Regional Studies in Marine Science最新文献

{"title":"Regional environment influences the population genetic structure and diversity of the barnacle Fistulobalanus albicostatus","authors":"Ji Min Kim ,&nbsp;Seongjun Bae","doi":"10.1016/j.rsma.2024.103956","DOIUrl":"10.1016/j.rsma.2024.103956","url":null,"abstract":"<div><div>Population differentiation (population genetics) among oceanic species is influenced by both global and regional environmental factors. In this study, we aimed to determine the effects of regional environmental pressures on the genetic diversity of sessile invertebrates by assessing the genetic structure of the barnacle <em>Fistulobalanus albicostatus</em> collected from nine sites in South Korea between February and May 2023, based on nucleotide variations in the mitochondrial DNA cytochrome <em>c</em> oxidase subunit <em>I</em> (CO<em>I</em>) gene. Our analyses included assessments of extensive haplotype diversity (<em>h</em>), limited nucleotide diversity (π), neutrality tests with Tajima’s <em>D</em> and Fu’s <em>F</em>_s, mismatch distribution, population differentiation (<em>F</em>_st), non-metric multidimensional scaling (nMDS), and CO<em>I</em> haplotype networks. Based on 174 (602 bp) sequences obtained from the nine populations, 89 polymorphic sites and 106 haplotypes were identified. Most haplotypes were specific to each population, whereas certain major haplotypes were predominant in the Busan and Gunsan populations (23.1 % and 15.8 %, respectively). These findings suggest that regional environmental factors, such as restricted larval dispersal due to ocean currents and salinity fluctuations from human-made structures, affect genetic diversity. Additionally, the unimodal distribution observed in the Yeosu population likely reflects its large population size, relative to a smaller sample size. This study highlights the influence of the interaction of life-history traits of marine organisms with local environmental factors on population structure and the importance of appropriate sample sizes in population genetics studies.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103956"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new species of Heterobothrium (Monogenea: Diclidophoridae) from half-smooth golden pufferfish Lagocephalus spadiceus in the Gulf of Tonkin, Vietnam, with an identification key for the genus","authors":"Van Van Kim ,&nbsp;Hoang-Ha Thi Nguyen ,&nbsp;Vinh Thi Thanh Truong ,&nbsp;Lua Thi Dang ,&nbsp;Manh Duc Vu ,&nbsp;Nguyen Ngoc Chinh ,&nbsp;The Duc Nguyen ,&nbsp;Quan Van Nguyen ,&nbsp;Hung Manh Nguyen","doi":"10.1016/j.rsma.2024.104007","DOIUrl":"10.1016/j.rsma.2024.104007","url":null,"abstract":"<div><div><em>Heterobothrium phamvanluci</em> n. sp., a polyopisthocotylean monogenean infesting the gills of the half-smooth golden pufferfish <em>Lagocephalus spadiceus</em>, was collected off the coasts of Hai Phong and Nam Dinh provinces in the Gulf of Tonkin, Vietnam. The prevalence of infestation was 29.73 % (11/37), with an intensity range of 1–2 worms per fish. <em>Heterobothrium phamvanluci</em> n. sp. closely resembles <em>H. indicum</em>, <em>H. victorwepeneri</em>, and <em>H. tonkinense</em>, by having a male copulatory organ with 8–9 hooks. However, <em>H. phamvanluci</em> n. sp. can be distinguished from <em>H. tonkinense</em> by having fewer testes (24–40 vs. 50–100) and their position (posterior to the ovary vs. in level with it), a smaller haptor relative to body length, and a forth pair of clamps that is the smallest (vs. similar size across all pairs). Compared to <em>H. indicum</em>, it has a larger body length (4977 μm vs. 3105 μm) and a larger ratio of haptor length to body length (30 % vs. 10 %). <em>Heterobothrium phamvanluci</em> n. sp. differs from <em>H. victorwepeneri</em> by having a body length approximately three times larger (4977 μm vs. 1094 μm) and fewer testes (24–40, mean 28 vs. 40–50, mean 47). The <em>28S</em> rDNA sequences showed that <em>H. phamvanluci</em> n. sp. is closely related to <em>H. victorwepeneri</em>, <em>H. okamotoi</em>, and <em>H. tetrodonis</em>, clustering as sibling species within the genus <em>Heterobothrium</em>, except <em>H. indicum</em>. We also propose an identification key for all known species within the genus <em>Heterobothrium</em>.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 104007"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171645","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}

