Regional Studies in Marine Science最新文献_第3页

A checklist of marine phytoplankton species of Northeast Brazil 巴西东北部海洋浮游植物物种清单

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-29 DOI: 10.1016/j.rsma.2024.103887

Claire Carré , Pedro Augusto Mendes de Castro Melo , Béatrice Bec , Leandro Ferreira Cabanez , Isis Amália Cordeiro , Gabriel Bittencourt Farias , Marina Cavalcanti Jales , Sírleis Rodrigues Lacerda , Nayana Buarque Antao Silva , Monique Simier , Maria da Glória Gonçalves Silva-Cunha , Arnaud Bertrand

The oceanic zone of Northeast Brazil in the southwestern tropical Atlantic Ocean is characterised by the presence of a variety of current systems. Thus, it has the potential to host a large diversity of phytoplankton species. In this context, we propose a comprehensive checklist of documented marine phytoplankton species in this region. To this end, we have compiled all the published material and supplemented it with original data from two comprehensive surveys, the ABRAÇOS surveys, covering the shelf, slope, and offshore areas of Northeast Brazil. Even if few articles were atrieved from our review research, a total of 719 phytoplankton taxa are reported, including 98 new records plus 45 potential new records from the ABRACOS data. Most taxa are accompanied by a comprehensive library of illustrations. The two major phytoplankton groups, dinoflagellates and diatoms, contributed similarly to the total checklist richness, which is consistent with the global phytoplankton diversity. The contribution of nano- and microphytoplankton varies between areas. The shelf displays a greater diversity of pennate and small/medium-sized diatoms. This may be attributed to the inputs from estuarine rivers as well as the resuspension of benthic diatoms. Conversely, dinoflagellates are more prevalent offshore, demonstrating their adaptability to changing nutritional conditions, by employing numerous metabolic and growth strategies to survive. This checklist, which reveals an remarkable diversity of nano- and microphytoplankton in Northeast Brazil, provides a valuable reference for scientists and managers to monitor community evolution under global change.

热带大西洋西南部巴西东北部海区的特点是存在多种洋流系统。因此，这里有可能孕育出种类繁多的浮游植物。在这种情况下，我们提出了一份该地区有记录的海洋浮游植物物种综合清单。为此，我们汇编了所有已发表的资料，并补充了两次全面调查（ABRAÇOS 调查）的原始数据，调查范围包括巴西东北部的陆架、斜坡和近海区域。尽管从我们的审查研究中检索到的文章很少，但总共报告了 719 个浮游植物分类群，其中包括 98 个新记录和 45 个来自 ABRACOS 数据的潜在新记录。大多数分类群都附有全面的插图库。两大浮游植物类群--甲藻和硅藻--对核对表总丰富度的贡献相似，这与全球浮游植物的多样性一致。纳米浮游植物和微浮游植物的贡献因区域而异。陆架上的五棘类和中小型硅藻种类较多。这可能与河口河流的输入以及底栖硅藻的再悬浮有关。相反，甲藻在近海更为普遍，这表明它们能够适应不断变化的营养条件，采用多种新陈代谢和生长策略来生存。这份清单揭示了巴西东北部纳米浮游生物和微浮游生物的显著多样性，为科学家和管理人员监测全球变化下的群落演化提供了宝贵的参考。

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引用次数: 0

Spatio-temporal evolution and adaptive cycle of marine economy resilience in Bohai Rim Region 环渤海地区海洋经济恢复力的时空演变与适应周期

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-28 DOI: 10.1016/j.rsma.2024.103893

Jinghui Wu , Bo Li , Lixiao Zhang , Yi Qu

The sustainable and healthy development of the marine economy is increasingly restricted by frequent global risk disturbances. Therefore, it is urgent to conduct research on the resilience of marine economic systems to effectively address such crises. Based on scientific connotation of marine economy resilience, we established an evaluation model encompassing four dimensions: resistance, recovery, readjustment, and update. Using the adaptive cycle model, we analyzed the spatio-temporal evolution and stages of marine economy resilience at the regional, provincial, and municipal levels within the Bohai Rim Region from a multi-dimensional perspective. Our findings were as follows: (1) The evolution of the resistance dimension of marine economy resilience in the Bohai Rim Region exhibited higher volatility, while the other dimensions demonstrated favorable development trends. (2) Compared to Tianjin-Hebei and Shandong, Liaoning was more susceptible to disturbances, with the update dimension being the dominant contributor to overall resilience at the provincial level. (3) At the municipal scale, both resistance and update capabilities displayed significant spatial correlation patterns. (4) Cangzhou, Yantai, Binzhou, Weifang, Rizhao, Qinhuangdao and Tangshan experienced both positive and reverse transformation cycle, while the other cities were in a positive cycle. Finally, we proposed targeted policy recommendations for each evolutionary stage. These findings provide theoretical insights and practical foundations for enhancing marine economy resilience in the Bohai Rim Region, promoting the high-quality development, and supporting the construction of a maritime power.

