Environmental Monitoring and Assessment最新文献_第10页

Bridging the sanitation gap: Progress and inequality in Arab countries of the MENA region 弥合卫生差距：中东和北非地区阿拉伯国家的进步和不平等

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-26 DOI: 10.1007/s10661-025-14045-y

Kaycie Lane, Johana Tanous, Shannon Bartelt-Hunt, May A. Massoud

{"title":"Bridging the sanitation gap: Progress and inequality in Arab countries of the MENA region","authors":"Kaycie Lane, Johana Tanous, Shannon Bartelt-Hunt, May A. Massoud","doi":"10.1007/s10661-025-14045-y","DOIUrl":"10.1007/s10661-025-14045-y","url":null,"abstract":"<div><p>Countries in the Middle East and North Africa (MENA) region face water scarcity concerns and challenges to treating wastewater and providing sustainable and equitable sanitation services to the over 500 million people living in 17 identified countries. This study evaluates trends in sanitation access, the percentage of wastewater treated versus collected, equity in service access across wealth quintiles, and the sustainability of services using per capita wastewater production data. The findings reveal that while there have been improvements in access to safely managed sanitation services from 2000 to 2022, the current rate of progress is insufficient to meet Sustainable Development Goal (SDG) 6.2 by 2030 in 13 countries. Notably, although wastewater is often safely collected, less than 50% is safely treated in seven of the eleven countries with available data. The study highlights significant disparities in sanitation access, with wealthier populations having better access to basic services, while poorer communities experience higher rates of open defecation. Additionally, the projected increase in wastewater production due to population growth and the push for universal access to safely managed services will require substantial improvements in treatment capacity. These insights are crucial for policymakers, underscoring the need for resilient infrastructure to achieve SDG 6.2 by 2030 while addressing ongoing equity and sustainability challenges in the region.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875386","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}

引用次数: 0

Diel variation of hydrochemistry in streams in protected areas in northeastern Brazil 巴西东北部保护区河流水化学的昼夜变化

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-25 DOI: 10.1007/s10661-025-14026-1

Pierre Martín Márquez Malarín, Jéssica Carneiro de Souza, Daniela Mariano Lopes da Silva

{"title":"Diel variation of hydrochemistry in streams in protected areas in northeastern Brazil","authors":"Pierre Martín Márquez Malarín, Jéssica Carneiro de Souza, Daniela Mariano Lopes da Silva","doi":"10.1007/s10661-025-14026-1","DOIUrl":"10.1007/s10661-025-14026-1","url":null,"abstract":"<div><p>This research investigates the diel variations in nutrient concentrations in preserved streams located in the Cerrado and Atlantic Forest biomes of Bahia, Brazil. By examining both organic and inorganic forms of nitrogen and phosphorus, the study aims to understand how these nutrients fluctuate in response to environmental factors such as precipitation and landscape features. This study contributes to a deeper understanding of nutrient cycling in tropical stream ecosystems, providing insights that could aid in conservation strategies. Water samples were collected every hour using an automatic sampler over a 24-h period, covering both dry and rainy seasons to reflect seasonal variability. The abiotic variables pH, DO, conductivity, and temperature were measured during sampling, and subsequent nutrient analyses were conducted (including nitrate, nitrite, ammonium, and both dissolved and particulate organic nitrogen and phosphorus) along with Chlorophyll-a. This system-wide analysis provides a more comprehensive understanding, enabling us to effectively link nutrient dynamics with environmental conditions. Results indicate that abiotic variables were the only parameters showing diel variation, with higher values during the daytime. A comparison of parameters between Cerrado (M1) and Atlantic Forest (M2) revealed that almost all values were higher in the Atlantic Forest during the rainy season. Our findings suggest that vegetation cover, soil characteristics, and biogeochemical processes in soil and water were more influential in the variations between areas than diel fluctuations.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871338","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}

引用次数: 0

Capture efficiency of sampling methods and their effects on the dung beetle (Coleoptera: Scarabaeinae) community in an urban remnant of Amazonian forest 亚马孙城市森林残余物取样方法捕获效率及其对金龟甲群落的影响

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-25 DOI: 10.1007/s10661-025-14029-y

Lucas de Abreu, Erlane José Cunha, Felix Gomes da Costa, Luiza de Araújo Romeiro, Ana Beatriz Gomes Moura, Everton Evaristo Nazaré-Silva, Fernando Augusto Barbosa Silva

