Regional Studies in Marine Science最新文献_第4页

Structuring effects of long-term eutrophication stress on macrobenthic assemblages in Xiangshan Bay, the East China Sea

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104053

Zhou Meng , Chen Song , Weiwei Zhou , Wanhong Han , Yushu Yang , Chong Zhang , Qingxi Han

{"title":"Structuring effects of long-term eutrophication stress on macrobenthic assemblages in Xiangshan Bay, the East China Sea","authors":"Zhou Meng , Chen Song , Weiwei Zhou , Wanhong Han , Yushu Yang , Chong Zhang , Qingxi Han","doi":"10.1016/j.rsma.2025.104053","DOIUrl":"10.1016/j.rsma.2025.104053","url":null,"abstract":"<div><div>Eutrophication has been identified as a global environmental issue to marine ecology. To investigate the effects of long-term eutrophication on the composition and dominant species of macrobenthos in Xiangshan Bay, macrobenthos and aquatic environmental factors were sampled and measured in August (wet season) every year from 2012 to 2022 in Xiangshan Bay. The results showed that the average content of dissolved inorganic nitrogen (DIN) in the surface seawater of Xiangshan Bay was (0.71 ± 0.17) mg/L, and the average content of dissolved inorganic phosphorus (DIP) was (0.037 ± 0.011) mg/L. Among all five stations collected, three of them indicated severe eutrophication, while other two stations displayed moderate organic pollution in their water quality. A total of 44 macrobenthic species were identified, including 7 phyla, 9 classes, and 35 families. Annelids and Mollusca emerged as the dominant macrobenthic taxa (31.82 % and 25.00 %, respectively). The annual average abundance was 218 ind.m<sup>−2</sup>, with Annelida Polychaeta displaying the highest abundance, accounting for 46.33 % of the total. Within the macrobenthic assemblages, 9 dominant species were determined, with <em>Ophiura kinbergi</em> and <em>Sternaspis chinensis</em> consistently dominating over the five-year period. Notably, the abundance of <em>O. kinbergi</em> exhibited a strong positive correlation with DIP and water quality index (<em>A</em>) (<em>P</em> < 0.01), as well as a significant positive correlation with eutrophication index (<em>EI</em>) and temperature (T) (<em>P</em> < 0.05). The comparative analysis with historical data revealed that pollution-tolerant macrobenthos had become prevalent, featuring smaller body sizes and greater adaptability to long-term eutrophication, particularly in the innermost bay area.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104053"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179545","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

Eastern Mediterranean sea turtles in their epipelagic phase: First records of monthly growth rates and effects of a plastic pollutant

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104056

Shir Sassoon , Yair Suari , Yaniv Levy

{"title":"Eastern Mediterranean sea turtles in their epipelagic phase: First records of monthly growth rates and effects of a plastic pollutant","authors":"Shir Sassoon , Yair Suari , Yaniv Levy","doi":"10.1016/j.rsma.2025.104056","DOIUrl":"10.1016/j.rsma.2025.104056","url":null,"abstract":"<div><div>Most sea turtle conservation efforts worldwide are focused on nesting beaches. After hatchlings reach the sea, however, monitoring, research, and conservation are not prioritized, and little is known about the next life stages, when turtles are passively drifting in pelagic habitats. We study the biology of and threats to hatchling to juvenile loggerhead (<em>Caretta caretta</em>) and green (<em>Chelonia mydas</em>) sea turtle subpopulations in the Mediterranean Sea, using a dataset composed of cases of injured sea turtles that were brought for treatment to Israel's Sea Turtle Rescue Center from 1999–2020. Using length distribution of minimum curved carapace lengths, we calculated for the first time the month-specific growth rates of both turtle species. Loggerhead turtles grew at a rate of 0.76 cm month<sup>–1</sup> in the first 19 months of life and green sea turtles grew 0.92 cm month<sup>–1</sup> in the first 11 months of life. We also found that a major cause of injury for epipelagic phase turtles, ≤ 40 cm curved carapace length, was entanglement in polypropylene sacks. The proportion of epipelagic phase turtles treated in Israel's Sea Turtle Rescue Center due to these entanglements increased from 20 % of the epipelagic phase cases in 2008–75 % by the last year of this study (2020). We suspect that livestock carriers are the origin of these sacks, and preventing this type of marine pollution is crucial for populations prosperity and requires international collaboration.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104056"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180006","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

