Continental Shelf Research最新文献

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Bibliometric analysis of microplastics research: Advances and future directions (2020–2024)
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2024.105371
Zhilin Xing , Wenting Fu , Liangjie Li , Shan Wu
{"title":"Bibliometric analysis of microplastics research: Advances and future directions (2020–2024)","authors":"Zhilin Xing ,&nbsp;Wenting Fu ,&nbsp;Liangjie Li ,&nbsp;Shan Wu","doi":"10.1016/j.csr.2024.105371","DOIUrl":"10.1016/j.csr.2024.105371","url":null,"abstract":"<div><div>Microplastics are a critical environmental concern due to their pervasive distribution and hazards. This study used Citespace software for a bibliometric analysis of microplastics research from 2020 to 2024, based on Web of Science papers. It covered sources, distribution, ecotoxicity, human health impacts, and mitigation measures. Findings showed a rapid increase in the number of related publications, with research focus gradually becoming more specialized, including advances in specific areas such as pollution status, ecotoxicology, detection technologies, and pollution control methods. Research focused on high plastic consumption regions like Europe, North America, and Asia, using innovative methods like high-throughput sequencing and nanotechnology. Keywords clustering identified primary research hotspots: microplastic pollution, ecotoxicity, pollution control, and human health impacts. Despite progress, challenges such as incomplete detection methods, the need for better risk assessment models, and improved pollution control technologies remain. This study offers insights and future research directions for microplastics pollution prevention and environmental protection.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105371"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrogeochemical evaluation of Caleta de Los Loros Patagonian salt marsh in response to the geomorphological evolution of the coast during the Holocene
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2025.105403
Eleonora Carol , Rosario Acosta , Guido Borzi , María Paula Leal , Mattia Gaiolini
{"title":"Hydrogeochemical evaluation of Caleta de Los Loros Patagonian salt marsh in response to the geomorphological evolution of the coast during the Holocene","authors":"Eleonora Carol ,&nbsp;Rosario Acosta ,&nbsp;Guido Borzi ,&nbsp;María Paula Leal ,&nbsp;Mattia Gaiolini","doi":"10.1016/j.csr.2025.105403","DOIUrl":"10.1016/j.csr.2025.105403","url":null,"abstract":"<div><div>Sea level oscillations occurred during the Quaternary conditioned the marsh landscape by limiting the factors that regulate water salinity in this environment. The aim of this work was to evaluate geochemical processes that condition groundwater salinity in Caleta de Los Loros marsh considering geomorphological – climatic factors associated with the Holocene evolution of this Argentinean Patagonia coastal area. In this sense, a mapping and a geomorphological characterization was performed based on satellite images, digital elevation models and field surveys. A monitoring network including both surface and groundwater was made in order to measure <em>in situ</em> pH and electrical conductivity and to take samples to determine major ions and stable isotopes in the laboratory. The set of results obtained highlights that variations in salinity, major ions composition and isotopic signal recorded in the groundwater of Caleta de Los Loros marsh vary in the different sectors of the intertidal plains resulting from geomorphological evolution from the middle Holocene to the present day. The older intertidal deposits (2100 years B.P.) currently located in the more continental sector host high salinity environments with high marshes vegetated with <em>Salicornia</em> sp. The hydrochemical and isotopic signal indicates that in them salinity responds primarily to evaporitic salt dissolution – precipitation cycles. Meanwhile, more coastal intertidal deposits have less than 500 years and they host low marsh environments vegetated with <em>Spartina</em> sp. Hydrochemistry and isotopic composition in them reflect that tidal water flooding is the main water contribution to the system, being marsh groundwater hydrogeochemichally similar to surface water. Locally, contributions from adjacent beach ridges and hydrochemical variations associated with CO<sub>2(g)</sub> dissolution were also recognized. Understanding environmental changes that occur in marshes as a product of their geomorphological quaternary evolution allows to understand the distribution of salinity patterns that develop in them and to give an idea of the time scale on which the salinization of these environments occurs.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105403"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polycyclic aromatic hydrocarbons and their derivatives in sediments from the Okinawa Trough and South China Sea: Occurrence, sources, profiles, and implications for anthropogenic activities
