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Ren Y, Shi W, Chen J, Li J. Water quality drives the reconfiguration of riverine planktonic microbial food webs. Environ Res 2024; 249:118379. [PMID: 38331144 DOI: 10.1016/j.envres.2024.118379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/10/2024]
Abstract
The food web is a cycle of matter and energy within river ecosystems. River environmental changes resulting from human activities are increasingly threatening the composition and diversity of global aquatic organisms and the multi-trophic networks. How multiple environmental factors influence food web patterns among multi-trophic microbial communities in rivers remains largely unknown. Using water quality evaluation and meta-omics techniques, we investigated the composition, structure and interaction characteristics, and drivers of food webs of microorganisms (archaea, bacteria, fungi, protists, metazoa, viridiplantae and viruses) at multiple trophic levels in different water quality environments (Classes II, III, and IV). First, water quality deterioration led to significant changes in the composition of the microbial community at multiple trophic levels, which were represented by the enrichment of Euryarchaeota in the archaeal community, the increase of r-strategists in the bacterial community, and the increase of the proportion of predators in the protist community. Second, deteriorating water quality resulted in a significant reduction in the dissimilarity of community structure (homogenization of community structure in Class III and IV waters). Of the symbiotic, parasitic, and predatory networks, the community networks in Class II water all showed the most stable symbiotic, parasitic, and predatory correlations (higher levels of modularity in the networks). In Class III and IV waters, nutrient inputs have led to increased reciprocal symbiosis and decreased competition between communities, which may have the risk of a positive feedback loop driving a system collapse. Finally, inputs of phosphorus and organic matter could be the main drivers of changes in the planktonic microbial food web in the Fen River. Overall, the results indicated the potential ecological risks of exogenous nutrient inputs, which were important for aquatic ecosystem conservation.
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Affiliation(s)
- Yanmin Ren
- Institute of Loess Plateau, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Wei Shi
- Institute of Loess Plateau, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Jianwen Chen
- Institute of Loess Plateau, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Junjian Li
- Institute of Loess Plateau, Shanxi University, Taiyuan, 030006, Shanxi, China.
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2
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Li L, Xia R, Dou M, Zhang K, Chen Y, Jia R, Li X, Dou J, Li X, Hu Q, Zhang H, Zhong N, Yan C. Integrated machine learning reveals aquatic biological integrity patterns in semi-arid watersheds. J Environ Manage 2024; 359:121054. [PMID: 38728982 DOI: 10.1016/j.jenvman.2024.121054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 01/28/2024] [Accepted: 04/29/2024] [Indexed: 05/12/2024]
Abstract
Semi-arid regions present unique challenges for maintaining aquatic biological integrity due to their complex evolutionary mechanisms. Uncovering the spatial patterns of aquatic biological integrity in these areas is a challenging research task, especially under the compound environmental stress. Our goal is to address this issue with a scientifically rigorous approach. This study aims to explore the spatial analysis and diagnosis method of aquatic biological based on the combination of machine learning and statistical analysis, so as to reveal the spatial differentiation patterns and causes of changes of aquatic biological integrity in semi-arid regions. To this end, we have introduced an innovative approach that combines XGBoost-SHAP and Fuzzy C-means clustering (FCM), we successfully identified and diagnosed the spatial variations of aquatic biological integrity in the Wei River Basin (WRB). The study reveals significant spatial variations in species number, diversity, and aquatic biological integrity of phytoplankton, serving as a testament to the multifaceted responses of biological communities under the intricate tapestry of environmental gradients. Delving into the depths of the XGBoost-SHAP algorithm, we discerned that Annual average Temperature (AT) stands as the pivotal driver steering the spatial divergence of the Phytoplankton Integrity Index (P-IBI), casting a positive influence on P-IBI when AT is below 11.8 °C. The intricate interactions between hydrological variables (VF and RW) and AT, as well as between water quality parameters (WT, NO3-N, TP, COD) and AT, collectively sculpt the spatial distribution of P-IBI. The fusion of XGBoost-SHAP with FCM unveils pronounced north-south gradient disparities in aquatic biological integrity across the watershed, segmenting the region into four distinct zones. This establishes scientific boundary conditions for the conservation strategies and management practices of aquatic ecosystems in the region, and its flexibility is applicable to the analysis of spatial heterogeneity in other complex environmental contexts.
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Affiliation(s)
- Lina Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; School of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Rui Xia
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Ming Dou
- School of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Kai Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Yan Chen
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Ruining Jia
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Northwest University College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China
| | - Xiaoxuan Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Jinghui Dou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Northwest University College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China
| | - Xiang Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Qiang Hu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Hui Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; School of Information Technology & Management, University of International Business and Economics, 100029, China
| | - Nixi Zhong
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Northwest University College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China
| | - Chao Yan
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Northwest University College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China
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Cui Z, Fan W, Chen C, Mo K, Chen Q, Zhang Q, He R. Ecosystem health evaluation of urban rivers based on multitrophic aquatic organisms. J Environ Manage 2024; 349:119476. [PMID: 37992661 DOI: 10.1016/j.jenvman.2023.119476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 09/25/2023] [Accepted: 10/19/2023] [Indexed: 11/24/2023]
Abstract
The ecosystem health evaluation method of urban rivers is significantly different from natural rivers, because of intensive human interferences and ecological restoration measures. Biotic integrity index (IBI) provides a method to quantify the response of aquatic organisms to environmental stress. Multi-trophic aquatic organisms may exhibit different responses and sensitivities to stress factors, which affects the reliability of the IBIs. This study proposed a hypothesis that the biota with the higher trophic level (whose habitat was not completely destroyed) or that of the biota with the shorter life cycle would be more sensitive in urban rivers. To prove the above hypothesis, the ecosystem health status of urban rivers was evaluated by the IBIs across multitrophic groups, including benthic invertebrates, zooplankton, phytoplankton, periphyton algae and microorganisms. The reliability of the IBIs was assessed by estimating their relationship with water quality index (WQI). The spatial distribution differences of the IBIs were distinguished by spatial autocorrelation analysis. The results showed that the IBI based on benthic invertebrates cannot mask the effects of dredging. Compared with the IBIs from other trophic groups, the correlation coefficients between the IBIs based on zooplankton and microorganisms and WQI were higher. Moreover, the evaluation results of Z (Zooplankton)-IBI and M (Microorganism)-IBI were able to discriminate the least, medium and highly impaired site groups divided by WQI. For the spatial response mode, Z-IBI and M-IBI could identify the high-value river sections under ecosystem restoration projects, and Z-IBI could also identify the low-value river sections under intensive human interferences. Therefore, Z-IBI and M-IBI could be recommended as the priority application in urban rivers. The constructed ecosystem health evaluation framework for urban rivers would play a guiding role in reducing impairments and restoring water ecosystem quality.
