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Socioeconomic developments drove regime shifts of agriculture–ecology–economy nexus of social-ecological system: Four-decade lessons from southeast China
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-04 DOI: 10.1016/j.jenvman.2025.124729
Xinhua Li , Chong Jiang , Yixin Wang , Xiaohuang Liu , Jie Liu , Jun Wang , Ying Zhao , Yuexin Xiao , Zhiyuan Yang , Ran Wang
Urbanization has been recognized as an effective measure to promote socioeconomic development; however, it leads to cropland and habitat loss and aggravates ecosystem services (ESs), which have not been sufficiently and systematically revealed from the perspective of agriculture–ecology–economy nexus (AEEN). To address these knowledge gaps, this novel study adopted a hotspot of urbanization to examine the response dynamics of ESs and agricultural production to urbanization, as well as their regime shifts and interactions, by employing statistical records, satellite images, and incorporating biophysical model-based ESs into AEEN. In the past four decades, Guangdong has undergone rapid urbanization and associated landscape transformations, represented by cropland and wetland shrinkage and urban expansion, particularly around central city clusters, which have caused ESs degradation and grain productivity reduction. According to the regime shifts of the AEEN sectors and their systematic responses to socioeconomic developments and policy interventions, nexus sector interactions between agriculture and the economy in Phase I (1980–1997) and Phase III (2009–2020) had positive effects, while those in Phase II (1998–2008) were negative because of cropland loss and industrial structure adjustments. Network structure analysis and spatial panel model further revealed that natural environmental, socioeconomic, and landscape composition and structural factors were determinants of ES evolution and regime shifts in AEEN. Structural change analysis and systematic perspectives are essential for understanding the consequences and determinants of urbanization on agricultural production and ecosystem state by placing ESs within AEEN, which is expected to support landscape management and policy formulations for coordinated development that balance multi-sector benefits.
{"title":"Socioeconomic developments drove regime shifts of agriculture–ecology–economy nexus of social-ecological system: Four-decade lessons from southeast China","authors":"Xinhua Li ,&nbsp;Chong Jiang ,&nbsp;Yixin Wang ,&nbsp;Xiaohuang Liu ,&nbsp;Jie Liu ,&nbsp;Jun Wang ,&nbsp;Ying Zhao ,&nbsp;Yuexin Xiao ,&nbsp;Zhiyuan Yang ,&nbsp;Ran Wang","doi":"10.1016/j.jenvman.2025.124729","DOIUrl":"10.1016/j.jenvman.2025.124729","url":null,"abstract":"<div><div>Urbanization has been recognized as an effective measure to promote socioeconomic development; however, it leads to cropland and habitat loss and aggravates ecosystem services (ESs), which have not been sufficiently and systematically revealed from the perspective of agriculture–ecology–economy nexus (AEEN). To address these knowledge gaps, this novel study adopted a hotspot of urbanization to examine the response dynamics of ESs and agricultural production to urbanization, as well as their regime shifts and interactions, by employing statistical records, satellite images, and incorporating biophysical model-based ESs into AEEN. In the past four decades, Guangdong has undergone rapid urbanization and associated landscape transformations, represented by cropland and wetland shrinkage and urban expansion, particularly around central city clusters, which have caused ESs degradation and grain productivity reduction. According to the regime shifts of the AEEN sectors and their systematic responses to socioeconomic developments and policy interventions, nexus sector interactions between agriculture and the economy in Phase I (1980–1997) and Phase III (2009–2020) had positive effects, while those in Phase II (1998–2008) were negative because of cropland loss and industrial structure adjustments. Network structure analysis and spatial panel model further revealed that natural environmental, socioeconomic, and landscape composition and structural factors were determinants of ES evolution and regime shifts in AEEN. Structural change analysis and systematic perspectives are essential for understanding the consequences and determinants of urbanization on agricultural production and ecosystem state by placing ESs within AEEN, which is expected to support landscape management and policy formulations for coordinated development that balance multi-sector benefits.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124729"},"PeriodicalIF":8.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534894","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}
引用次数: 0
Optimizing denitrification with volatile fatty acids from hydrolysis acidification-treated domestic wastewater: Comparative effects of nitrate and nitrite using immobilized biofiller
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-04 DOI: 10.1016/j.jenvman.2025.124812
Siqi Li, Hong Yang
By embedding immobilized biofiller, 100% denitrification efficiency was achieved with nitrate or nitrite as electron acceptors utilizing volatile fatty acids (VFAs) from domestic wastewater after hydrolysis acidification. The consumption patterns of VFAs by functional bacteria and differences in nitrogen metabolic gene expression were thoroughly analyzed. Total consumption of acetic and propionic acids with >95% VFAs utilization was achieved utilizing nitrate, whereas the consumption of butyric and valeric acids was enhanced utilizing nitrite. Denitrification-related genes were all upregulated, particularly nosZ, indicating systemic N2O emission reduction potential. Electron acceptor changes dynamically shifted microbial dominance from Thauera (19.4%) to Thiobacillus (7.2%). These results provide valuable insights into the adaptability and ecological niche characterization of denitrifying bacteria, contributing to improving nitrogen removal efficiency, optimizing carbon source utilization, and reducing sludge production.
