Journal of Environmental Management最新文献

{"title":"Immobilization-mediated algae-bacteria interactions improve swine wastewater treatment and microalgal biomass energy conversion: Performance, correlation and microscopic mechanisms","authors":"Bo Sun ,&nbsp;Xuemei Yao ,&nbsp;Zhenye Tong ,&nbsp;Hong Yang ,&nbsp;Junmei Qin ,&nbsp;Wenlong Bi ,&nbsp;Xingxing Qiao ,&nbsp;Qingjie Hou ,&nbsp;Fenwu Liu","doi":"10.1016/j.jenvman.2026.129810","DOIUrl":"10.1016/j.jenvman.2026.129810","url":null,"abstract":"<div><div>Swine wastewater contains extremely high levels of chemical oxygen demand, nitrogen, phosphorus, and other pollutants, posing serious risks to farm ecosystems and public health. Traditional treatment methods often fail to simultaneously achieve high pollutant removal and resource recovery. This study systematically elucidated the mechanisms underlying swine wastewater treatment and enhanced resource conversion efficiency by <em>Chlorella pyrenoidosa</em>, with particular focus on algae-bacteria interactions regulated in different COD loading by immobilization. The results indicate that immobilization restructures microbial competition and facilitates algal dominance at COD₀ = 1000 mg L⁻¹, enabling <em>C. pyrenoidosa</em> to maintain higher cell activity, photosynthetic capacity, and biomass production compared with suspended cultures, which effectively enhances the removal and conversion efficiency of pollutants. After immobilization of <em>C. pyrenoidosa</em>, conversion efficiencies of carbon, nitrogen, and phosphorus in wastewater reached 83.43%, 97.99%, and 91.87%, representing 1.41-, 3.40-, and 2.67-fold increases over the suspended state, respectively. Consequently, lipid and total protein production were enhanced by 4.0- and 1.2-fold. The immobilization has potential functions in promoting the expression of stress resistance-related proteins and genes of bacterial community, thereby enhancing its tolerance to wastewater and improving treatment efficiency. Dehydrogenase activity and chlorophyll content increased by 47% and 101.66%, respectively, further supporting enhanced physiological performance. This study reveals the mechanism of <em>C. pyrenoidosa</em> in swine wastewater treatment and provides a theoretical basis for designing high-performance immobilized algal systems, offering a promising approach for integrated wastewater treatment and resource recovery in swine wastewater.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"406 ","pages":"Article 129810"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147758904","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":"Effects of oxygen supply mode on linear alkylbenzene sulfonate removal during greywater treatment by oxygen-based membrane biofilm reactor","authors":"Yuxin Zhu,&nbsp;Xiaocai Cui,&nbsp;Yangrui Huang,&nbsp;Yun Zhou","doi":"10.1016/j.jenvman.2026.129804","DOIUrl":"10.1016/j.jenvman.2026.129804","url":null,"abstract":"<div><div>The oxygen-based membrane biofilm reactor (O₂-MBfR) has garnered increasing attention for its ability to remove linear alkylbenzene sulfonate (LAS), a widely used surfactant, from greywater for reuse while avoiding foam-related issues. However, the influence of the O₂ supply mode on aerobic LAS removal remains unclear. Advancements in this area could improve O₂ utilization efficiency, thereby reducing additional costs from increased aeration or advanced membrane materials. In this study, parallel and tandem O₂ supply modes were compared by evaluating LAS mineralization and metabolisms in the O₂-MBfR. The results demonstrated that the tandem mode achieved more efficient O₂ utilization for pollutant removal. During the first 45 days, average removal ratios for chemical oxygen demand, total nitrogen and LAS were 85.8% vs. 89.2%, 68.8% vs. 83.0% and 92.9% vs. 95.3% between tandem and parallel modes, respectively. In addition, the effluent under the tandem mode exhibited improved biological stability. Mechanistic study revealed that the tandem mode increased protein and α-polysaccharide proportions in biofilms, resulting in thinner yet more compact structures with stronger resistance to hydraulic shocks. The tandem mode also promoted the growth of LAS-degrading bacteria. For instance, the abundance of the <em>Pseudomonas</em> genus participating in the initial steps of LAS biodegradation was 1.25-4.76 times as much as that under the parallel mode. Furthermore, statistically more LAS-degrading enzymes (e.g., acyl-CoA dehydrogenase) were enriched under the tandem mode. These findings highlight a great potential of implementing the tandem O₂ supply mode in push-flow O₂-MBfRs to achieve high-efficiency LAS removal while reducing costs.