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Kryvenda A, Tischner R, Steudel B, Griehl C, Armon R, Friedl T. Testing for terrestrial and freshwater microalgae productivity under elevated CO 2 conditions and nutrient limitation. BMC PLANT BIOLOGY 2023; 23:27. [PMID: 36635620 PMCID: PMC9837994 DOI: 10.1186/s12870-023-04042-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Microalgae CO2 fixation results in the production of biomass rich in high-valuable products, such as fatty acids and carotenoids. Enhanced productivity of valuable compounds can be achieved through the microalgae's ability to capture CO2 efficiently from sources of high CO2 contents, but it depends on the species. Culture collections of microalgae offer a wide variety of defined strains. However, an inadequate understanding of which groups of microalgae and from which habitats they originate offer high productivity under increased CO2 concentrations hampers exploiting microalgae as a sustainable source in the bioeconomy. RESULTS A large variety of 81 defined algal strains, including new green algal isolates from various terrestrial environments, were studied for their growth under atmospheres with CO2 levels of 5-25% in air. They were from a pool of 200 strains that had been pre-selected for phylogenetic diversity and high productivity under ambient CO2. Green algae from terrestrial environments exhibited enhanced growth up to 25% CO2. In contrast, in unicellular red algae and stramenopile algae, which originated through the endosymbiotic uptake of a red algal cell, growth at CO2 concentrations above 5% was suppressed. While terrestrial stramenopile algae generally tolerated such CO2 concentrations, their counterparts from marine phytoplankton did not. The tests of four new strains in liquid culture revealed enhanced biomass and chlorophyll production under elevated CO2 levels. The 15% CO2 aeration increased their total carotenoid and fatty acid contents, which were further stimulated when combined with the starvation of macronutrients, i.e., less with phosphate and more with nitrogen-depleted culture media. CONCLUSION Green algae originating from terrestrial environments, Chlorophyceae and Trebouxiophyceae, exhibit enhanced productivity of carotenoids and fatty acids under elevated CO2 concentrations. This ability supports the economic and sustainable production of valuable compounds from these microalgae using inexpensive sources of high CO2 concentrations, such as industrial exhaust fumes.
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Affiliation(s)
- Anastasiia Kryvenda
- Albrecht-von-Haller-Institute for Plant Sciences, Department of Experimental Phycology and Culture Collection of Algae (SAG), University of Göttingen, Nikolausberger Weg 18, 37073 Göttingen, Germany
- Present address: Staatliche Betriebsgesellschaft für Umwelt und Landwirtschaft, 01683 Nossen, Germany
| | - Rudolf Tischner
- Albrecht-von-Haller-Institute for Plant Sciences, Department of Experimental Phycology and Culture Collection of Algae (SAG), University of Göttingen, Nikolausberger Weg 18, 37073 Göttingen, Germany
| | - Bastian Steudel
- Albrecht-von-Haller-Institute for Plant Sciences, Department of Experimental Phycology and Culture Collection of Algae (SAG), University of Göttingen, Nikolausberger Weg 18, 37073 Göttingen, Germany
- Present address: Department of Health and Environmental Sciences, Xi’an Jiaotong-Liverpool University (XJTLU), Suzhou, 215123 Jiangsu Province China
| | - Carola Griehl
- Department of Applied Biosciences and Process Technology, Competence Center Algal Biotechnology, Anhalt University of Applied Sciences, 06366 Köthen, Germany
| | - Robert Armon
- Technion-Israel Institute of Technology, Faculty of Civil and Environmental Engineering, 32000 Haifa, Israel
| | - Thomas Friedl
- Albrecht-von-Haller-Institute for Plant Sciences, Department of Experimental Phycology and Culture Collection of Algae (SAG), University of Göttingen, Nikolausberger Weg 18, 37073 Göttingen, Germany
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Liang L, Deng Y, Li J, Zhou Z, Tuo Y. Modelling of pH changes in alkaline lakes with water transfer from a neutral river. CHEMOSPHERE 2023; 310:136882. [PMID: 36265701 DOI: 10.1016/j.chemosphere.2022.136882] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/01/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
While water transfer from rivers to alkaline lakes has been proposed to solve lake water level drawdown and ecological degradation problems, its effectiveness for achieving ecological goals is often questionable. A sudden pH decline in alkaline lakes due to water transfer is considered likely to harm the lake ecology. However, it remains unclear to what extent water transfer affects alkaline lake pH. Thus, a three-dimensional numerical model coupling a pH calculation method considering the carbonate balance with the MIKE3 hydrodynamic model was developed to predict pH changes in an alkaline lake. Laboratory and field measurements verified the model reliability. The model accurately simulated the mixed-water pH during water transfer, with a root mean square error of 0.03-0.07 and a coefficient of determination of 0.894-0.998. The model was then applied to predict the pH response to water transfer in Lake Chenghai. The results showed that the pH response to water transfer demonstrated spatial and temporal variability, and a low-pH diffusion zone (pH ≤ 9) formed in the northern parts of the lake during annual water transfer; the effects of water transfer on the pH in the lake were cumulative over time, and the average pH in Lake Chenghai after five years decreased by 0.2 units; strong wind and low inflow could effectively reduce the low-pH diffusion area; and daily thermal stratification of the plateau region threatened the low-pH diffusion area control in Lake Chenghai. Our results provide a new reference for formulating ecological water transfer strategies for alkaline lakes and similar water bodies.
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Affiliation(s)
- Li Liang
- Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu, 610039, China
| | - Yun Deng
- 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
| | - Zili Zhou
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Youcai Tuo
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
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Rashid J, Imtiaz F, Xu M, Savina IN. Hydrogen peroxide modified and bismuth vanadate decorated titanium dioxide nanocomposite (BiVO 4@HMT) for enhanced visible light photocatalytic growth inhibition of harmful cyanobacteria in water. RSC Adv 2022; 12:31338-31351. [PMID: 36349036 PMCID: PMC9623613 DOI: 10.1039/d2ra05317a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 10/25/2022] [Indexed: 12/23/2022] Open
Abstract
The persistence of harmful cyanobacterial algal blooms in aquatic ecosystems leads to health damage for various life forms. In this study, a photocatalyst active in the visible light range was prepared by combining BiVO4 with hydrogen peroxide modified titanium dioxide (BiVO4@HMT; for short), using an impregnation method. The catalyst was used to photocatalytically inhibit the growth of cyanobacteria collected from a bloom site. To infer the optimum pH for cyanobacterial growth, the effect of pH was studied. The growth of cyanobacteria was favoured in an alkaline environment at pH values in the range of 8-9.5 when analysed on the 20th day of incubation. Structural and chemical analysis of pristine and composite nano-powders was performed using XRD, SEM, TEM and XPS, confirming the heterojunction formation, while optical and band gap analysis revealed increased visible light absorption and reduced band gap of the composite. A small strawberry seed-like assembly of BiVO4 particles increased the light absorption in the 15%BiVO4@HMT composite and increased the inhibition efficiency up to 2.56 times compared to pristine HMT at an exposure time of 6 h and cell concentration at 0.1 g L-1 with an optimum catalyst dose of 1 g L-1. The amount of chlorophyll 'a' decreased due to the generation of catalytically reactive species, especially holes (h+), which caused oxidative damage to the cell wall, cell membrane and antioxidants in algal cells. This study reports that visible light active nanocatalysts can be used as a promising method for reducing algal blooms in water bodies.