{"title":"Optimizing denitrification with volatile fatty acids from hydrolysis acidification-treated domestic wastewater: Comparative effects of nitrate and nitrite using immobilized biofiller","authors":"Siqi Li,&nbsp;Hong Yang","doi":"10.1016/j.jenvman.2025.124812","DOIUrl":"10.1016/j.jenvman.2025.124812","url":null,"abstract":"<div><div>By embedding immobilized biofiller, 100% denitrification efficiency was achieved with nitrate or nitrite as electron acceptors utilizing volatile fatty acids (VFAs) from domestic wastewater after hydrolysis acidification. The consumption patterns of VFAs by functional bacteria and differences in nitrogen metabolic gene expression were thoroughly analyzed. Total consumption of acetic and propionic acids with &gt;95% VFAs utilization was achieved utilizing nitrate, whereas the consumption of butyric and valeric acids was enhanced utilizing nitrite. Denitrification-related genes were all upregulated, particularly <em>nosZ</em>, indicating systemic N<sub>2</sub>O emission reduction potential. Electron acceptor changes dynamically shifted microbial dominance from <em>Thauera</em> (19.4%) to <em>Thiobacillus</em> (7.2%). These results provide valuable insights into the adaptability and ecological niche characterization of denitrifying bacteria, contributing to improving nitrogen removal efficiency, optimizing carbon source utilization, and reducing sludge production.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124812"},"PeriodicalIF":8.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548071","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}
引用次数: 0
Supply chain spillover effects of environmental taxes on emission reduction
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-04 DOI: 10.1016/j.jenvman.2025.124756
Xuechao Xia , Hui Sun , Zedong Yang , Xuefeng Zhang , Shusen Zhu , Luyao Xu , Yao Lu
Environmental taxes have become an essential tool for regulating pollution emissions. However, there is limited literature exploring the spillover effects of environmental taxes on emission reduction from a ‘point-to-line’ perspective. This study examines the supply chain spillover effects of environmental taxes levied on upstream and downstream enterprises on the emission reduction of focal enterprises, using data from Chinese A-share listed companies on the Shanghai and Shenzhen Stock Exchange from 2012 to 2021. The results show that: First, environmental taxes levied on upstream and downstream enterprises promote emission reduction in focal enterprises along the supply chain. Second, environmental taxes levied on upstream suppliers have greater supply chain spillover effects on the emission reductions of focal enterprises than those of downstream customer businesses. Environmental taxes levied on upstream and downstream enterprises from different industries have greater spillover effects on the emission reductions of focal enterprises than those levied by enterprises from the same industry. Third, the supply chain dependence of focal enterprises and the technological cooperation with upstream and downstream enterprises strengthen the supply chain spillover effects of environmental taxes. Industry competition weakens the supply chain spillover effects of environmental taxes. The above research conclusions not only reveal the supply chain spillover effects and spillover mechanisms of environmental taxes, but also provide a theoretical basis for improving emission reduction measures from the perspective of the supply chain.