{"title":"Histology of testis, sperm-reproducing pattern and season, and size at first maturation of Mystus albolineatus in Vietnamese Mekong Delta","authors":"Ton Huu Duc Nguyen ,&nbsp;Quang Minh Dinh ,&nbsp;Tien Thi Kieu Nguyen ,&nbsp;Vuong Van Ly","doi":"10.1016/j.rsma.2024.104004","DOIUrl":"10.1016/j.rsma.2024.104004","url":null,"abstract":"<div><div><em>Mystus albolineatus</em> is a common catfish distributed in tropical regions; however, its biological information is still limited, especially in the Mekong Delta in Vietnam, where it is caught for food supply. This study aimed to determine testicular morphology and histology, sperm-releasing season, and length at first maturation (<em>L</em>_<em>m</em>) of <em>Mystus albolineatus</em> based on a collection of 290 individuals from Can Tho and Soc Trang provinces. The results showed that <em>Mystus albolineatus</em> exhibited elongated testes with several small lobes. Histological observations included spermatogonia, primary and secondary spermatocytes, spermatids, and spermatozoa. The fish were found to be reproductively active throughout the study period, releasing sperm mainly in the wet season as the gonadosomatic index in this time (0.66 ± 0.04 SE) was significantly higher than in the dry season (0.44 ± 0.03 SE, Mann-Whitney U, Z = -2.88, <em>p</em> &lt; 0.001). The sperm-releasing peak in Can Tho was slightly earlier (in July) than in Soc Trang (in August) due to the highest value of the gonadosomatic index in these months. The <em>L</em>_<em>m</em> was 9.02 ± 1.05 SE cm in Can Tho and 8.69 ± 0.41 SE cm in Soc Trang. Findings suggested environmental factors influencing reproductive timing and established important biological references valuable for managing this commercially exploited species.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 104004"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171646","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}

{"title":"Evaluation of metals in surface sediments from shrimp farming areas in the estuarine region of the Baixo São Francisco, in Northeastern Brazil","authors":"Larissa Santos Xavier ,&nbsp;Raynne Aparecida de Sousa Pires ,&nbsp;Marcos Vinicius Teles Gomes ,&nbsp;Elisângela Andrade Passos ,&nbsp;Joel Marques da Silva ,&nbsp;Igor Santos Silva ,&nbsp;Carlos Alexandre Borges Garcia ,&nbsp;Felipo Obed Correia ,&nbsp;Silvânio Silvério Lopes da Costa","doi":"10.1016/j.rsma.2024.103930","DOIUrl":"10.1016/j.rsma.2024.103930","url":null,"abstract":"<div><div>This study investigated surface sediments from shrimp farms in the Baixo São Francisco region of Northeastern Brazil to assess the contamination levels of eight trace metals: Fe, Mn, Cr, Zn, Pb, Cu, Ni, and Cd. The concentrations of these metals ranged from 0.41 to 3.32 µg g⁻¹ across various sampling points, with the highest levels detected in fine silt-dominated sediments. Employing the enrichment factor (EF), geoaccumulation index (I_geo), and potential ecological risk index (PERI), the samples were categorized into three groups. Group 1 samples originated from natural sources (Cd and Fe), group 2 indicated signs of human activities (Cr, Cu, Ni, Pb and Zn), and group 3 exhibited the lowest metal concentrations. The EF values indicated minimal to moderate enrichment, particularly for Cu and Zn, whereas Cd and Cr were not enriched. Ecological risk assessment revealed that all sites displayed low ecological risk, with PERI values ranging between 0.31 and 19.9. These findings highlight the potential influence of human activities on sediment quality in shrimp farming areas and emphasize the need for ongoing environmental monitoring and management practices to mitigate contamination risks.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103930"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169854","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}