Unveiling coastal dynamics: A statistical examination of permeability, stratigraphic patterns, and coastline displacement correlations

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104017

Elaine B. de Oliveira , Eduardo G. Barboza-Pinzon

{"title":"Unveiling coastal dynamics: A statistical examination of permeability, stratigraphic patterns, and coastline displacement correlations","authors":"Elaine B. de Oliveira , Eduardo G. Barboza-Pinzon","doi":"10.1016/j.rsma.2025.104017","DOIUrl":"10.1016/j.rsma.2025.104017","url":null,"abstract":"<div><div>Understanding the factors influencing permeability is crucial for studying beach dynamics and erosion processes in coastal environments. This research investigates whether the presence of a subsurface peat/lagoon clay layer significantly impacts permeability and influences shoreline displacement in the coastal region of Rio Grande do Sul, Brazil. The methodology included categorizing the study areas based on coastline displacement, barrier evolution trends, and the presence of peat/lagoon clay. Permeability data was collected and statistically analyzed. The results show that the presence of a peat/lagoon clay layer at a higher depth does not influence the permeability coefficient, and no correlation exists between permeability and shoreline displacement. Additionally, permeability showed higher values at the berm, near the shoreface, potentially due to vehicle traffic at the backshore. These findings suggest that permeability is not the link that connects erosion on different time scales in the region. The study contributes new permeability data and emphasizes the importance of refining models for predicting beach permeability and erosion, besides highlighting the need for broader consideration of other factors in shaping coastal dynamics.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104017"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178914","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

Quantification of plastic pollution in Gulf of Mannar Marine Biosphere Reserve: Risk assessment and management strategies

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104051

A. Akash , T. Kaviarasan , K. Dhineka , M. Sambandam , P. Mishra , Muthusamy Anand

{"title":"Quantification of plastic pollution in Gulf of Mannar Marine Biosphere Reserve: Risk assessment and management strategies","authors":"A. Akash , T. Kaviarasan , K. Dhineka , M. Sambandam , P. Mishra , Muthusamy Anand","doi":"10.1016/j.rsma.2025.104051","DOIUrl":"10.1016/j.rsma.2025.104051","url":null,"abstract":"<div><div>Worldwide, plastic pollution constitutes a significant environmental issue, currently recognized as a major threat to marine biodiversity. Enhancing our knowledge of the pathway of plastic accumulation in a particular site is crucial for litter management. Hence this study aimed to examine macro, meso, and microplastics (MPs) for their abundance and characterization along the beaches of Dhanushkodi, Kundukal, Pudumadam, and Valangapuri in the Gulf of Mannar Biosphere Reserve Region, Southern India towards suggesting possible management solution. A total of 1083 numbers, 58 kg of macro litter found in 2464 m<sup>2</sup>. The average abundance of meso litter and range of MPs was 11.08 ± 16.65 items/m<sup>2</sup> and 28.2 ± 5.9–60.8 ± 23.3 particles/50 g respectively. Plastic (86 % in numbers and 71 % in weight) was found to be the most common type of macro litter. The Clean Coast Index (CCI), Plastic Abundance Index (PAI), Microplastics Pollution Index (MPPI), Pollution Load Index (PLI), Polymer Hazard Index (PHI), and Coefficient of Microplastics Impact (CMPI) revealed that the beaches ranged from moderately clean to dirty, with moderate to high plastic abundance, corresponding to Hazard Level I and a high hazard score. The backshore area accumulated a majority of the macro litter than the intertidal region. Public and fishing activities could be the main sources of plastic litter. Given that the study area is a significant biosphere reserve and a popular pilgrimage site, plastic contamination can affect biodiversity and beach tourism drastically. The study recommends stringent enforcement of a total ban on single-use plastics in this area, systematic monitoring, and appropriate training for fishermen on the proper disposal of waste, especially fishing gear would be highly effective.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104051"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143312219","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