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Affiliation(s)
- Zhen Cui
- The National Key Laboratory of Water Disaster Prevention, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China
| | - Wenting Fan
- Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China
| | - Cheng Chen
- The National Key Laboratory of Water Disaster Prevention, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China; College of Water Conservancy and Hydroelectric Power, Hohai University, Nanjing 210098, China
| | - Kangle Mo
- The National Key Laboratory of Water Disaster Prevention, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China
| | - Qiuwen Chen
- The National Key Laboratory of Water Disaster Prevention, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Yangtze Institute for Conservation and Green Development, Nanjing 210029, China.
| | - Qiang Zhang
- Gulou District Water Affairs Bureau, Nanjing 210036, China
| | - Rong He
- Gulou District Water Affairs Bureau, Nanjing 210036, China
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do Rego EL, Portela JF, de Lima Ribeiro C, de Souza JPR, de Sousa Tonhá M, Peres LGM, Nakamura TC, da Silva JDS, de Souza JR. Spatio-temporal study of water quality variables in the Rio de Ondas Hydrographic Basin, west of Bahia, Brazil using multivariate analysis. Environ Monit Assess 2023; 195:1175. [PMID: 37688594 DOI: 10.1007/s10661-023-11823-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 09/01/2023] [Indexed: 09/11/2023]
Abstract
Water bodies are containers that receive a large load of water quality variables through the release of domestic, industrial, and agricultural effluents. With this focus, this work aimed to conduct a temporal-spatial variability study in the Rio de Ondas Hydrographic Basin through multivariate statistical analysis. For this, seventeen collection sites were established in four stations along the Rio de Ondas and its tributaries between 2017 and 2018. Ionic chromatography with suppressed conductivity was used for ions determination, while ICP-OES determined metals' total concentrations. The land use and occupation assessment between 1985 and 2021 was using data from MapBiomas were used and the descriptive and multivariate analysis of the data using version free of the Statistica software. The results showed that, in 30 years, there was a growth of 569% of agricultural activities in the watershed area, with significant suppression of native vegetation, favoring the transport of contaminants to rivers. Ca2+, PO42-, Al, Cu, and Zn concentrations showed a statistically significant difference between the seasons, with higher medians in the rainy season. Rainy season influenced the formation of three groups in the PCA, consisting of electrical conductivity, salinity, TDS, and PO42- (group 1); temperature, Fe, SO42-, and Cl- (group 2); and Ca2+, Mg2+, Na+, and HCO3- (group 3). The strong correlation between parameters of each group indicates anthropic influence on the watershed's water quality. However, levels are within the potability standard.
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Affiliation(s)
- Enoc Lima do Rego
- Institute of Chemistry, University of Brasília, Brasília, 70910-900, Brazil.
- Center of Exacts and Technological Sciences, Federal University of the West of Bahia, Barreiras, Brazil.
- Baiano Federal Institute of Education, Science and Technology, Campus Guanambi, Guanambi, Brazil.
| | | | | | | | | | | | - Thamilin Costa Nakamura
- Institute of Chemistry, University of Brasília, Brasília, 70910-900, Brazil
- Center of Exacts and Technological Sciences, Federal University of the West of Bahia, Barreiras, Brazil
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Cao Y, Zhou Z, Liao Q, Shen S, Wang W, Xiao P, Liao J. Effects of landscape conservation on the ecohydrological and water quality functions and services and their driving factors. Sci Total Environ 2023; 861:160695. [PMID: 36493830 DOI: 10.1016/j.scitotenv.2022.160695] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/09/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Since the implementation of landscape conservation of the green heart area in the Changsha-Zhuzhou-Xiangtan Metropolitan Region, the landscape structure and pattern have changed significantly. The ecosystem service functions in the area have been improved, but the status of ecohydrological and water quality and service functions (EHWQSFs) is still unclear. To clarify the status of EHWQSFs and their driving factors influenced by landscape conservation, this study analysed landscape changes using remote sensing image data from 1998, 2008, and 2018 and the changes and their spatial characteristics using the Soil and Water Assessment Tool (SWAT) and spatial analysis methods. The results showed that the dominant land types in the area were forestland and cropland from 1998 to 2018; the area of forestland and construction land expanded and that of cropland decreased year by year; the annual average surface runoff volume rose, and the annual average actual evapotranspiration and soil water content fell from 1998 to 2008 and rose from 2008 to 2018; and all pollutant indicators decreased significantly after 2008. The areas with higher surface runoff were mainly concentrated in the central and southern regions, those with higher evapotranspiration were in the northwestern and southwestern regions, those with higher soil water content were in the northern region, and those with higher sediment and nitrogen and phosphorus pollutant contents were in the central and southeastern regions. The results showed that land use, land cover and meteorological factors were the most significant drivers on EHWQSFs and illustrated that EHWQSFs in the area decreased after 1998. There was a significant improvement after 2008 and the area currently has a good status. This study not only provides insights into land use, land cover and meteorological factors that have significant impacts on EHWQSFs but also highlights that the landscape conservation of the area can improve ecosystem service functions.
