Journal of Environmental Sciences
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2023
·
IF 6.9
ShuaiLong Wen,JingJing Liu,YueHan Lu,JiaRu Dai,XiuLin Huang,ShiLin An,Erik Jeppesen,ZhengWen Liu,YingXun Du
Dissolved organic matter (DOM) is heterogeneous and exhibits diverse adsorption characteristics with or without the competition of phosphorous (P). Uncertainty persists on how these affect the burial and mobilization of organic carbon and P in aquatic ecosystems. In this work, an algae-derived DOM (ADOM) and a commercial humic acid (HA) with distinct composition were assessed for their adsorption behaviors on iron (oxy)hydroxides (FeOx), in the absence and presence of phosphate. ADOM has less aromatics than HA but more protein-like and highly unsaturated structures with oxygen compounds (HUSO). The adsorption capacity of FeOx was significantly greater for ADOM than for HA. Protein-like and HUSO compounds in ADOM and humic-like compounds and macromolecular aromatics in HA were preferentially adsorbed by FeOx. Moreover, ADOM demonstrated a stronger inhibitory effect on phosphate adsorption than that of HA. This observation suggests that substantial autochthonous ADOM released by algae could increase the internal P loading and difficulty to restore eutrophic lakes. In contrast, phosphate competition can also fractionate ADOM, which suppressing the adsorption of protein-like compounds in ADOM onto FeOx, resulting in an increase in their relative abundance in the post-adsorption ADOM, while reducing the abundance of humic-like compounds. However, phosphate had no discernible impact on the compositional fractionation of HA. Collectively, our results show the source-compositions of DOM influence the immobilization of both DOM and P in aquatic ecosystem via adsorption. The preferential adsorption of proteinaceous compounds in ADOM and aromatics in HA highlighted that the attachment with FeOx could remove their source-specific signatures, partly contributing to universal DOM characteristics across aquatic environments.
研究领域:
环境科学
·
水生生态学
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DOI
高影响因子
Journal of Oceanology and Limnology
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2023
·Vol. 41
·期 5
·1965-1977
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IF 1.6
Liu Yan,Kociolek John Patrick,Kulikovskiy Maxim,Glushchenko Anton,Yu Pan,Wang Quanxi,Lu Xinxin,Fan Yawen
An interesting group of cymbelloid diatoms was collected from lakes in Yunnan Province, China, and observations on their valve morphology made using light and scanning electron microscopy. These cymbelloid species all have apical pore fields, slit-like areolae, and areolar occlusions, and they all lack of stigmata. In this paper we propose the new genus Qinia gen. nov. for these taxa and describe them as new: Q. lashii sp. nov., Q. aequalis sp. nov., and Q. daliensis sp. nov. The genus Qinia gen. nov. has lanceolate valves asymmetrical about their apical axes, raphe located in the middle of valve, distal raphe ends bent to the dorsal margin that bisects the apical pore fields (APFs), no stigmata, areolae with slit-like external openings and projections occluding the areolar openings internally. This genus resembles the genus Cymbella in the presence of APFs, but differs from Cymbella by a lack of stigmata, and by having external distal raphe ends that bisect the apical pore fields. Like Reimeria , the external distal raphe ends bisect the lobes of the APF, but Qinia species differ from Reimeria in that they have no stigmata and the distal raphe ends are deflected dorsally, not ventrally. Comparisons were made between Qinia and other cymbelloid genera whose members possess apical pore fields. Features that distinguish each species of the new genus are also discussed.