Distribution of natural radionuclides and associated geological properties in shelf sediment of Southwest (SW) Bay of Bengal: A multivariate statistical approach

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104035

Satyanarayan Bramha , Umakanta Pradhan , R. Sarangapani , S. Chandrasekaran , M. Krishnaveni

{"title":"Distribution of natural radionuclides and associated geological properties in shelf sediment of Southwest (SW) Bay of Bengal: A multivariate statistical approach","authors":"Satyanarayan Bramha , Umakanta Pradhan , R. Sarangapani , S. Chandrasekaran , M. Krishnaveni","doi":"10.1016/j.rsma.2025.104035","DOIUrl":"10.1016/j.rsma.2025.104035","url":null,"abstract":"<div><div>Forty-three marine shelf sediment samples from the southwest (SW) Bay of Bengal were analyzed to understand the spatial distribution of natural radionuclides with their associated geological properties and evaluate these parameters through multivariate statistical techniques. The study is important to assess and evaluate the radiation level of the coastal environment. The distribution of the <sup>226</sup>Ra activity varied from BDL to 49.0 Bq kg<sup>−1</sup> with an average of 9.79 Bq kg<sup>−1</sup>, <sup>232</sup>Th activity varied from 3.93 to 148 Bq kg<sup>−1</sup> with an average value of 39.74 Bq kg<sup>−1</sup>, and <sup>40</sup>K activity varied from 149 to 879 Bq kg<sup>−1</sup> with an average value of 360.03 Bq kg<sup>−1</sup>. The results show that the average radioactive concentrations of radionuclides were less than suggested by United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) ranges. The radiological indices for coastal shelf sediments were evaluated. The average value of the Radium Equivalent (Ra<sub>eq</sub>) was 94.35 Bq kg<sup>−1</sup>, the Absorbed Dose Rate (ADR) was 43.65 nGy h<sup>−1</sup>, and the Annual Effective Dose (AEDE) was 53.53 µSv y<sup>−1</sup>. These averages were compared to international threshold limits and were below the recommended criteria. The correlation matrix, hierarchical clustering, and factor analysis using multivariate statistics were employed to investigate the relationships between natural radionuclides, radiological parameters, and geological properties. Additionally, a contour map was provided as a visual representation of the spatial distribution of radiological and geological contents within the study area.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104035"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178480","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

Effects of sediment acidification on germinability of Scrippsiella acuminata cysts in hypoxic zones

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104028

Young-Ok Kim , Mutsuo Ichinomiya , Jungmin Choi , Ju-Wook Baek , Sung-Han Kim , Jae Seong Lee

{"title":"Effects of sediment acidification on germinability of Scrippsiella acuminata cysts in hypoxic zones","authors":"Young-Ok Kim , Mutsuo Ichinomiya , Jungmin Choi , Ju-Wook Baek , Sung-Han Kim , Jae Seong Lee","doi":"10.1016/j.rsma.2025.104028","DOIUrl":"10.1016/j.rsma.2025.104028","url":null,"abstract":"<div><div>We investigated the calcareous cysts of <em>Scrippsiella acuminata</em>, with a focus on morphological changes from spiny to naked types in the surface sediments of hypoxic zones. The cyst-type abundance and bottom environmental conditions at two stations, representing hypoxic and normoxic conditions, were compared. Germination tests simulating in situ pH conditions were conducted to elucidate differences in germinability between spiny and naked cysts. The pH values at the hypoxic station reached a minimum of 7.2 in September, coinciding with high bottom-water temperatures and low dissolved oxygen levels. Significant differences in cyst abundance were observed; naked and intermediate cysts dominated the hypoxic station, whereas spiny cysts were more abundant at the normoxic station. Both cyst types exhibited a similar negative effect of germinability decrease (62–25 % for spiny cysts and 75–32 % for naked cysts) in acidic conditions (7.2) compared to normal pH conditions (7.7). Morphological changes in ungerminated cysts, such as cytoplasmic degradation and wall thickening, occurred under acidified conditions.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104028"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178524","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

Bridging the gap: Seven new distributional records from the west coast of India with phylogenetic reconstruction of the Indian deep-sea Ophidiiformes

