Anthropocene Coasts最新文献

{"title":"Coastal multi-hazard assessment and management of chronic geomorphological degradation in Pemalang, Indonesia","authors":"Bachtiar W. Mutaqin,&nbsp;Annisa Ayu Fawzia,&nbsp;Prima Dinta Rahma Syam,&nbsp;Bayu Pamungkas,&nbsp;Dodi Mivanto,&nbsp;Dinda Alyani Shabrina","doi":"10.1007/s44218-026-00138-9","DOIUrl":"10.1007/s44218-026-00138-9","url":null,"abstract":"<div><p>The coastal area of Pemalang Regency, Indonesia, faces escalating multi-hazard threats exacerbated by climate change, yet it remains an under-prioritized region for disaster management. This study analyzes the coastal characteristics of Pemalang and assesses multi-hazard levels using the Coastal Hazard Wheel (CHW) approach, evaluating parameters such as geological layout, wave exposure, tidal range, flora, sediment balance, and storm climate. Results reveal a heterogeneous landscape experiencing chronic geomorphological degradation. The coastal area is characterized by protected wave exposure and microtidal dynamics; however, driven by widespread volumetric sediment deficits, 73% of the shoreline is undergoing severe planimetric erosion, primarily concentrated in the eastern deltaic regions. Through the CHW framework, five distinct coastal typologies were identified, i.e., sedimentary plains (PL-14, PL-16), deltas (DE-14, DE-16), and river mouths (TSR), each exhibiting varying hazard profiles. Ecosystem disruption and inundation intensities range from moderate to very high, while saltwater intrusion and tidal flooding hazards are classified as moderate to high. The findings highlight critical hazard hotspots in deltaic and river mouth zones, where anthropogenic pressures and sediment deficits create cascading hazards. Ultimately, this study prioritizes 22 management interventions, advocating for a transition from administrative-based zoning to a hybrid strategy that integrates Nature-based Solutions (NbS) with structural flood-proofing. These results provide a strategic blueprint for government authorities to implement adaptive management and enhance long-term coastal resilience in Pemalang.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00138-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated farmland ditch-pond systems for flood regulation and nutrient removal in deltaic region under climate change: a case study from Shanghai","authors":"Xiaohua Chen,&nbsp;Min Zhang,&nbsp;Yiyang Liu","doi":"10.1007/s44218-026-00126-z","DOIUrl":"10.1007/s44218-026-00126-z","url":null,"abstract":"<div><p>Climate change has intensified hydrological extremes in many deltaic coastal zones, amplifying both flood hazards and agricultural non-point source (NPS) pollution. The newly reclaimed deltaic farmland in coastal Shanghai represents a typical climate-sensitive agroecosystem where irrigation and rainfall jointly drive nutrient losses. This study employs a high-frequency, flow-triggered hydrological and water-quality monitoring system capable of distinguishing irrigation-driven versus rainfall-driven runoff to evaluate the performance of a constructed ditch–pond system (DPS). It provides the first field-based assessment of DPS functioning in such reclaimed coastal farmland, where irrigation dominates early-stage nutrient export. By integrating water-level, Doppler flow, and event-scale nutrient measurements, we further examine DPS regulation of flood peaks and nutrient retention. The results indicate that: (1) Irrigation-driven runoff accounted for more than 80% of total nitrogen and ammonium losses, particularly within 10 days after fertilization, highlighting a critical early-loss window. (2) The DPS demonstrated strong nutrient retention capacity, with removal efficiencies of 56.2–91.2% for TN, 17.2–96.2% for AN, and 30.1–91.4% for TP, driven by enhanced residence time and internal biogeochemical processing. (3) Hydrological regulation was substantial, as the DPS attenuated typhoon-induced flood peaks by up to 37.8% and delayed runoff propagation across the field–ditch–pond continuum. Event-triggered reuse of pond water during fertilization reduced nutrient discharge and improved fertilizer use efficiency. Overall, this study provides an integrated hydrological–biogeochemical evaluation of DPS performance and demonstrates that such systems offer a practical, low-cost nature-based solution for mitigating NPS pollution and flood risks in vulnerable deltaic agricultural landscapes under intensifying climate pressures.