{"title":"Capture efficiency of sampling methods and their effects on the dung beetle (Coleoptera: Scarabaeinae) community in an urban remnant of Amazonian forest","authors":"Lucas de Abreu, Erlane José Cunha, Felix Gomes da Costa, Luiza de Araújo Romeiro, Ana Beatriz Gomes Moura, Everton Evaristo Nazaré-Silva, Fernando Augusto Barbosa Silva","doi":"10.1007/s10661-025-14029-y","DOIUrl":"10.1007/s10661-025-14029-y","url":null,"abstract":"<div><p>Traps are widely used to collect insects in tropical ecosystems, but the choice of sampling methods has a direct influence on community patterns. Our study aimed to evaluate the efficiency of two methods (pitfall and flight interception trap, FIT) for dung beetle sampling (Coleoptera: Scarabaeinae) in an urban forest area in the Amazon. The traps were installed in four locations and sampled in the hydrological periods of drought and rain in the Utinga State Park, an urban Amazonian protected area. A total of 2192 beetles were captured, distributed in 28 species; 26 species (676 individuals) were recorded in flight interception traps and 20 species (1516 individuals) in pitfall traps. The most abundant species were <i>Canthidium deyrollei</i> (<i>N</i> = 1658), <i>Dichotomius lucasi</i> (<i>N</i> = 199), <i>Dichotomius boreus</i> (<i>N</i> = 147), and <i>Canthon subhyalinus</i> (<i>N</i> = 85). Although fewer individuals were captured in FITs, they recorded more species than pitfall traps. Additionally, FITs exhibited greater efficiency with a sampling effort of 8.2 human hours compared to pitfall traps. Furthermore, the composition was different between the two types of traps. Our results indicate that the selection of collection methodology can be driven by the ecological questions regarding biodiversity in accordance with the study objectives. However, we highlight that better ecological sampling would be done using both methods combined to capture complementary ecosystem functions promoted by dung beetles. Our study highlights that dung beetle collection methodologies are crucial factors to be considered in tropical forest monitoring and conservation projects, especially in urbanized areas.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871316","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}

引用次数: 0

Identification of foam susceptible locations in the Delhi Reach of the Yamuna River 亚穆纳河德里河段泡沫易感地点的鉴定

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-25 DOI: 10.1007/s10661-025-14024-3

Neenu, Mitthan Lal Kansal

{"title":"Identification of foam susceptible locations in the Delhi Reach of the Yamuna River","authors":"Neenu, Mitthan Lal Kansal","doi":"10.1007/s10661-025-14024-3","DOIUrl":"10.1007/s10661-025-14024-3","url":null,"abstract":"<div><p>Recently, the occurrence of foam formation across many rivers has been a cause of concern for the global scientific community. The primary reasons behind foam formation include anionic surfactants, nutrients, organic and inorganic substances, and pathogens, which have been widely studied in the past. However, the issue of foam formation on water surfaces and identifying foam-susceptible locations has not been addressed comprehensively in the past literature. To address this, the present study, for the first time in river management literature, proposes a unified framework to investigate the foam formation issue and identify foam-susceptible locations over Delhi’s reach of the Yamuna River, a stretch known for witnessing extensive pollution and excessive foam formation. The foam-related parameters were initially identified, and efficiency scores for four locations—Wazirabad Barrage (u/s), ITO Bridge, Nizamuddin Bridge, and Okhla Barrage (d/s)—were evaluated using the data envelopment analysis model. It was observed that three locations demonstrated low-efficiency scores in comparison to Wazirabad (u/s), indicating a high susceptibility to foam formation, which is critical from an environmental perspective, characterized by elevated levels of nutrients, surfactants, and organic pollutants. The reduced freshwater availability, lack of dissolved oxygen, discharge of untreated or partially treated effluents from multiple drains, and high concentrations of surfactants were noticed, which necessitate focused interventions in this area. In response, the study recommends remedial measures, including ensuring adequate environmental flow, pollutant oxidation, phytoremediation, stringent regulations, and public awareness to address foam formation issues in the Yamuna River.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875372","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}

引用次数: 0

Study on landscape pattern changes and their correlation with ecosystem services in intensely human-disrupted basins: evidence from China’s Maotiao River 人为干扰强烈流域景观格局变化及其与生态系统服务的相关性研究——来自中国茂条河的证据

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-25 DOI: 10.1007/s10661-025-14036-z