研究领域:
植物分类学
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淡水生态学
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藻类生物学
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形态学
·
系统发育研究
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 47
·57645-57654
·
IF 0
Li Chengfu,Wu Ligui,Zou Xiaoming,Wu Qiaofeng,Mo Yuanmin
Antibiotics are increasingly found in urban lakes, posing significant ecological risks to lake ecosystems. The impact of sponge city facilities on urban flood control is significant; however, their influence on the exposure characteristics and risks associated with antibiotics in urban inland lakes remains unclear. This study investigated the exposure characteristics and evaluated the ecological risks of 15 antibiotics across seven lakes of Fuzhou (as the target of sponge city) in different seasons, in comparison to non-sponge cities. The results revealed that 12 antibiotics were consistently detectable across all lakes, with concentrations ranging from non-detectable (ND) to 20.61 ng/L, with sulfamethoxazole (SMX) emerging as the predominant contaminant. Most antibiotics exhibited higher concentrations in the dry season, attributed to environmental conditions, biological mechanisms, and their physicochemical properties. SMX, tetracycline (TTC), oxytetracycline (OTC), and ciprofloxacin (CIP) posed moderate to high ecological risks, with risk quotient (RQ) values of 0.46, 0.14, 0.17, and 0.61, respectively, while the remaining antibiotics presented lower ecological risks in both seasons. Notably, the RQ values for TTC, OTC, and CIP were elevated during the dry season, whereas SMX displayed a higher RQ value in the wet season, indicating an increased ecological risk during the dry months. In comparison to non-sponge cities, sponge cities exhibited significantly lower concentrations of nearly all antibiotics, particularly during the wet season ( p ≤ 0.05). Moreover, over 85% of the antibiotics in non-sponge cities were classified as high risk, contrasted with only 55% in sponge cities, underscoring the heightened ecological risks associated with non-sponge urban designs. This study provides critical insights for controlling antibiotic pollution in the lakes of Fuzhou and serves as a valuable reference for maintaining aquatic ecosystem health through the implementation of sponge city infrastructure. Graphical abstract
研究领域:
环境科学
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生态学
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DOI
PubMed
CHEMOSPHERE
·
2021
·
IF 7.086
Zhenkai He,Xinyu Wang,Yunhe Luo,Yazheng Zhu,Xin Lai,Jingge Shang,Jianqiu Chen,Qianjiahua Liao
Coagulation is a common method used to remove suspended particulate matter (SPM) from the water supply. SPM has preferable adsorption ability for antibiotics in water; therefore, SPM adsorption and coagulation may be a possible way to remove tetracycline (TC) from water. This study carried out coagulation experiments combining SPM collected from a natural lake at a location with three common coagulants—polyaluminum sulfate, polyaluminum chloride, and polyferric sulfate—under different pH values, exploring the adsorption of TC by SPM, coagulation of SPM with TC, and the primary influencing factors of this process. The maximum removal rate of TC can reach 97.87% with an SPM concentration of 1000 mg/L. Multi-factor analysis of variance showed the importance of various TC removal factors, which were ranked as follows: SPM concentration ≫ initial TC concentration > type of coagulant > pH values. The higher the SPM concentration, the better the TC removal (p < 0.001). Fourier infrared spectroscopy results demonstrated the strong adsorption effect of SPM on TC after being combined with a coagulant, and scanning electron microscopy also indicated that SPM becomes effective nuclei in the coagulation process, which is a possible reason for better TC removal. However, the effluent turbidities under 1000 mg/L SPM concentrations were high without coagulant aid. With the addition of coagulant aid anion polyacrylamide, the TC removal remained unchanged, effluent turbidity significantly reduced, and the TC desorption became low. These results indicate that applying SPM from natural lakes in the coagulation process could potentially remove TC in water.