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Affiliation(s)
- Jamshaid Rashid
- BNU-HKUST Laboratory for Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai Zhuhai 519087 China
- Department of Environmental Science, Faculty of Biological Sciences, Quaid-I-Azam University Islamabad 45320 Pakistan
| | - Fatima Imtiaz
- Department of Environmental Science, Faculty of Biological Sciences, Quaid-I-Azam University Islamabad 45320 Pakistan
| | - Ming Xu
- BNU-HKUST Laboratory for Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai Zhuhai 519087 China
| | - Irina N Savina
- School of Applied Sciences, University of Brighton Huxley Building, Lewes Road Brighton BN2 4GJ UK
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Jabbur ML, Johnson CH. Spectres of Clock Evolution: Past, Present, and Yet to Come. Front Physiol 2022; 12:815847. [PMID: 35222066 PMCID: PMC8874327 DOI: 10.3389/fphys.2021.815847] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/22/2021] [Indexed: 01/20/2023] Open
Abstract
Circadian clocks are phylogenetically widespread biological oscillators that allow organisms to entrain to environmental cycles and use their steady-state phase relationship to anticipate predictable daily phenomena – such as the light-dark transitions of a day – and prepare accordingly. Present from cyanobacteria to mammals, circadian clocks are evolutionarily ancient and are thought to increase the fitness of the organisms that possess them by allowing for better resource usage and/or proper internal temporal order. Here, we review literature with respect to the ecology and evolution of circadian clocks, with a special focus on cyanobacteria as model organisms. We first discuss what can be inferred about future clock evolution in response to climate change, based on data from latitudinal clines and domestication. We then address our current understanding of the role that circadian clocks might be contributing to the adaptive fitness of cyanobacteria at the present time. Lastly, we discuss what is currently known about the oldest known circadian clock, and the early Earth conditions that could have led to its evolution.
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Ma X, Chen X, Fan J, Wang Y, Zhang J. The response of three typical freshwater algae to acute acid stress in water. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2022; 57:102-110. [PMID: 35129075 DOI: 10.1080/10934529.2022.2036070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/19/2022] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
The effect of acidic pH conditions on the physiological response of three typical freshwater algae, Chlorella vulgaris, Microcystis aeruginosa and Scenedesmus quadricauda, was investigated in this study. The results of the cultivation experiment indicated that the mortality of the three algae in the logarithmic growth phase increased with increasing exposure time and acidity under acute acidic conditions. The tolerance of S. quadricauda was stronger than that of the other two species under long-term (6 h) exposure to the same acidity; in contrast, C. vulgaris exhibited the greatest tolerance under short-term exposure conditions. The decrease in chlorophyll a (Chl a) content indicated that the photosynthesis of algae was inhibited under acid stress and that the algae could not continue to grow normally. This was consistent with the changes in lipid peroxidation and antioxidant enzyme activity, which were reflected by the malondialdehyde (MDA) content and superoxide dismutase (SOD) activity under acid stress, respectively. The results of this study demonstrated that when exposed to acute acidic conditions, the tolerance of three typical freshwater algae to acidity was significantly different. These findings provide valuable information for poorly mixed acidification operations designed to adjust the pH in lakes, reservoirs, or intake pipes of purification plants.
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Affiliation(s)
- Xing Ma
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, China
| | - Xuan Chen
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, China
| | - Jiangtao Fan
- Yan'an Water Environmental Protection Group Yanhe Water Supply Co. Lit, Yan'an, China
| | - Yunzhong Wang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, China
| | - Jianfeng Zhang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, China
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Xu S, Zhang L, Lin K, Bai M, Wang Y, Xu M, Zhang M, Zhang C, Shi Y, Zhou H. Effects of light and water disturbance on the growth of Microcystis aeruginosa and the release of algal toxins. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:2958-2970. [PMID: 34551458 DOI: 10.1002/wer.1644] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 08/18/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Eutrophication of water constitutes a serious threat to global water quality. Light intensity and water disturbance are important factors affecting the growth of algae and the release of algal toxins. In this study, algal growth indicators, algal enzyme systems, and algal toxin release in Microcystis aeruginosa under different light intensities and water disturbances were determined. The results showed that 2500 lx and 120 rpm were the optimal conditions for the growth of M. aeruginosa. The growth of algal cells was inhibited by high light intensity and high water disturbance. However, the optimal conditions for algal growth were not favorable conditions for the release of algal toxin. The highest concentration of microcystin-LR (MC-LR), observed at 4500 lx and 80 rpm, was 198.1 μg/L, whereas the highest single cell toxin production reached up to 10.49 × 10-9 μg/cell at 7000 lx and 120 rpm. Redundancy analysis results showed that the concentration of MC-LR was positively correlated with algal cell density and antioxidant enzyme activities (superoxide dismutase, catalase, peroxidase, and malondialdehyde [MDA]) and negatively correlated with the total nitrogen and total phosphorus consumption rates and MDA. Single cell toxin production was negatively correlated with algal cell density and antioxidant enzyme activity but positively correlated with MDA content. PRACTITIONER POINTS: There was an optimal water disturbance condition for algae growth affected by the light intensity. Optimal conditions for algae cell growth are not necessarily the optimal conditions for algal toxin release. Enzyme indicators have correlation with the release of algae toxins and the growth of algae cells.
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Affiliation(s)
- Shaofeng Xu
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, China
| | - Lingyue Zhang
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, China
| | - Kaizong Lin
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, China
| | - Miao Bai
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, China
| | - Yue Wang
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, China
| | - Mengyao Xu
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, China
| | - Minglu Zhang
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, China
| | - Can Zhang
- Center for Disease Control and Prevention of Chinese PLA, Beijing, China
| | - Yun Shi
- Center for Disease Control and Prevention of Chinese PLA, Beijing, China
| | - He Zhou
- Marketing and Sales Department, Beijing Yizhuang Water Company, Beijing, China
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7
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Nam SH, An YJ. Perspectives on microalgae as model organisms toward the standardization of soil algal toxicity test methods. Comp Biochem Physiol C Toxicol Pharmacol 2021; 249:109144. [PMID: 34302981 DOI: 10.1016/j.cbpc.2021.109144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 07/01/2021] [Accepted: 07/13/2021] [Indexed: 10/20/2022]
Abstract
When considering test species for soil ecotoxicity, the development of new model organisms is often suggested to increase the reliability of ecological risk assessments. Ubiquitous soil algae could offer potential test species for assessing various soil pollution levels. Currently, there are few reviews offering comprehensive perspectives on stressors-based toxicological studies using microalgae in soil media, with the majority of scholarly attention paid to the toxicological effects of freshwater algae or marine algae in aquatic ecosystems. In this review, we focus on current toxicological studies of microalgae assessed in soil-related media and suggest considerations for using microalgae in soil toxicity tests based on 22 publications (1998-2021). In addition, we analyzed characteristics of soil algae based on criteria for selecting test species and suggest that future research should be directed toward the standardization of soil algal toxicity test methods. This review discusses a promising method using soil algae as new test species for soil toxicity assessment as cost-effective and environmentally sound soil quality bioindicators. The review also addresses the lack of understanding behind how soil algae can serve as important test species for soil ecotoxicity.
