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学者姓名：肖蓉
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Abstract ：
Increasing concerns about public health and safety after covid-19 have raised pathogen studies, especially in aquatic environments. However, the extent to how different location and human activities affect geographic occurrence and distribution of pathogens in response to agricultural pollution, boat tourism disturbances and municipal wastewater inflow in a degraded lake remains unclear. Since the surrounding residents depend on the lake for their livelihood, understanding the pathogens reserved in lake sediment and the regulation possibility by environmental factors are challenges with far-reaching significance. Results showed that 187 pathogens were concurrently shared by the nine sediment samples, with Salmonella enterica and Pseudomonas aeruginosa being the most abundant. The similar composition of the pathogens suggests that lake sediment may act as reservoirs of generalist pathogens which may pose infection risk to a wide range of host species. Of the four virulence factors (VFs) types analyzed, offensive VFs were dominant (>46 % on average) in all samples, with dominant subtypes including adherence, secretion systems and toxins. Notably, the lake sediments under the impact of agricultural use (g1) showed significantly higher diversity and abundance of pathogen species and VFs than those under the impact of boat tourism (g2) and/or municipal wastewater inflow with reed marshes filtration (g3). From the cooccurrence networks, pathogens and pesticides, aggregate fractions, EC, pH, phosphatase have strong correlations. Strong positive correlations between pathogens and diazinon in g1 and ppDDT in g2 and g3 suggest higher pesticide-pathogen co-exposure risk. These findings highlight the need to explore pathogen - environmental factor interaction mechanisms in the human-impacted water environments where the control of pathogen invasion by environmental factors may accessible.
Keyword ：
Metagenome Metagenome Pathogen Pathogen Pesticide Pesticide PHI-base PHI-base Sediment Sediment VFDB VFDB
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| GB/T 7714 | Xiao, Rong , Hu, Yanping , Wang, Yaping et al. Pathogen profile of Baiyangdian Lake sediments using metagenomic analysis and their correlation with environmental factors [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 913 . |
| MLA | Xiao, Rong et al. "Pathogen profile of Baiyangdian Lake sediments using metagenomic analysis and their correlation with environmental factors" . | SCIENCE OF THE TOTAL ENVIRONMENT 913 (2024) . |
| APA | Xiao, Rong , Hu, Yanping , Wang, Yaping , Li, Junming , Guo, Congling , Bai, Junhong et al. Pathogen profile of Baiyangdian Lake sediments using metagenomic analysis and their correlation with environmental factors . | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 913 . |
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Ecological water replenishment is a crucial and effective measure to improve the water quality and ecological function of lakes. However, the effects of ecological water replenishment on the pollution characteristics and ecological risks of trace elements and bacterial communities in lake surface water are still kept unclear. We investigated the pollution levels and potential ecological risks for trace elements, as well as variation of the bacterial community in surface water in the BYD lake before and after ecological water replenishment. Our results revealed that higher levels and pollution indexes (I-geo) of trace metals (e.g., As, Cd, Co, Cu and Ni; p < 0.05) after ecological water replenishment were observed than before ecological water replenishment and their total potential ecological risk (& sum;RI) were increased. In contrast, the network complexity of these trace elements, including nodes, edges, average diameter, modularity, clustering coefficient and average pathlength showed a decrease after ecological water replenishment than before. The diversity (community richness, community diversity and phylogenetic diversity decreased) and community structure of the bacterial community in the surface water (p < 0.05) were greatly changed after ecological water replenishment than before, with the increase in heavy metal-resistant phylum (e.g., Acidobacteriota). Moreover, the concentration of trace elements and & sum;RI were significantly correlated with the alpha diversity of bacterial community, as well as dissolved organic carbon (DOC) and ORP, after ecological water replenishment. The findings indicate that it is very necessary to continuously monitor trace metal pollution levels and heavy metal-resistant phylum and identify their potential pollution sources for water environment control and lake ecosystem health.