{"title":"Spatio-temporal differences of marine economy resilience in China","authors":"Jinghui Wu ,&nbsp;Bo Li ,&nbsp;Lixiao Zhang","doi":"10.1016/j.rsma.2024.103983","DOIUrl":"10.1016/j.rsma.2024.103983","url":null,"abstract":"<div><div>The core variable method to quantify China’s marine economy resilience from five dimensions were applied. And gross ocean product, added value of major marine industry, ocean-related employed personnel, ocean-related consumer goods, and cargo handled at coastal seaports were selected. With the help of data processing forward positive “translation”, standard deviation, coefficient of variation, Gini coefficient and Theil coefficient were used to characterize the differences degree of each resilience dimension. Subsequently, the characteristics and causes of the differences of marine economy resilience in China and three coastal regions from 2007 to 2016 were explained in stages. Finally, the policy implications of marine economy resilience in coastal regions were proposed, respectively. The results showed that (1) The financial crisis and the New Economic Normal aggravated the differences of the resilience of gross ocean product in China, the Northern Marine Economy Circle and Eastern Marine Economy Circle. (2) The financial crisis had decreased the resilience of major marine industries in Hebei, Shandong, Shanghai, Guangxi and Hainan. (3) The difference patterns of the resilience of ocean-related employment in China were caused by regional differences. Meanwhile, Hebei, Guangxi and Hainan needed to strengthen the resilience of ocean-related employment. (4) The differences of the resilience of cargo handled at coastal seaports in China and three coastal regions from 2007 to 2014 were smaller. (5) The resilience of ocean-related consumer goods of Hebei, Liaoning, Tianjin and Shanghai for resisting impacts were slightly insufficient. The research can provide reference for promoting the sustainable development of marine economy.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103983"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169860","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}

{"title":"Zooplankton community in coastal waters of the southern patagonian shelf during early autumn: Diversity and distribution pattern linked to regional water circulation","authors":"Andrea Natalia Alvarez ,&nbsp;Juan Cruz Carbajal ,&nbsp;Carlo Javier Chazarreta ,&nbsp;Jacobo Martín ,&nbsp;Fabiana Lía Capitanio","doi":"10.1016/j.rsma.2024.103973","DOIUrl":"10.1016/j.rsma.2024.103973","url":null,"abstract":"<div><div>Zooplankton composition, abundance and distribution in the south end of the Argentine continental shelf, although documented on a large scale, is still poorly constrained at higher spatial resolution in many specific areas. This work explores the distribution and composition of zooplankton off the coast of Tierra del Fuego during early autumn, to expand the knowledge about the biological significance of this marine region, located between the Magellan Strait and the Beagle Channel. During an oceanographic survey in early autumn 2014, samples were collected with a 300 μm mesh Bongo net. A total of 20 zooplanktonic groups were recorded and 37 species identified. The Margalef index ranged between 2.24 and 4.18 among sampling stations, with high values in stations 27 and 25, which exhibited the highest diversity of copepods, chaetognaths, mysids, and amphipods. Copepods were the most abundant (730 ind/m³ in average), with <em>Drepanopus forcipatus</em> as the dominant species, followed by mysids, mainly of the species <em>Neomysis monticelli</em>, and the euphausiid species <em>Euphausia lucens</em> and <em>Thysanoessa gregaria</em>. The non-metric multidimensional scaling and hierarchical cluster analysis revealed two distinct geographic sectors, defined by species´s abundance and presence/absence. High zooplankton abundance was observed near the coast at 54°S, where sea surface temperatures were warmer, with a decrease towards deeper and colder waters. Local circulation dynamics inferred from global reanalysis data, including the southward advance of a coastal tongue of warm water during the sampling days and the formation of an anticyclonic vortex, significantly influenced zooplankton distribution in the area.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103973"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171048","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}