{"title":"Supply chain spillover effects of environmental taxes on emission reduction","authors":"Xuechao Xia ,&nbsp;Hui Sun ,&nbsp;Zedong Yang ,&nbsp;Xuefeng Zhang ,&nbsp;Shusen Zhu ,&nbsp;Luyao Xu ,&nbsp;Yao Lu","doi":"10.1016/j.jenvman.2025.124756","DOIUrl":"10.1016/j.jenvman.2025.124756","url":null,"abstract":"<div><div>Environmental taxes have become an essential tool for regulating pollution emissions. However, there is limited literature exploring the spillover effects of environmental taxes on emission reduction from a ‘point-to-line’ perspective. This study examines the supply chain spillover effects of environmental taxes levied on upstream and downstream enterprises on the emission reduction of focal enterprises, using data from Chinese A-share listed companies on the Shanghai and Shenzhen Stock Exchange from 2012 to 2021. The results show that: First, environmental taxes levied on upstream and downstream enterprises promote emission reduction in focal enterprises along the supply chain. Second, environmental taxes levied on upstream suppliers have greater supply chain spillover effects on the emission reductions of focal enterprises than those of downstream customer businesses. Environmental taxes levied on upstream and downstream enterprises from different industries have greater spillover effects on the emission reductions of focal enterprises than those levied by enterprises from the same industry. Third, the supply chain dependence of focal enterprises and the technological cooperation with upstream and downstream enterprises strengthen the supply chain spillover effects of environmental taxes. Industry competition weakens the supply chain spillover effects of environmental taxes. The above research conclusions not only reveal the supply chain spillover effects and spillover mechanisms of environmental taxes, but also provide a theoretical basis for improving emission reduction measures from the perspective of the supply chain.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124756"},"PeriodicalIF":8.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548200","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}
引用次数: 0
Nitrogen conversion and mechanisms related to reduced emissions by adding exogenous modified magnesium ore during aerobic composting
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-03 DOI: 10.1016/j.jenvman.2025.124550
Li Zhang , Wanying Xu , Jiangxiang Jiang , Ronghua Li , Wen Liang
In this study, modified products with a higher specific surface area and pore volume were prepared by light burning magnesite (MS) to increase its magnesium content and surface activity. MS heated at 650 °C (MS650) was applied in aerobic composting to assess its effect on nitrogen transformation during composting and the possible related chemical and microbial mechanisms. Adding MS650 reduced the NH3 emissions (0.74–52.4%), N2O emissions (29.0–57.9%), and greenhouse gas emissions (41.8–60.3%), and its effect on reducing nitrogen emissions was negatively correlated with the amount added, where the optimum proportion of MS650 was 2.5%. Struvite precipitation and physical adsorption were the chemical mechanisms responsible for nitrogen retention. MS650 inhibited the growth of nitrifying, nitrate reducing, and denitrifying bacteria. The total organic carbon content, electrical conductivity, and N2O together explained most of the variation (52.7%) in nitrogen functional genes, followed by Proteobacteria (28.6%). These findings have important implications for reducing nitrogen and greenhouse gas emissions, and improving the quality of compost products.
{"title":"Nitrogen conversion and mechanisms related to reduced emissions by adding exogenous modified magnesium ore during aerobic composting","authors":"Li Zhang ,&nbsp;Wanying Xu ,&nbsp;Jiangxiang Jiang ,&nbsp;Ronghua Li ,&nbsp;Wen Liang","doi":"10.1016/j.jenvman.2025.124550","DOIUrl":"10.1016/j.jenvman.2025.124550","url":null,"abstract":"<div><div>In this study, modified products with a higher specific surface area and pore volume were prepared by light burning magnesite (MS) to increase its magnesium content and surface activity. MS heated at 650 °C (MS650) was applied in aerobic composting to assess its effect on nitrogen transformation during composting and the possible related chemical and microbial mechanisms. Adding MS650 reduced the NH<sub>3</sub> emissions (0.74–52.4%), N<sub>2</sub>O emissions (29.0–57.9%), and greenhouse gas emissions (41.8–60.3%), and its effect on reducing nitrogen emissions was negatively correlated with the amount added, where the optimum proportion of MS650 was 2.5%. Struvite precipitation and physical adsorption were the chemical mechanisms responsible for nitrogen retention. MS650 inhibited the growth of nitrifying, nitrate reducing, and denitrifying bacteria. The total organic carbon content, electrical conductivity, and N<sub>2</sub>O together explained most of the variation (52.7%) in nitrogen functional genes, followed by Proteobacteria (28.6%). These findings have important implications for reducing nitrogen and greenhouse gas emissions, and improving the quality of compost products.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124550"},"PeriodicalIF":8.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528907","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}
引用次数: 0
Climate risk exposure of global energy companies: Green chain vulnerability and countermeasures
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-03 DOI: 10.1016/j.jenvman.2025.124755
Shuai Che , Miaomiao Tao , Xiaohang Ren
We investigate how green energy supply chain vulnerabilities (GESCV) amplify climate-related risk exposure among major energy firms across 36 countries from 2010 to 2023. Our benchmark model substantiates that GESCV amplifies corporate exposure to climate-related risks, with risk quantified using the Fama-French Three-Factor model. The adverse effects remain pronounced in developing countries, fossil fuel-based firms, and high-climate policy uncertainty groups. Mechanism-wise, GESCV heightens climate-related risk exposure by diminishing total asset turnover and worsening investment inefficiency. Further analysis reveals that governance quality is the only significant factor mitigating the detrimental link between GESCV and climate risk exposure, whereas women's political empowerment and environmental technologies exhibit minimal influence. Additionally, a difference-in-differences (DID) model confirms that the Paris Agreement has played a role in easing the negative consequences of GESCV on climate-related risk exposure. These findings underscore the need for governance enhancements, diversified supply chain strategies, and policy-driven investments in green technologies as essential measures to curb climate risks during the global energy transition.