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Affiliation(s)
- Yuchi Cao
- College of Landscape Architecture, Central South University of Forestry Technology, Changsha 410004, Hunan, China; Hunan Provincial Big Data Engineering Technology Research Center of Natural Reserve and Landscape Resource; Institute of Human Settlements and Green Infrastructure of Central South University of Forestry and Technology
| | - Zhen Zhou
- College of Landscape Architecture, Central South University of Forestry Technology, Changsha 410004, Hunan, China; Hunan Provincial Big Data Engineering Technology Research Center of Natural Reserve and Landscape Resource; Institute of Human Settlements and Green Infrastructure of Central South University of Forestry and Technology
| | - Qiulin Liao
- College of Landscape Architecture, Central South University of Forestry Technology, Changsha 410004, Hunan, China; Hunan Provincial Big Data Engineering Technology Research Center of Natural Reserve and Landscape Resource; Institute of Human Settlements and Green Infrastructure of Central South University of Forestry and Technology.
| | - Shouyun Shen
- College of Landscape Architecture, Central South University of Forestry Technology, Changsha 410004, Hunan, China; Hunan Provincial Big Data Engineering Technology Research Center of Natural Reserve and Landscape Resource; Institute of Human Settlements and Green Infrastructure of Central South University of Forestry and Technology.
| | - Weiwei Wang
- College of Landscape Architecture, Central South University of Forestry Technology, Changsha 410004, Hunan, China; Hunan Provincial Big Data Engineering Technology Research Center of Natural Reserve and Landscape Resource; Institute of Human Settlements and Green Infrastructure of Central South University of Forestry and Technology
| | - Peng Xiao
- College of Landscape Architecture, Central South University of Forestry Technology, Changsha 410004, Hunan, China; Hunan Provincial Big Data Engineering Technology Research Center of Natural Reserve and Landscape Resource; Institute of Human Settlements and Green Infrastructure of Central South University of Forestry and Technology
| | - Jingpeng Liao
- College of Landscape Architecture, Central South University of Forestry Technology, Changsha 410004, Hunan, China; Hunan Provincial Big Data Engineering Technology Research Center of Natural Reserve and Landscape Resource; Institute of Human Settlements and Green Infrastructure of Central South University of Forestry and Technology
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Ruhela M, Sharma K, Bhutiani R, Chandniha SK, Kumar V, Tyagi K, Ahamad F, Tyagi I. GIS-based impact assessment and spatial distribution of air and water pollutants in mining area. Environ Sci Pollut Res Int 2022; 29:31486-31500. [PMID: 35001266 DOI: 10.1007/s11356-021-18009-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Mining is a significant part of the transforming economy, which is generally considered as essential as well as social evil at the same time. It is one of the potential contributors to air and water pollution and possesses long-term impact on their quality. Keeping in view the exponential mining activities, we have selected an iron mine area in Bailadila, Chhattisgarh, India, as a sampling site and investigated the impact of mining activities on the air as well as water quality by setting up seven air quality and thirty water quality monitoring stations. From the results obtained, it was observed that concentration of air pollutants such as SO2, NO2, PM2.5 and PM10 for the year 2015 lies in the range of 11.5-13.0 µg/m3, 11.5-13.0 µg/m3, 24.9-33.4 ppm and 61.6-74.2 ppm, respectively, while for the year 2018, it lies in the range of 10.3-11.7 µg/m3, 10.5-14.7 µg/m3, 18.3-50.8 ppm and 23.7-60.7 ppm, respectively. Furthermore, results obtained revealed that air pollutants such as SO2, NO2, PM2.5 and PM10 were within the permissible limits but they contributed towards the light air pollution (air pollution index: 25-50) at all the air monitoring stations. Moreover, PM10 was considered as criterion pollutant in the Bailadila, Chhattisgarh region. On the other hand, it was observed that groundwater quality was deteriorated in the subsequent years. Most of the water quality parameters were in the permissible limits except iron (Fe). Moreover, on the basis of water quality indexing, water quality was classified as "poor" in ~ 30% of the sites and "very poor" in ~ 34% sites. The water quality was "unhealthy for drinking" in 3% and 6% sites in the year 2015 and 2018, respectively.
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Affiliation(s)
- Mukesh Ruhela
- Department of Environmental Engineering (SITE), Swami Vivekanand Subharti University, Meerut, 250005, (UP), India
| | - Kaberi Sharma
- Department of Environmental Engineering (SITE), Swami Vivekanand Subharti University, Meerut, 250005, (UP), India
| | - Rakesh Bhutiani
- Limnology and Ecological Modelling Lab, Department of Zoology and Environmental Science, Gurukul Kangri (Deemed to be University), Haridwar, 249404, (UK), India
| | - Surendra Kumar Chandniha
- Department of Soil and Water Engineering, BRSM College of Agricultural Engineering and Technology & Research Station, IGKV, Mungeli, 495334, Chhattisgarh, India
| | - Vikas Kumar
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, MoEF&CC), Kolkata, 700053, (WB), India
| | - Kaomud Tyagi
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, MoEF&CC), Kolkata, 700053, (WB), India
| | - Faheem Ahamad
- Keral Verma Subharti College of Sciences (KVSCOS), Swami Vivekanand Subharti University, Meerut, 250005, UP, India.
| | - Inderjeet Tyagi
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, MoEF&CC), Kolkata, 700053, (WB), India.
