Journal of Environmental Management最新文献

{"title":"Integrating regional forest productivity maps with supplemental data to optimize forest management priority: A case study in Ibiza (Spain)","authors":"Vicent A. Ribas-Costa ,&nbsp;Andrew Trlica ,&nbsp;Aitor Gastón","doi":"10.1016/j.jenvman.2025.125221","DOIUrl":"10.1016/j.jenvman.2025.125221","url":null,"abstract":"<div><div>Forest Management Priority (FMP) refers to the allocation of limited resources in forestry to achieve pre-established objectives. In Mediterranean forests, wildfire suppression is a primary focus yet challenges arise when forest management needs to be actively implemented. Additionally, productivity, a critical factor in FMP, is often overlooked. In response, we propose (1) a method to estimate forest productivity using remote sensing and (2) the integration of this data into a GIS-based Multiple-Criteria Decision Analysis (MCDA) framework with a participatory approach to propose a novel FMP index for Mediterranean forests. This method aims to enhance FMP by guiding resource allocation to key areas, using the island of Ibiza as a test case. Our approach to mapping forest productivity yielded a 20.4 % relative error in site index and 43.5 % in mean annual increment. Incorporating this data into the GIS MCDA allows decision-makers to evaluate multiple information layers also including wildfire risk, terrain slope, forest stress, accessibility, and landscape visibility. We tested five prioritization scenarios: high productivity, environmental protection, wildfire risk management, a multipurpose scenario, and a business-as-usual scenario. When comparing the FMP index distribution, most scenarios showed a broader prioritization of areas than current practices, highlighting opportunities for improvement. In the high productivity scenario, 0.903 M m³ of timber were categorized as high priority for management, translating to a mean annual growth of 20,539 m³. We believe this work provides a valuable framework for stakeholders to adopt better forest management practices, promoting bioeconomy and optimizing the use of limited public and private funds.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125221"},"PeriodicalIF":8.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Potential construction area identification of the transboundary national park bridging ecology, society and economics: A case study of Mount Everest region","authors":"Hu Yu ,&nbsp;Xinyue Hu","doi":"10.1016/j.jenvman.2025.125190","DOIUrl":"10.1016/j.jenvman.2025.125190","url":null,"abstract":"<div><div>In biodiverse border regions, establishing transboundary national parks is essential for conserving ecological integrity, promoting sustainable development, and enhancing cross-border cooperation. This study aims to develop an integrated hierarchical identification model that bridges ecology, society, and economics to support effective site selection. We introduce a novel model that comprehensively evaluates potential construction areas based on three criteria—irreplaceability, connectivity, and cost-effectiveness. The model categorizes the landscape into three priority zones: core ecological areas, connective ecological areas, and peripheral radiation areas. Key indicators such as ecosystem service value, landscape ecological risk, and human activity intensity are employed to assess these zones. Application of the model to the Mount Everest region identified a total potential area of 63,824 km² for the transboundary national park. Within this area, core ecological areas account for 22.54 %, connective ecological areas for 21.35 %, and peripheral radiation areas for 56.12 %. Significantly, disparities in ecosystem service value, ecological risk, and human activity intensity exist across the China–Nepal border, with indicator variations closely aligned with the corresponding priority zones. The findings underscore the need for China and Nepal to consider regional and national differences when planning future park construction. Tailored zonal management and a dynamic cooperative mechanism are key to sustainable and effective transboundary park development.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125190"},"PeriodicalIF":8.