{"title":"Forecasting coastal stability: Digital shoreline analysis system and machine learning techniques in evaluating Impacts of cyclones","authors":"A. Ramachandran ,&nbsp;M. Sujatha ,&nbsp;Nuha Alruwais ,&nbsp;Haya Mesfer Alshahrani","doi":"10.1016/j.rsma.2024.103961","DOIUrl":"10.1016/j.rsma.2024.103961","url":null,"abstract":"<div><div>The eastern and western shores of India are affected by tropical cyclones, which lead to serious socio-environmental issues. This study analyzed shoreline changes caused by cyclone Gaja and Michaung in South eastern coastal zone of India. The goal of this study is to evaluate shoreline change rates at two significant Indian regions that are frequently hit by cyclones. Two significant cyclones, the Gaja cyclone in Tamilnadu and the Michaung cyclone in Andhra Pradesh, defined the study regions. Multi-temporal satellite imagery and an ArcGIS-based DSAS model program were employed to detect and quantify changes along the coastline, focusing on erosion and sedimentation dynamics. The study, in conjunction with shoreline accretion and erosion patterns, analyzed three decades (1993, 2003, 2013, and 2023) of Landsat images. It employed three DSAS statistical models: Net Shoreline Movement (NSM), End Point Rate (EPR), and Linear Regression Rate (LRR). The software automatically computes confidence intervals, typically at the 95 % level, for each rate of change. Accretion and erosion occur along the shoreline at different rates, according to these data. The average rate of accretion is approximately + 9 m/year along the Kodiyakarai area and + 28 m/year along Elachetladibba. The highest erosion rate is approximately −16 m/year in the Kodiyakarai coastal zone and −25 m/year in the Diviseema coastal zone.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103961"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171049","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}

{"title":"Ecology intersects with mariculture: How cultivation depth and site-specific environmental factors shape growth and nutritional profile of green mussels (Perna viridis)","authors":"Md Asaduzzaman ,&nbsp;Md Mohiuddin ,&nbsp;Md Moshiur Rahman ,&nbsp;Ilias Ebne Kabir ,&nbsp;Md Nahiduzzaman","doi":"10.1016/j.rsma.2024.103981","DOIUrl":"10.1016/j.rsma.2024.103981","url":null,"abstract":"<div><div>Understanding the interlinkages between ecological conditions and mariculture practices are vital for enhancing growth performance and nutritional profiling of marine bivalves. However, highly productive mariculture practices under different local ecological conditions have not been comprehensively documented to achieve sustainable outcomes. This study investigates how depth (0.5 m, 1 m, and 1.5 m) and site-specific ecological factors of three farming sites (Moheshkhali, Khurushkul, and Choufaldandi) influence the growth performance and nutritional profile of green mussels (<em>Perna viridis</em>) in floating raft mariculture systems in the southeast coast of the Bay of Bengal, Bangladesh. For this purpose, 20 uniform green mussel spats (2.9 ± 0.08 g) were inoculated across three cultivation depths in ten replicated mussel net socks, which were suspended vertically in the water column from horizontal floating rafts and cultured for six months (October-March) at the above-mentioned three farming sites. Among environmental factors, the two-way ANOVA model displayed both depth- and site-specific significant variation of ecological parameters (DO, salinity, turbidity, NO₃-N, PO₄-P, Chlorophyll-a) and food availability (Coscinodiscophyceae, Bacillariophyceae, Chlorophyceae, and Dinophyceae) in the studied areas. Our findings based on the two-way ANOVA model also revealed that both the depth and site-specific ecological settings significantly impact (p &lt; 0.05) growth performance, shell morphometry and nutritional profiles of green mussels. Various univariate and multivariate analyses further revealed that the above ecological factors are closely interlinked with the observed differences in growth performance and nutritional profiles of mussels. By integrating these ecological and environmental variables, our study provides actionable insights for optimizing green mussel farming practices, potentially leading to improved yield and nutritional quality in floating raft systems.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103981"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171050","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}

