Continental Shelf Research最新文献

{"title":"Utilizing community-led citizen science in delineating population structure of an anadromous hilsa shad (Tenualosa ilisha) from Indian coastal shelf","authors":"Kritish De ,&nbsp;Arvind Kumar Dwivedi","doi":"10.1016/j.csr.2025.105595","DOIUrl":"10.1016/j.csr.2025.105595","url":null,"abstract":"<div><div>Community-led citizen science (CCS) involves engaging the public through effective training for low-cost data collection, monitoring, policy development, and the dissemination of scientific information. This research aimed to train local fishers to capture and share images of Indian shad (<em>Tenualosa ilisha</em>) using Smartphones obtained from the coastal shelf of five river mouth systems (RMS) – Narmada, Tapi, Hooghly, Mahanadi, and Godavari. These images were employed to identify <em>T. ilisha</em> specimens and analyze their population structure using geometric morphometric (GM) techniques based on body shape. The GM approach validated the fishers' ability to correctly identify the species with 100 % accuracy. Additionally, variations in the body shape of <em>T. ilisha</em> were noted between the east and west coasts and among RMS on the east coast (Hooghly, Mahanadi, and Godavari), but not among those on the west coast (Narmada and Tapi). The findings of the present study suggest that CCS is promising in effectively contributing to marine and coastal biodiversity monitoring. Nevertheless, challenges such as electricity shortages, poor internet connectivity, limited technological resources, and low voluntary participation in poverty-stricken remote areas may impact CCS programs. These challenges can be addressed through promoting socio-economic development of local communities through remuneration-based CCS and alternative livelihood options. Coordinated efforts among all stakeholders, including environmental managers and policymakers is essential for better utilization of CCS in sustainable marine policies and improving ocean governance.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"296 ","pages":"Article 105595"},"PeriodicalIF":2.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364472","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}

{"title":"Carbon fluxes in estuarine wetlands based on a material flow perspective","authors":"Bin Ji ,&nbsp;Huarui Li ,&nbsp;Haozhe Zhang ,&nbsp;Wenwen Li ,&nbsp;Qingjia Meng","doi":"10.1016/j.csr.2025.105571","DOIUrl":"10.1016/j.csr.2025.105571","url":null,"abstract":"<div><div>Estuarine wetland is important component of continental shelf and blue carbon system. The regulation and enhancement of the carbon pool in estuarine wetlands are contingent upon a clear understanding of the carbon cycle. Given that dynamic material flow is a landmark feature of estuarine wetlands, interpreting this process from a vertical and horizontal material flow perspective may offer a potential breakthrough. However, the impacts of the material exchange in estuaries on the key processes of carbon exchange in estuarine wetlands and the mechanism of carbon sink formation are not well understood. To accurately assess and predict the dynamic capacity of carbon pools in estuarine wetlands, this review summarizes the vertical carbon flux processes in estuarine wetlands, which are believed to be dominated by plant and soil material transport, as well as the horizontal carbon flux processes influenced by hydrological conditions. In addition, we discuss the impacts of carbon and nutrient fluxes from submarine groundwater discharge (SGD), which accompany estuarine wetlands, on the systematic carbon cycling. Finally, we offer a series of recommendations to bridge existing knowledge gaps and contribute to the broader scientific discourse on the carbon cycle in estuarine wetlands.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105571"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096247","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}