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2025.105406
Jin-Yun Li , Ye-Yang Hou , Wan-Jun Liao , Ying Guo , Yong He , Liang-Ying Liu
{"title":"Polycyclic aromatic hydrocarbons and their derivatives in sediments from the Okinawa Trough and South China Sea: Occurrence, sources, profiles, and implications for anthropogenic activities","authors":"Jin-Yun Li ,&nbsp;Ye-Yang Hou ,&nbsp;Wan-Jun Liao ,&nbsp;Ying Guo ,&nbsp;Yong He ,&nbsp;Liang-Ying Liu","doi":"10.1016/j.csr.2025.105406","DOIUrl":"10.1016/j.csr.2025.105406","url":null,"abstract":"<div><div>Sediments from the Middle Okinawa Trough (MOT) and Southwest Basin were analyzed for polycyclic aromatic hydrocarbons (PAHs) and their halogenated and nitrated derivatives. No halogenated PAHs were detected, whereas 6 nitrated PAHs were observed in three samples from the MOT (0.960−6.46 ng/g). The concentrations of Σ<sub>18</sub>PAH in the sediment of the MOT (average124 ng/g) were statistically higher than those of the Southwest Basin (39.7 ng/g). The MOT sediments were dominated by 4−5-ring PAHs, whereas the Southwest Basin sediments were dominated by 3-ring PAHs. The regional differences in concentrations and composition profiles were likely due to the different patterns of regional environmental and/or anthropogenic factors, e.g., climate and energy consumption. Sedimentary PAHs in the MOT were primarily derived from petroleum and/or petroleum combustion, while those in the Southwest Basin were mainly from petroleum. The findings suggest that environmental management and pollution control strategies should consider the specific pollution source in different regions.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105406"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Macrofauna community structure and population dynamics in the Flemish bank region: Assessing long-term change in the Anthropocene
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2024.105387
Sarah Broos , Gert Van Hoey , Carl Van Colen
{"title":"Macrofauna community structure and population dynamics in the Flemish bank region: Assessing long-term change in the Anthropocene","authors":"Sarah Broos ,&nbsp;Gert Van Hoey ,&nbsp;Carl Van Colen","doi":"10.1016/j.csr.2024.105387","DOIUrl":"10.1016/j.csr.2024.105387","url":null,"abstract":"<div><div>Benthic communities in continental shelf seas are influenced by human activities, yet assessing long-term change remains impeded by the scarcity of baseline data predating the proliferation of human activities. In this study, we considered the oldest macrofauna data from Van Veen samples collected in autumn 1970–1971 in a shallow soft-sediment seabed south of the Nieuwpoort Bank in the Belgian Part of the North Sea (BPNS). Both archived data in notebooks and hitherto unprocessed samples were considered. The community structure and biodiversity of these samples were compared with samples from autumn 2016. Furthermore, we compared (bi)monthly dynamics of indicator taxa for muddy sands (<em>Abra</em> spp.) and fine-medium sands (<em>Nephtys</em> spp.) present in the area with a time series collected in 2002–2003. Our findings reveal that both habitat types became richer in macrofauna species number and diversity. The invasive species that colonized the area between sampling periods explained &lt;1 % of observed community structure changes. Overall, most taxa had higher population densities in 2016 compared to 1970–1971. Population densities varied seasonally, peaking in August 2016, and with less distinct recruitment dynamics in 1970–1971, confirming lower overall population densities in that period, especially for Abra. We discuss these results in relation to datasets discrepancies, climate variability, and sediment fining, acknowledging limitations in sampling design and processing methods. Nevertheless, this data rescue exercise proved valuable for understanding marine ecosystem changes, highlighting the potential of ‘old’ archived data and samples from the early Anthropocene.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105387"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Contrasting diversity patterns using Autonomous Reef Monitoring Structures deployed in pelagic vs. benthic environments
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2024.105358
Ernesto Villarino , Anders Lanzén , Naiara Rodriguez-Ezpeleta , Iñaki Mendibil , Angel Borja , Iñigo Muxika , Xabier Irigoien , Joxe Mikel Garmendia , Guillem Chust