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Li Y, Dong Z, Feng D, Zhang X, Jia Z, Fan Q, Liu K. Study on the risk of soil heavy metal pollution in typical developed cities in eastern China. Sci Rep 2022; 12:3855. [PMID: 35264659 PMCID: PMC8907225 DOI: 10.1038/s41598-022-07864-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 02/25/2022] [Indexed: 11/09/2022] Open
Abstract
Enrichment of heavy metals in urban soils has become a major regional environmental risk. At present, research on the soil heavy metals in cities lacks risk spatial correlation analyses between different heavy metals, and there is a relative lack of assessments of the ecological and health risks. We selected Wuxi, a typical developed city of eastern China, collected and tested the contents of heavy metals in the urban soils of Wuxi in May 2020. Combined with Pb isotope analysis, ecological and health risk assessment, we found that the high heavy metal concentrations in Wuxi are mainly located in the central and western regions, and that the changes in spatial fluctuation are relatively small. The Pb isotopes in the urban soils of Wuxi are distributed in areas, such as those are related to coal combustion, automobile exhaust and urban garbage, indicating that the heavy metals in the urban soils of Wuxi are affected by human activities such as coal combustion and automobile exhaust. The average value of the potential ecological risk index of soil heavy metal Cd is 80.3 (the threshold: 40), which represents a high-risk state. Whether adults or children, the risk of soil heavy metals via ingestion is much higher than that through skin exposure. High health risk values are present in the central area of Wuxi and decrease in a ring-shaped pattern, which is similar to the population distribution of Wuxi and greatly increases the potential risk from soil heavy metals, which should be given close attention. We should develop and use clean energy to replace petroleum fossil fuels, especially in densely populated areas. This study provides technical support for the prevention and control of urban heavy metal pollution.
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Affiliation(s)
- Yan Li
- Collaborative Innovation Center of Sustainable Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China. .,Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, Jiangsu, China. .,Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, China.
| | - Zhen Dong
- Collaborative Innovation Center of Sustainable Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Dike Feng
- Collaborative Innovation Center of Sustainable Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Xiaomian Zhang
- Zhejiang Academy of Forestry Sciences, Hangzhou, Zhejiang, China
| | - Zhenyi Jia
- School of Geography and Ocean Science, Nanjing University, 163 Xianlin Road, Nanjing, Jiangsu, China
| | - Qingbin Fan
- Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Ke Liu
- School of Geography and Ocean Science, Nanjing University, 163 Xianlin Road, Nanjing, Jiangsu, China
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Li Y, Ma L, Li Y, Abdyzhapar Uulu S, Abuduwaili J. Exploration of the driving factors and distribution of fecal coliform in rivers under a traditional agro-pastoral economy in Kyrgyzstan, Central Asia. Chemosphere 2022; 286:131700. [PMID: 34333187 DOI: 10.1016/j.chemosphere.2021.131700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 07/01/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
Fecal coliform (FC) in river water is one of the threats to human health. To explore the pollution status of FC in rivers of Kyrgyzstan, a mountainous country with traditional agro-pastoral economy, 184 water samples from the rivers of Kyrgyzstan in low and high river flow period were analyzed. Spatial autocorrelation and classical statistical methods were used to analyze the spatiotemporal distribution and driving factors of FC. The results showed that the surface water quality of Kyrgyz rivers was good, and the concentration range of FC was 0-23 MPN/100 mL. Temporally, the maximum FC concentration was 4 MPN/100 mL in low river flow period, while in the period of high river flow, the highest value reached to 23 MPN/100 mL. Spatially, the concentration of FC in high altitude areas was low, while that in the lowland areas was relatively high, which indicated that animal husbandry in high altitude areas contributed little to FC in rivers, and urban domestic sewage and agricultural activities in lowlands were the main pollution sources of FC in rivers. There was no correlation between FC and hardness, electrical conductivity (EC), pH and total organic carbon (TOC) in river water of Kyrgyzstan, and the distribution of FC in high river flow period was mainly driven by population and human modification of terrestrial systems. The results can provide a basis for the prevention and control of surface water FC pollution and related diseases in Kyrgyzstan.
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Affiliation(s)
- Yizhen Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Long Ma
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Yaoming Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Salamat Abdyzhapar Uulu
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Institute of Geology, National Academy of Sciences of Kyrgyzstan, Bishkek, 720461, Kyrgyzstan
| | - Jilili Abuduwaili
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China
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Liu Q, Zhang P, Cheng B, Li Y, Li J, Zhou H, Sun G, Qing J, Zhu Z, Lu Y, Zhao P. Incorporating the life stages of fish into habitat assessment frameworks: A case study in the Baihetan Reservoir. J Environ Manage 2021; 299:113663. [PMID: 34482112 DOI: 10.1016/j.jenvman.2021.113663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 08/27/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
Although it is widely accepted that the construction of dams may alter fish habitats, few studies have followed the life cycles of fish and combined the environmental conditions with the ecological behaviors and habit preferences of fish during reproductive processes to assess its effects of dam construction. In this study, we call for more sophisticated and holistic assessment framework, including effectiveness of technologies intended to mitigate environmental impacts in different life stages. An assessment framework that considers the swimming ability, perception ability of water flow and environmental preference of different fish species during migration, spawning and hatching was proposed. We used the Baihetan Reservoir as an example environment to assess the impoundment effect on the habitat of a tributary upstream of the reservoir. We observed shifts in the habitats of target fish in different life stages which is dominated by reservoir operation of the Baihetan Dam. Combined with the response of fish activities to impoundment, the selection of suitable positions for artificial breeding and release projects and the outlet of the fish transportation system were recommended measures to improve the migration possibilities. Our reassessment results also demonstrated the theoretical possibility and feasibility of joint improvements in spawning and hatching periods using instream structures. Our framework provides a complete set of "assessment-solution" processes for developers and managers to address the aquatic ecological degradation caused by resource development, and its use is strongly recommended for assessments or assessments of damming effects in other regions and on other fish species.