{"title":"Alkalinity increase in the Baltic Sea: An episode or the development of a new steady state?","authors":"Bernd Schneider","doi":"10.1016/j.csr.2025.105569","DOIUrl":"10.1016/j.csr.2025.105569","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The alkalinity (A&lt;sub&gt;T&lt;/sub&gt;) of the brackish water in the Baltic Sea is the product of an oceanic contribution and a contribution comprising inputs from rivers and internal sources. This non-oceanic fraction (A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt;) can be quantified by subtracting the salinity dependent oceanic A&lt;sub&gt;T&lt;/sub&gt; from the measured A&lt;sub&gt;T&lt;/sub&gt; and dividing the result by the freshwater fraction.&lt;/div&gt;&lt;div&gt;&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mi&gt;r&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;mi&gt;h&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;msubsup&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;∗&lt;/mo&gt;&lt;mfrac&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msup&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mfrac&gt;&lt;/mrow&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mfrac&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msup&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mfrac&gt;&lt;/mrow&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, where S&lt;sup&gt;oc&lt;/sup&gt; is the salinity and A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;oc&lt;/sup&gt; the A&lt;sub&gt;T&lt;/sub&gt; of inflowing ocean water. A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; is thus the concentration of A&lt;sub&gt;T&lt;/sub&gt; in the freshwater fraction of the Baltic Sea. The use of A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; facilitates a simplified and transparent statistical treatment of A&lt;sub&gt;T&lt;/sub&gt; data and straightforward budget calculations. Furthermore, trends in A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; directly reflect changes in A&lt;sub&gt;T&lt;/sub&gt; inputs by river water and/or internal sources.&lt;/div&gt;&lt;div&gt;The monthly surface water A&lt;sub&gt;T&lt;/sub&gt; data (Swedish National Monitoring Programme, SMHI) during 1995–2024 at a station in the transition to the North Atlantic and at two stations in the Baltic Proper did not reveal a continuous A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; trend, but were characterized by an interim A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; increase during 2004–2016/17. In the central Baltic Proper the A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; increase rate was 7.4 (μmol/kg)/yr which corresponded to 5.8 (μmol/kg)/yr for A&lt;sub&gt;T&lt;/sub&gt; at a salinity of 7.1. The limited amount of A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; data after the termination of the interim trend did not allow conclusions about the cause for the trend which could be a temporarily limited A&lt;sub&gt;T&lt;/sub&gt; input event or the increase of an existing permanent A&lt;sub&gt;T&lt;/sub&gt; source. In the latter case the interim trend of A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; represents the transition towards a new steady state at an elevated A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; level.&lt;/div&gt;&lt;div&gt;A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; data for the Gulf of Bothnia for the period 2009–2024 were characterised by a distinct minimum in the middle of the measurement period, without evidence of an overall trend. Our study shows that this A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; pattern in the gulf was due to the variations in A&lt;sub&gt;T&lt;/sub&gt;&lt;sup&gt;fresh&lt;/sup&gt; inputs resulting from water exchange with the Baltic Proper, which mainly controlled the abundance and trends of A&lt;su","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105569"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096246","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}

{"title":"Potential human consumption risks from microplastics and non-synthetic microfibers in cultured oysters from a low-human-impact lagoon","authors":"Lucy Coral Alarcón-Ortega ,&nbsp;Nancy Ramírez-Álvarez ,&nbsp;Félix Augusto Hernández-Guzmán ,&nbsp;Eduardo Antonio Lozano-Hernández","doi":"10.1016/j.csr.2025.105562","DOIUrl":"10.1016/j.csr.2025.105562","url":null,"abstract":"<div><div>Coastal lagoons are ecologically and economically important ecosystems, serving as nursery areas for marine species, providing coastal protection, and filtering pollutants. Despite their significance, these environments are increasingly exposed to various contaminants, including microplastics (MPs) and non-synthetic microfibers (NSMs), which are pervasive in ecosystems worldwide. Due to their size, they can be ingested by marine organisms and transferred to higher trophic levels, posing a risk to marine life and human health. NSMs and MPs were identified and quantified in farmed oysters (<em>Magallana gigas</em>) and in surface water, bottom water, and sediments from a rural coastal lagoon in Baja California, Mexico. Once the samples were collected, the organic matter was removed, filtered, and finally, the particles were separated according to their shape, color, and size. The chemical composition of the particles was analyzed using μ-FTIR-ATR. The most frequently identified polymers were cellulose, cotton, and polyester, common across all matrices. Polypropylene was predominant only in surface water samples. These findings highlight the diverse sources and potential behaviors of MPs and NSMs in the lagoon. Although the lagoon experiences low anthropogenic impact and limited runoff, it is not exempt from pollution. The detection of MPs and NSMs in water, sediment, and oysters reflects the vulnerability of coastal lagoons to pollutants. It suggests a need for continued monitoring better to understand potential implications for ecosystem and human health.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105562"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997308","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}