{"title":"Contrasting diversity patterns using Autonomous Reef Monitoring Structures deployed in pelagic vs. benthic environments","authors":"Ernesto Villarino ,&nbsp;Anders Lanzén ,&nbsp;Naiara Rodriguez-Ezpeleta ,&nbsp;Iñaki Mendibil ,&nbsp;Angel Borja ,&nbsp;Iñigo Muxika ,&nbsp;Xabier Irigoien ,&nbsp;Joxe Mikel Garmendia ,&nbsp;Guillem Chust","doi":"10.1016/j.csr.2024.105358","DOIUrl":"10.1016/j.csr.2024.105358","url":null,"abstract":"<div><div>Recent developments of data-driven standardized sampling tools have reduced knowledge gaps on benthic biodiversity and larval dispersal patterns. Here, we present a new application to estimate benthic spatial biodiversity patterns and evaluate potential larval dispersal from nearshore coast to the pelagic environment. To do so, we combined DNA metabarcoding and imagery on Autonomous Reef Monitoring Structures (ARMS) deployed in pelagic and nearshore benthic systems across the Bay of Biscay's Basque Coast. Results reveal a remarkably lower biodiversity in pelagic relative to benthic ARMS as well as strong spatial patterns in community composition with the pelagic ARMS greatly differing to the benthic ones according to both metabarcoding (ANOSIM R = 0.82; <em>p</em> = 0.002) and image analysis (ANOSIM R = 0.87; <em>p</em> = 0.001). We also show that a large portion of the larvae inhabiting the pelagic domain (83.5%) probably originates from benthic habitats, while the benthic community shared across pelagic and benthic habitats is considerably lower (24.9%). Further, we also analyzed which benthic species successfully use the pelagic environment to disperse across the ocean from nearshore coast, and found that the unique benthic taxa inhabiting the pelagic ARMS consist of organisms with typically larger dispersal distances relative to strictly sessile taxa with direct larvae development found only in rock-attached benthic ARMS. Overall, these findings suggest that the benthic system acts as population source delivering species towards a less diverse pelagic domain. Taken together, this novel application of ARMS deployed in pelagic systems has the potential to identify the often overlooked yet critically important benthic community structure, as well as to unveil how dispersal pathways across benthic and pelagic habitats can shape biodiversity patterns of coastal ecosystems.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105358"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seafloor nutrient biogeochemistry and benthic fluxes in the Northeastern Mediterranean sea
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2024.105392
İsmail Akçay , Süleyman Tuğrul , Mustafa Yücel
{"title":"Seafloor nutrient biogeochemistry and benthic fluxes in the Northeastern Mediterranean sea","authors":"İsmail Akçay ,&nbsp;Süleyman Tuğrul ,&nbsp;Mustafa Yücel","doi":"10.1016/j.csr.2024.105392","DOIUrl":"10.1016/j.csr.2024.105392","url":null,"abstract":"<div><div>The coastal ecosystem of the Northeastern (NE) Mediterranean Sea has been affected by nutrient inputs originated from regional rivers and wastewater discharges. Sediment porewater nutrient fluxes into the deep waters are strongly associated with eutrophic and suboxic/anoxic conditions. There was only limited number of studies performed on the porewater and sediment biogeochemistry in the NE Mediterranean Sea having oxic conditions in the deep waters. In this study, therefore, sediment porewater nutrient (Si, N, P) and sediment organic matter biogeochemistry were studied. The study results indicated a series of redox reactions as well as remarkable contribution of porewater diffusive nutrient fluxes to the total nutrient budget in the NE Mediterranean Sea. Lower Si/N and higher N/P molar ratios in the total nutrient inputs are very likely to modify phytoplankton composition and abundance in the phosphorus deficient NE Mediterranean productive shelf waters leading to development of mesotrophic/eutrophic conditions in the NE Mediterranean Sea.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105392"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seasonal dynamics and environmental drivers of phytoplankton carbon biomass in the southern yellow sea
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2025.105404
Shujin Guo , Feng Wang , Qingzhen Yao , Yanqing Wang , Meiping Feng , Xiaoxia Sun