{"title":"Climate risk exposure of global energy companies: Green chain vulnerability and countermeasures","authors":"Shuai Che ,&nbsp;Miaomiao Tao ,&nbsp;Xiaohang Ren","doi":"10.1016/j.jenvman.2025.124755","DOIUrl":"10.1016/j.jenvman.2025.124755","url":null,"abstract":"<div><div>We investigate how green energy supply chain vulnerabilities (GESCV) amplify climate-related risk exposure among major energy firms across 36 countries from 2010 to 2023. Our benchmark model substantiates that GESCV amplifies corporate exposure to climate-related risks, with risk quantified using the Fama-French Three-Factor model. The adverse effects remain pronounced in developing countries, fossil fuel-based firms, and high-climate policy uncertainty groups. Mechanism-wise, GESCV heightens climate-related risk exposure by diminishing total asset turnover and worsening investment inefficiency. Further analysis reveals that governance quality is the only significant factor mitigating the detrimental link between GESCV and climate risk exposure, whereas women's political empowerment and environmental technologies exhibit minimal influence. Additionally, a difference-in-differences (DID) model confirms that the Paris Agreement has played a role in easing the negative consequences of GESCV on climate-related risk exposure. These findings underscore the need for governance enhancements, diversified supply chain strategies, and policy-driven investments in green technologies as essential measures to curb climate risks during the global energy transition.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124755"},"PeriodicalIF":8.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528991","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}
引用次数: 0
Oxidative stress induced by emerging halohydroxybenzonitrile disinfection byproducts and their binding interaction with catalase
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-03 DOI: 10.1016/j.jenvman.2025.124772
Shaoyang Hu, Fangyuan Dong, Xiangxiang Li, Ning Sun, Xiaoyang Wang, Shuqi Guo, Yuntao Qi, Rutao Liu
Halohydroxybenzonitriles (HHBNs) were reported to exist in drinking water as an emerging group of nitrogen-containing aromatic disinfection byproducts (DBPs). The involvement of binding energy with catalase (CAT) as one of molecular descriptors in the quantitative structure-activity relationship model for HHBN cytotoxicity supported that oxidative stress is highly possible to be an essential cytotoxicity mechanism for HHBNs, and the disruption of cellular redox homeostasis may be partly attributed to their interactions towards CAT. However, the relevant evidence is lacking as yet. Thus, in this study, typical biomarkers for oxidative stress and damage in HHBN-treated cells were examined, and the binding interactions between HHBN and CAT were explored. Results indicated that upon exposure to 3,5-dibromo-2-hydroxybenzonitrile, the antioxidant system (e.g., CAT, superoxide dismutase, and glutathione) was disrupted, and excessive reactive oxygen species gave rise to oxidative DNA damage, which further resulted in cell apoptosis. Moreover, the binding interaction between CAT and 3,5-dibromo-2-hydroxybenzonitrile could change the structure and activity of CAT, with the formation of complexes primarily dependent on van der Waals forces and hydrogen bonding. A positive correlation was observed between HHBN cytotoxicity and inhibitory potency on the biological function of CAT, and some unidentified iodinated HHBNs warrant special attention in future owing to their potential high cytotoxicity. The above results contribute to a better understanding of the toxic mechanisms of emerging HHBN DBPs.
