Regional Studies in Marine Science最新文献

{"title":"Deep water at high latitude: Gastropoda and Scaphopoda of the Central Arctic Ocean","authors":"Ivan O. Nekhaev,&nbsp;Elena M. Chaban,&nbsp;Olga L. Zimina","doi":"10.1016/j.rsma.2026.105286","DOIUrl":"10.1016/j.rsma.2026.105286","url":null,"abstract":"<div><div>The Central Arctic Ocean (CAO) is a semi-isolated, ultra-oligotrophic deep basin whose molluscan fauna has remained poorly documented compared with the Atlantic-influenced Nordic Seas. Based on new material collected during the 2022–2024 drifting expedition North Pole–41, a revision of museum holdings, and verifiable literature records, we provide the first taxonomically documented inventory of deep-water (≥900 m) Gastropoda and Scaphopoda in the CAO. We confirm fifteen gastropod and two scaphopod species. Most taxa are shared with the Nordic Seas, while only <em>Leptogyra bujnitzkii</em> (Gorbunov, 1946) is currently restricted to the CAO, and four species have not been recorded from adjacent shelves. Gastropod and scaphopod molluscs were common on the Lomonosov Ridge and the Eurasian continental slope but absent from our Amundsen Basin and Gakkel Ridge samples. Occurrences below 3000 m were rare, with the deepest record at 3922 m. Multi-way ANOVA identified depth as the dominant predictor of declining richness (F = 131, p = 3.45 × 10⁻²³), while both abundance and biomass from box-corer samples decreased significantly with depth (Spearman’s ρ = −0.582 and −0.578, respectively). The CAO fauna is strikingly species-poor and exhibits negligible endemism relative to the Nordic Seas, a pattern we attribute to low particulate organic carbon flux, strong deep-ocean isolation, and weak thermal stratification that facilitates shelf–deep interchange. We highlight likely underestimation of diversity due to sparse sampling of chemosynthetic habitats and reliance on morphospecies, and we outline priority targets for integrative taxonomy and focused sampling across the Amerasian Basin.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105286"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658849","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":"Pollution characteristics and ecological risk assessment of heavy metals and total petroleum hydrocarbons in sediments from panjin port and its adjacent dumping areas, China","authors":"Jize Liu,&nbsp;Xinyu Ren,&nbsp;Wenchao Yang,&nbsp;Shuang Song,&nbsp;Xinlong Zhou,&nbsp;Zhaowei Wang,&nbsp;Jianbo Han","doi":"10.1016/j.rsma.2026.105284","DOIUrl":"10.1016/j.rsma.2026.105284","url":null,"abstract":"<div><div>In this study, Panjin Port and two dredged sediment disposal areas (Panjin Dumping Area and Yingkou Dumping Area) are investigated to assess the spatial distribution of pollutant concentrations and changes in the chemical fractions of heavy metals and total petroleum hydrocarbons (TPHs) in sediments at different locations. The ecological risks associated with these contaminants are also assessed. Based on 39 surface sediment samples collected in June 2024, the highest concentrations of heavy metals and TPHs are found in the port area, particularly near the industrial zone and river estuary. BCR sequential extraction results indicate that heavy metals exhibit similar dominant fractions and proportional distributions across sediments from the port and two dumping areas in this single sampling campaign. The metals under investigation are predominantly found in the residual fraction, whereas Cd is primarily present in the non-residual fractions. Pb exhibits the highest proportion in the reducible fraction among the metals, which is associated with Fe-Mn oxides. The Geoaccumulation Index (I_geo) shows that Cd contamination is the most severe. The Global Contamination Factor (GCF) suggests that both Cd and Pb pose the highest environmental risks. The Toxic Risk Index (TRI) demonstrates that Cr poses the highest toxic risk. The Pollution Load Index (PLI) assessing the combined contamination from heavy metals and TPHs indicates that some sampling points in the port area and Yingkou dumping area are suffering from progressive contamination, while the Panjin dumping area is unaffected. All four indicators suggest that the overall contamination levels among the three areas are ranked as Panjin Port Area &gt; Yingkou Dumping Area &gt; Panjin Dumping Area. Pearson correlation analysis reveals that the distribution of contaminant concentrations is closely related to the sediment grain size.