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"406 ","pages":"Article 129804"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147758934","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":"Poly(deep eutectic solvent)@MOF-801 for technical surveillance of carbaryl: Pesticide residue safety control strategy.","authors":"Xicheng He, Yumin Yang, Ying Cao, Ziming Wang, Haixiang Li, Zhiliu Liu, Yan Wang, Fengyun Li, Qian Zhang, Abdulla Yusuf, Feiran Li, Mi Hu, Yadan Deng, Xiyue Wang, Zhaoyi Liu, Weibo Sun, Hui Wang, Xiaoxia Li","doi":"10.1016/j.jenvman.2026.129419","DOIUrl":"10.1016/j.jenvman.2026.129419","url":null,"abstract":"<p><p>Carbamate pesticide residues in agricultural water and crops pose a significant threat to ecological safety and human health. In this research, a DES-mediated surface molecular imprinting strategy was developed to construct a high-performance adsorbent, PDES@MOF-801, for the selective removal of carbaryl from Poria cocos, a medicinal-food homologous crop. A zirconium-based MOF-801 was employed as the substrate, while a deep eutectic solvent (DES, choline chloride-acrylic acid, 1:2) was introduced as a functional monomer and transient structural regulator to guide imprinting-site formation. Density functional theory (DFT) calculations were integrated as a design-guiding tool to elucidate the formation, dissociation, and reconstruction of high-affinity recognition cavities at the molecular level. Adsorption experiments demonstrated that PDES@MOF-801 exhibited a high adsorption capacity (30.33 mg/g), a favorable imprinting factor (2.83), and stable performance over five reuse cycles. In practical sample analysis, the material achieved efficient removal of carbaryl from Poria cocos, with recoveries of 99.4-105.8%, a detection limit of 0.056 mg/L, and a quantification limit of 0.188 mg/L. Overall, this work establishes a mechanistically informed and efficient imprinting strategy for carbamate pesticide removal, providing a sustainable solution for pesticide residue monitoring, pollutant control, and agricultural quality management.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129419"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147493297","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":"Remediation of cadmium-contaminated soils by mercaptosuccinic acid-intercalated hydrotalcite: Effects on soil quality and cadmium accumulation in rice.","authors":"Liqin He, Changfeng Ding, Min Nie, Ting Li, Ziyao Li, Taolin Zhang, Yurong Wang, Xingxiang Wang","doi":"10.1016/j.jenvman.2026.129506","DOIUrl":"10.1016/j.jenvman.2026.129506","url":null,"abstract":"<p><p>Cadmium (Cd) contamination poses a significant threat to human health due to its ability to accumulate in the food chain. Evaluations of materials used for Cd immobilization have tended to neglect the effects of these materials on soil quality. This study investigated the effects of mercaptosuccinic acid-intercalated hydrotalcite (MSA-CFA) on Cd-contaminated soils. MSA-CFA was found to significantly reduce Cd levels in brown rice by 50.25% in pot experiments and 56.52% in micro-plot field trials, markedly more effective than Lime and layered double hydroxides (LDHs). Bioavailable Cd was reduced by 96.15% in MSA-CFA-treated soils, similar to lime, while the bioavailable Fe, Mn, and Zn were reduced by only 23.98%, 58.42%, and 23.05%, respectively, significantly lower than Lime (67.88%, 87.71%, and 53.55%, respectively). MSA-CFA increased the proportion of soil aggregates of >2 mm, associated with the sequestration of poorly bioavailable Cd, and enhanced wet aggregate stability by 5.96%, while Lime and LDHs had no significant effects. Moreover, MSA-CFA significantly increased soil activities of acid phosphatase and peroxidase 4.63- and 2.36-fold, respectively, outperforming Lime and LDHs. Furthermore, compared with the inhibitory effects of Lime, MSA-CFA maintained the richness and diversity of soil microbial communities, accompanied by enhanced abundance of the Cd-immobilizing microorganism Cupriavidus. These findings demonstrate the effects of and mechanisms underlying MSA-CFA soil treatment, highlighting its potential in practical agricultural applications.