{"title":"Oxidative stress induced by emerging halohydroxybenzonitrile disinfection byproducts and their binding interaction with catalase","authors":"Shaoyang Hu,&nbsp;Fangyuan Dong,&nbsp;Xiangxiang Li,&nbsp;Ning Sun,&nbsp;Xiaoyang Wang,&nbsp;Shuqi Guo,&nbsp;Yuntao Qi,&nbsp;Rutao Liu","doi":"10.1016/j.jenvman.2025.124772","DOIUrl":"10.1016/j.jenvman.2025.124772","url":null,"abstract":"<div><div>Halohydroxybenzonitriles (HHBNs) were reported to exist in drinking water as an emerging group of nitrogen-containing aromatic disinfection byproducts (DBPs). The involvement of binding energy with catalase (CAT) as one of molecular descriptors in the quantitative structure-activity relationship model for HHBN cytotoxicity supported that oxidative stress is highly possible to be an essential cytotoxicity mechanism for HHBNs, and the disruption of cellular redox homeostasis may be partly attributed to their interactions towards CAT. However, the relevant evidence is lacking as yet. Thus, in this study, typical biomarkers for oxidative stress and damage in HHBN-treated cells were examined, and the binding interactions between HHBN and CAT were explored. Results indicated that upon exposure to 3,5-dibromo-2-hydroxybenzonitrile, the antioxidant system (e.g., CAT, superoxide dismutase, and glutathione) was disrupted, and excessive reactive oxygen species gave rise to oxidative DNA damage, which further resulted in cell apoptosis. Moreover, the binding interaction between CAT and 3,5-dibromo-2-hydroxybenzonitrile could change the structure and activity of CAT, with the formation of complexes primarily dependent on van der Waals forces and hydrogen bonding. A positive correlation was observed between HHBN cytotoxicity and inhibitory potency on the biological function of CAT, and some unidentified iodinated HHBNs warrant special attention in future owing to their potential high cytotoxicity. The above results contribute to a better understanding of the toxic mechanisms of emerging HHBN DBPs.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124772"},"PeriodicalIF":8.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528892","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}
引用次数: 0
Long-term effects of individual and combined exposure to microplastics and copper in zebrafish hypothalamic-pituitary-gonadal axis – A multi-biomarker evaluation
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-03 DOI: 10.1016/j.jenvman.2025.124770
Dércia Santos , Edna Cabecinha , Ana Luzio , Juan Bellas , Sandra M. Monteiro
Microplastics (MPs) pollution and metal contamination are two prominent environmental stressors with multifaceted implications for aquatic life and ecosystem health. However, the underlying toxicological mechanisms of MPs and metals co-exposure on fish reproduction processes are largely unknown. In this study, zebrafish (Danio rerio) were exposed to MPs (2 mg/L), copper (25 μg/L, Cu25), and their mixture (Cu25 + MPs), for 30 days. The oxidative stress response, along with the expression profile of the hypothalamic-pituitary-gonadal (HPG) axis-related genes in the brain and gonad of zebrafish, were evaluated.
The findings demonstrated that exposure to MPs and Cu affects the antioxidant system of zebrafish brain and gonads, inhibiting GPx in individuals exposed to MPs, Cu25, and their mixture. The gene expression analysis revealed dysregulation of the HPG axis-related genes. Specifically, the androgen receptor (ar), estrogen receptor 1 (esr1), follicle-stimulating hormone (fsh), and gonadotropin-releasing hormone 2 (gnrh2) were upregulated in the brain, whereas the genes esr2a, ar, cytochrome P450 family 11 subfamily A member 1 (cyp11a) and cyp19a were upregulated in the gonads. Both the biochemical and gene expression results showed that the brain and gonads were differently affected by MPs and Cu with the effects varying with fish gender. Furthermore, the mixture exposure affected the brain the most, and the individual pollutants affected the gonads the most.
Overall, this study highlights that MPs, alone or combined with Cu, adversely affect the HPG axis of zebrafish, posing a potential threat to the reproduction of fish populations.