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105284"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638144","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":"Spatial distribution and pollution assessment of heavy metals in surface sediments along the Beihai coast, Guangxi","authors":"Na Qian,&nbsp;Chaolu,&nbsp;Bo Miao","doi":"10.1016/j.rsma.2026.105289","DOIUrl":"10.1016/j.rsma.2026.105289","url":null,"abstract":"<div><div>As a developing city, Beihai (Guangxi) faces growing environmental pressures that may threaten its coastal marine ecosystems. This study analyzes concentrations of heavy metals (Cu, Pb, Cd, Zn, Hg, As, Cr), organic carbon, and sulfides in surface sediments from 13 coastal stations. Average metal concentrations (μg/g) were: Cu (3.78), Pb (3.03), Cd (0.09), Zn (11.83), Hg (0.02), As (2.66), and Cr (6.35), with organic carbon at 0.42% and sulfides at 12.25 μg/g. All heavy metals showed a pronounced nearshore-to-offshore decline, consistent with the distributions of organic carbon and sulfides, indicating dominant influence of land-derived inputs. Spatial consistency between surface sediments and bottom water, although with notably lower concentrations in the latter, especially for Cr, Cu, Pb, and As, suggests metals are likely scavenged from the water and subsequently deposited via adsorption and particle settling. Furthermore, a clear southeast-northwest increasing trend in nearshore stations indicates the transportation of coastal current, which carries terrestrial materials northwestward along the Beihai shoreline. Correlation analysis (p &lt; 0.01) revealed strong inter-metal relationships in sediments (R² = 0.76–0.99), while only Pb in seawater exhibited significant correlations with Cr, Cu, and Zn in sediments, pointing to potential contributions from surrounding agricultural and industrial activities. According to China National standards, sediment heavy metal levels remained within safe thresholds, implying no significant pollution.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105289"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638161","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":"Shift of algal symbiont communities in the coral Acropora digitifera: Shuffling and switching during thermal stress and recovery","authors":"Li Keat Lee,&nbsp;Chui Pin Leaw,&nbsp;Haifeng Gu,&nbsp;Po Teen Lim,&nbsp;Chun Hong Tan","doi":"10.1016/j.rsma.2026.105266","DOIUrl":"10.1016/j.rsma.2026.105266","url":null,"abstract":"<div><div>The algal symbionts (Symbiodiniaceae) of reef-building corals are known for their host-specific associations, yet they can undergo restructuring through shuffling and switching under environmental disturbances, particularly thermal stress. Following the 2019 thermal stress event (degree heating weeks, DHW = 2.43 °C-weeks), <em>Acropora digitifera</em> colonies were tagged and sampled over a seven-month period to examine the dynamics of algal symbiont communities using high-throughput ITS2 rDNA amplicon sequencing. Several <em>A. digitifera</em> colonies exhibited signs of bleaching and reduced symbiont density but subsequently recovered once temperatures returned to normal. Molecular profiling revealed both symbiont shuffling and transient switching. Community restructuring included shifts among dominant <em>Cladocopium</em> ITS2 type profiles, the temporary appearance of <em>Symbiodinium</em> lineages, and the persistence of low-abundance <em>Durusdinium</em> during the recovery phase. Ordination analyses further indicated that symbiont community composition was significantly structured by sampling time, reflecting both the 2019 thermal anomaly and seasonal variability. Together, these findings indicate that <em>A. digitifera</em> can withstand moderate thermal disturbances through dynamic yet reversible restructuring of its symbiont community. By capturing these temporal shifts, this study highlights the ecological flexibility of coral–symbiont partnerships and provides baseline insights into coral resilience under increasing climate-driven thermal stress.