Journal of environmental quality最新文献

{"title":"Optimizing sampling across transect-based methods improves the power of agroecological monitoring data","authors":"Sarah E. McCord,&nbsp;Nicholas P. Webb,&nbsp;Justin W. Van Zee,&nbsp;Ericha M. Courtright,&nbsp;Ben Billings,&nbsp;Michael C. Duniway,&nbsp;Brandon L. Edwards,&nbsp;Emily Kachergis,&nbsp;Daniel Moriasi,&nbsp;Brian Morra,&nbsp;Aleta Nafus,&nbsp;Beth A. Newingham,&nbsp;Drew A. Scott,&nbsp;David Toledo","doi":"10.1002/jeq2.20678","DOIUrl":"10.1002/jeq2.20678","url":null,"abstract":"<p>Transect-based monitoring has long been a valuable tool in ecosystem monitoring to measure multiple ecosystem attributes. The line-point intercept (LPI), vegetation height, and canopy gap intercept methods comprise a set of core methods, which provide indicators of ecosystem condition. However, users often struggle to design a sampling strategy that optimizes the ability to detect ecological change using transect-based methods. We assessed the sensitivity of each of these core methods to transect length, number, and sampling interval in 1-ha plots to determine: (1) minimum sampling required to describe ecosystem characteristics and detect change; and (2) optimal transect length and number to make recommendations for future analyses and monitoring efforts. We used data from 13 National Wind Erosion Research Network locations, including five LTAR sites, spanning the western United States, which included 151 plot sampling events over time across five biomes. We found that longer and increased replicates of transects were more important for reducing sampling error than increased sample intensity along fewer transects per plot. For all methods and indicators across biomes plots, three 100-m transects reduced sampling error such that indicator estimates fell within a 95% confidence interval of ±5% for canopy gap intercept and LPI-total foliar cover, ±5 cm for height, and ±2 species for LPI-species counts. For the same criteria at 80% confidence intervals, two 100-m transects are needed. Site-scale inference was strongly affected by sample design, consequently our understanding of ecological dynamics may be influenced by sampling decisions.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"706-719"},"PeriodicalIF":2.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.20678","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143649134","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":"Dynamic prediction and quantitative assessment of carbon emissions from animal husbandry: A case study of inner mongolia autonomous region, China","authors":"Jikang Luo,&nbsp;Zhen Zhao,&nbsp;Jing Pang","doi":"10.1002/jeq2.70009","DOIUrl":"10.1002/jeq2.70009","url":null,"abstract":"<p>Climate change, driven by greenhouse gas emissions, has emerged as a pressing global ecological and environmental challenge. Our study is dedicated to exploring the various factors influencing greenhouse gas emissions from animal husbandry and predicting their future trends. To this end, we have analyzed data from China's Inner Mongolia Autonomous Region spanning from 1978 to 2022, aiming to estimate the carbon emissions associated with animal husbandry in the region. Furthermore, we have constructed an SA-STIRPAT model grounded in scenario analysis to forecast the timing of the carbon emissions peak. Our findings reveal several notable trends. From 2001 to 2022, carbon emissions from animal husbandry in the region followed a pattern of “rapid growth, followed by smooth fluctuations, and then a gradual recovery.” Notably, in 2019, the region reached a peak contribution to China's animal husbandry carbon emissions, accounting for 8.34% of the national total. Ruminants, including cattle, sheep, and camels, were identified as the primary emitters, responsible for 91.6% of the total greenhouse gas emissions. Additionally, our study indicates that factors such as production efficiency, industrial structure, economic level, and population structure positively impact carbon emissions, while population size negatively affects animal husbandry's carbon footprint. Our model predicts that under both low-carbon and benchmark scenarios, carbon emissions from animal husbandry in the region are expected to decline after 2030. However, under a high-carbon scenario, emissions are anticipated to peak in 2040. In conclusion, to achieve Inner Mongolia's “dual carbon” goals, it is imperative to implement effective population control measures, enhance production efficiency, elevate the level of urbanization, and optimize the industrial structure.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 5","pages":"991-1002"},"PeriodicalIF":2.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143615749","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":"Iowa learning farms: Utilizing research to develop and deliver extension outreach programs across multiple constituencies","authors":"Mark A. Licht,&nbsp;Jacqueline Comito,&nbsp;Matthew J. Helmers,&nbsp;Elizabeth Ripley,&nbsp;Ann Staudt","doi":"10.1002/jeq2.70008","DOIUrl":"10.1002/jeq2.70008","url":null,"abstract":"<p>Iowa Learning Farms, based at Iowa State University since 2004, is a nationally recognized conservation outreach program that has successfully engaged with farmers and landowners to deliver information and provide tools and guidance encouraging the implementation of agricultural practices that enhance water quality, improve soil health and productivity, and contribute to building a Culture