{"title":"Seasonal dynamics and environmental drivers of phytoplankton carbon biomass in the southern yellow sea","authors":"Shujin Guo ,&nbsp;Feng Wang ,&nbsp;Qingzhen Yao ,&nbsp;Yanqing Wang ,&nbsp;Meiping Feng ,&nbsp;Xiaoxia Sun","doi":"10.1016/j.csr.2025.105404","DOIUrl":"10.1016/j.csr.2025.105404","url":null,"abstract":"<div><div>Phytoplankton carbon biomass serves as a valuable indicator of phytoplankton biomass, playing a crucial role in parameterizing ecosystem models. However, studies on phytoplankton carbon biomass have been quite limited in continental seas, providing limited references for understanding their role in the biogeochemical carbon cycle. In this study, we examined phytoplankton carbon biomass in the SYS during the spring, summer, and fall of 2018, and clarified its characteristics, distribution patterns and controlling factors. Phytoplankton carbon biomass ranged from 2.33 to 84.74 μg C/L in spring, 1.19–1454.25 μg C/L in summer, and 0.01–33.20 μg C/L in fall in the SYS. Diatoms were the most dominant group, contributing 53%, 68%, and 67% to the total phytoplankton carbon in spring, summer, and fall, respectively, followed by dinoflagellates, which contributed 46%, 31%, and 30%. The carbon biomass of diatoms and dinoflagellates exhibited quite distinct correlations with environmental factors. Diatoms exhibited stronger nutrient dependency, whereas no significant correlation was observed between dinoflagellates and nutrients, reflecting the different nutritional strategies of the two groups (strict autotrophy vs. mixotrophy). Compared to cell abundance, carbon biomass revealed a significantly higher proportion of dinoflagellate biomass in the community structure, which is primarily due to the significant interspecies variations in cell volume. Dinoflagellates tend to have larger cell volumes compared to diatoms in the SYS, leading to an underestimation of dinoflagellate proportions when using cell abundance alone. This indicates that simply using cell abundance may lead to cognitive bias in recognizing phytoplankton community structure, and taking carbon biomass into account will provide a more comprehensive understanding.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105404"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Understanding heavy Metal pollution dynamics in Çandarlı Gulf, western Türkiye: Insights from spatial analysis, sediment transport modeling and ecological risk assessment
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2024.105393
Muhammet Duman , Atilla Hüsnü Eronat , Ezgi Talas , Murat Cenk Gerdanlı , Caner Tükel
{"title":"Understanding heavy Metal pollution dynamics in Çandarlı Gulf, western Türkiye: Insights from spatial analysis, sediment transport modeling and ecological risk assessment","authors":"Muhammet Duman ,&nbsp;Atilla Hüsnü Eronat ,&nbsp;Ezgi Talas ,&nbsp;Murat Cenk Gerdanlı ,&nbsp;Caner Tükel","doi":"10.1016/j.csr.2024.105393","DOIUrl":"10.1016/j.csr.2024.105393","url":null,"abstract":"<div><div>This study investigates the sources, levels, and distribution of heavy metals in the surficial sediments of the Çandarlı Gulf, examining both natural and anthropogenic influences. Using sediment transport models, pollution assessments, and principal component analysis (PCA), have been identified mean metal concentrations in sediments as Zn &gt; Cr &gt; Pb &gt; Ni &gt; Cu &gt; As. PCA revealed five key sources: natural processes, biogenic impacts, anthropogenic activities, industrial runoff, and wastewater. The sediment characteristics vary regionally, with high-energy conditions and sand dominance in the south, and finer materials in the north. High carbonate content in sandy areas links to mechanical abrasion. Trace elements like As, Cr, Cu, Pb and Zn exceed background values in southern and northeastern zones due to activities like container handling and ship dismantling. Ecological risk assessments show frequent adverse effects for Ni and As, and occasional effects for Cu and Zn. The study emphasizes the need for comprehensive pollution control strategies to protect the Çandarlı Gulf's marine ecosystem.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105393"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of low and high density microplastics in the world's largest choked coastal lagoon under contrasting meteoceanographic conditions
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2024.105396
Kristhal Doto , Pablo Silva , Rémi Bouyssou , Isabel Jálon-Rojas , Elisa Helena Fernandes
{"title":"Dynamics of low and high density microplastics in the world's largest choked coastal lagoon under contrasting meteoceanographic conditions","authors":"Kristhal Doto ,&nbsp;Pablo Silva ,&nbsp;Rémi Bouyssou ,&nbsp;Isabel Jálon-Rojas ,&nbsp;Elisa Helena Fernandes","doi":"10.1016/j.csr.2024.105396","DOIUrl":"10.1016/j.csr.2024.105396","url":null,"abstract":"<div><div>The contamination by plastic waste in aquatic environments has become a global issue, scientifically reported since 1970. The size and durability of microplastics (MPs, 1 μm &gt; 5 mm) have made these debris widely distributed in aquatic environments. Despite various ongoing initiatives, there is a need to fill gaps in understanding how MPs are transported from their release