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00126-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Suspended sediment budget and stability of the River Don Delta in the period from 1944 to 2020","authors":"Sergey V. Berdnikov,&nbsp;Sergey Venevsky,&nbsp;Aleksey V. Kleshchenkov,&nbsp;Igor V. Sheverdyaev,&nbsp;Valerii V. Kulygin,&nbsp;Nataliya V. Likhtanskaya,&nbsp;Vera V. Sorokina","doi":"10.1007/s44218-026-00135-y","DOIUrl":"10.1007/s44218-026-00135-y","url":null,"abstract":"<div><p>The River Don Delta (RDB) and the adjacent estuary and land areas have significant ecological and economic value. RDB is the most eastern in the Mediterranean – Black Sea (MBS) basin delta, and it has similar problems with many other MBS deltas. So, the delta became sediment-starved due to the construction of dams upstream. Additionally, the geomorphological stability of RDB is threatened by regional climate changes over the sea and land, which became especially apparent starting from 1980th. In this study, we reconstructed suspended sediment budgets in different parts of the delta and the adjacent estuary and land areas in the period from 1944 to 2020 and analyzed the changes in the delta channel’s width and at the sea border starting from 1980th. We used the modelling framework, consisting of the modified hydrodynamic model HEC RAS and the large-scale sediment budget model, as well as satellite image analysis. We estimated suspended sediment balance in the front-delta, the delta channels, and the delta platform and at the adjacent land area for the three periods 1944–1973, 1974–1981, and 1982–2020, which are related to the construction of large dams in the River Don Basin. The sediment accumulation rates were similar to those of other MBS deltas. Suspended sediment budget dropped three times for the entire case study area from 1944–1973 to 1982–2020. At the same time, the percentage of accumulated sedimentation to the fluvial sediment delivery increased almost five times from the first to the third period. This proves that sea factors, seiches and storm surges, play a stabilizing role for the River Don Delta by increase in suspended sediment budget during the hydrological interaction of sea and river waters. Observed total annual channel width within the delta changes in line with sedimentation accumulation patterns in the delta channels for the period of environmental changes that started in 1980th. The delta’s sea border stabilizes in the period 1982–2020 due to the influence of the sea factors, seiches, and increased storm surges upon sedimentation patterns. Our findings allow us to conclude that engineering regulation of sedimentation is not necessary now in the River Don Delta.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00135-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stratigraphic records of microplastic deposition in Puerto Rico coastal sediments: a focus on hurricane impacts","authors":"Nicholas Culligan,&nbsp;Kam-biu Liu,&nbsp;Thomas A. Bianchette","doi":"10.1007/s44218-026-00136-x","DOIUrl":"10.1007/s44218-026-00136-x","url":null,"abstract":"<div><p>Microplastic in the coastal environment is a massive global problem that has only recently been identified, even though widespread plastic usage and subsequent disposal in the environment have occurred since ~1950 CE. Unfortunately, the vast majority of studies on microplastic focus on surficial sediments rather than investigating microplastic concentrations in three dimensions. We remedy the paucity of studies on this understudied topic by examining two sediment cores from the southern and northern coasts of Puerto Rico. The Guayama study site is a protected lagoon in a rural, arid region, whereas the Levittown site is an unprotected tidal lagoon in an urban/suburban area. Despite their differences, both sites contained microplastic in quantifiable amounts, though relatively low compared to other global sites. Compared with Levittown, Guayama contained a lower total amount (48 vs 72), a lower concentration (79 MP/kg vs 116 MP/kg), and less variety of morphotypes (1 vs 4). Radiometric dating on both cores confirmed an increase in microplastic deposition in recent sediments. Only the Guayama site contained sediment that was deposited prior to 1950 CE, and microplastic was found below this sediment horizon, suggesting post-depositional transport likely via bioturbation. Additionally, hurricane event layers were identified using sedimentary and geochemical data (particularly terrestrial signals) which corresponded with increased microplastic concentration, suggesting that hurricane-induced terrestrial flooding is likely responsible for the transport and deposition of high quantities of microplastic into the coastal region. This study is the first to investigate sedimentary microplastic in three dimensions in Puerto Rico, providing information on multiple novel aspects of microplastic transport and deposition in coastal sediments.