{"title":"Long-term effects of individual and combined exposure to microplastics and copper in zebrafish hypothalamic-pituitary-gonadal axis – A multi-biomarker evaluation","authors":"Dércia Santos ,&nbsp;Edna Cabecinha ,&nbsp;Ana Luzio ,&nbsp;Juan Bellas ,&nbsp;Sandra M. Monteiro","doi":"10.1016/j.jenvman.2025.124770","DOIUrl":"10.1016/j.jenvman.2025.124770","url":null,"abstract":"<div><div>Microplastics (MPs) pollution and metal contamination are two prominent environmental stressors with multifaceted implications for aquatic life and ecosystem health. However, the underlying toxicological mechanisms of MPs and metals co-exposure on fish reproduction processes are largely unknown. In this study, zebrafish (<em>Danio rerio</em>) were exposed to MPs (2 mg/L), copper (25 μg/L, Cu25), and their mixture (Cu25 + MPs), for 30 days. The oxidative stress response, along with the expression profile of the hypothalamic-pituitary-gonadal (HPG) axis-related genes in the brain and gonad of zebrafish, were evaluated.</div><div>The findings demonstrated that exposure to MPs and Cu affects the antioxidant system of zebrafish brain and gonads, inhibiting GPx in individuals exposed to MPs, Cu25, and their mixture. The gene expression analysis revealed dysregulation of the HPG axis-related genes. Specifically, the <em>androgen receptor (ar)</em>, <em>estrogen receptor 1 (esr1)</em>, <em>follicle-stimulating hormone</em> (<em>fsh</em>), and <em>gonadotropin-releasing hormone 2</em> (<em>gnrh2</em>) were upregulated in the brain, whereas the genes <em>esr2a</em>, <em>ar</em>, <em>cytochrome P450 family 11 subfamily A member 1</em> (<em>cyp11a</em>) and <em>cyp19a</em> were upregulated in the gonads. Both the biochemical and gene expression results showed that the brain and gonads were differently affected by MPs and Cu with the effects varying with fish gender. Furthermore, the mixture exposure affected the brain the most, and the individual pollutants affected the gonads the most.</div><div>Overall, this study highlights that MPs, alone or combined with Cu, adversely affect the HPG axis of zebrafish, posing a potential threat to the reproduction of fish populations.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124770"},"PeriodicalIF":8.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528894","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}
引用次数: 0
Addressing pre-harvesting sugarcane burning in Thailand: A quasi-experimental study of monetary incentive
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-03 DOI: 10.1016/j.jenvman.2025.124780
Loylom Prasertsri , Tiraphap Fakthong , Piyawong Punjatewakupt , Alongkorn Tanasritunyakul , Nondh Nuchmorn , Krajangsri Srikrajang Phasomsap , Jeerayu Khowchernklang , Atiya Wongwat , Pollawat Houngthai
In Thailand, the recurring environmental issue of high PM2.5 concentrations from December to April is partly due to pre-harvest sugarcane burning. This practice severely impacts the environment, economy, and public health. To combat this, the Thai government aims to eliminate pre-harvest sugarcane burning by 2024 through a voluntary monetary incentive scheme. This study employs a quasi-experimental approach in eight Thai regions to evaluate the policy's effectiveness. Using the strategy method, this paper aims to determine the Minimum Acceptable Price (MAP) and Willingness to Accept (WTA) for farmers to switch from selling burned to fresh sugarcane. Findings indicate that the positive incentive of THB 120 per ton for fresh sugarcane influences 88.77% of farmers to cooperate. To achieve over 90% compliance, the subsidy should increase to THB 150 per ton, requiring an additional budget of approximately THB 2,100 million per crop season. Conversely, the negative incentive measure, which follows the “polluter pays principle,” involves deducting THB 30 per ton from the sale price of burned sugarcane. This results in 82.17% of farmers switching to fresh sugarcane. To reach the 90% effectiveness target, the deduction should increase to THB 50 per ton, potentially leading to a fine collection of THB 378.85 million based on the previous season's production. This study's findings will inform future policy adjustments and contribute to academic knowledge on farmers' responsiveness to public policies.