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Evaluating virtual fencing as a tool to manage beef cattle for rotational grazing across multiple years","authors":"Alexandra J. Harland ,&nbsp;Francisco J. Novais ,&nbsp;Carolyn J. Fitzsimmons ,&nbsp;John S. Church ,&nbsp;Gleise M. da Silva ,&nbsp;Maria C. Londono-Mendez ,&nbsp;Edward W. Bork","doi":"10.1016/j.jenvman.2025.125166","DOIUrl":"10.1016/j.jenvman.2025.125166","url":null,"abstract":"<div><div>Virtual fencing (VF) is a technology drawing attention for the management of grazing livestock under open-range conditions. This study investigated the use of VF collars to facilitate summer rotational grazing of beef cattle heifers and cow-calf pairs. Specifically, we evaluated the ability of cattle to initially learn and adapt to VF technology, and thereafter control their temporal and spatial use of pastures during the grazing season. Two years of rotational grazing were conducted using Nofence VF collars, with cattle also fitted with leg-mounted activity sensors. The first year involved yearling heifers naïve to VF, with the second year using the same animals as first-calf cows with calves. Heifers adapted to VF boundaries in 5–7 days, with an electrical pulse to audio cue ratio (E:A) of 17.9 % (±18.4) during training, decreasing to 5.2 % (±11.2) while rotational grazing. One year later, cows with prior VF experience had an E:A ratio of 1.6 % (±1.1 %) and 2.2 % (±1.6 %) during re-training and grazing, respectively. Cattle remained within VF boundaries more than 99 % of the time, though learning patterns varied by animal cohorts (age/reproductive groups), and among individuals. No associations were found between the number of VF stimuli and animal characteristics or performance. Animals with greater movement, as exhibited by step counts, experienced greater audio cues (<em>r</em>_<em>s</em> ≥ +0.087), and as heifers, greater electrical pulses (<em>r</em>_<em>s</em> = +0.21). Stocking rate had a direct positive association with the frequency of audio cues (<em>r</em>_<em>s</em> = +0.36) and electrical pulses (<em>r</em>_<em>s</em> = +0.25) for cows, but not heifers. We conclude that cattle can readily learn and be compliant with VF boundaries, and that VF technology can be used to facilitate rotational grazing through the remote movement of cattle among virtual paddocks. Overall, these findings support VF's potential to enhance cattle management flexibility and control forage use, thereby providing an innovative ‘fenceless’ tool to balance ongoing pasture use with grassland sustainability.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125166"},"PeriodicalIF":8.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Recovery of volatile ethanol gas via microalgal-bacterial consortium: Ethanol-to-acetate conversion pathway boosts lipid production","authors":"Liu-Xu Jiang,&nbsp;You-Wei Cui,&nbsp;Ya-Nan Mi,&nbsp;Dong-Xu Zhou,&nbsp;Ming-Teng Li,&nbsp;Rui-Chun Yang","doi":"10.1016/j.jenvman.2025.125210","DOIUrl":"10.1016/j.jenvman.2025.125210","url":null,"abstract":"<div><div>The pharmaceutical industry, an essential sector of the global economy, heavily relies on ethanol solvents, which leads to significant volatile organic compounds (VOCs) emissions. As a sustainable treatment method aligning with carbon reduction goals, this study proposed and demonstrated a synergistic approach of using microalgae (<em>Chlorella sorokiniana</em> FACHB-24) and acetic acid bacteria (<em>Acetobacter pasteurianus</em> CICC 20056) to recover ethanol into value-added products (algal lipids). In the innovative co-culture, <em>A</em>. <em>pasteurianus</em> oxidizes ethanol to acetic acid, which is fed to algae for lipid production. This method increased biomass and lipid yield by 21.29% and 150.16% (p &lt; 0.05), respectively, compared to microalgae directly using ethanol. Some operational parameters including ethanol concentration, bacterial-algal biomass ratio, pH value, and light intensity made influence on lipid production. Under the optimal conditions (1.0% v/v ethanol concentration, 1:10 bacterial-algal biomass ratio, pH 6.5, and 5000 lux light intensity), the maximal biomass and lipid yields were 572.5 mg L⁻¹ and 161.1 mg L⁻¹ (26.7% lipid content), respectively. In the harvested lipid from microalgae, C16 - C18 fatty acids made up 98.22% of the total fatty acid methyl esters content. In proteomic comparison of the single culture and co-culture, the conversion of ethanol to acetate by <em>A. pasteurianus</em> provides <em>C. sorokiniana</em> with a more efficient acetyl-CoA source by bypassing energy-intensive glycolysis and directly enhancing lipid synthesis. This study provides a solution to increasing the lipid production from ethanol gas as a sustainable VOCs management of pharmaceutical industry.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125210"},"PeriodicalIF":8.