研究领域:
环境科学
·
水处理工程
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DOI
PubMed
高影响因子
ACS ES&T Water
·
2025
·
IF 4.3
Yingru Tao,Weiying Feng,Qiwei Gu,Tengke Wang,Fanhao Song,Tingting Li
Microbial communities serve as crucial mediators of dissolved organic matter (DOM) dynamics in seasonally ice-covered lakes. This comparative study of a saline plateau lake (Lake Daihai) and an eutrophic freshwater lake (Lake Wuliangsuhai) revealed distinct winter microbial patterns, with sediment communities exhibiting 2–3 times higher diversity than ice or water habitats. Fluorescence characterization identified fundamental differences in DOM sources, where saline lake DOM showed mixed terrestrial-autochthonous signatures (fluorescence index: 1.4–1.9), contrasting with the strongly microbial-derived DOM (FI > 1.9) in freshwater systems. Vertical profiling demonstrated progressive humification downward through ice layers, while microbial functional predictions indicated sustained amino acid metabolism despite subzero temperatures. The unique halotolerant community structure of the saline lake contrasted sharply with the psychrophilic Flavobacterium-dominated assemblages in freshwater habitats, reflecting differential adaptation to environmental stressors. Dissolved oxygen and salinity emerged as primary drivers of community composition, while phosphorus availability influenced specific functional groups involved in organic matter processing. These findings highlight the resilience of microbial-mediated carbon cycling under ice cover and provide critical baseline data for predicting ecosystem responses to changing winter conditions in inland waters.
研究领域:
生态学
·
环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Congcong He,Zhiming Yin,Jun He,Jungang Lv,Chengjun Wang
The occurrence and distribution of typical estrogenic and androgenic steroid hormones including estrone, 17β-estradiol, estriol, 17α-ethynylestradiol and testosterone in surface water from nine lakes across the Wuhan City, China were investigated. The concentrations of studied steroids in surface water samples from different lakes were ranged from less than detection limits to hundreds nanomolarity and there were significant positive correlations among the concentrations of target steroids, indicating that these chemicals have the common sources and similar environmental behavior. Detection frequencies and abundance of steroids in lakes located in residential area were generally higher than those in remote lakes, and the levels of detected steroids in the identical lake varied in sampling locations with the highest concentration being observed around outlet of wastewater effluent. All these results indicated that anthropogenic factors play important roles in steroids contamination in urban surface water. Photodegradation data of the steroid hormones in natural lake water and deionized water demonstrated that only indirect photosensitive decomposition of steroids occurred in real lake surface water under simulated sunlight irradiation. Reactive species characterization and quenching experimental results revealed that photo-generated triplet 3 DOM* , • OH and 1 O 2 contribute to the indirect degradation of steroids in natural lake water. This study provided important reference for better understanding the sources and transformation of steroid hormones in urban lake surface water.
研究领域:
环境科学
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生态学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
ShuaiLong Wen,YueHan Lu,ChunYan Luo,ShiLin An,JiaRu Dai,ZhengWen Liu,JiCheng Zhong,YingXun Du
Humic acid (HA) and phosphate interactions play a vital role in the biogeochemical cycle of carbon and nutrients and thus the trophic state of a lake. The adsorption behavior of HAs to sediments in the absence and presence of phosphate was investigated in this study. Three types of HAs were used, AHA from algae-dominated lake sediments , MHA from macrophyte-dominated lake sediments, and a reference HA (RHA) with terrestrial sources. The adsorption capacity of lake sediments was highest for AHA, which can be explained by that AHA contained more carboxyl-containing molecules, proteinaceous compounds and polysaccharides that were preferentially adsorbed by minerals. Phosphate showed a stronger inhibitory effect on MHA adsorption than on AHA adsorption, suggesting that AHA can more effectively replace phosphate adsorbed to sediments. Our findings show that the functional groups of organic compounds control not only their fractionation and burial but also their ability to replace phosphate in sediments. We propose a novel mechanism to explain the legacy effect of lake eutrophication . That is, as lakes shift from a macrophyte-dominated state to more eutrophic, algae-dominated state, increasing algae-derived organic compounds can promote the release of phosphate from sediments, forming a positive feedback loop that sustains internal phosphorus loading and hence lake eutrophication.