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Affiliation(s)
- Sun-Hwa Nam
- Department of Environmental Health Science, Konkuk University, Seoul 05029, Republic of Korea
| | - Youn-Joo An
- Department of Environmental Health Science, Konkuk University, Seoul 05029, Republic of Korea.
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Sayara T, Khayat S, Saleh J, Van Der Steen P. Bioremediation of Nutrients from Municipal Wastewater Using Algal-Bacterial Photobioreactor: Real Field Scale Demonstration for Improving Effluent Quality. J WATER CHEM TECHNO+ 2021. [DOI: 10.3103/s1063455x21030103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Acuña-Alonso C, Lorenzo O, Álvarez X, Cancela Á, Valero E, Sánchez Á. Influence of Microcystis sp. and freshwater algae on pH: Changes in their growth associated with sediment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114435. [PMID: 32283394 DOI: 10.1016/j.envpol.2020.114435] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 03/05/2020] [Accepted: 03/20/2020] [Indexed: 06/11/2023]
Abstract
Samples from two reservoirs with eutrophication problems, located in Pontevedra and Ourense (Northwestern Spain), were cultured, along with a third crop from a reservoir with no problems detected in Ourense (Northwestern Spain). The samples were grown under the same conditions (with an average temperature of 21 ± 2 °C, and a 3000 lux light intensity) in triplicate, and their growth, absorbance and pH were studied. High correlation values were obtained for pH and cellular growth (R2 ≥ 95%). The water from Salas showed the greatest microalgal growth (0.15 × 106 cells/ml to 31.70 × 106 cells/ml of Microcystis sp. for the last day of culturing) and the greatest increase in pH (5.72-9.02). In all the cultures studied here, the main species that reproduced was Microcystis sp., which can produce neurotoxins and hepatotoxins. In addition, water samples were cultured with sediments of their own reservoir and with others to observe their evolution. The sediments studied in this case were rich in biotites, which can lead phosphate to be a limiting factor for phytoplankton due to the formation and sedimentation of insoluble salts of ferric phosphate. In crops grown with sediments from the Salas reservoir, actinobacteria developed which can inhibit microalgal growth. The study of the growth of cyanobacteria and possible methods of inhibiting them directly concerns the quality of water and its ecosystems, avoiding pollution and impact on ecosystems.
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Affiliation(s)
- Carolina Acuña-Alonso
- Engineering Department of Natural Resources and Environment, School of Forestry Engineering, University of Vigo, Campus A Xunqueira s/n., 36005, Pontevedra, Spain.
| | - Olalla Lorenzo
- School of Forestry Engineering, Campus A Xunqueira s/n, University of Vigo, 36005, Pontevedra, Spain.
| | - Xana Álvarez
- Engineering Department of Natural Resources and Environment, School of Forestry Engineering, University of Vigo, Campus A Xunqueira s/n., 36005, Pontevedra, Spain.
| | - Ángeles Cancela
- Chemical Engineering Department, School of Forestry Engineering, University of Vigo, Campus CampusAXunqueira s/n., 36005, Pontevedra, Spain.
| | - Enrique Valero
- Engineering Department of Natural Resources and Environment, School of Forestry Engineering, University of Vigo, Campus A Xunqueira s/n., 36005, Pontevedra, Spain.
| | - Ángel Sánchez
- Chemical Engineering Department, Industrial Engineering College, University of Vigo, Campus Lagoas-Marcosende s/n, 36310, Vigo, Pontevedra, Spain.
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Kataoka T, Ohbayashi K, Kobayashi Y, Takasu H, Nakano SI, Kondo R, Hodoki Y. Distribution of the Harmful Bloom-Forming Cyanobacterium, Microcystis aeruginosa, in 88 Freshwater Environments across Japan. Microbes Environ 2020; 35. [PMID: 32074549 PMCID: PMC7104289 DOI: 10.1264/jsme2.me19110] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Microcystis aeruginosa was quantitatively surveyed in 88 freshwater environments across Japan within 3 weeks in 2011. In order to clarify the distribution pattern of M. aeruginosa at the intra-species level, three major genotypes, which were defined by 16S-23S rRNA inter-transcribed-spacer (ITS) regions, were selectively detected using quantitative real-time PCR assays. Of the 68 sites at which the Microcystis intergenic-spacer region of the phycocyanin (IGS-PC) gene was detected, the M. aeruginosa morphotype-related genotype (MG1) dominated in 41 sites, followed by the non-toxic M. wesenbergii-related genotype (MG3). A correlation analysis showed that total nitrogen and phosphate positively correlated with the abundance of IGS-PC, which positively correlated with microcystin synthetase gene abundance. A redundancy analysis of genotype compositions showed that pH positively correlated with the dominance of MG3 and negatively correlated with MG1, i.e., both toxic and non-toxic genotypes. Our survey of Microcystis populations over a wide area revealed that MG1 is a dominant genotype in Japan.
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Affiliation(s)
- Takafumi Kataoka
- Faculty of Marine Science and Technology, Fukui Prefectural University
| | - Kako Ohbayashi
- Graduate School of Arts and Sciences, The University of Tokyo
| | - Yuki Kobayashi
- Faculty of Health Sciences Yamaguchi University Graduate School of Medicine
| | | | | | - Ryuji Kondo
- Faculty of Marine Science and Technology, Fukui Prefectural University
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Ma J, Wang P, Wang X, Xu Y, Paerl HW. Cyanobacteria in eutrophic waters benefit from rising atmospheric CO 2 concentrations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 691:1144-1154. [PMID: 31466196 DOI: 10.1016/j.scitotenv.2019.07.056] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/03/2019] [Accepted: 07/04/2019] [Indexed: 06/10/2023]
Abstract
Rising atmospheric carbon dioxide (CO2) may stimulate the proliferation of cyanobacteria. To investigate the possible physiological responses of cyanobacteria to elevated CO2 at different nutrient levels, Microcystis aeruginosa were exposed to different concentrations of CO2 (400, 1100, and 2200 ppm) under two nutrient regimes (i.e., in nutrient-rich and nutrient-poor media). The results indicated that M. aeruginosa differed in its responses to elevated atmospheric CO2 at different nutrient levels. The light utilization efficiency and photoprotection of photosystem II were improved by elevated CO2, particularly when cells were supplied with abundant nutrients. In nutrient-poor media, both total organic carbon and the polysaccharide/protein ratio of the extracellular polymeric substance increased with elevated CO2, accompanied by high cellular carbon/nitrogen ratios. Besides, cells growing with fewer nutrients were more prone to suffer intracellular acidification with elevated CO2 than those growing with abundant nutrients. Nonetheless, alkaline phosphate activity of cyanobacteria was improved by high CO2, provided that reduced pH was in the optimum range for alkaline phosphate activity. Nitrate reductase activity was inhibited by elevated CO2 regardless of nutrient levels, leading to a reduced nitrate uptake. These changes indicate that the biogeochemical cycling of nutrients would be affected by higher atmospheric CO2 conditions. Overall, cyanobacteria in eutrophic waters may benefit more than in oligotrophic waters from rising atmospheric CO2 concentrations, and evaluations of the influence of rising atmospheric CO2 on algae should account for the nutrient level of the ecosystem.