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Hydropower market dynamics in Norway: Evaluating the market value and volatility in the electricity sector","authors":"Kyriaki Tselika ,&nbsp;Stefan Jaehnert","doi":"10.1016/j.jenvman.2025.125087","DOIUrl":"10.1016/j.jenvman.2025.125087","url":null,"abstract":"<div><div>Energy markets are evolving to meet environmental challenges, such as the European Union’s (EU) ambition to become the first net-zero continent by 2050. A critical component in this transition is the decarbonization of the electricity sector, which requires a significant shift towards renewable energy sources. Hydropower stands out among these sources due to its flexibility and storage capabilities, which can mitigate the intermittency of wind and solar power. This paper examines the market value and market value volatility of hydropower in Norway, a country where hydropower plays an important role in electricity generation and is a significant contributor to Europe’s reservoir storage capacity. We use linear regression models to understand the relationships of various energy sources on hydropower market value and volatility, followed by a quantile regression to explore effects under different market conditions. Our findings reveal that Run-of-River and water reservoir hydropower have different impacts on market value. Run-of-River negatively affects market value in both regions, while water reservoirs positively impact NO2 and negatively impact NO1. When it comes to the volatility of hydropower in both regions, we find that almost all generation sources reduce market value volatility, including variable sources, such as wind generation. Additionally, the quantile regression analysis highlights that the different hydropower sources have varying impacts on the hydropower distribution. Despite the different generation mixes and market dynamics in the two regions, it seems that the electricity systems remain reliable due to the availability and complementarity of various sources in the electricity system. Market participants can utilize this information in developing profitable strategies that can enhance their overall market performance. On the other hand, the results can guide policy makers in designing regulations that support hydropower producers while including higher renewable generation in the electricity mix in Europe.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125087"},"PeriodicalIF":8.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Evaluation of fenton-like oxidation coupled with struvite precipitation for the enhanced treatment of Cu-contaminated ammoniacal nitrogen-rich wastewater","authors":"Maharaja P,&nbsp;Patchai Murugan K,&nbsp;Karthiyayini C,&nbsp;Sri Bala Kameswari K,&nbsp;Sudha D,&nbsp;Sabarishwaran G,&nbsp;Sekaran G","doi":"10.1016/j.jenvman.2025.125204","DOIUrl":"10.1016/j.jenvman.2025.125204","url":null,"abstract":"<div><div>Discharging highly concentrated ammonia-containing wastewater directly to the environment causes significant environmental degradation. This work has enlightened the recovery of ammoniacal nitrogen from copper-containing Nitrogen-rich wastewater (Cu-NWW) through struvite precipitation followed by a Fenton-like copper oxidation process (CFO). Initially, Cu-NWW was treated through the CFO process by adding 10 mM of H₂O₂ (30 % <em>w/v</em>) and Nanoporous Activated Carbon (NAC) as a heterogeneous catalyst at an optimized reaction time of 120 min. CFO process exhibited the removal of Chemical Oxygen Demand (COD), 82 %; Biochemical Oxygen Demand (BOD₅), 73 %; and Total Organic Carbon (TOC), 78 % in Cu-NWW. It also noted that the elimination of COD and TOC by the CFO process increases the purity of struvite crystal. The presence of copper was removed before struvite precipitation by adding 10 % Na₂S solution. Further, the stoichiometric molar ratio of Mg²⁺, NH₄⁺, and PO₄³⁻ ions was optimized for struvite precipitation. The struvite precipitation was then carried out with and without removing Cu ions in Cu-NWW, and the reaction time, the addition of magnesium oxide (MgO), Spent phosphoric acid (SPA), and reaction pH were optimized. The second-order rate reaction follows the rate of the formation of struvite. The integrated CFO process and struvite precipitation achieved 92 % COD removal, 97 % ammoniacal nitrogen removal, and over 99 % Cu removal. This treatment approach is highly suitable for industries generating waste streams containing a combination of COD, ammoniacal nitrogen, and metal ions.