely to have the greatest impact on average monthly wave heights: 4 and 7 years for August, 17 and 20 years for September, and 4, 13, and 10 years for October. The discussion emphasizes that identifying the primary regional climate indices and studying their relationship with wave parameters in detail could form the foundation for zoning the Black Sea into quasi-homogeneous zones based on climate variability. This approach could also support the development of simple prognostic models for different parts of the Black Sea, taking into account the non-stationary nature of climate change.</p></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0