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105266"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658844","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":"Limited carbon storage in arid mangroves of the Kachchh Region, Western India","authors":"Asha Kumari Kumawat,&nbsp;Daniel M. Alongi,&nbsp;Sandeep Kumar,&nbsp;Bhawana Pathak","doi":"10.1016/j.rsma.2026.105302","DOIUrl":"10.1016/j.rsma.2026.105302","url":null,"abstract":"<div><div>Mangrove forests are globally recognized as efficient carbon sinks; however, carbon storage in arid mangroves remains poorly quantified compared with humid tropical systems. The present study quantifies vegetation biomass, sediment organic carbon (SOC) to 30 cm sediment depth, and measured ecosystem carbon stock across eight mangrove sites in the arid Kachchh region, western India. Above and below-ground biomass of <em>Avicennia marina</em>, <em>Rhizophora mucronata</em>, and <em>Ceriops tagal</em> were estimated using allometric equations, while SOC was determined from sediment cores using bulk density and organic carbon concentration. Vegetation carbon stocks differed significantly among sites and species, with pronounced variability across the region. Mean vegetation carbon stock was 83.05 ± 16.59 Mg C ha⁻¹ , mean SOC stock to 30 cm depth was 25.56 ± 1.95 Mg C ha⁻¹ , and measured ecosystem carbon averaged 108.61 ± 18.36 Mg C ha⁻¹ . Vegetation biomass represented approximately 76% of total measured ecosystem carbon, whereas SOC contributed 24%. SOC revealed significant variation among sites and sediment depths, with island mangroves storing significantly higher SOC than coastal mangroves. Scaled to the regional mangrove area, measured ecosystem carbon storage was estimated at 7.69 × 10⁶ Mg C (approximately 28.21 million Mg CO₂e). These values are substantially lower than those of wet tropical mangroves but comparable to other arid systems, representing that mangrove carbon storage is governed by climate, hydrology, and geomorphic location rather than the presence of mangroves alone.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105302"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148738876","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 participatory multi-criteria decision framework for sustainability assessment of Calanus finmarchicus harvesting alternatives in Norwegian waters","authors":"Anastasia Henriksen,&nbsp;Paritosh Chakor Deshpande,&nbsp;Siv Marina Flø Grimstad","doi":"10.1016/j.rsma.2026.105251","DOIUrl":"10.1016/j.rsma.2026.105251","url":null,"abstract":"<div><div>With over 3.1 billion people unable to afford healthy diets and 37.7% of fish stocks overfished globally, developing sustainable marine industries based on underutilized resources have become critical for food security. Calanus finmarchicus, a dominant zooplankton species in the Northeast Atlantic, represents a significant underexploited marine resource. Despite Norway establishing a commercial fishing quota, current harvesting remains dispersed and marginal. Using qualitative and quantitative data provided by relevant stakeholders, a Multi-Criteria Decision Analysis (MCDA) is employed to rank three legally regulated harvesting areas according to their performance across selected sustainability criteria. Results show that biodiversity risk and bycatch are the most critical sustainability concerns, while fuel consumption and operational costs dominate economic assessments. Social factors, including safety and regulatory compliance, remain relevant, but less influential. Given the methodological framework adopted in this study, nearshore harvesting areas rank highest in overall sustainability performance. Findings highlight trade-offs across sustainability criteria and underscore the need for adaptive management and improved data to reduce uncertainty. The study underlines the importance of participatory decision-making and integrated assessment frameworks to guide sustainable exploitation of emerging marine resources. By making trade-offs explicit, this study offers a transparent framework for evaluating and comparing management approaches in emerging fisheries.