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00136-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plugging climate‑risk tool into an integrated management model for coastal adaptation","authors":"Aikaterini Karditsa,&nbsp;Theodora Paramana,&nbsp;Maria Hatzaki,&nbsp;Roland Cormier","doi":"10.1007/s44218-026-00133-0","DOIUrl":"10.1007/s44218-026-00133-0","url":null,"abstract":"<div><p>Adaptation to Climate Change (CC) impacts, Sea Level Rise (SLR) in particular, necessitates the application of Ecosystem Management Tools such as environmental risk assessments, impact assessments and impact management tools, that directly operate in a cause-consequence-response framework and suggest actions at various levels. In this contribution, an effort to support SLR adaptation planning in response to CC impacts on coastal tourism is made, through the integration of the IPCC Sixth Assessment Report (AR6) assessment framework and the DAPSI(W)R(M) framework, as well as the practical integration of the Impact Chain (IC) Tool and Bow-Tie Analysis. The proposed approach uses the Bow-Tie Analysis as a policy tool to fine-tune adaptation management plans in order to address the CC impacts on the coastal tourism sector, as they have been identified by the prior application of IC Tool, following IPCC AR6. The integration of the two approaches forms a framework able to support a concrete schema to address SLR induced beach retreat. The Bow-Tie analysis acts complementarily to the IC tool to structure potential mitigation and adaptation actions addressing the raised issues and respond to CC. The interrelation of the two frameworks enables climatic risk assessment and allows the identification of appropriate management measures addressing the specific components and facilitating the effective preparation for the forthcoming climatic conditions.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00133-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative study of science-based monitoring methods for coral reef ecological disaster mitigation in the Spermonde Archipelago","authors":"Jamaluddin Jompa,&nbsp;Funty Septiyawati Polapa,&nbsp;Abigail Mary Moore,&nbsp;Suharto M. Ali,&nbsp;Amanda Pricella,&nbsp;Syafyudin Yusuf,&nbsp;Jamaluddin Fitrah Alam","doi":"10.1007/s44218-026-00128-x","DOIUrl":"10.1007/s44218-026-00128-x","url":null,"abstract":"<div><p>Coral reef degradation in the Spermonde Archipelago has reached alarming levels, driven by natural and anthropogenic factors. This study integrated quantitative (community perception surveys, ecological monitoring using Line Intercept Transect (LIT), Underwater Photo Transect (UPT), and drone methods) and qualitative (Focus Group Discussion - FGD) approaches to analyze coral reef conditions and design a community-based mitigation model. The results showed that: (1) There is a gradient in coral reef damage closely related to water quality, with Lae-Lae Island (turbid waters) dominated by dead coral and coral debris, while Lanyukang Island (clear waters) maintains significant live coral cover; (2) Community awareness of degradation is high (58% of respondents stated that conditions are worsening), but understanding of ecological mechanisms particularly the relationship between nutrient waste and algal blooms remains limited; (3) Readiness to participate in mitigation varies (only 29.4% are very ready), with the main barriers being a lack of experience, tools, and funding; (4) Integration of monitoring methods (LIT, UPT, drone) and local knowledge resulted in site-specific mitigation models: waste management and substrate restoration in Lae-Lae, hybrid patrol and coral transplantation in Kodingareng Lompo, and strengthening regulations and sustainable ecotourism in Lanyukang. This study concluded that the effectiveness of mitigation depends on the synergy between scientific data, local knowledge, and multidimensional partnerships that empower communities as key conservation actors.