海洋经济的可持续健康发展日益受到频繁的全球风险干扰的制约。因此，开展海洋经济系统抗灾能力研究，有效应对此类危机迫在眉睫。基于海洋经济恢复力的科学内涵，我们建立了包括抵抗、恢复、再调整和更新四个维度的评价模型。利用适应性循环模型，我们从多维角度分析了环渤海地区区域、省、市三级海洋经济恢复力的时空演变和阶段性变化。我们的研究结果如下(1) 环渤海地区海洋经济韧性的阻力维度的演变表现出较高的波动性，而其他维度则表现出良好的发展态势。(2) 与天津-河北和山东相比，辽宁更容易受到干扰，更新维度是省级整体韧性的主导因素。(3) 在市级尺度上，抵抗力和更新能力都表现出显著的空间相关性。(4) 沧州、烟台、滨州、潍坊、日照、秦皇岛和唐山经历了正向和逆向的转型周期，而其他城市则处于正向周期。最后，我们针对每个演化阶段提出了有针对性的政策建议。这些研究结果为增强环渤海地区海洋经济韧性、推动高质量发展、支持海洋强国建设提供了理论启示和实践基础。

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引用次数: 0

The evaluation of C, N, P release and contribution to the aquatic environment during Sargassum litters biomass decay 评估马尾藻废弃物生物量衰减过程中碳、氮、磷的释放量和对水生环境的影响

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-28 DOI: 10.1016/j.rsma.2024.103892

Zhangbin Liu , Jianqu Chen , Jian Zhang , Kai Wang , Shouyu Zhang

Sargassum is an important economic species in China, but its decomposition can impact the water environment in aquaculture areas and adjacent seas. To investigate the effects of Sargassum litters on the water environment, a 48-day in situ experiment (ISE) and a Laboratory-Controlled Experiments (LCE) were conducted. Changes in dissolved oxygen, nitrogen, and phosphorus levels in the water, as well as variations in the carbon (C), nitrogen (N), and phosphorus (P) content, lignin, cellulose, hemicellulose, and mass of Sargassum during decomposition, were assessed. The results indicated that Sargassum decomposition occurred in two phases: rapid and slow. Sargassum decomposed more rapidly and completely under ISE compared to LCE. In ISE, the mass and C, N, and P contents of Sargassum declined, with P being released earlier than C and N. By day 8, the P content had decreased by 40.91 % in S. fusiforme and 31.97 % in S. thunbergii relative to the initial values. The lignin and hemicellulose content of S. fusiforme exhibited minimal changes before and after decomposition under both ISE and LCE (p > 0.05). In S. thunbergii, the cellulose and hemicellulose content remained relatively stable under both ISE and LCE (p > 0.05). In LCE, dissolved oxygen in the water quickly decreased, while nitrogen and phosphorus concentrations increased. The cumulative release of TN and TP per unit mass was 14.759 mg·g⁻¹ and 10.196 mg·g⁻¹ for S. fusiformis, and 12.752 mg·g⁻¹ and 5.693 mg·g⁻¹ for S. thunbergii, respectively. It was inferred that Sargassum decomposition could adversely affect N and P levels in the water environment. In recent years, Sargassum blooms have frequently occurred in the East China Sea. Therefore, it is recommended to appropriately remove dead Sargassum in high-density cultivation areas to prevent N and P pollution from seaweed decomposition.