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Affiliation(s)
- Qingyuan Liu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Peng Zhang
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Bixin Cheng
- Shanghai Investigation, Design and Research Institute Corporation Limited, Shanghai, 200434, China
| | - Yong Li
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China.
| | - Jia Li
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Huhai Zhou
- Yangtze River Fisheries Research Institute of Chinese Academy of Fisheries Science, Wuhan, 430223, China
| | - Gan Sun
- China Three Gorges Construction (Group) Co., Ltd., Chengdu, 610041, China
| | - Jie Qing
- Shanghai Investigation, Design and Research Institute Corporation Limited, Shanghai, 200434, China
| | - Zaixiang Zhu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Yun Lu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Pengxiao Zhao
- Hydro-China Huadong Engineering Corporation Limited, Hangzhou, 310014, China
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10
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Yang N, Zhang C, Wang L, Li Y, Zhang W, Niu L, Zhang H, Wang L. Nitrogen cycling processes and the role of multi-trophic microbiota in dam-induced river-reservoir systems. Water Res 2021; 206:117730. [PMID: 34619413 DOI: 10.1016/j.watres.2021.117730] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/25/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
The nitrogen (N) cycle is one of the most important nutrient cycles in river systems, and it plays an important role in maintaining biogeochemical balance and global climate stability. One of the main ways that humans have altered riverine ecosystems is through the construction of hydropower dams, which have major effects on biogeochemical cycles. Most previous studies examining the effects of damming on N cycling have focused on the whole budget or flux along rivers, and the role of river as N sources or sinks at the global or catchment scale. However, so far there is still lack of comprehensive and systematic summarize on N cycling and the controlling mechanisms in reservoirs affected by dam impoundment. In this review, we firstly summarize N cycling processes along the longitudinal riverine-transition-lacustrine gradient and the vertically stratified epilimnion-thermocline-hypolimnion gradient. Specifically, we highlight the direct and indirect roles of multi-trophic microbiota and their interactions in N cycling and discuss the main factors controlling these biotic processes. In addition, future research directions and challenges in incorporating multi-trophic levels in bioassessment, environmental flow design, as well as reservoir regulation and restoration are summarized. This review will aid future studies of N fluxes along dammed rivers and provide an essential reference for reservoir management to meet ecological needs.
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Affiliation(s)
- Nan Yang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, P R China
| | - Chi Zhang
- College of Mechanics and Materials, Hohai University, Xikang Road #1, Nanjing 210098, P R China
| | - Linqiong Wang
- College of Oceanography, Hohai University, Xikang Road #1, Nanjing 210098, P R China
| | - Yi Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, P R China.
| | - Wenlong Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, P R China
| | - Lihua Niu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, P R China
| | - Huanjun Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, P R China
| | - Longfei Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, P R China
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11
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Chen M, Chen H. Spatiotemporal coupling measurement of industrial wastewater discharge and industrial economy in China. Environ Sci Pollut Res Int 2021; 28:46319-46333. [PMID: 34341925 DOI: 10.1007/s11356-021-14743-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 06/01/2021] [Indexed: 06/13/2023]
Abstract
With the industrial-level panel data on total output and wastewater discharge over the period of 1997 to 2018, this paper employs GIS and ESDA methods to empirically investigate the spatial relationship between industrial total output and wastewater discharge. In this paper, we empirically examine whether and how industrial wastewater discharge in a particular province may affect the wastewater discharge in its neighboring provinces. Results suggest that provinces (municipalities) with large-scale industrial sewage discharge are located along riversides and coastal areas and these discharges then gradually distribute to coastal, central, and western areas. Results also show a strong spatial autocorrelation of industrial wastewater discharge between the observed local province and its neighboring provinces which is increasing over time. In addition, there is also a significant spatial spillover effect of industrial wastewater discharge among neighboring provinces in China's eastern and central regions, indicating a structural convergence of high-pollution industries.
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Affiliation(s)
- Ming Chen
- Ginling College, Nanjing Normal University, Nanjing, 210097, China.
- Gulf Coast Research and Education Center, University of Florida, Wimauma, FL, 33598, USA.
| | - Hongquan Chen
- School of Urban Planning, Yancheng Teachers University, Yancheng, 224007, China
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12
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Zhang P, Li K, Liu Q, Liu R, Qin L, Wang H, Zhang Z, Wang K, Wang Y, Liang R, Zhu Z. Linking bait and feeding opportunities to fish foraging habitat for the assessment of environmental flows and river restoration. Sci Total Environ 2021; 768:144580. [PMID: 33736339 DOI: 10.1016/j.scitotenv.2020.144580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/10/2020] [Accepted: 12/12/2020] [Indexed: 06/12/2023]
Abstract
The survival of aquatic biota in different life history stages depends on food availability, water quantity and specific hydrological conditions, and is particularly susceptible in degraded rivers due to the development of hydropower or are sensitive to climate change. Habitats with limited food availability and restricted feeding opportunities can strongly affect the habitat carrying capacity and fish growth with consequences for spawning. Few environmental flow regime frameworks are available that closely link bait and feeding opportunities to fish foraging habitat. In addition, river restoration has been widely implemented to resolve the conflict between ecological demand and power generation benefits. Nevertheless, whether in-stream structures are still suitable for the joint operation of foraging and spawning habitats remains unclear. In this study, a framework to integrate the requirements of both spawning and foraging habitats into environmental flow regime assessments was proposed by coupling the bait supply, fish spawning and fish feeding opportunities. Here, we used the Batang Reservoir, located in the Tibetan Plateau, as an example to determine the environmental flow regimes. The environmental flow regimes during Periods I, II and III for the conservation of the life history stages of Schizothorax dolichonem were determined, which provided high-quality food and was beneficial for increasing the probability of restoration success. After the implementation of measures, the ecological base flow rate decreased from 171.80 m3/s, 206.00 m3/s and 257.70 m3/s to 138.00 m3/s, 206.00 m3/s and 206.00 m3/s in Periods I, II and III, respectively. We concluded that traditional river restoration with the use of in-stream structures is still suitable for the joint operation of spawning and foraging habitats, but the design selection and placement of in-stream structures should be preoptimized. The framework proposed will help managers evaluate habitat conservation to protect degraded rivers or help develop strategies to build resilience to climate change.