Keyword ：
Bacterial community Bacterial community Ecological risks Ecological risks Ecological water replenishment Ecological water replenishment Pollution levels Pollution levels Shallow lake Shallow lake Trace elements Trace elements
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| GB/T 7714 | Zhang, Ling , Bai, Junhong , Zhai, Yujia et al. Pollution levels and potential ecological risks of trace elements in relation to bacterial community in surface water of shallow lakes in northern China before and after ecological water replenishment [J]. | JOURNAL OF CONTAMINANT HYDROLOGY , 2024 , 262 . |
| MLA | Zhang, Ling et al. "Pollution levels and potential ecological risks of trace elements in relation to bacterial community in surface water of shallow lakes in northern China before and after ecological water replenishment" . | JOURNAL OF CONTAMINANT HYDROLOGY 262 (2024) . |
| APA | Zhang, Ling , Bai, Junhong , Zhai, Yujia , Zhang, Kegang , Wang, Yaqi , Tang, Ruoxuan et al. Pollution levels and potential ecological risks of trace elements in relation to bacterial community in surface water of shallow lakes in northern China before and after ecological water replenishment . | JOURNAL OF CONTAMINANT HYDROLOGY , 2024 , 262 . |
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N-cycling processes mediated by microorganisms are directly linked to the eutrophication of lakes and ecosystem health. Exploring the variation and influencing factors of N-cycling-related genes is of great significance for controlling the eutrophication of lakes. However, seasonal dynamics of genomic information encoding nitrogen (N) cycling in sediments of eutrophic lakes have not yet been clearly addressed. We collected sediments in the Baiyangdian (BYD) Lake in four seasons to explore the dynamic variation of N-cycling functional genes based on a shotgun metagenome sequencing approach and to reveal their key influencing factors. Our results showed that dissimilatory nitrate reduction (DNRA), assimilatory nitrate reduction (ANRA), and denitrification were the dominant N-cycling processes, and the abundance of nirS and amoC were higher than other functional genes by at least one order of magnitude. Functional genes, such as nirS, nirK and amoC, generally showed a consistent decreasing trend from the warming season (i.e., spring, summer, fall) to the cold season (i.e., winter). Furthermore, a significantly higher abundance of nitrification functional genes (e.g., amoB, amoC and hao) in spring and denitrification functional genes (e.g., nirS, norC and nosZ) in fall were observed. N-cycling processes in four seasons were influenced by different dominant environmental factors. Generally, dissolved organic carbon (DOC) or sediment organic matter (SOM), water temperature (T) and antibiotics (e.g., Norfloxacin and ofloxacin) were significantly correlated with N-cycling processes. The findings imply that sediment organic carbon and antibiotics may be potentially key factors influencing N-cycling processes in lake ecosystems, which will provide a reference for nitrogen management in eutrophic lakes.
Keyword ：
functional genes functional genes N-cycling N-cycling seasonal changes seasonal changes sediments sediments shallow lake shallow lake
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| GB/T 7714 | Zhang, Ling , Bai, Junhong , Zhai, Yujia et al. Seasonal changes in N-cycling functional genes in sediments and their influencing factors in a typical eutrophic shallow lake, China [J]. | FRONTIERS IN MICROBIOLOGY , 2024 , 15 . |
| MLA | Zhang, Ling et al. "Seasonal changes in N-cycling functional genes in sediments and their influencing factors in a typical eutrophic shallow lake, China" . | FRONTIERS IN MICROBIOLOGY 15 (2024) . |
| APA | Zhang, Ling , Bai, Junhong , Zhai, Yujia , Zhang, Kegang , Wang, Yaqi , Tang, Ruoxuan et al. Seasonal changes in N-cycling functional genes in sediments and their influencing factors in a typical eutrophic shallow lake, China . | FRONTIERS IN MICROBIOLOGY , 2024 , 15 . |
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Although the combined pollution of trace elements and antibiotics has received extensive attention, the fate and toxicity risk of trace elements with high antibiotic risk are still unclear. The multimedia distributions, partitioning, sources, toxicity risks and co -occurrence network characteristics of trace elements in surface water (SW), overlying water (OW), pore water (PW) and sediment (Sedi) samples of 61 sites from Baiyangdian (BYD) Lake were investigated. The trace elements in the SW and OW are derived mainly from traffic and agricultural sources, and those in PW and Sedi samples are primarily from lithogenic and industrial sources. The total toxicity risk index (TRI) of nine trace elements (sigma TRI) in Sedi samples showed a very high toxicity risk (18.35 +/- 8.84), and a high combined pollution toxicity risk (sigma sigma TRI) was observed in PW (149.17 +/- 97.52) and Sedi samples (46.37 +/- 24.00). The co -occurrence network from SW to PW became more vulnerable. Generally, total antibiotics and TP may be keystones of trace elements in water and sediment. The high antibiotic risk significantly influenced sigma sigma TRI in water samples but not in Sedi samples. The findings provide new implications for the monitoring and control of combined antibiotic -trace element pollution in shallow lakes.