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105251"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148740171","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":"Reevaluating carbon emission measuring techniques and associated calculations","authors":"Nalin Kamal Baijal","doi":"10.1016/j.rsma.2026.105313","DOIUrl":"10.1016/j.rsma.2026.105313","url":null,"abstract":"<div><div>This study critically examines the methodologies for measuring and calculating carbon emissions in the maritime shipping industry, with a focus on the International Maritime Organization's (IMO) Carbon Intensity Indicator (CII). The Carbon Intensity Indicator was selected for analysis because, unlike the Energy Efficiency Design Index (EEDI) and Energy Efficiency Existing Ship Index (EEXI) — which are design-phase and one-time technical assessments — the CII is the only annual operational metric that directly affects vessel ratings, triggers corrective action plans for persistently low-rated vessels, and is subject to ongoing IMO review under MEPC 83 and beyond. This makes the accuracy and fairness of CII calculations a matter of immediate commercial and regulatory importance. The research identifies key shortcomings in current practices, particularly in fuel consumption measurement and data analysis, and proposes an improved framework integrating advanced technologies such as IoT sensors and calibrated mass flow meters, together with statistical tools including Z-scores and exponential smoothing. The proposed methodology is validated using simulated data from 50 container ships and real-world operational data from 53 container vessels covering three consecutive reporting years (2023–2025). Results demonstrate that the framework produces a CII assessment that is more responsive to genuine relative changes in fleet performance, rather than to externally fixed annual reduction targets. Across the study population (53 vessels, 2023–2025), the proposed methodology showed greater year-on-year movement in attained-to-required CII ratios than the existing methodology (mean absolute change 0.118 versus 0.072), while producing substantially fewer large (two-or-more-band) rating swings (11.3% versus 21.7% of vessel-year transitions).The findings highlight the need for a fundamental reassessment of CII calculation methods to better align with the IMO's decarbonisation goals.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105313"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148740538","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":"Optical-biogeochemical decoupling of CDOM, DOC, and nutrients along the North Bali coast","authors":"I Gusti Ngurah Agung Suryaputra,&nbsp;I Wayan Mudianta,&nbsp;Kadek Lila Antara","doi":"10.1016/j.rsma.2026.105325","DOIUrl":"10.1016/j.rsma.2026.105325","url":null,"abstract":"<div><div>Tropical, tourism-impacted coastal systems are increasingly threatened by land-based nutrient and organic-matter loading, yet the widespread assumption (drawn largely from temperate, river-dominated systems) that chromophoric dissolved organic matter (CDOM) is a reliable optical proxy for both dissolved organic carbon (DOC) and inorganic nutrients has rarely been tested in such settings. We hypothesised that, in the volcanic-watershed-influenced and tourism-pressured North Bali coastal system, CDOM optical properties would track DOC but would be statistically decoupled from inorganic nutrients, reflecting distinct source and delivery mechanisms. Thirty-six surface-water samples were collected along a 74-km nearshore-to-offshore transect and characterised for in situ physicochemistry, CDOM optical indices (Napierian absorption coefficients a₂₅₄, a₃₂₅, a₃₅₅, a₄₄₀; integrated UVC, UVB, UVA and visible absorbance; SUVA₂₅₄), DOC, and dissolved inorganic nutrients (NO₃⁻, NO₂⁻, NH₃, PO₄³⁻). A multiple linear regression with AIC-based backward selection identified a four-variable optical model predicting DOC with adjusted R² = 0.49 (F₄,₃₁ = 9.36, <em>p</em> &lt; 0.0001), confirmed by a PLS regression (R² = 0.52 with three components). In contrast, no CDOM-nutrient correlation survived False Discovery Rate (FDR) correction at q &lt; 0.05, providing statistical evidence for biogeochemical decoupling. Principal component analysis recovered three significant axes (permutation <em>p</em> &lt; 0.01) explaining 62.7% of total variance: a dominant DOM-quantity axis (PC1), a physicochemical gradient (PC2), and a UVC-attenuation/oxygen axis (PC3). PERMANOVA based on distance-tertile groupings (near &lt; 17 km, mid 17–44 km, far &gt; 44 km) revealed significant spatial structure (F = 3.02, <em>p</em> = 0.001). These results demonstrate that optical proxies are robust indicators of bulk organic matter but cannot substitute for direct inorganic-nutrient monitoring in tropical, tourism-impacted coastal systems, with direct implications for coastal water-quality management.