sources to their final destinations. Therefore, understanding the distribution and dynamics of MPs in coastal areas, such as lagoons and estuaries, which are considered continental sources of MPs to the oceans, is essential to help fill these gaps and propose alternatives for managing what is the environmental problem of the century. In this context, this study aimed to assess the transport patterns of MPs in Patos Lagoon, the largest choked coastal lagoon in the world, considering contrasting meteoceanographic conditions in the system dynamics, such as wind and discharge. Using the hydrodynamic model TELEMAC-3D and the model for plastics particles TrackMPD, simulations were performed using a type of MP polymer (Polypropylene - PP). The simulations of MP transport considered advection, dispersion and the contribution of biofilm in increasing particle density (representing high-density microplastics). The results indicated a gradient of MPs retention from north to south, with higher concentrations of MPs occurring in the northern part of the system. The central region of the lagoon showed a greater tendency for MP export towards the southern region than retention. Meanwhile, the estuary region of Patos Lagoon exhibited a tendency for export of low-density MPs free of biofilm and retention of higher-density MPs, subject to the action of the Plastisphere. Additionally, based on the results obtained from density occurrence maps, it was possible to suggest potential accumulation areas of MPs throughout the lagoon system, reinforcing that the system can act as a sink in specific regions.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105396"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radionuclides and heavy metals in the Kerch Strait sediments: Spatial distribution, fluxes and pollution loads
IF 2.1 3区 地球科学
Continental Shelf Research Pub Date : 2025-02-01 DOI: 10.1016/j.csr.2024.105386
Konstantin I. Gurov , Ekaterina А. Kotelyanets , Anna A. Zhuravleva , Dmitrii A. Kremenchutskii
{"title":"Radionuclides and heavy metals in the Kerch Strait sediments: Spatial distribution, fluxes and pollution loads","authors":"Konstantin I. Gurov ,&nbsp;Ekaterina А. Kotelyanets ,&nbsp;Anna A. Zhuravleva ,&nbsp;Dmitrii A. Kremenchutskii","doi":"10.1016/j.csr.2024.105386","DOIUrl":"10.1016/j.csr.2024.105386","url":null,"abstract":"<div><div>The Kerch Strait is a shipping artery connecting the Black Sea and the Sea of Azov and plays an essential role in the transportation of chemicals between the seas, fishing, socio-economic and tourism activities. The primary factors affecting the strait's ecosystem are construction in the coastal zone (e.g., Crimean Bridge), dredging and soil dumping, port enterprises' operations and shipping. It is known that high concentrations of radionuclides and heavy metals (HMs) are harmful to aquatic organisms and human health due to their persistence, bioaccumulation, acute and chronic toxicity. The study aims to reveal the peculiarities of the spatial distribution of radionuclides (<sup>137</sup>Cs, <sup>40</sup>K, <sup>210</sup>Pb<sub>ex</sub>, <sup>226</sup>Ra, <sup>232</sup>Th) and HMs concentration (Cu, Fe, Cr, Pb, Ni, V, Zn, As, Mn, Ti) in the sediments of the Kerch Strait, assess their sedimentation fluxes, radiological hazard parameters and pollution indices. For this purpose, 12 samples of the surface sediments and four cores were collected in the strait in 2020. The concentration of most radionuclides and HMs in the surface sediments directly correlated with the percentage of mud fraction (r = 0.28–0.90) and TOC (r = 0.41–0.95). The results of Hierarchical cluster analysis and Principal component analysis indicated the presence of two sources of HMs in the surface sediments: geogenic and combined (geogenic + anthropogenic). From the mid-90s to 2020 the sediment and mass accumulation rates increased by a factor of 1.9 and 1.4, respectively. The temporal variability of radionuclides and HMs fluxes into sediments was reconstructed. The sedimentation flux of <sup>137</sup>Cs during 1980–1987 was nine times higher than that in 2014–2020. The average sedimentation fluxes of Fe, Zn and Pb during 2014–2020 additionally increased by 31, 21 and 25%, respectively. The radiological hazard parameters indicated no significant health risk to humans from radionuclides and no enrichment/pollution for most HMs. The main exceptions were Cr, Pb and As, for which the geoaccumulation index reached unpolluted to moderately polluted levels while the enrichment factor reached strong, minor and moderate levels, respectively.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"285 ","pages":"Article 105386"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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