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00128-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing habitat risk to support marine spatial planning in Indramayu’s Coastal Zone, Indonesia","authors":"Danang Pramudita,&nbsp;Akhmad Fauzi,&nbsp;Thi Kim Anh Nguyen","doi":"10.1007/s44218-026-00131-2","DOIUrl":"10.1007/s44218-026-00131-2","url":null,"abstract":"<div><p>An ecosystem-based approach in spatial planning can provide valuable insight for assessing the benefits obtained from various space zoning. Spatial planning in coastal areas needs to be carried out comprehensively by understanding the impacts of human activities on coastal habitats. This study examined the risks posed to mangrove habitats in the Indramayu coastal area, West Java Province, Indonesia by stressors stemming from aquaculture, agriculture, and settlements. We employed the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST), Habitat Risk Assessment model to assess locations where mangrove habitats are at high risk and to identify the contributing stressors. We analyzed the current distribution of habitats and coastal activities and developed three scenarios for zoning these activities in the future. The results showed that habitat risk values varied across the five sub-districts in Indramayu. The analysis indicates that high-risk levels are most associated with low mangrove densities, with aquaculture identified as the primary stressor impacting high-risk levels. Intensive intervention is required to address aquaculture stressors, while low-intensity intervention is sufficient for agriculture and settlement stressors. Based on scenario analysis, the inclusion of potential mangrove areas in both scenarios demonstrated an apparent reduction in the habitat's risk levels to stressors compared to the baseline. These results expand our knowledge to understand how the stressors impact the mangrove habitat under current and future management scenarios. Furthermore, the study provides insight for coastal planners to plan development activities that will minimize pressure on mangrove habitats.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00131-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147607348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coping with tidal waves: households and institutional financing support mechanisms for climate resilience in storm ravaged coastal communities in Ghana","authors":"Shine Francis Gbedemah,&nbsp;Godwin Kosi Amenyogbe,&nbsp;Louis Kusi Frimpong,&nbsp;Stephen Leonard Mensah,&nbsp;Selase Kofi Adanu","doi":"10.1007/s44218-026-00130-3","DOIUrl":"10.1007/s44218-026-00130-3","url":null,"abstract":"<div><p>Coastal towns are becoming increasingly vulnerable to climate-induced hazards such as storm surges and coastal floods. These hazards lead to the destruction of critical infrastructure, social stability, and livelihoods. In response, researchers, practitioners, and policy makers have emphasised the need for sustainable financing to address the impact of climate-induced hazards in at-risk communities. Yet little scholarly attention has been given to the mechanisms deployed at both household and institutional levels to cope with and recover from the impact of climate-induced hazards. This study examines the impact of storm surges in coastal communities in Ghana and explores various mechanisms deployed to finance household coping mechanisms. The paper employs a mixed-methods approach, combining qualitative data with quantitative data from household surveys, to assess the socioeconomic impact of storm surges. Results reveal that 78% of respondents experienced significant income losses, with 57% reporting school dropout among dependents and 26% expressing concerns about food insecurity. Property damage, especially to housing and fishing gear, has severely affected livelihoods. Despite available climate finance mechanisms, only 16% identified government support during crises, while 54% sought assistance from informal networks like friends and family. Systemic challenges, including inefficient bureaucratic processes and inadequate institutional capacity, hinder effective climate financial assistance and other support mechanisms. The study suggests prioritising sustainable recovery initiatives, strengthening local institutional capacity, and integrating climate funding into community-based strategies to enhance resilience, ultimately contributing to a better understanding of climate resilience and offering actionable recommendations for foreign donors, NGOs, and policymakers to support Ghana's coastal communities.