{"title":"The impacts of pilotage planning on green maritime logistics","authors":"Xuehao Feng ,&nbsp;Mingyang Liu ,&nbsp;Wentai Zhang ,&nbsp;Wenwei Yin ,&nbsp;Yiying Chao","doi":"10.1016/j.rsma.2024.103989","DOIUrl":"10.1016/j.rsma.2024.103989","url":null,"abstract":"<div><div>Pilotage is mandatory in international maritime logistics for the considerations of national sovereignty and navigational safety. This paper studied a green pilotage planning problem that includes deployment and route planning of pilot boats with the constraints on the time windows of the pilot pickup and delivery tasks, the number of pilots, and the capacity of pilot boats. We developed a mixed integer linear programming model that aims to maximize the overall benefit of the pilot station. In contrast to existing studies, we analyzed the optimal planning of pilot boats with the cost and environmental considerations that uncovered the impacts of green pilotage planning on carbon emissions. Three types of green policies and their impacts have been discussed in this study. We also explored how the trade-off between the operational cost and revenue from the green efforts influences the decision making of the network planner. One surprising finding has been obtained that the overall green efficiency could be improved when the network can receive extra benefit from more voyage and utilization of pilot boats. We conducted a case study of Zhoushan, China to verify the theoretical analysis. Moreover, we compared three different green subsidy policies on carbon emissions, pilotage vessel operation costs, and pilotage vessel investments. The more efficient green policy and its corresponding conditions are discussed.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103989"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171053","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}

{"title":"A comparative analysis of phytoplankton assemblages in mangrove estuaries of the Persian Gulf and the Sea of Oman","authors":"Gilan Attaran-Fariman ,&nbsp;Sima Abir ,&nbsp;Faezeh Dolatabadi ,&nbsp;Ali Naseri ,&nbsp;Ehsan Abedi ,&nbsp;Fatemeh Sayareh","doi":"10.1016/j.rsma.2024.103968","DOIUrl":"10.1016/j.rsma.2024.103968","url":null,"abstract":"<div><div>This study examined the phytoplankton communities in Iranian mangrove ecosystems along the Persian Gulf and the Sea of Oman in West Asia. Surface water samples were collected from 62 stations distributed across 10 areas within an 1830 km coastal region spanning three southern Iranian provinces: Bushehr, Hormozgan, and Sistan and Baluchestan. Sampling was conducted during November to December 2020. Analysis of these samples identified a diverse community of 169 phytoplankton species, with diatoms (68 %) and dinoflagellates (30 %) being the most abundant groups. Among diatoms, 116 species were identified, belonging to 53 genera. Dinoflagellates included 52 species from 21 genera, with 57 % of these species capable of forming cysts. <em>Rhizosolenia imbricata</em> was the most common diatom species (8 %), while <em>Tripos fusus</em> (26.78 %) and <em>Blixaea quinquecornis</em> (13.26 %) were the dominant dinoflagellates. The highest Shannon diversity index was observed for diatoms (3.283), followed by dinoflagellates (2.482). Eighteen phytoplankton species capable of causing harmful algal blooms were identified in Iranian mangrove forests. DistLM, dbRDA, and marginal tests, applied to investigate environmental factors influencing diatom taxocoenosis composition, indicated temperature as the primary driver, followed by salinity. For dinoflagellates, pH emerged as the primary factor, while temperature and dissolved oxygen played secondary roles. These findings provide valuable information about the composition and distribution of phytoplankton communities in the tropical mangrove forests of Iran, emphasizing the importance of ongoing monitoring.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"81 ","pages":"Article 103968"},"PeriodicalIF":2.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171055","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}