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引用次数: 0
Evaluating the efficacy of an integrated law enforcement approach to safeguarding Sumatran tigers and their prey
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-03 DOI: 10.1016/j.jenvman.2025.124759
Adhi Nurul Hadi , Ulfah Mardhiah , Sasha Sepasthika Suryometaram , Saddam Hussein , Yosia Ginting , Ahtu Trihangga , Rinaldo Rinaldo , Oktafa Rini Puspita , Tarmizi Tarmizi , Edward Efendi Rumapea , Eka Ramadiyanta , Giyanto Giyanto , Jatna Supriatna , Muhamad Jeri Imansyah , Dwi Nugroho Adhiasto , William Marthy , Jeffry Susyafrianto , Noviar Andayani
Protected areas face immense pressure for their resources and the space that they occupy. To protect them and their wildlife, management approaches such as ranger patrols and measures to counter wildlife trafficking across the broader landscape have been implemented, despite integration of both approaches remains limited. This study aimed to evaluate such implementation in one of Asia's most significant protected area landscapes. This was done by analysing 1) an adaptive ranger patrolling strategy to reduce tiger (Panthera tigris) and ungulate prey poaching rates; 2) a government-civil society partnership to reduce tiger trafficking in adjoining rural and urban areas; and 3) tiger and prey population trends in response to these interventions. From 2015 to 2019, five ranger teams conducted 457 anti-poaching foot patrols, covering 10,963 km and removing 780 snares commonly encountered in accessible lowland. Over the years, snare occupancy did not change but detection was found to increase. From 2010 to 2019, law enforcement responded to 26 tiger trafficking cases with earlier cases mainly prosecuted using administrative sanctions. After 2013, most received penal sanctions with significant increases in fines levied. Camera trapping from 2010 to 2020 revealed a likely stable tiger population with high turnover of individual tigers. Only one male captured on all three sampling occasions and one adult female captured on two occasions. From 2010 to 2020, three tiger prey species (muntjac (Muntiacus muntjak), serow (Capricornis sumatraensis), and pig-tailed macaque (Macaca nemestrina)) remained widespread during the study, whereas wild boar (Sus scrofa) and sambar deer (Rusa unicolor) remain localised. Despite effective snare removals and arrests, the threat of poaching persists, suggesting that patrolling in at-risk areas needs to be coupled with new, persuasive, and more targeted approaches, while ensuring sustainable funding for these interventions.
{"title":"Evaluating the efficacy of an integrated law enforcement approach to safeguarding Sumatran tigers and their prey","authors":"Adhi Nurul Hadi ,&nbsp;Ulfah Mardhiah ,&nbsp;Sasha Sepasthika Suryometaram ,&nbsp;Saddam Hussein ,&nbsp;Yosia Ginting ,&nbsp;Ahtu Trihangga ,&nbsp;Rinaldo Rinaldo ,&nbsp;Oktafa Rini Puspita ,&nbsp;Tarmizi Tarmizi ,&nbsp;Edward Efendi Rumapea ,&nbsp;Eka Ramadiyanta ,&nbsp;Giyanto Giyanto ,&nbsp;Jatna Supriatna ,&nbsp;Muhamad Jeri Imansyah ,&nbsp;Dwi Nugroho Adhiasto ,&nbsp;William Marthy ,&nbsp;Jeffry Susyafrianto ,&nbsp;Noviar Andayani","doi":"10.1016/j.jenvman.2025.124759","DOIUrl":"10.1016/j.jenvman.2025.124759","url":null,"abstract":"<div><div>Protected areas face immense pressure for their resources and the space that they occupy. To protect them and their wildlife, management approaches such as ranger patrols and measures to counter wildlife trafficking across the broader landscape have been implemented, despite integration of both approaches remains limited. This study aimed to evaluate such implementation in one of Asia's most significant protected area landscapes. This was done by analysing 1) an adaptive ranger patrolling strategy to reduce tiger (<em>Panthera tigris)</em> and ungulate prey poaching rates; 2) a government-civil society partnership to reduce tiger trafficking in adjoining rural and urban areas; and 3) tiger and prey population trends in response to these interventions. From 2015 to 2019, five ranger teams conducted 457 anti-poaching foot patrols, covering 10,963 km and removing 780 snares commonly encountered in accessible lowland. Over the years, snare occupancy did not change but detection was found to increase. From 2010 to 2019, law enforcement responded to 26 tiger trafficking cases with earlier cases mainly prosecuted using administrative sanctions. After 2013, most received penal sanctions with significant increases in fines levied. Camera trapping from 2010 to 2020 revealed a likely stable tiger population with high turnover of individual tigers. Only one male captured on all three sampling occasions and one adult female captured on two occasions. From 2010 to 2020, three tiger prey species (muntjac (<em>Muntiacus muntjak</em>), serow (<em>Capricornis sumatraensis</em>), and pig-tailed macaque (<em>Macaca nemestrina</em>)) remained widespread during the study, whereas wild boar (<em>Sus scrofa</em>) and sambar deer (<em>Rusa unicolor</em>) remain localised. Despite effective snare removals and arrests, the threat of poaching persists, suggesting that patrolling in at-risk areas needs to be coupled with new, persuasive, and more targeted approaches, while ensuring sustainable funding for these interventions.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124759"},"PeriodicalIF":8.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534879","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}