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104016

Treasa Augustina A.X. , Miriam Paul Sreeram , Sandhya Sukumaran , Anjaly Jose , Sreekumar K.M. , Bibin Xavier , Grinson George

{"title":"Bridging the gap: Seven new distributional records from the west coast of India with phylogenetic reconstruction of the Indian deep-sea Ophidiiformes","authors":"Treasa Augustina A.X. , Miriam Paul Sreeram , Sandhya Sukumaran , Anjaly Jose , Sreekumar K.M. , Bibin Xavier , Grinson George","doi":"10.1016/j.rsma.2025.104016","DOIUrl":"10.1016/j.rsma.2025.104016","url":null,"abstract":"<div><div>The Ophidiiformes are known for vast depth range and cryptic appearances, which poses a formidable identification challenge based solely on traditional meristic and morphological characters. A comprehensive integrated taxonomic approach of 19 Ophidiiform species from the west coast of India is presented here and also documented are the first records of <em>Ophidion smithi; Pycnocraspedum squamipinne; Neobythites analis; Neobythites fasciatus; Neobythites stefanovi; Grammonus robustus</em> and <em>Saccogaster maculata</em> in the region. This study confirms the presence of <em>Dicrolene introniger</em> in Indian waters, previously regarded as doubtful. The majority of the species collected in the study belonged to the Ophidiidae family. The genetic analyses suggest a close kinship between the species <em>Neobythites stefanovi</em> and <em>Neobythites steatiticus</em> (3.4 %) while <em>Pycnocraspedum squamipinne</em> and <em>Glyptophidium oceanium</em> emerge as the most distinctly divergent pair (39.4 %). The phylogenetic reconstruction revealed that Ophidiiformes form a monophyletic arrangement. Among the five families observed in the study, Ophidiidae family exhibited a monophyly while Bythitidae and Dinematichthyidae resolved as sister taxa. This study advocates for further comprehensive research on Indian deep-sea fishes to explore deep-sea fisheries and sustainable utilization of these often-overlooked fishery resources.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104016"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178909","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

Distribution of heavy metals in surface sediments of a Coastal Lagoon (Akyatan Lagoon, Northeastern Mediterranean Sea): Ecological and potential health risk assessment

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104058

Özgür Özbay, İsmail Akçay, Mehmet Tahir Alp, Nahit Soner Börekçi

{"title":"Distribution of heavy metals in surface sediments of a Coastal Lagoon (Akyatan Lagoon, Northeastern Mediterranean Sea): Ecological and potential health risk assessment","authors":"Özgür Özbay, İsmail Akçay, Mehmet Tahir Alp, Nahit Soner Börekçi","doi":"10.1016/j.rsma.2025.104058","DOIUrl":"10.1016/j.rsma.2025.104058","url":null,"abstract":"<div><div>Coastal lagoons are highly enriched by heavy metals due to various natural and anthropogenic pressures. Sediment heavy metal pollution status and potential health risk assessment of the Akyatan Lagoon were determined from the seasonally obtained sediment samples between January 2022 and October 2022. The heavy metal concentrations in surface sediments of the Akyatan Lagoon ranged between 25.73 and 70.87 g/kg for Al, 10.28–31.03 mg/kg for Co, 0.11–1.42 mg/kg for Cd, 56.22–181.64 mg/kg for Cr, 10.06–34.16 mg/kg for Cu, 13.94–43.39 g/kg for Fe, 361.45–1118.82 mg/kg for Mn, 61.53–209.42 mg/kg for Ni, 9.46–34.43 mg/kg for Pb, and 19.57–117.42 mg/kg for Zn, respectively. The calculated ecological risk indices showed moderate Co, Cd, Cr, Ni, and Pb contamination for surface sediments of the Akyatan Lagoon. Additionally, the study results indicated that the calculated hazard index (HI) values ranged from 1.32E-04–1.87E+ 00 whilst the calculated Total Lifetime Cancer Risk (TLCR) values ranged between 1.19E-07 and 3.26E-03 for the adults and children with the higher values calculated for the children, showing a higher potential health hazards for the children. Our study also indicated significant health hazards for children and adults from the carcinogenic Cr, Cu, Mn, Ni, and Pb in the Akyatan Lagoon.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104058"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180005","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