Huiqing Han, Yingjia Zhang, Yuanju Jian, Huanqin Chen

{"title":"Study on landscape pattern changes and their correlation with ecosystem services in intensely human-disrupted basins: evidence from China’s Maotiao River","authors":"Huiqing Han, Yingjia Zhang, Yuanju Jian, Huanqin Chen","doi":"10.1007/s10661-025-14036-z","DOIUrl":"10.1007/s10661-025-14036-z","url":null,"abstract":"<div><p>Over the past few decades, human activities have increasingly disrupted landscape pattern (LP) in river basins, severely impacting the ecosystem services (ESs) within these regions. This study focuses on the Maotiao River, located in southwestern China, to explore changes in LP under intense human disturbance and their correlation with ESs. Using a combination of landscape indices and ESs evaluation methods, the study reveals the characteristics of LP changes from 1990 to 2020 and examines their effects on key ESs. The results indicate significant changes in the area and spatial distribution of farmland and forestland, with notable differences across riparian gradient zones. Overall, soil retention, carbon stock, and habitat quality have declined, while water yield and food production have increased. The findings also demonstrate trade-offs or synergies between ESs. The percentage of landscape, patch density, mean shape index, and aggregation index show strong correlations with ESs. By analyzing the relationship between landscape indices and ESs, this study identifies the most influential landscape indicators and highlights their changing trends under human disturbance. The results suggest that human activities have led to increased landscape fragmentation and spatial heterogeneity, posing a serious threat to the provision of ESs in the basin. This study provides theoretical support for watershed ecological protection and landscape optimization, contributing to the development of more effective strategies for enhancing ESs and promoting sustainable development.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875302","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}

引用次数: 0

Spatial radionuclide distribution, mineralogy, and radiological evaluation of the Jeddah shoreline sediments, Red Sea, Saudi Arabia 沙特阿拉伯红海吉达海岸线沉积物的空间放射性核素分布、矿物学和放射学评价

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-25 DOI: 10.1007/s10661-025-13986-8

Bandar A. Al-Mur, Mohammed H. Aljahdali, Talal Almeelbi, El Saeed R. Lasheen

{"title":"Spatial radionuclide distribution, mineralogy, and radiological evaluation of the Jeddah shoreline sediments, Red Sea, Saudi Arabia","authors":"Bandar A. Al-Mur, Mohammed H. Aljahdali, Talal Almeelbi, El Saeed R. Lasheen","doi":"10.1007/s10661-025-13986-8","DOIUrl":"10.1007/s10661-025-13986-8","url":null,"abstract":"<div><p>Despite hazards of pollution and radiation, the Red Sea is essential for industries involved in tourism and energy development. This research aims to assess the levels of radiation in samples taken from the Jeddah district of the Red Sea, Saudi Arabia, along the north, center, and southern portions of the Jeddah shoreline. The mean quantities of <sup>232</sup>Th, <sup>40</sup> K, and <sup>226</sup>Ra in shoreline sediments are 5.05 ± 2, 139.09 ± 74.08, and 13.14 ± 3.95 Bq/kg, respectively, according to results from NaI detectors. These amounts fall within the widely recognized international reporting requirements. Among the three portions of Jeddah coastline, the northern sector has the highest obtained activity concentrations of <sup>40</sup> K (av. 242.05 Bq/kg), <sup>232</sup>Th (av. 6.06 Bq/kg), <sup>226</sup>Ra (av. 17.24 Bq/kg), and their summation (av. 265.36 Bq/kg) relative to the central and southern sectors. The average worldwide concentration of 420 Bq/kg for the Jeddah coastline samples under examination is higher than the average of 157.528 ± 77.11 Bq/kg for <sup>40</sup> K + <sup>232</sup>Th + <sup>226</sup>Ra, which was between 41.07 and 346.42 Bq/kg. Numerous radiological factors, such as excess life-time cancer, absorbed dose rate and annualized dosage, radium equivalent, exposure to human organs, and various other parameters (e.g. H<sub>α</sub>, H<sub>ex</sub>, H<sub>γ</sub>, and H<sub>in</sub>), were established for these sediments in relation to these activities. These metrics’ values are below the average value for the world, indicating that the natural gamma radiation that is released has a negligible effect. The primary segregated heavy minerals are hematite, zircon, and pyrite.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875306","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}

引用次数: 0

Metal concentration in ghost shrimp and contamination levels of sandy beaches contrasted with anthropogenic impacts in Southeast Brazil 巴西东南部鬼虾中的金属浓度和沙滩污染水平与人为影响的对比

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-25 DOI: 10.1007/s10661-025-14033-2

Juliano José-Silva, Tailisi H. Trevizani, Alaor A. Almeida, Marcelo A. A. Pinheiro