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125204"},"PeriodicalIF":8.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 variability of lacustrine groundwater discharge and pollutant fluxes in the sandy-land lake group basins: Influence from land use types","authors":"Shen Qu ,&nbsp;Xiangwei Li ,&nbsp;Ao Gao ,&nbsp;Yuanzhen Zhao ,&nbsp;Keyi Zhang ,&nbsp;Yiwei Zhang ,&nbsp;Dongchao Huo ,&nbsp;Bowen Ye ,&nbsp;Zongbao Yue ,&nbsp;Renpu Wang ,&nbsp;Hongli Ma ,&nbsp;Ping Miao ,&nbsp;Ruihong Yu","doi":"10.1016/j.jenvman.2025.125224","DOIUrl":"10.1016/j.jenvman.2025.125224","url":null,"abstract":"<div><div>Deciphering lacustrine groundwater discharge (LGD) processes and pollutant fluxes in sandy-land lake basins remain difficult due to the complex hydrogeological conditions and land use types. In this study, the spatial variability of LGD in a sandy-land lake group (Bahannao Lake Group Basin) was quantitatively estimated using the radon (²²²Rn) mass balance model. The 5 lakes in the study area, with their various land use and hydrogeological conditions, were categorized into 3 ranges based on LGD rates: &lt;20.0 mm/d (Shenhaizi Lake: 10.81 mm/d), 20.0–35.0 mm/d (Wulannao Lake: 27.21 mm/d, Bahannao Lake: 30.21 mm/d) and &gt;35.0 mm/d (Guangmingnao Lake: 36.78 mm/d, Manaihu Lake: 43.58 mm/d). From an entropy weighted quality index and hydrochemical analysis, NO₃⁻, TN, TDS, Cl⁻ and Na⁺ from evaporite dissolution and human inputs were the dominant pollutants in the study area. On this basis, the patterns of pollutant fluxes were consistent with LGD rates in the 5 lakes. It was found that the spatial variability of LGD processes in sandy-land lake group basins was controlled mainly by evaporation loss, land use patterns, and industrial and agricultural activities. This study provides new insights into the spatial variability of LGD for global sandy-land lakes in a changing environment.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125224"},"PeriodicalIF":8.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Qualitative and quantitative assessment of Sargassum valorisation solutions for the Caribbean","authors":"M. Bennett ,&nbsp;A. March ,&nbsp;H. Li ,&nbsp;P. Lallemand ,&nbsp;J.-P. Maréchal ,&nbsp;P. Failler","doi":"10.1016/j.jenvman.2025.124954","DOIUrl":"10.1016/j.jenvman.2025.124954","url":null,"abstract":"<div><div>The valorisation of Sargassum biomass into various products is seen as a promising solution to mitigate the environmental and economic disruptions caused by massive Sargassum inundations in the Caribbean region. Different applications of Sargassum valorisation have previously been explored but economic assessments of these solutions are absent from publicly available literature which has hindered informed investment support decisions aimed at addressing the biomass influx. A semi-qualitative stakeholder-engagement approach was used to assess 12 Sargassum value chains, with the aim to identify valorisation solutions favourable for investment support and provide indicative costs of implementation. Value chains included biochar; biogas; biofuel; construction materials; liquid bioplastic; powdered bioplastic; flake fertiliser and compost; liquid fertiliser; powdered fertiliser; biotechnological chemical derivation; Sargassum for consumption; and Traditional Chinese Medicine (TCM). The assessment included qualitative comparison according to indicators for an effective solution regarding Sargassum resource dynamics and the Caribbean development context. Quantitative assessment involved model development to compute internal rate of return (IRR), net present value (NPV), and payback period for each solution. Simple value chains were developed as the basis for comparison, and data from previous research and current market prices were used. Biochar, biogas, and compost and fertiliser value chains were recommended for investment support due to favourable model indicators (positive IRR and NPV, low payback period), low-startup investment requirements, scalability potential, low technological processing and skills requirements, value addition potential, adaptability to varied quality of Sargassum biomass and supply challenges, and capacity to consume large amounts of biomass for addressing mass inundations.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 124954"},"PeriodicalIF":8.