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105325"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148740542","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 popular place: Organochlorine compound profiles in sediments from Guanabara Bay, one of the most polluted estuarine systems worldwide","authors":"Mariana Santos Figueiredo de Freitas MSc,&nbsp;Cássia de Oliveira Farias PhD,&nbsp;Cláudia Hamacher PhD","doi":"10.1016/j.rsma.2026.105294","DOIUrl":"10.1016/j.rsma.2026.105294","url":null,"abstract":"<div><div>This study aimed to investigate the spatial distribution of persistent organic pollutants (POPs) in sediments from Guanabara Bay, a highly polluted urban estuary in Brazil where previous assessments have detected extremely high concentrations of these compounds in marine mammals, yet there is scarce information regarding POPs in marine sediments. Twelve polychlorinated biphenyls (PCBs) and 16 organochlorine pesticides were determined in 22 surface sediment samples, 10 from Guanabara Bay mangroves and 12 from the bay’s infralittoral zone. Samples were Soxhlet extracted, and organochlorine compounds were determined by GC/MS. The highest organochlorine pesticides concentrations comprised ΣDDTs (0.11–7.10 ng g⁻¹) and ΣHCHs (0.48 – 16.01 ng g⁻¹) in surface infralittoral and mangrove sediments, respectively, corroborating the historical local use of both groups of compounds. Regarding ΣPCBs (4.15 – 52.23 ng g⁻¹), a predominance of penta-, and hexachlorinated congeners was observed, present in high amounts in imported industrial products used in surrounding Guanabara Bay areas in the past. According to international criteria, the determined ΣHCHs concentrations present risks to the local biota associated with Guanabara Bay mangrove sediments, while ΣPCBs and ΣDDTs were above uncontaminated levels in several samples. Further investigations concerning organochlorine compounds profiles at Guanabara Bay, especially in top predators, alongside human health risk assessments, are paramount.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105294"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638158","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 and restoration potential of Ruppia maritima in a managed mosquito impoundment of the Indian River Lagoon, Florida, USA","authors":"Deanna F. Webber,&nbsp;Richard E. Mulroy,&nbsp;Patrick H. Monaghan,&nbsp;David C. Heuberger,&nbsp;M. Dennis Hanisak,&nbsp;Rachel A. Brewton","doi":"10.1016/j.rsma.2026.105271","DOIUrl":"10.1016/j.rsma.2026.105271","url":null,"abstract":"<div><div>In the Indian River Lagoon (IRL), FL, USA, catastrophic seagrass losses since 2011 have been driven by degraded water quality and recurring phytoplankton blooms, with limited natural recovery. At Bee Gum Point Preserve, a hydrologically modified mosquito impoundment along the IRL, persistent <em>Ruppia maritima</em> populations suggest potential for restoration applications. This study evaluated the life history and restoration potential of <em>R. maritima</em> through field monitoring, laboratory experiments, and aquaculture trials. Monthly monitoring of percent cover, biomass, and water quality was conducted at two sites in Bee Gum Point Preserve from 2021 to 2023, alongside seed bank assessments and germination experiments across salinity treatments. <em>R. maritima</em> plants were also collected and transplanted into aquaculture tanks to evaluate nursery performance. Field observations indicated that <em>R. maritima</em> functioned as an annual species with losses accelerated by the closing of the culverts and inundation of the impoundment with lagoon water, which degraded water quality. Laboratory trials showed that seed germination was strongly initiated by low salinity. Transplanted <em>R. maritima</em> was successfully cultivated and produced viable seeds. These findings suggest that <em>R. maritima</em> may be most appropriate for experimental restoration in disturbed, environmentally variable habitats that require rapid colonization and seed production. Field outplanting studies are still needed to develop restoration decision frameworks for practitioners. Given the cosmopolitan distribution of <em>R. maritima</em>, these results are relevant to restoration efforts in degraded estuarine systems globally.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105271"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638149","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}