{"title":"Metal concentration in ghost shrimp and contamination levels of sandy beaches contrasted with anthropogenic impacts in Southeast Brazil","authors":"Juliano José-Silva, Tailisi H. Trevizani, Alaor A. Almeida, Marcelo A. A. Pinheiro","doi":"10.1007/s10661-025-14033-2","DOIUrl":"10.1007/s10661-025-14033-2","url":null,"abstract":"<div><p>This study evaluates the contrast in the concentration of seven potentially toxic elements (As, Cd, Cr, Cu, Hg, Mn, and Pb) in tissues (G, gonads; H, hepatopancreas; and M, muscle) of the ghost shrimp <i>Callichirus corruptus</i>, as a response to sediment contamination in two sandy beaches in Southern Brazil with different anthropogenic status (JUR, Juréia; and STS, Santos). The biotic and abiotic samples were collected with a suction pump and subjected to metal quantification by atomic absorption spectrophotometry technique. In JUR, the sediment had Cr, Cu, and Mn concentrations two times lower when compared to STS (<i>t</i> ≤ 7.80; <i>p</i> ≤ 0.01), while STS had Hg concentrations between the Interim Sediment Quality Guideline (ISQG) and probable effect level (PEL) parameters. Three metals (Cd, Cr, and Cu) presented concentrations above the maximum tolerated limit indicated by the Brazilian Health Regulatory Agency (Anvisa), with prawn bioaccumulation up to eight times greater in STS than JUR (<i>t</i> ≥ 4.42; <i>p</i> ≤ 0.03). Therefore, this study confirms higher metal concentrations (μg/g) in the biotic (Cd = 7.86 Cr = 11.95 and Mn = 19.38) and abiotic (Cd = 0.45, Cr = 3.13, Cu = 0.59, Hg = 0.49 and Mn = 45.61) compartments of Santos, which has a high human population density and a significant industrial and port complex, in contrast to Juréia, which is located in a highly conservation ecological station. Furthermore, the research presents novel information on trace elements in the sandy sediments of the studied sites. Additionally, it provides unprecedented evidence on metal concentration for <i>C. corruptus</i>, which can be used in monitoring programs for sandy beaches due to its metal bioaccumulation potential.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875307","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}

引用次数: 0

A review on the role of duckweed (Lemna spp.) in the rejuvenation of aquatic bodies by pollutant remediation and recovery of valuable resources 浮萍（Lemna spp.）在水体修复和宝贵资源恢复中的作用综述

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-25 DOI: 10.1007/s10661-025-14041-2

Madhumita Goala, Archana Bachheti, Ashish Kumar Arya, Vinod Kumar

{"title":"A review on the role of duckweed (Lemna spp.) in the rejuvenation of aquatic bodies by pollutant remediation and recovery of valuable resources","authors":"Madhumita Goala, Archana Bachheti, Ashish Kumar Arya, Vinod Kumar","doi":"10.1007/s10661-025-14041-2","DOIUrl":"10.1007/s10661-025-14041-2","url":null,"abstract":"<div><p>Duckweed (<i>Lemna</i> species) is a group of fast-growing aquatic plants, widely recognized for its potential to restore polluted water bodies and recover valuable resources. The present review focused on the ecological importance of <i>Lemna</i> spp. in addressing ongoing environmental challenges. In order to obtain the relevant data, a literature search was conducted using the online database (Scopus), covering the period from 2015 to 2024. It has been observed that <i>Lemna</i> spp. has capabilities in nutrient assimilation, sequestering nitrogen, phosphorus, heavy metals, and emerging contaminants such as pharmaceuticals and pesticides. Also, the plant’s biomass, generated during remediation, is a valuable resource for bioenergy, animal feed, and biofertilizer production, thereby contributing to the circular economy. However, several challenges remain significant, such as variations in environmental conditions, logistical barriers, and biomass disposal concerns. Integrating <i>Lemna</i> spp.-based systems into water management strategies aligns with global Sustainable Development Goals (SDGs), particularly those related to clean water, sustainable urban development, and climate change mitigation. Empirical studies from regions like India, China, and the USA indicated its socio-economic and environmental benefits. Thus, the present review article focused on its role in pollutant remediation, resource recovery, and potential for sustainable water resource management.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875382","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}

引用次数: 0

Distribution, variability, and dietary risk assessment of etoxazole residues in apples and apple juice 苹果和苹果汁中乙恶唑残留的分布、变异和膳食风险评估