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"External voltage regulates hydrogen and vivianite recovery from fermentation liquid in microbial electrolysis cell equipped with iron anode: Performance and mechanism","authors":"Ting Zhao ,&nbsp;Zhihong Liu ,&nbsp;Zhengtong Guo ,&nbsp;Xiaoyun Yin ,&nbsp;Wenhai Zhu ,&nbsp;Zhangwei He ,&nbsp;Wenzong Liu ,&nbsp;Xiuping Yue ,&nbsp;Aijuan Zhou","doi":"10.1016/j.jenvman.2025.125209","DOIUrl":"10.1016/j.jenvman.2025.125209","url":null,"abstract":"<div><div>Employing an iron anode in microbial electrolysis cell (MEC) can promote hydrogen yield and vivianite recovery from waste biomass by accelerating electron transport, but the performance is highly dependent on the functional microbial community present and the ferrous ion content. An external voltage had a significant effect on enriching functional microbes and controlling the release of ferrous ions. In this study, the effects of different voltages, i.e., 0.4 V, 0.6 V, 0.8 V and 1.0 V, on hydrogen production and vivianite recovery were explored. The results indicated that an applied voltage of 0.8 V resulted in the maximum hydrogen productivity of 11.17 mmol/g COD, representing an increase of 18∼91 % compared with the other voltage conditions. The removal efficiency of phosphorus reached 100 % at 3 d in the 0.8 V group, with vivianite as the main product at a purity of 92.7 %. An external voltage of 0.8 V notably enhanced the electrochemical performance of the MEC. The relative abundances of bio-cathodic microbes, i.e., electrochemically active bacteria, anaerobic fermentation bacteria, dissimilatory iron-reducing bacteria and homoacetogens, greatly changed with different voltages, reaching 9.6 %, 3.2 %, 3.1 % and 23.7 %, respectively, in the 0.8 V group. The expression of key functional genes related hydrogen production, i.e., the ferredoxin-dependent hydrogenase pathway and pyruvate ferredoxin oxidoreductase pathway, was significantly upregulated, whereas that related to homo-acetogenesis was downregulated under 0.8 V. This work reveals the performance and mechanism of synergistic hydrogen production and phosphorus recovery under an applied voltage, and provides new insights and feasible measures for improving hydrogen production and phosphorus recovery in MECs.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125209"},"PeriodicalIF":8.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"U-shaped deep learning networks for algal bloom detection using Sentinel-2 imagery: Exploring model performance and transferability","authors":"Ismail Colkesen ,&nbsp;Mustafacan Saygi ,&nbsp;Muhammed Yusuf Ozturk ,&nbsp;Osman Yavuz Altuntas","doi":"10.1016/j.jenvman.2025.125152","DOIUrl":"10.1016/j.jenvman.2025.125152","url":null,"abstract":"<div><div>Inland water sources, such as lakes, support diverse ecosystems and provide essential services to human societies. However, these valuable resources are under increasing pressure from rapid climate changes and pollution resulting from human activities. Combining remote sensing technologies with advanced artificial intelligence algorithms enables frequent monitoring of these ecosystems, timely detection of potential threats, and effective conservation measures. This study evaluated U-shaped deep learning (DL) networks, including U-Net, Residual U-Net (RU-Net), Attention U-Net, Attention Residual U-Net (ARU-Net), and SegNet, for detecting and mapping algal blooms using Sentinel-2 satellite imagery. Multitemporal Sentinel-2 imagery spanning different dates was used to construct robust DL models, with ground truth datasets representing both high- and low-density algae formations. The study emphasized the importance of diverse datasets in addressing the limitations of previous models, particularly in detecting low-density blooms and generalizing across temporal and geographical contexts. The models' transferability was assessed using imagery from different dates and geographical locations, including Lake Burdur, Lake Chaohu, and Lake Turawskie. RU-Net and ARU-Net consistently outperformed other models, achieving exceptional F-scores, such as 99.80 % for Lake Burdur, 97.23 % for Lake Chaohu, and 99.61 % for Lake Turawskie. ARU-Net demonstrated superior generalization capabilities, effectively detecting low-density algae, which is critical for comprehensive environmental assessments. These findings underscored the efficacy and transferability of U-shaped DL networks in accurately detecting algal blooms, offering valuable insights for environmental monitoring and management applications.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"381 ","pages":"Article 125152"},"PeriodicalIF":8.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}