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129506"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147571445","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":"Process-based insights into differential erosion mechanisms on hiking and mountain biking trails: Evidence from mixed-effects modeling.","authors":"Wei Fang, Sai-Leung Ng","doi":"10.1016/j.jenvman.2026.129572","DOIUrl":"10.1016/j.jenvman.2026.129572","url":null,"abstract":"<p><p>Soil erosion associated with trail-based recreational activities poses persistent ecological and management challenges in protected areas, yet many existing studies remain outcome-focused and provide limited insight into how rainfall translates into surface runoff and sediment export under natural conditions. This study addresses this gap through year-long monitoring of six bounded soil plots installed on co-located mountain biking, hiking, and unmanaged trails in a subtropical country park in Hong Kong. Using linear mixed-effects models, the study examined rainfall-runoff-sediment responses and compared erosion patterns among trail types within a consistent environmental setting. Results showed that both 15-day cumulative rainfall and maximum daily rainfall were significant positive predictors of surface runoff and sediment yield, with maximum daily rainfall providing stronger explanatory power for runoff generation. Rainfall-runoff relationships did not differ significantly among trail types, whereas sediment yield on hiking trails exhibited significantly lower sensitivity to rainfall than on mountain biking trails, indicating higher rainfall amounts for sediment initiation. Empirical onset summaries further illustrated differences in runoff and sediment onset conditions among trail types. By integrating process-oriented field monitoring with a controlled co-located comparative design, this study provides new insights into rainfall-runoff-sediment relationships under natural conditions and offers a robust framework for understanding erosion processes across different trail uses in subtropical protected areas.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129572"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147632123","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":"Microbial community's shifts in an Andean glacier-fed watershed under anthropogenic pressures.","authors":"Eva Mayol, Polette Aguilar-Muñoz, Macarena Pérez, María Soledad Pavlov, Gabriel Rambaldi, Yoanna Eissler, Verónica Molina, Ivan Sola, Claudio A Sáez, Philippe Cuny, Lars-Eric Heimbürger-Boavida, Céline Lavergne","doi":"10.1016/j.jenvman.2026.129386","DOIUrl":"10.1016/j.jenvman.2026.129386","url":null,"abstract":"<p><p>Microorganisms play a crucial role in maintaining ecosystem functions by transforming matter and energy. The impact of environmental perturbations on the cycling and loss of aquatic microbial communities remains poorly characterized, particularly in the Southern Hemisphere. Here, we present the shifts in active microbial community and the maintenance of glacier-derived microbial core along the Aconcagua Basin, Central Chile. Through metabarcoding of the 16S rRNA transcripts and genes in water samples from 13 sites along the river continuum-including glacier-influenced headwaters, mining-proximal zones, agro-industrial reaches, and estuarine environments-distinct shifts in microbial community composition were observed. Glacier-fed waters harbored rich, cold-adapted microbial communities with elevated viral pressure, while mining and/or natural acid drainage promoted the dominance (up to 52% relative abundance) of sulfur-oxidizing bacteria (SOB) and reduced overall diversity. Among the SOB taxa, Thiovirga, Sulfuricurvum, and Thiobacillus-affiliated ASVs dominated together with minor taxa such as Thiomonas, Longilinea, Alishewenella, and Acidithiobacillus. Downstream, runoff and wastewater inputs from agricultural and urban areas altered microbial assemblages, introducing new taxa (e.g., C39 and Cellvibrio) and further diminishing glacier-derived core members. Estuarine sites exhibited pronounced eutrophication and significant loss of upstream microbial diversity. Along the basin, the virus-to-prokaryotes ratio gradually decreased (i.e., 95 to 5) from the glacier-fed lagoon with low prokaryotic biomass to the estuarine wetland with high virus and prokaryotic abundances. This study underscores the importance of integrating microbial diversity into water resource management and conservation policy to ensure ecosystem resilience amid climate change and intensifying human impacts.