马尾藻是中国重要的经济物种，但其分解会对水产养殖区及附近海域的水环境造成影响。为了研究马尾藻废弃物对水环境的影响，我们进行了为期 48 天的现场实验（ISE）和实验室控制实验（LCE）。评估了水中溶解氧、氮和磷含量的变化，以及马尾藻分解过程中碳（C）、氮（N）和磷（P）含量、木质素、纤维素、半纤维素和质量的变化。结果表明，马尾藻的分解分为快速和缓慢两个阶段。与 LCE 相比，马尾藻在 ISE 下分解得更快更彻底。在 ISE 条件下，马尾藻的质量、C、N 和 P 含量均有所下降，其中 P 的释放早于 C 和 N。到第 8 天，与初始值相比，S. fusiforme 的 P 含量下降了 40.91%，S. thunbergii 的 P 含量下降了 31.97%。在 ISE 和 LCE 条件下，S. fusiforme 的木质素和半纤维素含量在分解前后变化极小（p > 0.05）。S. thunbergii 的纤维素和半纤维素含量在 ISE 和 LCE 条件下都保持相对稳定（p > 0.05）。在 LCE 条件下，水中的溶解氧迅速减少，而氮和磷的浓度却增加了。单位质量 TN 和 TP 的累积释放量分别为：S. fusiformis 14.759 mg-g-1 和 10.196 mg-g-1，S. thunbergii 12.752 mg-g-1 和 5.693 mg-g-1。由此推断，马尾藻的分解会对水环境中的氮和磷含量产生不利影响。近年来，东海经常出现马尾藻水华现象。因此，建议在高密度养殖区适当清除死亡的马尾藻，以防止海藻分解造成的氮和磷污染。

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引用次数: 0

Evaluating the environmental impacts of land use change in the conservation area of Indonesian National Park using life cycle assessment 利用生命周期评估评价印度尼西亚国家公园保护区土地利用变化对环境的影响

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-28 DOI: 10.1016/j.rsma.2024.103889

Anisah Anisah , Yoyon Wahyono , Novy Ariyanto , Nugroho Adi Sasongko , Isnaeni Kumalasari , Virny Zasyana Eka Putri , Martin Anda , Mutia Citrawati Lestari , Lambas Parlaungan Panggabean , Rohmadi Ridlo , Sundari Sundari , Anissa Dewi Suryaningtyas , Endah Dwi Novianti , Muhammad Raihan Farras Hakim , M. Arief Rahman Halim , Hashfi Hawali Abdul Matin , Dita Ariyanti

The Karimunjawa National Park (KNP) conservation area is facing the challenge of evolving land use change, which can potentially cause substantial environmental impact. This study examines the potential environmental impact of emissions from land use change on three major Island using methods released by the European Commission in 2010, as well as the potential environmental impact in nine stations using OpenLCA 2.0 software with the Ecoinvent 3.8 database. Impact assessment method utilized CML-IA baseline and EPS 2015d. The results of this study indicate significant emissions of greenhouse gases (GHGs) linked to land-use changes. Karimunjawa and Kemujan Island exhibit the highest emissions, at 32,424.07 t

{CO}_{2}

. Offsetting these emissions would necessitate mangrove planting encompassing 4.01 ha. Nyamuk and Parang Islands follow with emissions of 19,269.98 t

{CO}_{2}

and 18,473.92 t

{CO}_{2}

, requiring 2.38 ha and 2.28 ha of mangrove restoration for net zero emissions, respectively. The study also reveals environmental impacts and their main contributors, namely Eutrophication is 3.98E-6 kg

{PO}_{4}

--- eq and the main kontributor is Phosphorus (P); Marine ecotoxicity is 2.14E+01 kg 1.4-DB eq and the main cause is Cobalt (Co) at Menjangan Besar Island (C1 Station). The highest environmental impact is on Kemujan Island (B1 Station) and Menjangan Besar Island (C1 Station). Then, species extinction is 1.19E-21 NEX and the primary kontributor is Biological Oxygen Demand (BOD5) at Kemujan Island (B1 Station). It is imperative to halt the conversion of mangrove land into fishponds in KNP to mitigate the effects of environmental damage.