Keyword ：
Antibiotic risk Antibiotic risk Multimedia partitioning Multimedia partitioning Shallow lake Shallow lake Toxicity risk Toxicity risk Trace elements Trace elements
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| GB/T 7714 | Zhang, Ling , Bai, Junhong , Zhai, Yujia et al. Multimedia distribution, partitioning, sources, comprehensive toxicity risk and co-occurrence network characteristics of trace elements in a typical Chinese shallow lake with high antibiotic risk [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 465 . |
| MLA | Zhang, Ling et al. "Multimedia distribution, partitioning, sources, comprehensive toxicity risk and co-occurrence network characteristics of trace elements in a typical Chinese shallow lake with high antibiotic risk" . | JOURNAL OF HAZARDOUS MATERIALS 465 (2024) . |
| APA | Zhang, Ling , Bai, Junhong , Zhai, Yujia , Zhang, Kegang , Wang, Yaqi , Tang, Ruoxuan et al. Multimedia distribution, partitioning, sources, comprehensive toxicity risk and co-occurrence network characteristics of trace elements in a typical Chinese shallow lake with high antibiotic risk . | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 465 . |
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Despite the serious health threats due to wide use of organophosphorus pesticides (OPPs) have been experimentally claimed to be remediated by probiotic microorganisms in various food and organism models, the interactions between OPPs and probiotics in the natural wetland ecosystem was rarely investigated. This study delves into the spatial and temporal distribution, contamination levels of OPPs in the Baiyangdian region, the diversity of probiotic communities in varying environmental contexts, and the potential connection with OPPs on these probiotics. In typical shallow lake wetland ecosystem-Baiyangdian lake in north China, eight OPPs were identified in the lake sediments, even though their detection rates were generally low. Malathion exhibited the highest average content among these pesticides (9.51 ng/g), followed by fenitrothion (6.70 ng/g). Conversely, chlorpyrifos had the lowest detection rate at only 2.14%. The region near Nanliu Zhuang (F10), significantly influenced by human activities, displayed the highest concentration of total OPPs (136.82 ng/g). A total of 145 probiotic species spanning 78 genera were identified in Baiyangdian sediments. Our analysis underscores the relations of environmental factors such as phosphatase activity, pH, and electrical conductivity (EC) with probiotic community. Notably, several high-abundance probiotics including Pseudomonas chlororaphis, Clostridium sp., Lactobacillus fermentum, and Pseudomonas putida, etc., which were reported to exhibit significant potential for the degradation of OPPs, showed strongly correlations with OPPs in the Baiyangdian lake sediments. The outcomes of this research offer valuable insights into the spatiotemporal dynamics of OPPs in natural large lake wetland and the probability of their in-situ residue bioremediation through the phosphatase pathway mediated by probiotic such as Lactic acid bacteria in soils/sediments contaminated with OPPs.
Keyword ：
Baiyangdian Lake Baiyangdian Lake Organophosphorus pesticides Organophosphorus pesticides Potential correlation Potential correlation Probiotic communities Probiotic communities Sediment Sediment
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| GB/T 7714 | Hu, Yanping , Xiao, Rong , Wang, Yaping et al. Distribution of organophosphorus pesticides and its potential connection with probiotics in sediments of a shallow freshwater lake [J]. | JOURNAL OF CONTAMINANT HYDROLOGY , 2024 , 261 . |
| MLA | Hu, Yanping et al. "Distribution of organophosphorus pesticides and its potential connection with probiotics in sediments of a shallow freshwater lake" . | JOURNAL OF CONTAMINANT HYDROLOGY 261 (2024) . |
| APA | Hu, Yanping , Xiao, Rong , Wang, Yaping , Li, Junming , Guo, Congling , Bai, Junhong et al. Distribution of organophosphorus pesticides and its potential connection with probiotics in sediments of a shallow freshwater lake . | JOURNAL OF CONTAMINANT HYDROLOGY , 2024 , 261 . |
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Antibiotics and herbicides are contaminants of emerging concern in aquatic environments. Lake Villarrica is a relevant freshwater body in Chile and was recently designated a 'saturated nutrient zone '. Here, we investigated the occurrence of multiple antibiotic resistance (MAR) and herbicide catabolic profiles among bacteria present in the surface sediments of Lake Villarrica. The occurrence of antibiotic-resistant genes (ARGs; bla TEM, cat A and tet M) and herbicide-catabolic genes (HCGs; phn J and atzA ) was investigated by qPCR. Subsequently, the presence of culturable bacteria with multiple resistance to amoxicillin (AMX), chloramphenicol (CHL) and oxytetracycline (OXT) was studied. Forty-six culturable MAR (AMX + CHL + OXT) strains were isolated and characterized with respect to their resistance to 11 antibiotics by using a disc diffusion assay and testing their ability to use herbicides as a nutrient source. qPCR analyses revealed that ARGs and HCGs were present in all sediment samples (10 1 to 10 3 gene copies g-1 ), with significant ( P <= 0.05) higher values in sites near Villarrica city and cattle pastures. The plate method was used to recover MAR isolates from sediment (10 3 -10 6 CFU g-1 ), and most of the 46 isolates also showed resistance to oxacillin (100%), cefotaxime (83%), erythromycin (96%) and vancomycin (93%). Additionally, 54 and 57% of the MAR isolates were able to grow on agar supplemented (50 mg L-1 ) with atrazine and glyphosate as nutrient sources, respectively. Most of the MAR isolates were taxonomically close to Pseudomonas (76.1%) and Pantoea (17.4%), particularly those isolated from urbanized sites (Puc on city). This study shows the presence of MAR bacteria with herbicide catabolic activity in sediments, which is valuable for conservation strategies and risk assessments of Lake Villarrica. However, major integrative studies on sediments as reservoirs or on the fate of MAR strains and traces of antibiotics and herbicides as a result of anthropic pressure are still needed.