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129386"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147484144","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":"Beyond intensity: An impact-based drought risk framework for the semi-arid Jequitinhonha River Basin, Brazil.","authors":"Anna Flávia Almeida Perini, Jhones da Silva Amorim, Raíssa Nepomuceno Freitas, Rodrigo Perdigão Gomes Bezerra, Carlos Rogério de Mello, André Ferreira Rodrigues","doi":"10.1016/j.jenvman.2026.129447","DOIUrl":"10.1016/j.jenvman.2026.129447","url":null,"abstract":"<p><p>Drought risk assessments commonly rely on intensity-based indicators, which limits their ability to represent the cumulative and socially mediated nature of drought impacts. This study proposes an impact-based drought risk framework that extends the traditional Drought Risk Index (DRI) by explicitly incorporating drought duration and magnitude in addition to intensity by considering a multi-timescale Standardized Precipitation Index (SPI) calculations with a Social Vulnerability Index. The framework was applied to the Jequitinhonha River Basin, a highly vulnerable semi-arid region in Brazil, and validated using 239 officially issued municipal emergency decrees as proxies for observed drought-related impacts. Multivariate analyses indicate that the first two principal components explain approximately 70% of the variance in the combined impact-risk dataset. Drought duration-based risk, particularly when derived from SPI-12, shows the strongest and most consistent association (rho >0.4) with agricultural, economic, social, and water quality impacts, clearly outperforming intensity-based risk assessments. Spatial analyses further reveal systematically higher drought risk in the middle and lower portions of the basin, where prolonged precipitation deficits coincide with elevated social vulnerability. Overall, the impact-based validation confirms that duration-based drought risk indices, especially at longer accumulation timescales, provide a more reliable representation of drought risk in a highly vulnerable semi-arid context. Consequently, the proposed framework offers an operational and transferable basis for drought risk assessment, supporting more effective prioritization, resource allocation, and design of drought mitigation and adaptation strategies.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129447"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147497220","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":"Enhanced bloom and pollinator diversity from native prairie restoration at a photovoltaic solar park.","authors":"Yudi Li, Leslie Saul-Gershenz, Leroy J Walston, Heidi M Hartmann, Nicholas Tew, Joel D Gardner, Socrates Letana, Rebecca R Hernandez","doi":"10.1016/j.jenvman.2026.129382","DOIUrl":"10.1016/j.jenvman.2026.129382","url":null,"abstract":"<p><p>Large, ground-mounted photovoltaic solar energy projects (GPVs) are increasingly sited on former agricultural lands, creating opportunities to integrate ecological restoration as a scalable, nature-based solution to mitigate insect habitat loss and promote sustainable development. However, empirical evidence for the benefits of such efforts is nascent, particularly in water-limited regions where GPV development is rapidly expanding. We conducted an in-depth study at the UC Davis Experimental Ecovoltaic Park, a 16.3 MW single-axis tracking GPV in the semi-arid Great Central Valley of California over two growing seasons following the sowing of a tailored seed mixture comprising 12 indigenous, pollinator-attractive wildflower species. Our objective was to evaluate how restoring native California prairie to replace poorly-managed, noxious-weed communities can interact with microclimate dynamics imposed by PV modules to influence floral resources and pollinator populations. Native wildflowers on restored plots exhibited 41% and 220% greater floral richness and cover, respectively, resulting in up to six times pollinator diversity than invasive broadleaves on unrestored controls where honey bees dominated visitations. Although perennials Phacelia californica and Grindelia camporum successfully established in the second year, the natural decline of annuals, particularly sunflower Helianthus bolanderi favored by many specialist bees, was associated with a 33% decrease of overall pollinator diversity. While panel-induced shading reduced flower unit densities while enlarging display areas of several native wildflowers, it did not significantly alter pollinator community composition. The findings demonstrate that ecological restoration at GPVs can potentially reconcile renewable energy production with biodiversity conservation in harsh, weed-prone environments.