卡里蒙查瓦国家公园（KNP）保护区正面临着土地利用不断变化的挑战，这可能会对环境造成巨大影响。本研究采用欧盟委员会 2010 年发布的方法，对三个主要岛屿的土地利用变化所产生的潜在环境影响进行了研究，并使用 OpenLCA 2.0 软件和 Ecoinvent 3.8 数据库对九个站点的潜在环境影响进行了研究。影响评估方法采用了 CML-IA 基线和 EPS 2015d。研究结果表明，温室气体（GHGs）的大量排放与土地利用变化有关。Karimunjawa 岛和 Kemujan 岛的排放量最高，达 32,424.07 吨 CO2。要抵消这些排放量，就必须种植面积达 4.01 公顷的红树林。其次是尼亚穆克岛和帕朗岛，排放量分别为 19,269.98 吨 CO2 和 18,473.92 吨 CO2，需要分别种植 2.38 公顷和 2.28 公顷红树林才能实现净零排放。研究还揭示了环境影响及其主要成因，即富营养化为 3.98E-6 kg PO4----当量，主要成因是磷（P）；海洋生态毒性为 2.14E+01 kg 1.4-DB eq，主要成因是 Menjangan Besar 岛（C1 站）的钴（Co）。对环境影响最大的是 Kemujan 岛（B1 站）和 Menjangan Besar 岛（C1 站）。物种灭绝率为 1.19E-21 NEX，主要原因是 Kemujan 岛（B1 站）的生物需氧量 (BOD5)。当务之急是停止将 KNP 的红树林土地转化为鱼塘，以减轻环境破坏的影响。

{"title":"Evaluating the environmental impacts of land use change in the conservation area of Indonesian National Park using life cycle assessment","authors":"Anisah Anisah , Yoyon Wahyono , Novy Ariyanto , Nugroho Adi Sasongko , Isnaeni Kumalasari , Virny Zasyana Eka Putri , Martin Anda , Mutia Citrawati Lestari , Lambas Parlaungan Panggabean , Rohmadi Ridlo , Sundari Sundari , Anissa Dewi Suryaningtyas , Endah Dwi Novianti , Muhammad Raihan Farras Hakim , M. Arief Rahman Halim , Hashfi Hawali Abdul Matin , Dita Ariyanti","doi":"10.1016/j.rsma.2024.103889","DOIUrl":"10.1016/j.rsma.2024.103889","url":null,"abstract":"<div><div>The Karimunjawa National Park (KNP) conservation area is facing the challenge of evolving land use change, which can potentially cause substantial environmental impact. This study examines the potential environmental impact of emissions from land use change on three major Island using methods released by the European Commission in 2010, as well as the potential environmental impact in nine stations using OpenLCA 2.0 software with the Ecoinvent 3.8 database. Impact assessment method utilized CML-IA baseline and EPS 2015d. The results of this study indicate significant emissions of greenhouse gases (GHGs) linked to land-use changes. Karimunjawa and Kemujan Island exhibit the highest emissions, at 32,424.07 t<span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>. Offsetting these emissions would necessitate mangrove planting encompassing 4.01 ha. Nyamuk and Parang Islands follow with emissions of 19,269.98 t<span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> and 18,473.92 t<span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>, requiring 2.38 ha and 2.28 ha of mangrove restoration for net zero emissions, respectively. The study also reveals environmental impacts and their main contributors, namely Eutrophication is 3.98E-6 kg <span><math><msub><mrow><mi>PO</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span>--- eq and the main kontributor is Phosphorus (P); Marine ecotoxicity is 2.14E+01 kg 1.4-DB eq and the main cause is Cobalt (Co) at Menjangan Besar Island (C1 Station). The highest environmental impact is on Kemujan Island (B1 Station) and Menjangan Besar Island (C1 Station). Then, species extinction is 1.19E-21 NEX and the primary kontributor is Biological Oxygen Demand (BOD5) at Kemujan Island (B1 Station). It is imperative to halt the conversion of mangrove land into fishponds in KNP to mitigate the effects of environmental damage.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573339","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

Influence of tidal asymmetry on local scour near the offshore platform 潮汐不对称对近海平台附近局部冲刷的影响

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-28 DOI: 10.1016/j.rsma.2024.103891