Keyword ：
eutrophication eutrophication Freshwater ecosystems Freshwater ecosystems Multidrug resistance Multidrug resistance Organic pollutants Organic pollutants Pesticides Pesticides Quantitative PCR Quantitative PCR
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| GB/T 7714 | Jorquera, Milko A. , Acuna, Jacquelinne J. , Huerta, Nicole et al. Multiple antibiotic resistance and herbicide catabolic profiles of bacteria isolated from Lake Villarrica surface sediments (Chile) [J]. | ENVIRONMENTAL POLLUTION , 2024 , 358 . |
| MLA | Jorquera, Milko A. et al. "Multiple antibiotic resistance and herbicide catabolic profiles of bacteria isolated from Lake Villarrica surface sediments (Chile)" . | ENVIRONMENTAL POLLUTION 358 (2024) . |
| APA | Jorquera, Milko A. , Acuna, Jacquelinne J. , Huerta, Nicole , Bai, Junhong , Zhang, Ling , Xiao, Rong et al. Multiple antibiotic resistance and herbicide catabolic profiles of bacteria isolated from Lake Villarrica surface sediments (Chile) . | ENVIRONMENTAL POLLUTION , 2024 , 358 . |
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Diazinon is an organophosphorus pesticide widely used in agriculture and household pest control, and its use also poses several environmental and health hazards. In this study, we investigated the spatial and temporal distribution of diazinon in Baiyangdian, evaluated its potential ecological risk and toxicity to aquatic organisms based on RQ (Risk quotient) and TU (Toxic unit) analysis, and assessed the potential effects of diazinon accumulation on probiotics and pathogens based on statistical analysis of high-throughput sequencing data. The results showed that diazinon in Baiyangdian posed a low to moderate chronic risk to sediment-dwelling organisms and a low toxicity effect on aquatic invertebrates, which was mainly concentrated in October and human-intensive areas. Meanwhile, increases in sediment electrical conductivity (EC), amorphous iron oxides content and phenol oxidase activity favored diazinon accumulation in sediments, whereas the opposite was the case for sediment organic carbon, beta-1,4-glucosidase, phosphatase, catalase and pH, suggesting that environmental indicators play a key role in the behavior and distribution of diazinon. In addition, diazinon in heavily contaminated areas seem to inhibit the rare probiotics (Bifidobacterium adolescentis and Serratia sp.), while promoted dominant pathogens (e. g., Burkholderia cenocepacia), which can lead to increased disease risk to humans and ecosystems, disruption of ecological balance and potential health problems. However, probiotic Streptomyces xiamenensis resist to diazinon would be a potential degrader for diazinon remove. In conclusion, this study unveiled the effects of diazinon pollution on wetland ecosystems, emphasizing ecological impacts and potential health concerns. In addition, the discovery of diazinon resistant probiotics provided new insights into wetland ecological restoration.