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00130-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147440970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Why do offshore breakwaters trap low levels of fine-grained sediments? Insights from Vietnam","authors":"Huynh Van Quoc,&nbsp;Nguyen Ba Cao,&nbsp;Pham Nhat Truong,&nbsp;Nguyen Bao Thuan,&nbsp;Nguyen Ngoc Tien,&nbsp;Nguyen Tan Phong,&nbsp;Hau Nguyen Quoc","doi":"10.1007/s44218-026-00129-w","DOIUrl":"10.1007/s44218-026-00129-w","url":null,"abstract":"<div><p>Offshore structures were originally designed to protect sandy beaches, but they are increasingly being built to protect mangrove-dominated muddy coasts from further erosion. So far, these structures have had limited success in trapping sediments. It is unclear whether these offshore breakwaters were installed in the most suitable locations for sediment accumulation. We selected hollow triangular offshore breakwaters in Tan Thanh, Tien Giang, Vietnam (herein called the Tan Thanh HTBs), Tien Giang in Vietnam as a case study to partially address this question. Using the MIKE 21/3 Coupled Model FM, we developed sedimentation scenarios related to the positions of the Tan Thanh HTBs taking into account detailed field observations made during site visits. Our findings showed that the Tan Thanh HTBs were not installed adequately due to their positions in areas with low total gross depositional accumulation (150–200 kg/m² in the dry season and 200–250 kg/m² in the wet season), low suspended sediment concentrations (0.1–0.2 kg/m³ in the dry season and 0.3–0.4 kg/m³ in the wet season), and in the wrong sediment transport direction. This partly explains the low amount of sediment accumulation in the areas in front and behind the Tan Thanh HTBs. The findings of the study will serve as a technical reference for future lessons and replication.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00129-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147441094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomonitoring of total petroleum hydrocarbons contamination in coastal sediments and accumulation in Tympanotonus fuscatus var. radula from Rivers State, Nigeria","authors":"Davies Ibienebo Chris,&nbsp;Amarachi Paschaline Onyena","doi":"10.1007/s44218-026-00132-1","DOIUrl":"10.1007/s44218-026-00132-1","url":null,"abstract":"<div><p>Petroleum hydrocarbon contamination in coastal environments poses significant ecological and human health concerns, yet bioaccumulation dynamics in benthic organisms remain underexplored in the Niger Delta. This study investigated the spatial and temporal variation of total petroleum hydrocarbons (TPHs) in sediments and <i>Tympanotonus fuscatus</i> var. <i>radula</i> (<i>Tf</i> var. <i>radula</i>) across three stations in Rivers State, Nigeria, using standard analytical protocols between January and June 2023. Sediment TPHs exhibited pronounced spatial heterogeneity, with Station 2 recording the highest mean concentration (3.076 ± 0.15 mg/kg) and Station 1 the lowest (2.786 ± 0.12 mg/kg). Temporally, sediment TPHs increased from January and peaked in March (3.40 ± 0.06 mg/kg) before declining towards June (3.10 ± 0.04 mg/kg). TPH concentrations in <i>Tf</i> var. <i>radula</i> showed a narrow spatial range (1.23 ± 0.07 to 1.25 ± 0.06 mg/kg), indicating consistent but measurable accumulation in this benthic species. Bioaccumulation factor analysis revealed strong enrichment of selected compounds, notably benzene (up to 130), n-pentadecane (up to 480), and n-hexadecane (up to 520), reflecting selective uptake of individual hydrocarbon fractions. Although sediment TPH concentrations were below the EGASPIN intervention limit, the persistence of petroleum hydrocarbons and their bioaccumulation in an edible mollusc highlight the need for continuous monitoring and strengthened pollution control to safeguard sediment quality, seafood safety, and ecosystem health in coastal waters of Rivers State, Nigeria.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44218-026-00132-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147440971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}