Byeong Jin Jeon , Seong Woon Jeong , Insung Jeon , Ho Kyung Ha

An in-situ mooring measurement was conducted using a profiling sound of navigation and ranging (SONAR) system to reveal the influence of tidal asymmetry on the local scour near an artificial offshore platform, Southwest Offshore Windfarm Complex, Korea. During the mooring period, the flood tide was significantly dominated by positive tidal duration asymmetry and skewness. The lengths of scour hole were 9.8 m and 5.1 m along the flood and ebb directions, respectively. Flood-dominated currents intensified the horseshoe vortex, resulting in an approximately 10% deeper scour hole on the flood face than the ebb face. The periodic occurrence of bidirectional currents generated vortices that facilitated the mixing and redistribution of seabed sediments, forming a gentle slope within the scour hole. The average slope angles ranged from 14° to 16° on the flood face and 6° to 8° on the ebb face. Despite the strong influence of local scour, variations in scour depth (D_s) consistently remained around −2.15 m, suggesting the exposure of the underlying consolidated sediment layer. During the intermediate period from spring to neap tide, the D_s on the lower slope of scour hole increased by 0.12 m, while it decreased by 0.11 m from neap to spring tide, suggesting that the net D_s gradually approached zero over the tidal cycle. These findings underscore the importance of understanding tidal impacts on the local scour morphology to enhance the stability and design of offshore wind turbine foundations.

为了揭示潮汐不对称性对韩国西南海上风电场人工海上平台附近局部冲刷的影响，利用导航与测距（SONAR）剖面声纳系统进行了现场系泊测量。在系泊期间，潮汐持续时间的正不对称和偏斜明显主导了洪潮。沿洪水和退潮方向的冲刷孔长度分别为 9.8 米和 5.1 米。洪水主导的水流加剧了马蹄涡，导致洪水面的冲刷孔比退潮面深约 10%。周期性出现的双向流产生的漩涡促进了海底沉积物的混合和重新分布，在冲刷洞内形成了一个缓坡。洪水面的平均坡角在 14° 至 16° 之间，退潮面的平均坡角在 6° 至 8° 之间。尽管局部冲刷的影响很大，但冲刷深度（Ds）的变化始终保持在-2.15 米左右，表明下层固结沉积层暴露在外。在从春潮到落潮的中间时期，冲刷洞下斜坡的 Ds 增加了 0.12 米，而从落潮到春潮则减少了 0.11 米，这表明净 Ds 在潮汐周期中逐渐趋近于零。这些发现强调了了解潮汐对当地冲刷形态的影响对提高海上风力涡轮机基础稳定性和设计的重要性。

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引用次数: 0

A trophic modelling framework: Key metrics for the ecological assessment of artificial structures 营养模型框架：人工结构生态评估的关键指标

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-28 DOI: 10.1016/j.rsma.2024.103890

Aurore Raoux , Jessica Salaün , Jean-Philippe Pezy , Baptiste Vivier , Maxime Navon , Maël Deloor , Pascal Claquin , Sylvain Pioch , Nathalie Niquil , Jean-Claude Dauvin

As the global population expands, marine coastal ecosystems face mounting pressures from human activities, that have led to habitat deterioration and dwindling fishery resources. In this context, Artificial Reefs (ARs) have emerged as one of the promising solutions. They are generally implemented to provide habitat, to create a protective, physical boundary, to support sustainable fisheries and to facilitate ecosystem rehabilitation. Evaluating their ecological performance is crucial to ensuring they meet their objectives. Initially, assessment relied on comparing ARs to natural reefs using mainly ecological metrics which focused on fish assemblage and dynamics. Despite there being more research and documentation on effectiveness today, assessing ARs remains challenging due to the number of environmental factors that can affect the ecological systems. Moreover, ecological studies mainly used metrics that investigated the reef fish populations or ecological metrics such as fish assemblages or trophic structure that are often overlooked in studies that primarily focus on commercial fishery dynamics. Therefore, new ways of assessing artificial reef performance and the set-up of comprehensive metrics which integrate this level of complexity are needed. In this study, we focused on the "Rade de Cherbourg" in the English Channel, employing a trophic modeling approach using Ecopath with Ecosim (EwE). The study emphasizes the importance of Ecological Network Analysis (ENA) metrics for evaluating changes in the systems’ properties—such as complexity, flow diversity, and recycling capacity— which result from AR implementation. Furthermore, we identified which metrics are suitable for assessing specific AR objectives. The proposed metrics serve as a command-and-control tool for AR site managers, enabling them to evaluate the performance of each AR objective effectively. With the anticipated increase in AR projects, especially those which compensate for human impact like the Cherbourg ARs, this research offers valuable insights and future perspectives to continuously improve the ecological performance of ARs.