of Conservation in Iowa and beyond. Iowa Learning Farms programs all focus directly on reaching and engaging with farmers. The program's success comes from the processes employed to create, test, and deliver programs that serve demographic groups including traditional row crop, new or next-generation, female, nontraditional crop, and livestock farmers, as well as tenants, landowners, and conservation professionals. Our programs include field days, webinars, Conservation Station trailers, rapid needs assessment and response workshops, Leadership Circle listening sessions, a youth education program, infographic-style factsheets, and a Whole Farm Conservation Best Practices Manual, as well as a newsletter, blog, and social media presence. Our programs foster a collaborative relationship with farmer partners, agencies, the university, researchers, and the public. The development, feedback, and iterative process of creating and refining programmatic elements will be highlighted.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"747-761"},"PeriodicalIF":2.3,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.70008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143572834","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":"Effects of biogenic and commercially available iron-oxide nanoparticles on algal and bacterial growth in freshwater and marine water","authors":"Natasha Yadav,&nbsp;Luis O. B. Afonso,&nbsp;Aaron G. Schultz,&nbsp;Himadri Bihari Bohidar,&nbsp;Pushplata Prasad Singh","doi":"10.1002/jeq2.70005","DOIUrl":"10.1002/jeq2.70005","url":null,"abstract":"<p>We investigated the potential toxic effects of iron oxide magnetic nanoparticles (IOMNPs) of varied size, synthesized through biological and chemical methods on freshwater and marine microalgae and bacterial species. The study provides insights into pollution and ecological impacts of NPs. IOMNPs of two sizes, 20–50 nm (quasi-spherical) synthesized using a cell-free fungal extract (biogenic method), and 104 nm (spherical) obtained from a commercial source (chemical method), were tested for aggregation, bioavailability, and toxicity at multiple concentrations (12.5, 25, 50, 100, and 125 µg mL⁻¹). Microalgal growth media (Bold's basal media and sea salt media [SSM]) was used for aggregation analysis of IOMNPs using dynamic light scattering (DLS) technique. DLS analysis showed similar aggregation patterns for both type of IOMNPs, with relatively larger aggregate formation in SSM. Toxicity assessments showed that biogenic IOMNPs of smaller size 20–50 nm were non-toxic, while commercial IOMNPs of large size (104 nm) significantly reduced bacterial cell density and microalgal lipid and carotenoid content at higher concentrations. Further, transmission electron microscopy and X-ray fluorescence analysis confirmed IOMNP uptake by microalgae. TEM images showed more pronounced structural damage caused by the uptake of commercial IOMNPs. Our findings provide crucial insights into the differential impacts of IOMNPs based on their size and synthesis methods on key aquatic microorganisms and their potential to mitigate issues related to NP pollution.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"563-575"},"PeriodicalIF":2.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143541811","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":"Impacts of campaign-based community watershed management on selected soil quality indicators","authors":"Hailu Kendie Addis,&nbsp;Simegnew Tamir,&nbsp;Shigdaf Mekuriaw,&nbsp;Beyene Belay,&nbsp;Tadesse Birehanu,&nbsp;Yismaw Wuletaw,&nbsp;Gedefaw Beyene,&nbsp;Melkamu Ayalew,&nbsp;Tilaye Teklewold,&nbsp;Almaz Giziew","doi":"10.1002/jeq2.70006","DOIUrl":"10.1002/jeq2.70006","url":null,"abstract":"<p>In the highlands of Ethiopia, integrated community watershed management has drawn a lot of interest as a solution to low production and soil degradation. However, the documentation of its role in managing soil fertility and health under diverse landscape perspectives remains inadequate. The main objective of this study was to link the effects of landscape positions and soil management practices (conservation agriculture (CA) and non-CA) on selected soil properties. Disturbed and undisturbed soil samples were collected at a depth of 0–20 cm from 192 locations (16 different watersheds) to analyze texture, bulk density (<i>ρ</i>d), pH, soil organic carbon (SOC), total nitrogen (TN), and available phosphorus (Av.P). The study used analysis of variance (ANOVA), Pearson correlation, and principal component analysis to examine the relationship between factors, identify patterns, and understand data variability. The findings indicated that the landscape position significantly affects the values of ρd, sand and clay, SOC, Av.P, and TN at <i>p</i> &lt; 0.05. The sand, clay, ρd, SOC, Av.P, and TN showed statistically significant variations between CA and non-CA. The interaction effects of landscape positions and watershed management status (well and poor) were highly significant for the selected soil properties except for the silt and pH. The results also demonstrated a substantial correlation between the observed soil properties. Meanwhile, the principal components 1–3 collectively described 64.45% of the total variability. Therefore, it is possible to infer that successful watershed management intervention improves topsoil properties, which urges the maintenance and development of soil and water conservation, CA, and vermicomposting practices.