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129382"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147497278","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":"Synergistic optimization of water-energy-environment nexus under uncertainty: An interval type-2 fuzzy chance-constrained programming model in a coastal mountainous basin, China.","authors":"Zhiyi Peng, Lei Jin, Yurui Fan, Li Wang, Jing Liu","doi":"10.1016/j.jenvman.2026.129261","DOIUrl":"10.1016/j.jenvman.2026.129261","url":null,"abstract":"<p><p>Intensifying socio-economic development and climate variability in coastal mountainous basins have increased water withdrawals, energy demand, and pollutant discharges, amplifying pressures on the water-energy-environment (WEE) nexus. There is an urgent need for integrated approaches capable of addressing coupled interactions and multi-source uncertainties. This study develops a chance-constrained bi-objective interval fractional programming model to maximize net economic benefits and pollutant-load efficiency. The framework characterizes multi-source uncertainties and coupled interactions within the WEE nexus using interval type-2 trapezoidal fuzzy sets and is applied to the Minjiang River Basin. Compared with conventional nexus models, this structure enhances decision robustness across confidence levels and scenarios. Furthermore, a hybrid multi-criteria decision-making approach combining Fuzzy Analytic Hierarchy Process and Technique for Order Preference by Similarity to Ideal Solution is employed for solution prioritization. Results show that industrial and domestic sectors jointly account for over 75% of total demand, whereas agricultural and ecological sectors act as principal adjustment levers during dry seasons. Spatially, allocation is strategically divergent, directing 62% of water to downstream economic zones and 35% to ecologically preserved upstream areas. Expanding seawater desalination alleviates scarcity but involves energy and discharge trade-offs, requiring coordination with reclaimed-water reuse and demand management. Chemical oxygen demand and total phosphorus emerge as binding pollutants, and the preferred scheme achieves a 15.8% reduction in discharge at a 6.8% economic cost. This study presents a scientific framework for systematic optimization and risk-informed management of the WEE nexus and provides theoretical support for future nexus-oriented policymaking in coastal mountainous basins.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129261"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147493315","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":"Harvesting reshapes greenhouse gas exchange in reservoir drawdown soils via soil state control and context-dependent microbial functions.","authors":"Xingchen Liu, Xiaobo Liu, Dayu Zhu, Jinhui Wang, Zhuowei Wang, Weiqiao Liu, Xuan Zhou, Huaidong Zhou, Leixiang Wu","doi":"10.1016/j.jenvman.2026.129375","DOIUrl":"10.1016/j.jenvman.2026.129375","url":null,"abstract":"<p><p>Reservoir drawdown zones, the seasonally exposed and re-flooded margins of reservoirs, are extensive pulsed wetlands that can act as hotspots of greenhouse gas (GHG) exchange. Vegetation harvesting is common in these zones, yet its net climate effect across CO₂, CH₄, and N₂O, and the controls behind it, remain unclear. We compared harvested and unharvested plots across longitudinal river reaches and elevation bands in the drawdown zone of the Three Gorges Reservoir (China). We measured soil-atmosphere fluxes of CO₂, CH₄, and N₂O, together with soil physicochemical properties and metagenome-derived functional markers. Harvesting increased CO₂ flux and decreased CH₄ flux, while N₂O showed no detectable net treatment effect. Across analyses, soil hydrothermal and nutrient conditions were the dominant predictors of flux variation; microbial functional signals added information mainly through soil-dependent interactions. In CO₂-equivalent terms, lower CH₄ emissions only partly compensated for higher CO₂, leaving a net positive effect under both 20- and 100-year horizons. These results underscore that harvest impacts in drawdown soils should be assessed as multi-gas trade-offs and interpreted through soil moisture-redox dynamics.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"404 ","pages":"129375"},"PeriodicalIF":8.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147493215","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}