随着全球人口的增长，海洋沿岸生态系统面临着来自人类活动的越来越大的压力，这导致了栖息地的恶化和渔业资源的减少。在这种情况下，人工鱼礁（ARs）成为一种很有前景的解决方案。人工鱼礁一般用于提供栖息地、建立保护性物理边界、支持可持续渔业和促进生态系统恢复。评估其生态性能对于确保其达到目标至关重要。起初，评估主要依赖于使用生态指标将 ARs 与天然珊瑚礁进行比较，这些指标侧重于鱼类的组合和动态。尽管目前有关有效性的研究和文献较多，但由于影响生态系统的环境因素较多，因此对 ARs 的评估仍具有挑战性。此外，生态研究主要使用调查珊瑚礁鱼类种群的指标或鱼类组合或营养结构等生态指标，而这些指标在主要关注商业渔业动态的研究中往往被忽视。因此，需要采用新的方法来评估人工鱼礁的性能，并建立能够整合这种复杂程度的综合指标。在这项研究中，我们重点关注英吉利海峡的 "瑟堡礁（Rade de Cherbourg）"，使用 Ecopath with Ecosim (EwE) 营养模型方法。该研究强调了生态网络分析（ENA）指标对于评估因实施 AR 而导致的系统属性变化（如复杂性、水流多样性和循环能力）的重要性。此外，我们还确定了哪些指标适合评估特定的 AR 目标。所提出的指标可作为 AR 现场管理人员的指挥和控制工具，使他们能够有效评估每个 AR 目标的绩效。随着可持续农业研究项目的预期增加，特别是像瑟堡可持续农业研究项目这样补偿人类影响的项目，这项研究为不断提高可持续农业研究的生态绩效提供了宝贵的见解和未来展望。

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引用次数: 0

Determination of body length regression formulas for the golden grey mullet (Chelon auratus, Risso 1810) based on otoliths found in the feces of the Caspian Seal (Pusa caspica Gmelin, 1788) 根据在里海海豹（Pusa caspica Gmelin，1788 年）粪便中发现的耳石确定金灰鲻（Chelon auratus，Risso 1810 年）的体长回归公式

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-26 DOI: 10.1016/j.rsma.2024.103888

Mirgaliy Baimukanov, Anuar Shagilbayev, Akzhan Iskakov

The Caspian Seal (Pusa caspica), the sole marine mammal endemic to the Caspian Sea, is listed in the IUCN Red List as a species facing the threat of extinction, a status similarly recognized and/or assigned in all countries in the Caspian region. The study of seal nutrition using caprological methods is of great interest for understanding animal adaptation to deteriorating habitat conditions and assessing the adequacy of their food base in the sea. This method involves analyzing the contents of feces from ichthyophages to detect undigested fish otoliths. The results of studying the seal's diet during periods of haulout on breeding grounds showed that the frequency of occurrence of Chelon auratus otoliths ranged from 2 % to 3–27.7 % of all fish otoliths detected in feces. This study aims to assess changes in Chelon auratus otoliths as they pass through seals' gastrointestinal tracts and estimate formulas for recovering the linear dimensions of fish consumed by these seals. The research indicates that otolith growth slows with fish growth but does not cease entirely. Allometry is evident in the different ratios of otolith length and width to fish length in various size groups and the change in otolith shape as fish grow. To recover the body length of fish consumed by seals based on otoliths found in their feces, applying inverse calculation formulas obtained when studying the relationship between otolith growth and fish body growth using collection material obtained directly from fish is possible. Further research should focus on refining the recovery formula for the length of large fish by dividing the length into several segments, each described by separate formulas describing the relationship between fish body length and otolith length and width growth.

里海海豹（Pusa caspica）是里海特有的唯一海洋哺乳动物，被世界自然保护联盟（IUCN）红色名录列为面临灭绝威胁的物种，里海地区的所有国家都承认和/或给予了类似的地位。利用毛细管学方法研究海豹的营养状况，对于了解动物对日益恶化的栖息地条件的适应性以及评估其在海洋中的食物基础是否充足具有重要意义。这种方法是通过分析鱼栉水母的粪便内容物来检测未消化的鱼耳石。对海豹在繁殖地栖息期间的饮食进行研究的结果表明，在粪便中检测到的所有鱼类耳石中，栉水母耳石的出现频率从 2% 到 3-27.7% 不等。本研究旨在评估海豹耳石在通过海豹胃肠道时的变化，并估算恢复海豹食用鱼类线性尺寸的公式。研究表明，耳石的生长会随着鱼的生长而减缓，但不会完全停止。不同体型组的耳石长度和宽度与鱼体长度的比例不同，耳石形状也随着鱼体的生长而发生变化，这些都表明了耳石的异构性。要根据海豹粪便中的耳石恢复海豹食用鱼的体长，可以利用直接从鱼身上获取的采集材料，应用在研究耳石增长与鱼体增长之间关系时获得的反向计算公式。进一步研究的重点应该是完善大型鱼类体长的恢复公式，将体长分为若干段，每段由描述鱼体长度与耳石长度和宽度增长之间关系的单独公式来描述。