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Affiliation(s)
- Jingjie Ma
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Xun Wang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Yi Xu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Hans W Paerl
- Institute of Marine Sciences, University of North Carolina at Chapel Hill, Morehead City, NC 28557, United States
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Liu X, Wang K, Wang J, Zuo J, Peng F, Wu J, San E. Carbon dioxide fixation coupled with ammonium uptake by immobilized Scenedesmus obliquus and its potential for protein production. BIORESOURCE TECHNOLOGY 2019; 289:121685. [PMID: 31323715 DOI: 10.1016/j.biortech.2019.121685] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/17/2019] [Accepted: 06/18/2019] [Indexed: 06/10/2023]
Abstract
In this study, immobilized Scenedesmus obliquus (S. obliquus) was proposed to simultaneously alleviate the carbon dioxide (CO2) and ammonium (NH4+-N). Two trophic modes of autotrophy and mixotrophy were conducted by batch experiments with a period of 5 days. The results shown that NH4+-N could be removed more efficiently if algal cells were immobilized, and the trophic mode change had no significant effect on immobilized S. obliquus to NH4+-N removal under 5% CO2 sparging. Specifically, immobilized S. obliquus could remove NH4+-N completely at initial concentrations of 30 and 50 mg/L and reached about 80% removal rate of NH4+-N at the concentration of 70 mg/L under both trophic modes. The protein synthesis was its main removal mechanism and the dominant amino acid components including glutamic acid (Glu), cystine (Cys), arginine (Arg), methionine (Met) and lysine (Lys) were sensitive to NH4+-N assimilation.
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Affiliation(s)
- Xiang Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Kaijun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
| | - Jingyao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jiane Zuo
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Fei Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jing Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Erfu San
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
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Navarrete IA, Dicen GP, Perez TR, Mendoza SM, Rallos RV, Labides JLR, Rivera CT, Hallare AV, Claveria RJR. Towards integrated management of a shallow tropical lake: assessment of water quality, sediment geochemistry, and phytoplankton diversity in Lake Palakpakin, Philippines. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:485. [PMID: 31280379 DOI: 10.1007/s10661-019-7617-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 06/24/2019] [Indexed: 06/09/2023]
Abstract
The limited carrying capacities of shallow tropical lakes render them more vulnerable to ecological problems like eutrophication. Unregulated human activities such as unsustainable aquaculture and urbanization can alter ecosystem dynamics rapidly, and this warrants more comprehensive researches than what has been previously conducted. Here, we presented an integrated assessment of the nutrient dynamics, phytoplankton diversity, and sediment geochemistry in Lake Palakpakin, a shallow tropical lake of volcanic origin, to understand its deteriorating ecological state. Water, phytoplankton, and sediment samples were collected, and in situ water quality measurements were done during wet and dry seasons in four critical areas in the lake, namely, the inlet, center, sanctuary, and outlet. Results revealed that high light extinction coefficient (1.13 m-1), high turbidity (28 NTU), high phosphate concentration (> 2.0.5 mg/L), and the abundance of Microcystis aeruginosa, Anabaena helicoidea, and Lyngbya sp. indicate that from a relatively healthy lake in 2008, Lake Palakpakin has become a eutrophic to hypereutrophic freshwater body. High concentrations of available nutrients such as N and P were detected in the center and sanctuary sediments, which drive the internal nutrient loading in the lake. We recommend that management efforts be directed towards a whole-ecosystem approach in addressing the problem of eutrophication, especially in shallow tropical lakes.
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Affiliation(s)
- Ian A Navarrete
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines.
- College of Agriculture, Food and Environmental Science, Southern Leyte State University, 6608, Hinunangan, Southern Leyte, Philippines.
| | - Gerald P Dicen
- Agriculture Research Section, Atomic Research Division, Department of Science and Technology, Philippine Nuclear Research Institute, Commonwealth Avenue, Diliman, 1101, Quezon City, Philippines
| | - Teresita R Perez
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
| | - Shinelle M Mendoza
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
| | - Roland V Rallos
- Agriculture Research Section, Atomic Research Division, Department of Science and Technology, Philippine Nuclear Research Institute, Commonwealth Avenue, Diliman, 1101, Quezon City, Philippines
| | - John Leonard R Labides
- Agriculture Research Section, Atomic Research Division, Department of Science and Technology, Philippine Nuclear Research Institute, Commonwealth Avenue, Diliman, 1101, Quezon City, Philippines
| | - Clarissa T Rivera
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
| | - Arnold V Hallare
- Department of Biology, College of Arts and Sciences, University of the Philippines-Manila, Padre Faura, 1000, Manila, Philippines
| | - Rene Juna R Claveria
- Department of Environmental Science, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, 1108, Quezon City, Philippines
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Kwak JI, Nam SH, Kim SW, Bajagain R, Jeong SW, An YJ. Changes in soil properties after remediation influence the performance and survival of soil algae and earthworm. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:189-196. [PMID: 30826545 DOI: 10.1016/j.ecoenv.2019.02.079] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/22/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Previous research on soil remediation focused on soil properties and not on its effects on soil ecosystems. The present study investigated the adverse effects of soil physicochemical changes due to remediation on the biological indicators Chlorococcum infusionum and Chlamydomonas reinhardtii (algae) and Eisenia andrei (earthworm). Soil physicochemical properties, concentrations of total, bioavailable, and water-soluble heavy metals in soil were measured before and after remediation. Changes in soil pH, electrical conductivity, total nitrogen, and total phosphorous immediately after soil remediation were the primary causes of the biomass and photosynthetic activity inhibition observed in C. infusionum and C. reinhardtii, and the survival, normality, and burrowing behavior decrease observed in E. andrei in remediated soils showing dramatic changes in those properties. These findings suggest that remediated soils need some time to recover before restoring their functions, although heavy metals are no longer contaminating the soil.
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Affiliation(s)
- Jin Il Kwak
- Department of Environmental Health Science, Konkuk University, Seoul 05029, Republic of Korea
| | - Sun-Hwa Nam
- Department of Environmental Health Science, Konkuk University, Seoul 05029, Republic of Korea
| | - Shin Woong Kim
- Department of Environmental Health Science, Konkuk University, Seoul 05029, Republic of Korea
| | - Rishikesh Bajagain
- Department of Environmental Engineering, Kunsan National University, Kunsan 54150, Republic of Korea
| | - Seung-Woo Jeong
- Department of Environmental Engineering, Kunsan National University, Kunsan 54150, Republic of Korea
| | - Youn-Joo An
- Department of Environmental Health Science, Konkuk University, Seoul 05029, Republic of Korea.
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15
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Du K, Wen X, Wang Z, Liang F, Luo L, Peng X, Xu Y, Geng Y, Li Y. Integrated lipid production, CO 2 fixation, and removal of SO 2 and NO from simulated flue gas by oleaginous Chlorella pyrenoidosa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:16195-16209. [PMID: 30972683 DOI: 10.1007/s11356-019-04983-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
CO2, SO2, and NO are the main components of flue gas and can cause serious environmental issues. Utilization of these compounds in oleaginous microalgae cultivation not only could reduce air pollution but could also produce feedstock for biodiesel production. However, the continuous input of SO2 and NO inhibits microalgal growth. In this study, the toxicity of simulated flue gas (15% CO2, 0.03% SO2, and 0.03% NO, balanced with N2) was reduced through automatic pH feedback control. Integrated lipid production and CO2 fixation with the removal of SO2 and NO was achieved. Using this technique, a lipid content of 38.0% DW was achieved in Chlorella pyrenoidosa XQ-20044. The lipid composition and fatty acid profile indicated that lipid production by C. pyrenoidosa XQ-20044 cultured with flue gas is suitable as a biodiesel feedstock; 81.2% of the total lipids were neutral lipids and 99.5% of the total fatty acids were C16 and C18. The ratio of saturated fatty acids to monounsaturated fatty acids in the microalgal lipid content was 74.5%. In addition, CO2, SO2, and NO from the simulated flue gas were fixed and converted to biomass and lipids with a removal efficiency of 95.9%, 100%, and 84.2%, respectively. Furthermore, the utilization efficiencies of CO2, SO2, and NO were equal to or very close to their removal efficiencies. These results provide a novel strategy for combining biodiesel production with biofixation of flue gas.