引用次数: 0
Evaluating future climate-driven changes in agricultural water resilience: Insights from CMIP6 model simulations for the Kagera River sub-basin
IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-03-03 DOI: 10.1016/j.jenvman.2025.124745
Nickson Tibangayuka , Deogratias M.M. Mulungu , Fides Izdori
Climate change poses a major threat to the availability of agricultural water in many regions of sub-Saharan Africa. This study evaluates the future climate-driven changes in the resilience of agricultural water (AgWater) in the Kagera River sub-basin, Tanzania. Climate projections were derived from CMIP6 muti-model simulations, while the Hydrologic Engineering Center Hydrologic Modeling System (HEC-HMS) was used to simulate the impact of climate change on river flows. The initial resilience evaluation system comprised of 94 indicators representing exposure, sensitivity, and adaptive capacity, which were screened to 66 indicators using a correlation matrix method. Indicator weighting was determined using two objective methods (entropy and CRITIC), and one subjective method (grey relational analysis). The results revealed significant future changes in both climate and hydrological regimes in the sub-basin, along with notable shifts in climate and hydrological extremes. The projected hydro-meteorological changes are expected to significantly impact the resilience of AgWater. The baseline resilience score of 0.38 is expected to increase to between 0.49 and 0.60 by the 2050s, with further increases ranging from 0.48 to 0.57 by the 2070s, and from 0.48 to 0.55 by the 2090s. Therefore, climate-driven changes are expected to positively impact the resilience of AgWater. These findings are crucial for informing adaptation strategies and policy development to enhance agricultural production in response to the impacts of climate change.
{"title":"Evaluating future climate-driven changes in agricultural water resilience: Insights from CMIP6 model simulations for the Kagera River sub-basin","authors":"Nickson Tibangayuka ,&nbsp;Deogratias M.M. Mulungu ,&nbsp;Fides Izdori","doi":"10.1016/j.jenvman.2025.124745","DOIUrl":"10.1016/j.jenvman.2025.124745","url":null,"abstract":"<div><div>Climate change poses a major threat to the availability of agricultural water in many regions of sub-Saharan Africa. This study evaluates the future climate-driven changes in the resilience of agricultural water (AgWater) in the Kagera River sub-basin, Tanzania. Climate projections were derived from CMIP6 muti-model simulations, while the Hydrologic Engineering Center Hydrologic Modeling System (HEC-HMS) was used to simulate the impact of climate change on river flows. The initial resilience evaluation system comprised of 94 indicators representing exposure, sensitivity, and adaptive capacity, which were screened to 66 indicators using a correlation matrix method. Indicator weighting was determined using two objective methods (entropy and CRITIC), and one subjective method (grey relational analysis). The results revealed significant future changes in both climate and hydrological regimes in the sub-basin, along with notable shifts in climate and hydrological extremes. The projected hydro-meteorological changes are expected to significantly impact the resilience of AgWater. The baseline resilience score of 0.38 is expected to increase to between 0.49 and 0.60 by the 2050s, with further increases ranging from 0.48 to 0.57 by the 2070s, and from 0.48 to 0.55 by the 2090s. Therefore, climate-driven changes are expected to positively impact the resilience of AgWater. These findings are crucial for informing adaptation strategies and policy development to enhance agricultural production in response to the impacts of climate change.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"378 ","pages":"Article 124745"},"PeriodicalIF":8.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534885","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}
引用次数: 0
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Journal of Environmental Management
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