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引用次数: 0

Long-term trends in abundance and potential drivers for eight species of coastal birds in the U.S. South Atlantic 美国南大西洋八种沿海鸟类数量的长期趋势和潜在驱动因素

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-24 DOI: 10.1016/j.rsma.2024.103886

J.K. Craig , K.I. Siegfried , R.T. Cheshire , M. Karnauskas , P.G.R. Jodice

The U.S. South Atlantic coastal region is used by many marine birds for foraging, reproduction, and migration. We developed standardized indices of relative abundance from long–term (1980–2016), semi-structured monitoring data (eBird) for eight species: Brown Pelican (Pelecanus occidentalis), Double-Crested Cormorant (Nannopterum auritum), White Ibis (Eudocimus albus), Wood Stork (Mycteria americana), Piping Plover (Charadrius melodus), American Oystercatcher (Haematopus palliatus), Clapper Rail (Rallus crepitans), and Northern Gannet (Morus bassanus). Following a period of stable or declining abundance from the 1980s through the 1990s, most species have shown stable or slightly upward trends through the late 2000s; Brown Pelican and Piping Plover have shown some evidence of recent declines. Species–specific correlations between abundance indices developed from presence/absence data and those developed from count data were positive for all species and ranged from 0.53 to 0.86. Dynamic factor analysis identified common trends in abundance among several species, in particular, Brown Pelican, Double–Crested Cormorant, and White Ibis. Model performance was improved with inclusion of an indicator of sea level rise, but not forage fish abundance or temperature, indicating habitat availability mediated by changing water levels may explain some of the underlying abundance trends. Our results provide baseline information on long–term trends for several important coastal birds that can help inform research, monitoring and conservation efforts in the U.S. South Atlantic region.

美国南大西洋沿岸地区是许多海洋鸟类觅食、繁殖和迁徙的场所。我们利用长期（1980-2016 年）、半结构化监测数据（eBird）为 8 个物种制定了标准化的相对丰度指数：这些物种包括：褐鹈鹕（Pelecanus occidentalis）、双冠鸬鹚（Nannopterum auritum）、白鹮（Eudocimus albus）、啄木鸟（Mycteria americana）、鸻（Charadrius melodus）、美洲蛎鹬（Haematopus palliatus）、爪铁（Rallus crepitans）和北大鸥（Morus bassanus）。在经历了 20 世纪 80 年代到 90 年代的丰度稳定期或下降期之后，大多数物种在 2000 年代后期呈现出稳定或略微上升的趋势；褐鹈鹕和鸻最近出现了一些下降的迹象。对所有物种而言，根据存在/缺失数据得出的丰度指数与根据计数数据得出的丰度指数之间的特定物种相关性为正，范围在 0.53 到 0.86 之间。动态因子分析发现了几个物种丰度的共同趋势，特别是褐鹈鹕、双冠鸬鹚和白鹮。加入海平面上升指标后，模型性能有所改善，但觅食鱼类丰度或温度指标却没有改善，这表明由水位变化介导的栖息地可用性可能解释了一些潜在的丰度趋势。我们的研究结果为几种重要沿海鸟类的长期趋势提供了基准信息，有助于为美国南大西洋地区的研究、监测和保护工作提供信息。

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引用次数: 0

Evolution mechanism and improvement path of marine economy resilience in Bohai Rim Region 环渤海地区海洋经济抗风险能力的演化机制与提升路径

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-21 DOI: 10.1016/j.rsma.2024.103873