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Affiliation(s)
- Kui Du
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
- Sichuan Provincial Academy of Natural Resource Sciences, Chengdu, 610015, People's Republic of China
| | - Xiaobin Wen
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
| | - Zhongjie Wang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
| | - Fang Liang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
- Institute of Bioengineering, Zhengzhou Normal University, Zhengzhou, 450044, People's Republic of China
| | - Liming Luo
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, 78703, USA
| | - Xinan Peng
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
- College of Information Engineering, Henan University of Animal Husbandry and Economy, Zhengzhou, 450044, People's Republic of China
| | - Yan Xu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
| | - Yahong Geng
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China
| | - Yeguang Li
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, People's Republic of China.
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16
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Mecina GF, Chia MA, Cordeiro-Araújo MK, Bittencourt-Oliveira MDC, Varela RM, Torres A, González Molinillo JM, Macías FA, da Silva RMG. Effect of flavonoids isolated from Tridax procumbens on the growth and toxin production of Microcystis aeruginos. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 211:81-91. [PMID: 30954847 DOI: 10.1016/j.aquatox.2019.03.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The excessive proliferation of toxin producing cyanobacteria constitutes a significant health risk to the environment and humans. This is due to the contamination of potable water and accumulation of cyanotoxins in plant and animal tissues. As a means of controlling bloom forming cyanobacteria, secondary metabolites with pro-oxidative activities from plants are used to treat water bodies contaminated with cyanobacterial blooms and their associated toxins. The objective of the present study was to evaluate the mechanism of action of extract, fractions and isolated flavonoids of Tridax procumbens L. on Microcystis aeruginosa (Kützing) Kützing. by monitoring changes in growth, oxidative stress, antioxidant response, and cyanatoxin microcystins (MCs) production. The extract, fraction 3 and the isolated flavonoids significantly reduced the cell density of the cyanobacterium. Furthermore, the extract and fraction 3 increased the production of reactive oxygen species, induced lipid peroxidation, and altered antioxidant enzyme activities of M. aeruginosa. The total MCs content of the cyanobacterium was negatively affected by the presence of the extract, fractions and isolated flavonoids. The present study show that T. procumbens has secondary metabolites that are capable of interfering with the physiology and microcystins production of M. aeruginosa. These characteristics are promising for the control of this noxious cyanobacterium in aquatic ecosystems.
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Affiliation(s)
- Gustavo Franciscatti Mecina
- São Paulo State University (UNESP), School of Sciences, Humanities and Languages Assis, Department of Biotechnology, Laboratory of Herbal Medicine and Natural Products, Avenida Dom Antônio 2100, CEP: 19806-900, Assis, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, CEP: 14800-060, Araraquara, São Paulo, Brazil
| | - Mathias Ahii Chia
- Department of Botany, Ahmadu Bello University, Zaria, 810001 Nigeria
| | - Micheline Kézia Cordeiro-Araújo
- Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Maria do Carmo Bittencourt-Oliveira
- Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Rosa Maria Varela
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - Ascensión Torres
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - José María González Molinillo
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - Francisco Antonio Macías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional 6 (ceiA3), School of Science, University of Cadiz, C/República Saharaui 7, 11510, Puerto Real, Cadiz, Spain
| | - Regildo Márcio Gonçalves da Silva
- São Paulo State University (UNESP), School of Sciences, Humanities and Languages Assis, Department of Biotechnology, Laboratory of Herbal Medicine and Natural Products, Avenida Dom Antônio 2100, CEP: 19806-900, Assis, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, CEP: 14800-060, Araraquara, São Paulo, Brazil.
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17
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Li R, Huang H, Wang JJ, Liang W, Gao P, Zhang Z, Xiao R, Zhou B, Zhang X. Conversion of Cu(II)-polluted biomass into an environmentally benign Cu nanoparticles-embedded biochar composite and its potential use on cyanobacteria inhibition. JOURNAL OF CLEANER PRODUCTION 2019; 216:25-32. [DOI: 10.1016/j.jclepro.2019.01.186] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
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18
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Bautista-Chamizo E, Borrero-Santiago AR, De Orte MR, DelValls Á, Riba I. Effects of CO 2 enrichment on two microalgae species: A toxicity approach using consecutive generations. CHEMOSPHERE 2018; 213:84-91. [PMID: 30216816 DOI: 10.1016/j.chemosphere.2018.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/30/2018] [Accepted: 09/01/2018] [Indexed: 06/08/2023]
Abstract
As a result of the increasing pressure provoked by anthropogenic activities, the world climate is changing and oceans health is in danger. One of the most important factors affecting the marine environment is the well-known process called ocean acidification. Also, there are other natural or anthropogenic processes that produce an enrichment of CO2 in the marine environment (CO2 leakages from Carbon Capture and Storage technologies (CCS), organic matter diagenesis, volcanic vents, etc). Most of the studies related to acidification of the marine environment by enrichment of CO2 have been focused on short-term experiments. To evaluate the effects related to CO2 enrichment, laboratory-scale experiments were performed using the marine microalgae Tetraselmis chuii and Phaeodactylum tricornutum. Three different pH values (two treatments - pH 7.4 and 6.0 - and a control - pH 8.0) were tested on the selected species across four consecutive generations. Seawater was collected and exposed to different scenarios of CO2 enrichment by means of CO2 injection. The results showed different effects depending on the species and the generation used. Effects on T. chuii were shown on cell density, chlorophyll-a and metabolic activity, however, a slight adaptation across generations was found in this last parameter. P. tricornutum was more sensitive to acidification conditions through generations, with practically total growth inhibition in the fourth one. The conclusions obtained in this work are useful to address the potential ecological risk related to acidification by enrichment of CO2 on the marine ecosystem by using consecutive generations of microalgae.
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Affiliation(s)
- Esther Bautista-Chamizo
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real, Cádiz, Spain.
| | - Ana R Borrero-Santiago
- Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway.
| | - Manoela R De Orte
- Departamento de Ciencias do Mar, Universidade Federal de São Paulo, Santos, SP, Brazil.
| | - Ángel DelValls
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real, Cádiz, Spain.
| | - Inmaculada Riba
- Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real, Cádiz, Spain.