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Affiliation(s)
- Peng Zhang
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
| | - Kefeng Li
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
| | - Qingyuan Liu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
| | - Rui Liu
- Power China Northwest Engineering Corporation Limited, Xian 710065, China
| | - Leilei Qin
- China Three Gorges Projects Development Co., Ltd, Chengdu 610042, China
| | - Hongwei Wang
- Sichuan Province Zipingpu Development Corporation Limited, Chengdu 610091, China
| | - Zhiguang Zhang
- Power China Beijing Engineering Corporation Limited, Beijing 100024, China
| | - Kaili Wang
- Sichaun Environment and Engineering Appraisal Center, Chengdu 610041, China
| | - Yuanming Wang
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
| | - Ruifeng Liang
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
| | - Zaixiang Zhu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
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13
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Liu F, Wang Z, Wu B, Bjerg JT, Hu W, Guo X, Guo J, Nielsen LP, Qiu R, Xu M. Cable bacteria extend the impacts of elevated dissolved oxygen into anoxic sediments. ISME J 2021; 15:1551-1563. [PMID: 33479492 PMCID: PMC8114917 DOI: 10.1038/s41396-020-00869-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 11/26/2020] [Accepted: 12/07/2020] [Indexed: 01/30/2023]
Abstract
Profound biogeochemical responses of anoxic sediments to the fluctuation of dissolved oxygen (DO) concentration in overlaying water are often observed, despite oxygen having a limited permeability in sediments. This contradiction is indicative of previously unrecognized mechanism that bridges the oxic and anoxic sediment layers. Using sediments from an urban river suffering from long-term polycyclic aromatic hydrocarbons (PAHs) contamination, we analyzed the physicochemical and microbial responses to artificially elevated DO (eDO) in the overlying water over 9 weeks of incubation. Significant changes in key environmental parameters and microbial diversity were detected over the 0-6 cm sediment depth, along with accelerated degradation of PAHs, despite that eDO only increased the porewater DO in the millimeter subfacial layer. The dynamics of physicochemical and microbial properties coincided well with significantly increased presence of centimeter-long sulfide-oxidizing cable bacteria filaments under eDO, and were predominantly driven by cable bacteria metabolic activities. Phylogenetic ecological network analyses further revealed that eDO reinforced cable bacteria associated interspecific interactions with functional microorganisms such as sulfate reducers, PAHs degraders, and electroactive microbes, suggesting enhanced microbial syntrophy taking advantage of cable bacteria metabolism for the regeneration of SO42- and long-distance electron transfer. Together, our results suggest cable bacteria may mediate the impacts of eDO in anaerobic sediments by altering sediment physiochemical properties and by reinforcing community interactions. Our findings highlight the ecological importance of cable bacteria in sediments.
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Affiliation(s)
- Feifei Liu
- grid.464309.c0000 0004 6431 5677Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070 China
| | - Zhenyu Wang
- grid.464309.c0000 0004 6431 5677Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070 China ,grid.12981.330000 0001 2360 039XSchool of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006 China
| | - Bo Wu
- grid.12981.330000 0001 2360 039XSchool of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006 China
| | - Jesper T. Bjerg
- grid.7048.b0000 0001 1956 2722Center for Electromicrobiology, Department of Biology, Aarhus University, DK-8000 Aarhus, Denmark
| | - Wenzhe Hu
- grid.464309.c0000 0004 6431 5677Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070 China
| | - Xue Guo
- grid.216417.70000 0001 0379 7164Key Laboratory of Biometallurgy of Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083 China ,grid.12527.330000 0001 0662 3178State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084 China
| | - Jun Guo
- grid.464309.c0000 0004 6431 5677Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070 China
| | - Lars Peter Nielsen
- grid.7048.b0000 0001 1956 2722Center for Electromicrobiology, Department of Biology, Aarhus University, DK-8000 Aarhus, Denmark
| | - Rongliang Qiu
- grid.12981.330000 0001 2360 039XSchool of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006 China ,grid.12981.330000 0001 2360 039XGuangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-Sen University, Guangzhou, 510006 China
| | - Meiying Xu
- grid.464309.c0000 0004 6431 5677Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070 China
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14
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Yang S, Liang M, Qin Z, Qian Y, Li M, Cao Y. A novel assessment considering spatial and temporal variations of water quality to identify pollution sources in urban rivers. Sci Rep 2021; 11:8714. [PMID: 33888742 PMCID: PMC8062557 DOI: 10.1038/s41598-021-87671-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 03/24/2021] [Indexed: 11/16/2022] Open
Abstract
It’s vital to explore critical indicators when identifying potential pollution sources of urban rivers. However, the variations of urban river water qualities following temporal and spatial disturbances were highly local-dependent, further complicating the understanding of pollution emission laws. In order to understand the successional trajectory of water qualities of urban rivers and the underlying mechanisms controlling these dynamics at local scale, we collected daily monitoring data for 17 physical and chemical parameters from seven on-line monitoring stations in Nanfeihe River, Anhui, China, during the year 2018. The water quality at tributaries were similar, while that at main river was much different. A seasonal ‘’turning-back” pattern was observed in the water quality, which changed significantly from spring to summer but finally changed back in winter. This result was possibly regulated by seasonally-changed dissolved oxygen and water temperature. Linear mixed models showed that the site 2, with the highest loads of pollution, contributed the highest (β = 0.316, P < 0.001) to the main river City Water Quality Index (CWQI) index, but site 5, the geographically nearest site to main river monitoring station, did not show significant effect. In contrast, site 5 but not site 2 contributed the highest (β = 0.379, P < 0.001) to the main river water quality. Therefore, CWQI index was a better index than water quality to identify potential pollution sources with heavy loads of pollutants, despite temporal and spatial disturbances at local scales. These results highlight the role of aeration in water quality controlling of urban rivers, and emphasized the necessity to select proper index to accurately trace the latent pollution sources.