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"605-620"},"PeriodicalIF":2.3,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143483340","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 conceptual model for dissolved P mobilization from legacy sources","authors":"D. M. Nash,&nbsp;R. W. Mc Dowell,&nbsp;P. J. A. Kleinman,&nbsp;P. A. Moore Jr.,&nbsp;J. M. Duncan,&nbsp;P. M. Haygarth,&nbsp;D. R. Smith,&nbsp;A. Iho","doi":"10.1002/jeq2.70003","DOIUrl":"10.1002/jeq2.70003","url":null,"abstract":"<p>Excessive phosphorus (P) concentrations can lead to conditions that limit the amenity of freshwater resources. This problem is particularly acute in agricultural catchments, where P fertilizer and manure amendments have been used to increase soil fertility and productivity. In these catchments, P indices are often used to help target critical source areas in order to reduce P exports. However, the overall impact of agricultural mitigation efforts on receiving waters has not always been consistent with declines in total P exports from catchments. In this paper we propose a model of dissolved P mobilization (i.e., entrainment) in surface runoff that accounts for this outcome and examine modifications to P indices that better accommodate dissolved P mobilization. We suggest that dissolved P mobilization commences near the soil surface and has two phases. When water is first applied, labile P is mostly mobilized by dissolution and advection. Subsequently, as the supply of readily accessible P is exhausted, diffusion and hydrodynamic dispersion mobilize P from other sources at a near constant rate for the remainder of the event. As most P exports occur in larger (i.e., longer) events, the second phase appears responsible for most dissolved P exports. Such a model of dissolved P mobilization is consistent with runoff monitoring data under natural and simulated rainfall, suggesting that on low (shallow) slopes where the interaction between surface soil and water may be prolonged, dissolved P concentrations are likely to be higher. Dissolved P mobilization from low-slope areas is not well represented in P indices at present. We suggest that there needs to be a more complex, mechanistic structure to P indices that involves additional compartmentalization. Further, we suggest that this can be achieved without losing the simplicity of P indices or flexibility to integrate research data and experiential knowledge into tools that are relevant to specific regions.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 2","pages":"303-318"},"PeriodicalIF":2.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143457562","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":"Methane emission reduction by adding sulfate to liquid dairy manure","authors":"Filipe Matos Pereira Lima,&nbsp;Mélodie Laniel,&nbsp;Hambaliou Balde,&nbsp;Robert Gordon,&nbsp;Andrew VanderZaag","doi":"10.1002/jeq2.70002","DOIUrl":"10.1002/jeq2.70002","url":null,"abstract":"<p>Dairy farmers are interested in reducing the carbon footprint of milk. Reducing methane (CH₄) emissions is a key part of this goal, and manure is a significant CH₄ source. Technologies like anaerobic digesters for biogas production are effective; however, adoption rates are slowed by upfront costs and infrastructure needs. Achieving near-term emission reductions needs low-cost alternatives that can be quickly and widely adopted. Previous studies have shown that “acidification” of manure by adding sulfuric acid (H₂SO₄) suppressed CH₄ emissions; however, widespread adoption may be hindered by the challenge of handling acid on farms. This laboratory study was performed for 157 days at 24°C, and compared the efficacy of a sulfate-based non-acidic fertilizer (CaSO₄), and two rates of acidification, one at pH &gt; 7 and one at pH &lt; 7, for a sulfate-based acid (H₂SO₄) and a sulfate-free acid (H₃PO₄). Methane suppression by CaSO₄ at multiple rates was also analyzed. Two mechanisms of suppression were observed: acidification had a demonstrable early effect, lowering cumulative CH₄ emission within 40 days by up to 65% for H₂SO₄ and 54% for H₃PO₄, while sulfate-containing compounds showed increasing suppression after 50 days. Final cumulative CH₄ suppression was up to 63% for CaSO₄ and 91% for H₂SO₄, while H₃PO₄ was least effective. These results suggest H₂SO₄ is highly effective due to the combination of acidity and sulfate. Adding sulfate alone (CaSO₄) was more effective than adding acid alone (H₃PO₄). Hence, sulfate-based additives—like gypsum—may hold promise as an alternative near-term solution for dairy farms to make large CH₄ reductions.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 2","pages":"349-358"},"PeriodicalIF":2.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143433267","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":"Phosphorus budgets of intensively managed row crops at a long-term agroecosystem research site in the upper US Midwest","authors":"Mir Zaman Hussain,&nbsp;Stephen K. Hamilton,&nbsp;Bruno Basso,&nbsp;G. Philip Robertson","doi":"10.1002/jeq2.70000","DOIUrl":"10.1002/jeq2.70000","url":null,"abstract":"<p>Phosphorus (P) budgets for cropping systems provide insights for keeping soil P at optimal levels for crops while avoiding excess inputs. We quantified 12 years of P inputs (fertilizer and atmospheric deposition) and outputs (harvest and leaching losses) for replicated maize (<i>Zea mays</i> L.)—soybean (<i>Glycine max</i> L.)