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19
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Jin Y, Hao D, Chen S, Xu H, Hu W, Ma C, Sun J, Li H, Pei H. Primary investigation of the antialgal activity of shrimp shell on Microcystis aeruginosa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:20662-20669. [PMID: 29752672 DOI: 10.1007/s11356-018-2217-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
This study aimed to explore the application potential of an eco-friendly waste-shrimp shell in Microcystis aeruginosa (M. aeruginosa) control-for the first time. Four treatments with different doses (0.75, 1.5, 3.0, and 6.0 g/L) were built to investigate the effects of shrimp shell on the growth, cell viability, physiological changes, and microcystins (MCs) release of M. aeruginosa cells. The water quality after shrimp shell treatment was also detected. Results showed that the growth of M. aeruginosa was effectively inhibited by shrimp shell, and the inhibition rates were dose-dependent within 7 days. Though shrimp shells at high doses could inhibit the cell growth greatly, the MC release was accelerated as they led to the cells lysis. While with the low shrimp shell dose (0.75 g/L), both satisfied inhibition effect and low MC release could be achieved simultaneously. For the water quality, we found that the turbidity and TN was not affected obviously with low dosage of shrimp shell, but it resulted in the increasing of CODMn and TP contents. In summary, the shrimp shell can be used as an effective algicide to control algal blooms but its adverse effect on CODMn and TP of water should be further solved.
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Affiliation(s)
- Yan Jin
- School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China
| | - Daping Hao
- Huaian Department of Hydrology and Water Resources Survey Office in Jiangsu Province, Huaian, 223005, China
| | - Shuhua Chen
- Jinan Water Group Co, Ltd, Jinan, 250002, China
| | - Hangzhou Xu
- School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China
| | - Wenrong Hu
- School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China
- Shandong Provincial Engineering Center on Environmental Science and Technology, Jinan, 250061, China
| | - Chunxia Ma
- School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China
| | - Jiongming Sun
- School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China
| | - Hongmin Li
- School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China
| | - Haiyan Pei
- School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China.
- Shandong Provincial Engineering Center on Environmental Science and Technology, Jinan, 250061, China.
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20
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Wang Z, Wen X, Xu Y, Ding Y, Geng Y, Li Y. Maximizing CO 2 biofixation and lipid productivity of oleaginous microalga Graesiella sp. WBG-1 via CO 2-regulated pH in indoor and outdoor open reactors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 619-620:827-833. [PMID: 29734628 DOI: 10.1016/j.scitotenv.2017.10.127] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/10/2017] [Accepted: 10/13/2017] [Indexed: 06/08/2023]
Abstract
Carbon dioxide (CO2) and pH are two interdependent factors that greatly impact the growth and lipid accumulation of microalgae. However, the effects of these two factors are usually studied separately. The use of exogenous CO2, such as flue gas derived, to regulate pH in the large-scale cultivation of microalgae provides an ideal means for combining CO2 biofixation and biodiesel production. In this study, the CO2 biofixation and lipid production of oleaginous microalga Graesiella sp. WBG-1 was explored for four pH levels regulated by exogenous 15% CO2 (flue gas concentration) in 10L circular culture ponds and 5m2 open raceway reactors. Results revealed that pH8.0-9.0 was the optimum pH for CO2 fixation and lipid production, attaining the highest CO2 fixation rates of 0.26gL-1day-1 and 18.9gm-2day-1, respectively, lipid contents of 46.28% and 32.38%, and lipid productivities of 64.8mgL-1day-1 and 3.14gm-2day-1. A positive correlation between CO2 utilization efficiency and pH in open reactors was also suggested in this research, and thus provides direction for screening of CO2 fixation by microalgae. The present study provides an excellent strategy for coupling CO2 fixation and lipid production via microalgae in large-scale cultivation.
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Affiliation(s)
- Zhongjie Wang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China
| | - Xiaobin Wen
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China.
| | - Yan Xu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China.
| | - Yi Ding
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China
| | - Yahong Geng
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China.
| | - Yeguang Li
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China.
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21
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Yang J, Tang H, Zhang X, Zhu X, Huang Y, Yang Z. High temperature and pH favor Microcystis aeruginosa to outcompete Scenedesmus obliquus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:4794-4802. [PMID: 29198029 DOI: 10.1007/s11356-017-0887-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
Competition between cyanobacteria and green algae affects phytoplankton succession and the well-known cyanobacteria blooms. Climate warming and water acidification are two concerned environmental issues changing the freshwater ecosystems. To investigate the competitive responses of phytoplankton to warming and acidification, we co-cultured Microcystis aeruginosa and Scenedesmus obliquus at a temperature range of 15-35 °C and a pH range of 5-9. Results showed that S. obliquus was superior competitor at 15 °C. At 20-30 °C, the populations of both Scenedesmus and Microcystis were inhibited by the presence of each other. S. obliquus was in competitive domination at the initial phase of cultivation, but was finally replaced by M. aeruginosa. Microcystis kept competition advantage at 35 °C, whereas Scenedesmus outcompeted Microcystis at acidic conditions (pH ≤ 6). Neutral and weakly alkaline conditions (pH 7-9) supported the replacement of competition domination from Scenedesmus to Microcystis. The present study revealed that climate warming may accelerate the phytoplankton succession from green algae to cyanobacteria, with the predicted promoted cyanobacteria blooms. Nonetheless, water acidification causes Microcystis to be a weak competitor with green algae, suggesting that the advantageous effect of Microcystis toward green algae at high temperatures was controlled by other variables like the water pH.
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Affiliation(s)
- Jingwen Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Hengxing Tang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Xingxing Zhang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Xuexia Zhu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Yuan Huang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China.
| | - Zhou Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China.
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22
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Sahoo PK, Guimarães JTF, Souza-Filho PWM, Silva MSDA, Silva RO, Pessim G, Moraes BCDE, Pessoa PFP, Rodrigues TM, Costa MFDA, Dall'agnol R. Influence of seasonal variation on the hydro-biogeochemical characteristics of two upland lakes in the Southeastern Amazon, Brazil. AN ACAD BRAS CIENC 2018; 88:2211-2227. [PMID: 27991958 DOI: 10.1590/0001-3765201620160354] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 08/26/2016] [Indexed: 11/22/2022] Open
Abstract
Limnological characteristics of the Violão and Amendoim lakes, in the Serra dos Carajás, Amazon, were studied interannually (2013-2014). Climate data indicate anomalous conditions during the 2013 rainy period with higher rainfall and lower temperature in the beginning (November). Lake levels were influenced after the first and second hour of each rainfall, which showed a strong synchronization between seasonal fluctuation of lake levels and local weather patterns. Based on the water quality, both lakes are classified as classes "1" and "2" in the CONAMA (Conselho Nacional do Meio Ambiente) scheme and as "excellent" to "good" in the WQI (Water Quality Index) categories. However, the limnology is distinctly different between the lakes and seasons. Higher trophic state and phytoplankton productivity were observed mainly during the rainy period in Violão Lake compared to Amendoim Lake. This may be due to deposition of leached nutrients in the former, mainly total phosphorus (TP), which was probably derived from mafic soils and guano. This is consistent with the significant positive correlation between Chlorophyll-a and TP at the end of the rainy period (March-April), whereas this was not observed in the beginning (November). This could possibly be a consequence of the more intense cloud cover, and unusual high rainfall that limits nutrient availability.