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Affiliation(s)
- Sihang Yang
- Institute of Public Safety Research, Department of Engineering Physics, Beijing Key Laboratory of City Integrated Emergency Response Science, Tsinghua University, Beijing, China
| | - Manchun Liang
- Institute of Public Safety Research, Department of Engineering Physics, Beijing Key Laboratory of City Integrated Emergency Response Science, Tsinghua University, Beijing, China.
| | - Zesheng Qin
- Environmental Safety Business Division, Beijing GSafety Technology, Co., Ltd., Beijing, China
| | - Yiwu Qian
- Hefei Institute for Public Safety Research, Tsinghua University, Hefei, China
| | - Mei Li
- Hefei Institute for Public Safety Research, Tsinghua University, Hefei, China
| | - Yi Cao
- Hefei Institute for Public Safety Research, Tsinghua University, Hefei, China
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15
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Allen J, Gross EM, Courcoul C, Bouletreau S, Compin A, Elger A, Ferriol J, Hilt S, Jassey VEJ, Laviale M, Polst BH, Schmitt-Jansen M, Stibor H, Vijayaraj V, Leflaive J. Disentangling the direct and indirect effects of agricultural runoff on freshwater ecosystems subject to global warming: A microcosm study. Water Res 2021; 190:116713. [PMID: 33302039 DOI: 10.1016/j.watres.2020.116713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/09/2020] [Accepted: 11/29/2020] [Indexed: 06/12/2023]
Abstract
Aquatic ecosystems are exposed to multiple stressors such as agricultural run-off (ARO) and climate-change related increase of temperature. We aimed to determine how ARO and the frequency of its input can affect shallow lake ecosystems through direct and indirect effects on primary producers and primary consumers, and whether warming can mitigate or reinforce the impact of ARO. We performed a set of microcosm experiments simulating ARO using a cocktail of three organic pesticides (terbuthylazine, tebuconazole, pirimicarb), copper and nitrate. Two experiments were performed to determine the direct effect of ARO on primary producers (submerged macrophytes, periphyton and phytoplankton) and on the grazing snail Lymnaea stagnalis, respectively. Three different ARO concentrations added as single doses or as multiple pulses at two different temperatures (22°C and 26°C) were applied. In a third experiment, primary producers and consumers were exposed together to allow trophic interactions. When functional groups were exposed alone, ARO had a direct positive effect on phytoplankton and a strong negative effect on L. stagnalis. When exposed together, primary producer responses were contrasting, as the negative effect of ARO on grazers led to an indirect positive effect on periphyton. Periphyton in turn exerted a strong control on phytoplankton, leading to an indirect negative effect of ARO on phytoplankton. Macrophytes showed little response to the stressors. Multiple pulse exposure increased the effect of ARO on L. stagnalis and periphyton when compared with the same quantity of ARO added as a single dose. The increase in temperature had only limited effects. Our results highlight the importance of indirect effects of stressors, here mediated by grazers and periphyton, and the frequency of the ARO input in aquatic ecosystems.
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Affiliation(s)
- Joey Allen
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France; Université de Lorraine, CNRS, LIEC, F-57000 Metz, France.
| | | | - Camille Courcoul
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Stéphanie Bouletreau
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Arthur Compin
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Arnaud Elger
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Jessica Ferriol
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Sabine Hilt
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Vincent E J Jassey
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Martin Laviale
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
| | - Bastian H Polst
- Helmholtz-Centre for Environmental Research - UFZ, Dept of Bioanalytical Ecotoxicology, Leipzig, Germany
| | - Mechthild Schmitt-Jansen
- Helmholtz-Centre for Environmental Research - UFZ, Dept of Bioanalytical Ecotoxicology, Leipzig, Germany
| | - Herwig Stibor
- Department of Biology II, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | | | - Joséphine Leflaive
- Laboratoire écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
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16
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Yu L, Liu S, Jiang L, Wang X, Xiao L. Insight into the nitrogen accumulation in urban center river from functional genes and bacterial community. PLoS One 2020; 15:e0238531. [PMID: 32877444 PMCID: PMC7467313 DOI: 10.1371/journal.pone.0238531] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 08/18/2020] [Indexed: 01/26/2023] Open
Abstract
Along with urbanization, the intensified nitrogen pollution in urban rivers and the form of black-odor rivers has become one of the biggest concerns. Better understanding of the nitrogen transformations and microbial mechanisms occurring within urban rivers could help to manage their water quality. In this study, pollution characteristics, potential nitrogen removal rate, composition and function of bacterial community, and abundance of functional genes associated with nitrogen transformation were comparatively investigated in a typical urban river (FC) and a suburban river (LH). Compared with LH, FC was characterized by higher content of nutrients, lower potential nitrogen removal rate and lower abundance of functional genes associated with nitrogen transformation in both overlying water and sediment, especially in summer. Sediment dissolved organic matter characterized by excitation−emission matrix (EEM) showed that FC was more severely polluted by high nitrogen organic matter. Our results revealed that anammox was the main nitrogen removal pathway in both rivers and potential nitrogen removal rates decreased significantly in summer. Bacterial community analysis showed that the benthic communities were more severely influenced by the pollutant than aquatic ones in both rivers. Furthermore, the FC benthic community was dominated by anaerobic respiring, fermentative, sulfate reduction bacteria. Quantitatively, the denitrification rate showed a significant positive correlation with the abundance of denitrification genes, whilst the anammox rate was significantly negatively correlated with bacterial diversity. Meanwhile, NH4+-N had a significant negative correlation to both denitrification and anammox in sediment. Taken together, the results indicated that the increased nitrogen pollutants in an urban river altered nitrogen removal pathways and bacterial communities, which could in turn exacerbate the nitrogen pollution to this river.