Estimating tidal currents at the Sewol ferry tragedy site: Insights into slack water determination in the Yellow Sea

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2024.103960

Jin-Hee Yuk , Sang-Shin Byun

{"title":"Estimating tidal currents at the Sewol ferry tragedy site: Insights into slack water determination in the Yellow Sea","authors":"Jin-Hee Yuk , Sang-Shin Byun","doi":"10.1016/j.rsma.2024.103960","DOIUrl":"10.1016/j.rsma.2024.103960","url":null,"abstract":"<div><div>Errors in estimating slack water timing can lead to catastrophic consequences, as evidenced by the Sewol ferry tragedy, where initial search and rescue failures were attributed to misjudging slack water timing, resulting in substantial loss of lives. This study estimated real-time tides across the entire Yellow Sea using a finite element method (FEM) model. To verify the accuracy of the model, observed tide levels were compared with model results at five major stations in the West Sea of the Korean Peninsula, while observed tidal currents were compared with model predictions at three major stations. The model results were consistent with the observations, particularly the tide level and phase. This validated the reliability of the model in slack water determination. Moreover, an analysis of the time difference between high (low) tides and slack water revealed strong currents during high (low) tides in areas farther from the coast toward the open sea, transitioning to weaker currents near the coast during high (low) tides. Based on this result, a spatial distribution map of slack water time differences in the western seas of the Korean Peninsula was developed, along with a revised terminology dictionary to reflect the tidal environment characteristics. This study offers valuable insights for rapidly determining slack water times, crucial for search and rescue operations in the Yellow Sea, by simply determining high (low) tide times.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 103960"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178910","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

Establishing trends in trophic functioning of the Sélune River megatidal estuary prior to dam removal

IF 2.1 4区环境科学与生态学

Regional Studies in Marine Science Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104041

N. Desroy , M.C. Husset , L. Goyot , P. Le Mao , L. Soissons , J.M. Roussel , H. Le Bris

{"title":"Establishing trends in trophic functioning of the Sélune River megatidal estuary prior to dam removal","authors":"N. Desroy , M.C. Husset , L. Goyot , P. Le Mao , L. Soissons , J.M. Roussel , H. Le Bris","doi":"10.1016/j.rsma.2025.104041","DOIUrl":"10.1016/j.rsma.2025.104041","url":null,"abstract":"<div><div>Restoration of the ecological continuity of rivers has become a strong ecological issue. In some cases, it may lead to the dismantling of dams, but ecological consequences for estuarine ecosystems are poorly known. Notably, by increasing sediment and nutrient retention in reservoirs, dams can alter the influx of terrestrial subsidies to estuarine food webs. Here, we assessed the trophic functioning of the megatidal estuary of the river Sélune (bay of Mont-Saint-Michel, France) before the removal of two large dams on the river. Both estuarine benthic invertebrate and bentho-demersal fish faunas were characterized at two periods (spring and autumn 2017) and food web described by means of stable isotope (nitrogen and carbon) and fish gut analyses. Macrobenthic fauna was typical of European estuaries, with low species richness because of high physical constraints (highly variable salinity, strong currents, high altitude) prevailing in the area. High abundances and biomasses were observed in the two downstream sectors under the marine influence providing them a feeding interest for juvenile fish. Two species of gobies (<em>Pomatoschistus microps</em> and <em>Pomatoschistus minutus</em>), juvenile sea bass (<em>Dicentrarchus labrax</em>) and juvenile flounder (<em>Platichthys flesus</em>) dominated the fish fauna. Food web was mostly fueled by local primary production, predominantly microphytobenthos. Macrobenthic invertebrates (<em>Corophium arenarium</em> or <em>Bathyporeia pilosa</em>) and harpacticoid copepods and mysids in autumn were the major prey (primary consumer level) for secondary consumers. The analysis of the trophic niche of fish and their overlaps gave elements on the respective feeding strategies and inter-specific competitions. Expected long-term effects of dam removal on food web, benthic estuarine ecosystem and nursery function are clarified and discussed.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104041"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179539","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}

引用次数: 0