Keyword ：
Diazinon Diazinon Ecological risk assessment Ecological risk assessment Pathogens Pathogens Probiotics Probiotics Sediment properties Sediment properties
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| GB/T 7714 | Wang, Yaping , Xiao, Rong , Hu, Yanping et al. Accumulation and ecological risk assessment of diazinon in surface sediments of Baiyangdian lake and its potential impact on probiotics and pathogens [J]. | ENVIRONMENTAL POLLUTION , 2024 , 357 . |
| MLA | Wang, Yaping et al. "Accumulation and ecological risk assessment of diazinon in surface sediments of Baiyangdian lake and its potential impact on probiotics and pathogens" . | ENVIRONMENTAL POLLUTION 357 (2024) . |
| APA | Wang, Yaping , Xiao, Rong , Hu, Yanping , Li, Junming , Guo, Congling , Zhang, Ling et al. Accumulation and ecological risk assessment of diazinon in surface sediments of Baiyangdian lake and its potential impact on probiotics and pathogens . | ENVIRONMENTAL POLLUTION , 2024 , 357 . |
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| GB/T 7714 | Hu, Yanping , Xiao, Rong , Wang, Yaping et al. Distribution of organophosphorus pesticides and its potential connection with probiotics in sediments of a shallow freshwater lake( vol 261, 104306, 2024) [J]. | JOURNAL OF CONTAMINANT HYDROLOGY , 2024 , 266 . |
| MLA | Hu, Yanping et al. "Distribution of organophosphorus pesticides and its potential connection with probiotics in sediments of a shallow freshwater lake( vol 261, 104306, 2024)" . | JOURNAL OF CONTAMINANT HYDROLOGY 266 (2024) . |
| APA | Hu, Yanping , Xiao, Rong , Wang, Yaping , Li, Junming , Guo, Congling , Zhang, Ling et al. Distribution of organophosphorus pesticides and its potential connection with probiotics in sediments of a shallow freshwater lake( vol 261, 104306, 2024) . | JOURNAL OF CONTAMINANT HYDROLOGY , 2024 , 266 . |
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| GB/T 7714 | Xiao, Rong , Hu, Yanping , Wang, Yaping et al. Pathogen profile of Baiyangdian Lake sediments using metagenomic analysis and their correlation with environmental factors( vol 913 , 169628 , 2024) [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 937 . |
| MLA | Xiao, Rong et al. "Pathogen profile of Baiyangdian Lake sediments using metagenomic analysis and their correlation with environmental factors( vol 913 , 169628 , 2024)" . | SCIENCE OF THE TOTAL ENVIRONMENT 937 (2024) . |
| APA | Xiao, Rong , Hu, Yanping , Wang, Yaping , Li, Junming , Guo, Congling , Zhang, Ling et al. Pathogen profile of Baiyangdian Lake sediments using metagenomic analysis and their correlation with environmental factors( vol 913 , 169628 , 2024) . | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 937 . |
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Surface sediments were collected to investigate the pollution levels and ecological risks of heavy metals (e.g., As, Ni, Pb, Cu, Zn, Cr, Cd, and Mn) in the surface sediments covered by emerged and submerged plants in the main areas of the Baiyangdian Lake. The results showed that Pb and Cd highly exceeded the background values of Hebei Province and had high pollution levels, while other heavy metals exhibited no pollution. With the exception of Mn, there was no significant difference in the concentrations of heavy metals in surface sediments between the emerged-plant and submerged-plant zones. The concentrations of heavy metals in Zaolinzhuang were relatively low, while those in Wangjiazhai, Nanliuzhuang and Shaochedian were relatively high. In the two plant zones, Cd in surface sediments posed a considerable risk at all sampling sites regardless of plant zones, followed by Pb with light pollution level. Correlation analysis and factor analysis results showed that all these heavy metals generally originated from three different sources in both plant zones, of which As, Cu and Zn had two sources in the emerged plant zones. Our findings indicate that Cd and Pb pollution of the Baiyangdian Lake should be given more attention to contribute to the environmental control and ecosystem conservation of the lake.
Keyword ：
Ecological risk Ecological risk Geo-accumulation index Geo-accumulation index Heavy metals Heavy metals Shallow lake Shallow lake Source identification Source identification
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| GB/T 7714 | Liu, Haizhu , Bai, Junhong , Zhang, Kegang et al. Heavy metal pollution and ecological risk assessment of surface sediments covered by emerged and submerged plants in a shallow lake [J]. | ECOHYDROLOGY & HYDROBIOLOGY , 2024 , 24 (4) : 849-856 . |
| MLA | Liu, Haizhu et al. "Heavy metal pollution and ecological risk assessment of surface sediments covered by emerged and submerged plants in a shallow lake" . | ECOHYDROLOGY & HYDROBIOLOGY 24 . 4 (2024) : 849-856 . |
| APA | Liu, Haizhu , Bai, Junhong , Zhang, Kegang , Wang, Chen , Liang, Jinfeng , Zhang, Ling et al. Heavy metal pollution and ecological risk assessment of surface sediments covered by emerged and submerged plants in a shallow lake . | ECOHYDROLOGY & HYDROBIOLOGY , 2024 , 24 (4) , 849-856 . |
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