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Affiliation(s)
- Lei Yu
- School of the Environment, State Key Laboratory for Pollution Control and Resource Reuse (SKL-PCRR), Nanjing University, Nanjing, China
| | - ShuLei Liu
- School of the Environment, State Key Laboratory for Pollution Control and Resource Reuse (SKL-PCRR), Nanjing University, Nanjing, China
| | - LiJuan Jiang
- School of the Environment, State Key Laboratory for Pollution Control and Resource Reuse (SKL-PCRR), Nanjing University, Nanjing, China
| | - XiaoLin Wang
- School of the Environment, State Key Laboratory for Pollution Control and Resource Reuse (SKL-PCRR), Nanjing University, Nanjing, China
| | - Lin Xiao
- School of the Environment, State Key Laboratory for Pollution Control and Resource Reuse (SKL-PCRR), Nanjing University, Nanjing, China
- * E-mail:
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17
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Zhao CS, Yang Y, Yang ST, Xiang H, Ge YR, Zhang ZS, Zhao Y, Yu Q. Effects of spatial variation in water quality and hydrological factors on environmental flows. Sci Total Environ 2020; 728:138695. [PMID: 32570312 DOI: 10.1016/j.scitotenv.2020.138695] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 04/10/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
Environmental flow is the quantity, timing, and quality of water flows required to sustain freshwater and estuarine ecosystems and the human livelihoods and well-being that depend on these ecosystems. Environmental flows (e-flows) are crucial parameters for ecosystem restoration. Understanding the effects of spatial variation in the hydrological and water quality factors on e-flows aids the determination of recovery prior areas and helps to improve the success rate of ecosystem restoration projects. However, few studies have investigated the effects, which severely hinder the restoration of aquatic ecosystems and the sustainable use of water resources in inland waters. This paper therefore presents a framework for studying such effects. Spatial autocorrelation, a geostatistical method, is used to analyze the spatial variation in the hydrological and water quality factors and to further analyze the effects of various factors on the spatial heterogeneity of e-flows. Four different methods including the Tennant method, wetted perimeter method, AEHRA, and integrated water quality method are integrated to comprehensively evaluate e-flows. The former three methods consider the demands of biota on the streamflow, whereas the latter considers the demands on both the streamflow and the water quality. The results show that the Tennant and wetted perimeter methods, which focus on the statistics of only streamflow, result in similar spatial distribution of e-flows; the AEHRA and integrated water quality method, which consider the effects of water quality and other hydrological factors such as flow velocity and water depth on fish, also result in a similar spatial variation. Consideration of both demands on the hydrological factors and the water quality environmental factors makes the integrated water quality method more practical, particularly in developing regions with excessive pollutant discharge into rivers. In addition, spatial variation in the hydrological and water quality factors influenced the presence of principal fish species and consequently affected the e-flows. Of the 37 water quality factors identified, water transparency had a negative impact on e-flow because the increase in transparency could reduce the number of principal fish species. Of the four hydrological factors, flow velocity and river width had positive impacts on fish because the increase in flow velocity can provide breeding sites and habitats for more fish, respectively, both of which result in increases in the numbers of principal fish species. We found that spatial variation in the hydrology and water quality factors had a profound impact on the living environments of aquatic organisms; negative changes in these factors lowered the survival probability of principal species, which changed the hierarchy and structure of the ecosystems and thus led to variation in e-flows. The results can provide priori knowledge for e-flow methods selection and a reference for ecosystem restoration helping improve the success rate of project elsewhere in the world.
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Affiliation(s)
- C S Zhao
- Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; College of Water Sciences, Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing Normal University, Beijing 100875, PR China; ICube, UdS, CNRS (UMR 7357), 300 Bld Sebastien Brant, CS 10413, 67412 Illkirch, France
| | - Y Yang
- Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; College of Water Sciences, Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing Normal University, Beijing 100875, PR China
| | - S T Yang
- Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; College of Water Sciences, Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing Normal University, Beijing 100875, PR China.
| | - H Xiang
- Jinan Survey Bureau of Hydrology and Water Resources, Jinan 250013, PR China
| | - Y R Ge
- Jinan Survey Bureau of Hydrology and Water Resources, Jinan 250013, PR China
| | - Z S Zhang
- Jinan Survey Bureau of Hydrology and Water Resources, Jinan 250013, PR China
| | - Y Zhao
- Jinan Survey Bureau of Hydrology and Water Resources, Jinan 250013, PR China
| | - Q Yu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, PR China; School of Life Sciences, University of Technology Sydney, Sydney 2000, NSW, Australia
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18
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Wang S, Gu K, Yan C, Guo Z, Zhao P, Zhu WH. POSS: A Morphology-Tuning Strategy To Improve the Sensitivity and Responsiveness of Dissolved Oxygen Sensor. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shuwen Wang
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kaizhi Gu
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chenxu Yan
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhiqian Guo
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ping Zhao
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wei-Hong Zhu
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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