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Affiliation(s)
- Prafulla K Sahoo
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil
| | - José T F Guimarães
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil.,Universidade Federal do Pará, Geosciences Institute, Programa de Pós-graduação em Geologia e Geoquímica, Av. Augusto Correa 1, Guamá, 66075-110 Belém, PA, Brazil
| | - Pedro W M Souza-Filho
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil.,Universidade Federal do Pará, Geosciences Institute, Programa de Pós-graduação em Geologia e Geoquímica, Av. Augusto Correa 1, Guamá, 66075-110 Belém, PA, Brazil
| | - Marcio S DA Silva
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil
| | - Renato O Silva
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil
| | - Gustavo Pessim
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil
| | - Bergson C DE Moraes
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil
| | - Paulo F P Pessoa
- Hidrovia - Hidrogeologia e Sustentabilidade, Rua Albita 131/301, Cruzeiro, 30310-160 Belo Horizonte, MG, Brazil
| | - Tarcísio M Rodrigues
- Gerência de Meio Ambiente - Minas de Carajás, Departamento de Ferrosos Norte, Estrada Raymundo Mascarenhas, S/N, Mina de N4, 68516 000 Parauapebas, PA, Brazil
| | - Marlene F DA Costa
- Gerência de Meio Ambiente - Minas de Carajás, Departamento de Ferrosos Norte, Estrada Raymundo Mascarenhas, S/N, Mina de N4, 68516 000 Parauapebas, PA, Brazil
| | - Roberto Dall'agnol
- Vale Institute of Technology, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, PA, Brazil.,Universidade Federal do Pará, Geosciences Institute, Programa de Pós-graduação em Geologia e Geoquímica, Av. Augusto Correa 1, Guamá, 66075-110 Belém, PA, Brazil
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23
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Geada P, Pereira RN, Vasconcelos V, Vicente AA, Fernandes BD. Assessment of synergistic interactions between environmental factors on Microcystis aeruginosa growth and microcystin production. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.09.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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24
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Karam AL, McMillan CC, Lai YC, de Los Reyes FL, Sederoff HW, Grunden AM, Ranjithan RS, Levis JW, Ducoste JJ. Construction and Setup of a Bench-scale Algal Photosynthetic Bioreactor with Temperature, Light, and pH Monitoring for Kinetic Growth Tests. J Vis Exp 2017. [PMID: 28654054 PMCID: PMC5608424 DOI: 10.3791/55545] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The optimal design and operation of photosynthetic bioreactors (PBRs) for microalgal cultivation is essential for improving the environmental and economic performance of microalgae-based biofuel production. Models that estimate microalgal growth under different conditions can help to optimize PBR design and operation. To be effective, the growth parameters used in these models must be accurately determined. Algal growth experiments are often constrained by the dynamic nature of the culture environment, and control systems are needed to accurately determine the kinetic parameters. The first step in setting up a controlled batch experiment is live data acquisition and monitoring. This protocol outlines a process for the assembly and operation of a bench-scale photosynthetic bioreactor that can be used to conduct microalgal growth experiments. This protocol describes how to size and assemble a flat-plate, bench-scale PBR from acrylic. It also details how to configure a PBR with continuous pH, light, and temperature monitoring using a data acquisition and control unit, analog sensors, and open-source data acquisition software.
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Affiliation(s)
- Amanda L Karam
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University
| | - Catherine C McMillan
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University
| | - Yi-Chun Lai
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University
| | - Francis L de Los Reyes
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University;
| | - Heike W Sederoff
- Department of Plant and Microbial Biology, North Carolina State University
| | - Amy M Grunden
- Department of Plant and Microbial Biology, North Carolina State University
| | - Ranji S Ranjithan
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University
| | - James W Levis
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University
| | - Joel J Ducoste
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University
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25
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Kasiri S, Abdulsalam S, Ulrich A, Prasad V. Optimization of CO2 fixation by Chlorella kessleri using response surface methodology. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.01.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Hinners J, Hofmeister R, Hense I. Modeling the Role of pH on Baltic Sea Cyanobacteria. Life (Basel) 2015; 5:1204-17. [PMID: 25830591 PMCID: PMC4500135 DOI: 10.3390/life5021204] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/24/2015] [Accepted: 03/26/2015] [Indexed: 11/23/2022] Open
Abstract
We simulate pH-dependent growth of cyanobacteria with an ecosystem model for the central Baltic Sea. Four model components—a life cycle model of cyanobacteria, a biogeochemical model, a carbonate chemistry model and a water column model—are coupled via the framework for aquatic biogeochemical models. The coupled model is forced by the output of a regional climate model, based on the A1B emission scenario. With this coupled model, we perform simulations for the period 1968–2098. Our simulation experiments suggest that in the future, cyanobacteria growth is hardly affected by the projected pH decrease. However, in the simulation phase prior to 1980, cyanobacteria growth and N2-fixation are limited by the relatively high pH. The observed absence of cyanobacteria before the 1960s may thus be explained not only by lower eutrophication levels, but also by a higher alkalinity.
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Affiliation(s)
- Jana Hinners
- Institute for Hydrobiology and Fisheries Science, Center for Earth System Research and Sustainability, University of Hamburg, Große Elbstraße 133, 22767 Hamburg, Germany.
| | - Richard Hofmeister
- Institute for Hydrobiology and Fisheries Science, Center for Earth System Research and Sustainability, University of Hamburg, Große Elbstraße 133, 22767 Hamburg, Germany.
- Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany.
| | - Inga Hense
- Institute for Hydrobiology and Fisheries Science, Center for Earth System Research and Sustainability, University of Hamburg, Große Elbstraße 133, 22767 Hamburg, Germany.
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27
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Li J, Shimizu K, Akasako H, Lu Z, Akiyama S, Goto M, Utsumi M, Sugiura N. Assessment of the factors contributing to the variations in microcystins biodegradability of the biofilms on a practical biological treatment facility. BIORESOURCE TECHNOLOGY 2015; 175:463-472. [PMID: 25459856 DOI: 10.1016/j.biortech.2014.10.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 10/07/2014] [Accepted: 10/09/2014] [Indexed: 06/04/2023]
Abstract
This study revealed the biotic and abiotic parameters driving the variations in microcystins (MCs) biodegradability of a practical biological treatment facility (BTF). Results showed that similar trends of seasonal variation were seen for microcystin-LR (MCLR) biodegradability of biofilms on the BTF and indigenous MCLR-degrader population, where both peaks co-occurred in October, following the peaks of natural MCLR concentration and water temperature observed in August. The lag period might be required for accumulation of MCLR-degraders and MCLR-degrading enzyme activity. The MCLR-degrader population was correlated to temperature, MCLR and chlorophyll-a concentration in water where the biofilms submerged, indicating that these abiotic and biotic parameters exerted direct and/or indirect influences on seasonal variation in MCLR-biodegradability. In comparison, no effect of other co-existing MCs on biodegradation of one MC was observed. However, proliferation of MC-degraders along biodegradation processes positively responded to total amount of MCs, suggesting that multiple MCs contributed additively to MC-degrader proliferation.