研究领域:
环境科学
·
生态学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Shujun Yin,Yafang Liu,Chenhui Wei,Dongqiang Zhu
Freshwater lakes serve as active conduits for processing terrestrial dissolved organic matter (DOM), playing a crucial role in global carbon cycle . Little attention has been paid to how hydrological connectivity to a large river would affect the molecular signatures of DOM in lakes. Here, we systematically characterized and compared the molecular signatures of DOM in surface waters of four large freshwater lakes in the middle and lower Changjiang River basin that are directly connected to the river (Lake Dongting and Lake Poyang, referred to as Lake connected ) or indirectly connected to the river (Lake Chao and Lake Tai, referred to as Lake nonconnected ). The DOM in Lake connected was found to have similar total organic carbon (TOC)-normalized contents and characteristics of lignin phenols to the DOM in surface waters from the upstream Changjiang river, indicating allochthonous/terrestrial sources from riverine inputs. As indicated by the UV–vis and fluorescence analyses, the DOM in Lake connected overall had higher aromaticity and larger average molecular weight as well as stronger allochthonous feature compared to the DOM in Lake nonconnected . Consistently, the FT-ICR MS analysis revealed that the DOM in Lake connected had higher molecular diversity, higher unsaturation degree, and larger proportions of highly aromatic compounds. In contrast, the DOM in Lake nonconnected had larger proportions of lipids and peptide-like structures, but lower proportions of aromatic compounds, which could be ascribed to the enhanced autochthonous production and photodegradation due to pollution and eutrophication as well as longer water residence time. The results highlight the strong impacts of the hydrological connectivity to a large river on the molecular signatures of lake DOM. Capsule The hydrological connectivity of the lakes to the Changjiang River has strong impacts on the molecular signatures of lake DOM.
研究领域:
生态学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 15
·15084-15094
·
IF 2.914
Yao Zongbao,Wang Fang,Wang Chunliu,Xu Huacheng,Jiang Helong
Anaerobic ammonium oxidation coupled to ferric iron reduction (Feammox) has been assumed to play an important role in nitrogen removal from ecosystems. This study assessed the potential role of Feammox in nitrogen transformation in eutrophic lake sediment using an isotope tracing technique in sediment slurry incubation experiments. Feammox was discovered in eutrophic lake sediment. A significant correlation was found between Feammox rates and iron-reducing rates. Furthermore, the positive correlations between the abundance of iron-reducing bacteria (FeRB), such as Geobacteraceae spp. and Shewanella spp., and Feammox rates indicate that Feammox was mediated by FeRB. The potential rate of Feammox in the isotopic tracer incubation treatment was 0.23–0.43 mg N kg −1 day −1 . The estimated nitrogen loss caused by Feammox accounts for 5.0–9.2% of the human-induced N input annually into the eutrophic lake. Feammox alone or coupled with anaerobic ammonium oxidation (anammox) and/or denitrification may have an essential role in the nitrogen cycle within eutrophic lake sediment.
研究领域:
微生物学
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环境科学
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Jikang You,Fei Liu,Yongwu Wang,Chongsen Duan,Lu Zhang,Huishan Li,Junjian Wang,Huacheng Xu
Lingering inconsistencies in the global methane (CH 4 ) budget and ambiguity in CH 4 sources and sinks triggered efforts to identify new CH 4 formation pathways in natural ecosystems. Herein, we reported a novel mechanism of light-induced generation of hydroxyl radicals (•OH) that drove the production of CH 4 from aquatic dissolved organic matters (DOMs) under ambient conditions. A total of five DOM samples with different origins were applied to examine their potential in photo-methanification production under aerobic conditions, presenting a wide range of CH 4 production rates from 3.57 × 10 −3 to 5.90 × 10 −2 nmol CH 4 mg-C −1 h −1 . Experiments of •OH generator and scavenger indicated that the contribution of •OH to photo-methanificaiton among different DOM samples reached about 4∼42 %. In addition, Fourier transform infrared spectroscopy and Fourier transform ion cyclotron resonance mass spectrometry showed that the carbohydrate- and lipid-like substances containing nitrogen-bonded methyl groups, methyl ester, acetyl groups, and ketones, were the potential precursors for light-induced CH 4 production. Based on the experimental results and simulated calculations, the contribution of photo-methanification of aquatic DOMs to the diffusive CH 4 flux across the water-air interface in a typical eutrophic shallow lake (e.g., Lake Chaohu) ranged from 0.1 % to 18.3 %. This study provides a new perspective on the pathways of CH 4 formation in aquatic ecosystems and a deeper understanding on the sources and sinks of global CH 4 .