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-24 DOI: 10.1007/s10661-025-14034-1

Zhihui Feng, Yu Duan, Hongyan Bai, Xue Wang, Ye Du, Qian Zhang

{"title":"Distribution, variability, and dietary risk assessment of etoxazole residues in apples and apple juice","authors":"Zhihui Feng, Yu Duan, Hongyan Bai, Xue Wang, Ye Du, Qian Zhang","doi":"10.1007/s10661-025-14034-1","DOIUrl":"10.1007/s10661-025-14034-1","url":null,"abstract":"<div><p>Etoxazole, while preventing pest mites on apple trees, leaves some residues in the produce, triggering consumer concerns. Here, the study investigated the distribution of etoxazole in apples after application and the change pattern of residue during apple juice processing. An analytical method for the determination of etoxazole was established to meet the requirements of residue analysis, with accuracy ranging from 80 to 95% and precision from 1.3 to 7.8% and linearity with <i>R</i><sup>2</sup> > 0.9975. Changes in residue levels of etoxazole in apples were tested in 12 regions of China, and the results indicated that the residues in apples gradually decreased, with a dissipation half-life of 8.0–12.6 days. The final residues in apples harvested 28 and 35 days after application were below 0.08 mg/kg, which was below the maximum residue limits (0.1 mg/kg). The percentages of etoxazole in pulp, core, and peel were 45%, 37%, and 18%, respectively, whereas the pesticide was mainly enriched in the pomace after juicing. During apple juice processing, the best pesticide removal was achieved by juicing, with a removal rate of 72% and a processing factor of 0.11. After a series of apple juice processing steps, the residual pesticides were effectively removed with a total processing factor of 0.04. The dietary exposure risk index for etoxazole in apples harvested after 28 days was below 100%, indicating an acceptable risk level, with the highest risk index observed in young children. Moreover, the introduction of processing actions reduced the risk of dietary exposure to pesticides in processed products.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871229","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}

引用次数: 0

Assessment of soil loss dynamics in a wet tropical ecosystem: the case of the Sanaga basin at Nachtigal, Cameroon 湿润热带生态系统土壤流失动态评估：以喀麦隆Nachtigal的Sanaga盆地为例

IF 2.9 4区环境科学与生态学

Environmental Monitoring and Assessment Pub Date : 2025-04-24 DOI: 10.1007/s10661-025-14027-0

Henri Zobo Mbele, Jules Remy Ndam Ngoupayou, Zakari Mfonka, Amidou Kpoumie, Daouda Nsangou, Joachim Etouna

{"title":"Assessment of soil loss dynamics in a wet tropical ecosystem: the case of the Sanaga basin at Nachtigal, Cameroon","authors":"Henri Zobo Mbele, Jules Remy Ndam Ngoupayou, Zakari Mfonka, Amidou Kpoumie, Daouda Nsangou, Joachim Etouna","doi":"10.1007/s10661-025-14027-0","DOIUrl":"10.1007/s10661-025-14027-0","url":null,"abstract":"<div><p>Soil erosion threatens the planet, compromising natural resources and sustainable development, with irreversible consequences on fertility loss, water pollution, and biodiversity depletion. In Cameroon, the Sanaga basin at Nachtigal harbors strategic resources for the country’s development (drinking water, hydroelectric dam), which suffer the harmful effects of erosion; hindering the country’s socio-economic progress. This study aimed to evaluate the spatial and temporal dynamics of soil loss in the Sanaga basin at Nachtigal from 1980 to 2023. The method employed is based on the Revised Universal Soil Loss Equation (RUSLE). The results show that between 1980 and 2023, forests decreased by 15% among the five land use types, giving way to urbanized areas, cultivated lands, and bare soils. The analysis of soil loss reveals a significant increase in erosion rates, ranging from 0 t/ha/year in non-eroded areas to 1989.82 t/ha/year in the most affected. The average soil loss rate increased by 173.8%, rising from 25.17 t/ha/year in 1980 to 68.97 t/ha/year in 2023. Notably, more than 33% of the basin’s area has experienced intolerable soil loss rates exceeding 10 t/ha/year. Steep slope areas, areas with unsustainable agricultural practices, and areas with high rainfall erosivity represent the majority of the basin’s area affected by intolerable soil loss. The AUC (Area Under the Curve) method confirms the high accuracy of the erosion susceptibility maps, with a score ranging from 0.81 to 0.85. The maps generated from the study results are valuable tools for the implementation of soil and water conservation strategies in this region.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871434","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}

引用次数: 0