{"title":"On the interaction of mode-1 Internal Solitary Wave with higher modes to the west of northern Nicobar Islands","authors":"Jithendra Raju Nadimpalli ,&nbsp;Mihir Kumar Dash ,&nbsp;Ibrahim Hoteit","doi":"10.1016/j.csr.2025.105564","DOIUrl":"10.1016/j.csr.2025.105564","url":null,"abstract":"<div><div>The synthetic aperture radar (SAR) image acquired on 23 April 2004 at 03:33 UTC by the Envisat shows the separation of short wavelength internal waves from the westward propagating mode-1 ISW generating from a shallow ridge connecting Batti Malv and Chowra Islands (SBM) of the northern Nicobar Islands, India. To investigate the presence of tailless mode-1 ISWs, several other SAR images near the SBM are analyzed. A particular SAR image captured on 12 October 2007 at 15:53 UTC reveals two different higher-mode ISWs in the path of the mode-1 ISW. Fitting the locations of the ISW signatures onto a time-distance curve shows that one of the higher modes is generated locally, while others are generated from SBM. Using simulations of a nonhydrostatic numerical model SUNTANS, we show that the SBM generated westward propagating mode-1 ISW overtakes the locally generated mode-3 ISW and a mode-2 ISW formed over the SBM in the previous tidal cycle. It is shown that the interaction process of the first mode with higher modes results in the formation of short internal waves trailing behind higher mode waves, pertaining to the resonance between the tail of mode-1 ISW and the higher mode solitary wave. Hence, close to a spring tide, with a combination of SAR images and numerical simulations, we show the dynamical process of westward propagating mode-1 ISW from SBM with the higher modes.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105564"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049678","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}

{"title":"Analysis of the uncertainties in tidal constants obtained from short tide gauge records and their value for tidal studies","authors":"M.S. Filmer ,&nbsp;P.L. Woodworth ,&nbsp;S.D.P. Williams ,&nbsp;S.J. Claessens","doi":"10.1016/j.csr.2025.105565","DOIUrl":"10.1016/j.csr.2025.105565","url":null,"abstract":"<div><div>We conduct a study to estimate uncertainties in tidal constants from M2, S2, N2, K1, O1, Q1 and related K2, P1, 2N2 constituents from 35-day tide gauge records in the northern Australia and Papua New Guinea regions. The motivation for this study stems from the availability of ∼300 short tide gauge records (most ∼ 30 days long) in these regions, but their accuracy for tidal studies is not clear. We simulate the 35-day uncertainties by dividing a selected set of 14 long tide gauge records (19-years where available) from the GESLA3 data set into consecutive 35-day sections. Amplitudes and phase lags computed from each long record are treated as the ‘true’ values, from which we compute and analyse inference information for the short records. Comparison of empirical amplitude ratios and phase lag differences with the relationships from the Equilibrium tide show significant differences in both amplitude and phase lag in some constituents and locations. We also compare inference information derived from the FES2022b ocean tide model, which suggests that such models could be used in this way in some instances. Empirical uncertainties in the 35-day records were no more than 0.045 m with maximum errors reaching 0.093 m. The largest 35-day errors appeared in the K1 constituent, mostly in the Torres Strait and northwest Australia. Empirical inference information showed improvement on the Equilibrium assumption for S2 and K1 reference constituents and related constituents K2, 2N2 and P1, demonstrating that the latter can be accurately derived from short records with accurate inference information.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105565"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096249","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}

{"title":"Insights into effects of salinity stress on the body-size spectrum of periphytic protozoan fauna in marine ecosystems","authors":"Awais Ali ,&nbsp;Xiaoxiao Zhong ,&nbsp;Guangjian Xu ,&nbsp;Henglong Xu","doi":"10.1016/j.csr.2025.105575","DOIUrl":"10.1016/j.csr.2025.105575","url":null,"abstract":"<div><div>To evaluate the impacts of salinity stress on the community functioning of marine ecosystems, a 1-month bioassay was performed using periphytic protozoan fauna as the test organism community within a gradient of salinity 9, 19, 29 (control), 39, and 49 PSU. The samples of the test organism assemblage were collected from an intertidal zone of the Yellow Sea, northern China. In terms of both the frequency of occurrences and the probability density, the body-size spectrum of the test protozoan fauna was clearly shifted with the test scale of salinity variability. The significant changes occurred in the body-size distinctness measures, which followed a unique trend among salinity gradients. Furthermore, the body-size spectrum showed a significant departure from an expected pattern at 9 PSU. Therefore, it is suggested that the body-size spectrum of periphytic protozoan fauna may be used as a useful tool for evaluating the effects of salinity stress on community functioning in marine environments.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105575"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158152","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}