Jinghui Wu , Bo Li , Lixiao Zhang , Yi Qu

The marine economy resilience is one of the key attributes to measure the sustainable development of marine economy system. In this paper, the core and controlling influencing factors are systematically screened out. The cross-scale evolution mechanism of marine economy resilience of overall and inter-provincial in the Bohai Rim Region is explored by using the spatial econometric model based on the spatial effect level. Meanwhile, the feasible improvement path is proposed for each region considering the quantification utility levels of the influencing factors in each region. The results are as follows: (1) Marine industrial structure Ind and ocean-related employment Emp significantly enhance the marine economy resilience in the Bohai Rim Region, while financial development scale Fin significantly inhibits it; (2) The positive development trend of Liaoning’s marine economy resilience is mainly due to the promoting role of financial development scale Fin, marine industrial structure Ind and marine economy scale Sca; (3) The development of marine economy resilience in Tianjin-Hebei mainly depends on marine economy scale Sca and marine infrastructure Cap; (4) Financial development scale Fin, marine industrial structure Ind, marine economy scale Sca and marine infrastructure Cap have jointly promoted the rapid development of Shandong’s marine economy resilience. Therefore, the improvement path of the overall and inter-provincial marine economy resilience in the Bohai Rim Region is determined and proposed, which effectively promote the sustainable and stable development of its marine economy.

海洋经济恢复力是衡量海洋经济系统可持续发展的关键属性之一。本文系统地筛选出核心影响因素和控制性影响因素。利用基于空间效应水平的空间计量经济模型，探讨了环渤海地区海洋经济韧性的整体和省际跨尺度演化机制。同时，考虑各区域影响因素的量化效用水平，提出了各区域可行的改善路径。结果如下(1）海洋产业结构 Ind 和海洋相关就业 Emp 显著提升了环渤海地区的海洋经济韧性，而金融发展规模 Fin 则显著抑制了环渤海地区的海洋经济韧性；（2）辽宁海洋经济韧性的积极发展态势主要得益于金融发展规模 Fin、海洋产业结构 Ind 和海洋经济规模 Sca 的促进作用；(3）津冀海洋经济韧性的发展主要取决于海洋经济规模 Sca 和海洋基础设施 Cap；（4）金融发展规模 Fin、海洋产业结构 Ind、海洋经济规模 Sca 和海洋基础设施 Cap 共同促进了山东海洋经济韧性的快速发展。因此，确定并提出了环渤海地区海洋经济整体韧性和省际海洋经济韧性的提升路径，有效促进了环渤海地区海洋经济的持续稳定发展。

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引用次数: 0

What is going on down south? A mini review of plastic pollution on marine megafauna in the Humboldt Current System 南方发生了什么？洪堡洋流系统中塑料污染对海洋巨型动物的影响综述

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2024-10-21 DOI: 10.1016/j.rsma.2024.103885

Félix Ayala , Cristel Cordero-Maldonado , Juan Tume-Ruiz , Manuel Domingo Querevalú Tume , Martín Zeta-Flores , Edgardo Quinde , Antia Rangel-Vega , Gabriel Enrique De-la-Torre , Diego Joaquín Perez-Venegas , Susana Cárdenas-Alayza

A literature review was conducted on plastic debris in megafauna of the Humboldt Current System, one of the most productive marine systems in the world that encompasses the marine-coastal zones of Peru and Chile. The information was obtained from Scopus and Google Scholar and included the analysis of macro, meso and microplastics that have been ingested or have caused entanglement in mammals, birds, turtles and fish. We found 32 publications in this regard, and plastic debris was detected in six species of mammals, 22 birds, two turtles, and two fish. Among them, five species that had interacted with plastic waste were identified as threatened by the International Union for Conservation of Nature (IUCN). Given the scarcity of research on plastic waste and megafauna in the southern hemisphere, it is essential to promote collaboration between specialized centers and to have the support of the public and private sectors to carry out adequate monitoring of the impact of plastic waste in the Humboldt Current System.

洪堡洋流系统是世界上最富饶的海洋系统之一，包括秘鲁和智利的海洋海岸带，我们对洪堡洋流系统巨型动物体内的塑料碎片进行了文献综述。相关信息来自 Scopus 和 Google Scholar，包括对哺乳动物、鸟类、海龟和鱼类摄入或造成缠绕的大型、中型和微型塑料的分析。我们发现了 32 篇这方面的论文，在 6 种哺乳动物、22 种鸟类、2 种海龟和 2 种鱼类身上发现了塑料碎片。其中，5 种与塑料废弃物有相互作用的物种被世界自然保护联盟（IUCN）认定为濒危物种。鉴于南半球有关塑料废物和巨型动物的研究很少，必须促进各专业中心之间的合作，并得到公共和私营部门的支持，以便对洪堡洋流系统中塑料废物的影响进行充分监测。

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引用次数: 0