—wheat (<i>Triticum aestivum</i>) crop rotations under conventional, no-till, reduced input, and biologically based (organic without compost or manure) management systems at the Kellogg Biological Station LTAR site in southwest Michigan. Conventional, no-till, and reduced input systems were fertilized between 13 and 50 kg P ha⁻¹ depending on year. Soil test phosphorus (STP) was measured at 0- to 25-cm depth every autumn. Leached P was measured as dissolved P in the soil solution sampled beneath the rooting depth and combined with modeled percolation. Fertilization and harvest were the predominant P fluxes in the fertilized systems, whereas only harvest dominated P flux in the unfertilized organic system. Leaching losses were minor terms in the budgets, but leachate concentrations were nevertheless close to the range of concern for downstream eutrophication. Over the 12-year study period, the organic system exhibited a negative P balance (−82.0 kg P ha⁻¹), coinciding with suboptimal STP levels, suggesting a need for P supplementation. In contrast, the fertilized systems showed positive P balances (mean: 70.1 kg P ha⁻¹) with STP levels well above agronomic optima. Results underscore the importance of tailored P management strategies to sustain crop productivity while mitigating environmental impacts.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"720-731"},"PeriodicalIF":2.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408487","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":"Stream pathogenic bacteria levels rebound post-population control of wild pigs","authors":"Elizabeth A. Bradley,&nbsp;B. G. Lockaby,&nbsp;Steven Madere,&nbsp;Sara Bolds,&nbsp;Latif Kalin,&nbsp;Stephen S. Ditchkoff,&nbsp;Vienna R. Brown","doi":"10.1002/jeq2.70004","DOIUrl":"10.1002/jeq2.70004","url":null,"abstract":"<p>The range and density of one of North America's most destructive and invasive mammalian species, wild pigs (<i>Sus scrofa</i>), has expanded rapidly over the past several decades. Alongside this growth, their fecal contamination of surface waters has impaired water quality through significantly increased levels of pathogenic bacteria, raising concerns over the potential for zoonotic disease transmission. Significant remediation of these water quality impacts has been shown as a result of reductions in wild pig populations due to control efforts; however, the duration of these remediation effects as populations rebound remains unclear. Our study sought to determine the longevity of water quality remediation resulting from wild pig population control efforts. We found that median concentrations of <i>Escherichia coli</i> and fecal coliform (CFU/100 mL) increased by 746% and 159% in the year following the conclusion of removal efforts, resulting in median concentrations of 79% and 159% greater than those observed prior. We also found increased public health risk, with samples exceeding <i>E. coli</i> and fecal coliform guidelines 10% and 12% more often than pre-removal, respectively. While further research into wild pig population dynamics and fecal contamination is necessary, we conclude that ongoing population control efforts may be necessary to remediate water quality impacts and public health risks associated with invasive wild pigs.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 2","pages":"359-368"},"PeriodicalIF":2.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143390974","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":"Changes in riverine dissolved organic matter caused by gypsum-induced flocculation","authors":"Samu Elovaara,&nbsp;Lingbin Zhao,&nbsp;Eero Asmala,&nbsp;Hermanni Kaartokallio,&nbsp;David N. Thomas","doi":"10.1002/jeq2.70001","DOIUrl":"10.1002/jeq2.70001","url":null,"abstract":"<p>Gypsum (CaSO₄·2H₂O) is increasingly used to bind P to soil on agricultural fields, which mitigates eutrophication caused by runoff of excess PO₄³⁻ fertilizers into adjacent aquatic environments. Gypsum also binds dissolved organic matter (DOM) to soil particles. Gypsum that gets into fresh water after field applications may result in enhanced particle formation by DOM flocculation and alter C transfer in rivers draining agricultural catchments. We tested the potential effects of gypsum additions on DOM cycling by adding concentrated gypsum solution into river water before subjecting it to controlled mixing to increase particle collisions and flocculation. Gypsum addition increased the amount of suspended particulate matter in river water three to four times higher than in controls without gypsum. The flocs contained a relatively high amount of minerogenic particles. Gypsum-induced flocculation removed colored dissolved organic matter which, together with removal of minerogenic particles, may result in increased water clarity. Gypsum addition and the associated changes in the DOM pool did not affect microbial growth or DOM processing, suggesting that flocculation did not target the labile fraction of the DOM pool. While acknowledging that the responses detected in our study might depend on the region, we propose that the changes in riverine DOM cycling caused by gypsum application results in either no changes or slightly positive changes to the water quality of the rivers and should not be considered an obstacle for eutrophication prevention using gypsum applications.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 2","pages":"369-381"},"PeriodicalIF":2.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143390789","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}