{"title":"Wave climate at Babitonga Bay using hybrid downscaling","authors":"Rodrigo Zanette ,&nbsp;Marília S. Ramos ,&nbsp;Mario Luiz Mascagni ,&nbsp;Antonio H.F. Klein ,&nbsp;Leandro Farina","doi":"10.1016/j.csr.2025.105551","DOIUrl":"10.1016/j.csr.2025.105551","url":null,"abstract":"<div><div>This study presents a comprehensive analysis of the wave climate in Babitonga Bay, Brazil, using a hybrid downscaling approach. By integrating dynamic and statistical techniques, we effectively transferred CAWCR oceanic wave reanalysis data (1979 to 2022), for a point on the continental shelf to the coastal region, focusing on the ports of São Francisco do Sul and Itapoá. The methodology included selecting representative sea states, propagating them with the SWAN wave model, and reconstructing the time series using radial basis function interpolation. Validation against observational data at three ADCP stations showed that the hybrid downscaling results more accurately captured wave parameters compared to CAWCR hindcast, particularly at shallow water stations (4–7 m depth) where the downscaled significant wave heights closely tracked measured values, highlighting the effectiveness of the downscaling approach. Furthermore, the analysis reveals a bimodal wave climate at each port, distinguishing between the persistent, operational wave conditions and less frequent but distinct swell events from a secondary direction, a critical insight for risk assessment. The study provides detailed 2D and 3D analyses of wave parameters such as significant wave height (<span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>), peak period (<span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>), and wave direction, revealing crucial insights into wave age and height dynamics in São Francisco do Sul. These findings offer valuable data for coastal management and infrastructure planning in Babitonga Bay and similar regions. The hybrid downscaling methodology presented here proves to be an efficient and reliable tool for characterizing wave climate in port regions, providing essential information for safe navigation and port operations in São Francisco do Sul and Itapoá.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105551"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903997","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}

{"title":"Association between selenium levels and the distribution of mangrove forests in the brackish water exchange zone of the Pearl river estuary","authors":"Zhenyan Zhang,&nbsp;Dan Su,&nbsp;Shuwen Xue,&nbsp;Jiaxuan Zhang,&nbsp;Jie Wang","doi":"10.1016/j.csr.2025.105573","DOIUrl":"10.1016/j.csr.2025.105573","url":null,"abstract":"<div><div>Mangroves are vital coastal wetland system widely distributed in tropical and subtropical intertidal zones around 30° latitude. In most coastal ecosystems, plant growth is generally inhibited by salinity. However, mangroves thrive in brackish coastal areas. Previous studies have shown that mangrove distribution is strongly influenced by seawater, likely due to its chemical composition and role in global biogeochemical cycles. Seasonal variations in salinity and selenium (Se) levels in coastal regions exhibit similar patterns, and low doses of supplemental Se can protect plants against reactive oxygen species (ROS)-induced oxidative damage. This study focused on the Pearl River Estuary to examine the relationship among Se content, salinity, and mangrove distribution. Clear seasonal fluctuations in Se levels were observed in the estuary. Se concentrations in the estuary were significantly higher than the average level due to runoff. Dissolved inorganic selenium (DISe) decreased with increasing distance from the estuary. Results revealed a significant positive correlation between mangrove distribution and Se content (<em>p</em> &lt; 0.05), whereas no significant relationship with salinity was found. Furthermore, Se application enhanced mangrove tolerance to salt stress-induced oxidative damage by strengthening antioxidant defense systems. These findings provide valuable insights for the conservation and management of mangrove ecosystems.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105573"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118582","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}

{"title":"Modelling water flow in presence of various obstructions: description and validation of a generic module for 2- and 3-dimensional simulations","authors":"Florian Ganthy ,&nbsp;Romaric Verney ,&nbsp;Arnaud Le Pevedic ,&nbsp;Franck Dumas","doi":"10.1016/j.csr.2025.105580","DOIUrl":"10.1016/j.csr.2025.105580","url":null,"abstract":"<div><div>In coastal areas, various types of biological and anthropogenic structures significantly influence the flow and related sediment dynamics. In this paper, we describe a new generic flow-obstruction module, designed to represent both upward or downward, rigid or flexible structures. This module provides a particularly accurate representation of flow velocities in the presence of flexible obstructions, due to a thorough description of their bending. The obstruction/flow interaction module can operate either in 3D or 2D mode. It also offers the possibility of incorporating multiple types of obstructions within a single mesh, which is invaluable when modeling realistic ecosystem dynamics. Module validation was carried out using flume experiments on seagrasses, as well as using numerical studies involving two anthropogenic structures: mussel long-lines and oyster tables. The coupled hydrodynamic/obstruction model yielded excellent results for 2D/3D velocity fields with minimal calibration efforts. This module can be integrated into any hydrodynamic coastal model and is aimed at being upscaled to a regional scale, offering the potential to explore future trajectories regarding the vulnerability of coastal systems in response to global change, or to identify restoration measures in engineered coastal systems.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"295 ","pages":"Article 105580"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266903","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}