研究领域:
环境科学
·
生态学
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DOI
PubMed
高影响因子
NORTH AMERICAN JOURNAL OF AQUACULTURE
·
2018
·Vol. 80
·期 4
·436-446
·
IF 0.737
Wentong Xia,Xiao Qu,Yingxue Zhang,Rui Wang,Wei Xin,Chuanbo Guo,Jim Bowker,Yushun Chen
Fish culture in lakes is an important component of aquaculture in some countries, but little is known about its impact on the ecosystem of the impacted lake. In summer 2015, we measured concentrations of 11 heavy metals, including copper (Cu), zinc (Zn), lead (Pb), arsenic (As), and manganese (Mn), in water and sediment from 23 lakes of different aquaculture classifications in the middle reach of the Yangtze River basin, China. These lakes represented the following four lake aquaculture management strategies: fish ranching in lakes classified as receiving low (LOW; used for backup drinking water and irrigation), medium (MEDIUM), or high (HIGH; fish fed commercial feed) stocking rates or as fallow (FALLOW), in which previously ranched HIGH lakes had not been stocked for 2 years. Results showed a positive relationship between most heavy metal concentrations and fish culture intensity. Concentrations of Cu, Zn, and aluminum (Al) in the water column were significantly greater in the HIGH lakes than in the LOW lakes. Heavy metals in the FALLOW lakes did not appear to fully recover from past aquaculture activities. In sediment, the concentration of As in LOW lakes was significantly lower than those in MEDIUM and HIGH lakes, whereas no among-group significant differences in the other heavy metal concentrations were detected. Metals in sediments of all four lake types were at the low ecological risk level. We speculate that these results may be applied to lakes in other regions globally with similar fish stocking and management strategies.
研究领域:
生态学
·
环境科学
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DOI
高影响因子
Frontiers in Microbiology
·
2024
·
IF 4
Xiao Yao,Du Mijia,Deng Yang,Deng Qinglin,Wang Xin,Yang Yiwen,Zhang Binghuo,Zhang Yu-Qin
Harmful algal blooms (HABs) in natural waters are of escalating global concern due to their detrimental impact on environmental health. Emerging evidence indicates that algae-bacteria symbionts can affect HAB features, though much about this interplay remains largely unexplored. The current study isolated a new species of Mucilaginibacter (type strain JXJ CY 39T) from culture biomass of the bloom-causing Microcystis aeruginosa FACHB-905 (Maf) from Lake Dianchi, China. Strain JXJ CY 39T was an aerobic, Gram-stain-negative rod bacterium that grew at 5–38°C, pH 4.0–11.0, and 0–3.0% NaCl. Taxonomic evaluation proposed a new species, with Mucilaginibacter lacusdianchii sp. nov., as the species epithet. Experimental results revealed that strain JXJ CY 39T spurred the growth of Maf by supplying soluble phosphorus and nitrogen during cultivation, despite the unavailability of soluble phosphorus and nitrogen. Additionally, by producing the plant hormone indole-3-acetate, strain JXJ CY 39T possibly impacted Maf’s functionality. Results from co-culture experiments with other strains from Maf biomass showed possible effects of strain JXJ CY 39T on the relationship between Maf and other cohabiting bacteria, as well as microcystin toxin production characteristics. Although Maf could foster the growth of strain JXJ CY 39T by supplying organic carbon, the strain’s growth could be regulated via specific chemical compounds based on antibiotic assays. Community composition analysis disclosed that this Mucilaginibacter strain positively affected Maf’s growth and modified densities and types of bacteria linked to Maf. Overall, these results suggest that the interactions between important HAB-causing organisms and their attached bacteria are complex, dynamic, and may influence the growth characteristics of algae.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）