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Affiliation(s)
- Jieming Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura, Ora-gun, Gunma 374-0193, Japan
| | - Haruna Akasako
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhijiang Lu
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Shohei Akiyama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Masafumi Goto
- Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Semarak, Kuala Lumpur 54100, Malaysia
| | - Motoo Utsumi
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Norio Sugiura
- Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Semarak, Kuala Lumpur 54100, Malaysia; Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
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28
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Sandrini G, Matthijs HCP, Verspagen JMH, Muyzer G, Huisman J. Genetic diversity of inorganic carbon uptake systems causes variation in CO2 response of the cyanobacterium Microcystis. THE ISME JOURNAL 2014; 8:589-600. [PMID: 24132080 PMCID: PMC3930318 DOI: 10.1038/ismej.2013.179] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 09/10/2013] [Accepted: 09/11/2013] [Indexed: 11/09/2022]
Abstract
Rising CO2 levels may act as an important selective factor on the CO2-concentrating mechanism (CCM) of cyanobacteria. We investigated genetic diversity in the CCM of Microcystis aeruginosa, a species producing harmful cyanobacterial blooms in many lakes worldwide. All 20 investigated Microcystis strains contained complete genes for two CO2 uptake systems, the ATP-dependent bicarbonate uptake system BCT1 and several carbonic anhydrases (CAs). However, 12 strains lacked either the high-flux bicarbonate transporter BicA or the high-affinity bicarbonate transporter SbtA. Both genes, bicA and sbtA, were located on the same operon, and the expression of this operon is most likely regulated by an additional LysR-type transcriptional regulator (CcmR2). Strains with only a small bicA fragment clustered together in the phylogenetic tree of sbtAB, and the bicA fragments were similar in strains isolated from different continents. This indicates that a common ancestor may first have lost most of its bicA gene and subsequently spread over the world. Growth experiments showed that strains with sbtA performed better at low inorganic carbon (Ci) conditions, whereas strains with bicA performed better at high Ci conditions. This offers an alternative explanation of previous competition experiments, as our results reveal that the competition at low CO2 levels was won by a specialist with only sbtA, whereas a generalist with both bicA and sbtA won at high CO2 levels. Hence, genetic and phenotypic variation in Ci uptake systems provide Microcystis with the potential for microevolutionary adaptation to changing CO2 conditions, with a selective advantage for bicA-containing strains in a high-CO2 world.
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Affiliation(s)
- Giovanni Sandrini
- Department of Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Hans C P Matthijs
- Department of Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Jolanda M H Verspagen
- Department of Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Gerard Muyzer
- Department of Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Jef Huisman
- Department of Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands.
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29
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Li J, Peng L, Li J, Qiao Y. Divergent responses of functional gene expression to various nutrient conditions during microcystin-LR biodegradation by Novosphingobium sp. THN1 strain. BIORESOURCE TECHNOLOGY 2014; 156:335-341. [PMID: 24530889 DOI: 10.1016/j.biortech.2013.12.118] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 12/23/2013] [Accepted: 12/27/2013] [Indexed: 06/03/2023]
Abstract
To better understand the mechanisms for microcystin-LR (MCLR) biodegradation, the linkage between MCLR-biodegradation kinetics and functional gene expression dynamics was originally investigated with Novosphingobium sp. THN1 as inoculum under various nutrient conditions. Along biodegradation, mlrA gene expression, coupled with mlrD, presented similar trend but was regulated differentially among different conditions. Good positive correlation was observed between MCLR degraded and induction ratios of functional genes until 42h at respective condition. Compared to those under nutrient-free condition, the stimulated or decelerated biodegradation with dipotassium phosphate (DP) or ammonium chloride (AC) (both at 100mg L(-1)) was related to higher or lower up-regulation in mlr gene expression, suggesting that divergent mlr gene expression was one of the reasons for different effects of DP or AC on degradation. However, stimulated degradation with sodium nitrate (100mg L(-1)) might involve other mechanisms where mlr expression was not the decisive prerequisite to govern MCLR-biodegradation.
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Affiliation(s)
- Jieming Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Liujing Peng
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Ji Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Yuhui Qiao
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
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30
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Liang Z, Liu Y, Ge F, Xu Y, Tao N, Peng F, Wong M. Efficiency assessment and pH effect in removing nitrogen and phosphorus by algae-bacteria combined system of Chlorella vulgaris and Bacillus licheniformis. CHEMOSPHERE 2013; 92:1383-1389. [PMID: 23751125 DOI: 10.1016/j.chemosphere.2013.05.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 05/10/2013] [Accepted: 05/12/2013] [Indexed: 06/02/2023]
Abstract
To achieve better removal of NH4(+) and TP in wastewater, a new algae-bacteria combined system of Chlorella vulgaris and Bacillus licheniformis was investigated in a 6-d experiment. The results showed that 78% of NH4(+) could be removed in the combined system, while 29% in single algae system and only 1% in single bacteria system. Approximately 92% of TP was removed in the combined system, compared with 55% and 78% in single algae and bacteria system, respectively. B. licheniformis was proven to be a growth-promoting bacterium for C. vulgaris by comparing Chl a concentrations in the single and combined systems. In the removal process, pH of the combined system was observed to reduce significantly from 7.0 to 3.5. Whereas with pH regulated to 7.0, higher removal efficiencies of NH4(+) (86%) and TP (93%) were achieved along with the recovery of algal cells and the increase of Chl a. These results suggest that nutrients in wastewater can be removed efficiently by the algae-bacteria combined system and pH control is crucial in the process.
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Affiliation(s)
- Zhijie Liang
- Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, PR China
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31
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Han F, Huang J, Li Y, Wang W, Wan M, Shen G, Wang J. Enhanced lipid productivity of Chlorella pyrenoidosa through the culture strategy of semi-continuous cultivation with nitrogen limitation and pH control by CO2. BIORESOURCE TECHNOLOGY 2013; 136:418-24. [PMID: 23567711 DOI: 10.1016/j.biortech.2013.03.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 03/03/2013] [Accepted: 03/05/2013] [Indexed: 05/24/2023]
Abstract
Microalgae cultivation with high lipid productivity has received much attention in recent years owing to the economic potential of biofuels production and CO2 emission reduction. Previous studies had reported that the ways of pH-regulation, nutrition-limitation and semi-continuous culture mode can either increase the cells growth rate or promote lipid accumulation. In this study, the novel culture strategy of integrating both nutrition limitation and pH-regulation by CO2 in a semi-continuous cultivation was investigated for enhancing the lipid productivity. In the batch culture, the best growth performance was achieved by controlling pH at 7; lipid contents of the cells can be increased under the nitrogen-limitation conditions. The maximum lipid productivity of 115 mg L(-1) d(-1) was achieved in the novel culture strategy of semi-continuous cultivation with nitrogen-limitation and pH-regulation by CO2, which was 3.64-fold higher than that in the batch culture without pH control and nitrogen limitation.
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Affiliation(s)
- Feifei Han
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China.
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32
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Li J, Shimizu K, Sakharkar MK, Utsumi M, Zhang Z, Sugiura N. Comparative study for the effects of variable nutrient conditions on the biodegradation of microcystin-LR and concurrent dynamics in microcystin-degrading gene abundance. BIORESOURCE TECHNOLOGY 2011; 102:9509-9517. [PMID: 21865029 DOI: 10.1016/j.biortech.2011.07.112] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2011] [Revised: 07/26/2011] [Accepted: 07/29/2011] [Indexed: 05/31/2023]
Abstract
Microcystin-LR (MCLR) degradation capability of biofilm was investigated with and without additional nutrients (nitrate, ammonium, peptone and glucose) at concentrations of 100 and 1000 mg L(-1). The MCLR-degradation was stimulated with nitrate and inhibited with other nutrients, except for that glucose of low concentration had no obvious effect. Both stimulatory and inhibitory effects enhanced with increasing concentration of corresponding nutrient. Quantitative polymerase chain reaction (qPCR) indicated that enhanced inhibition in biodegradation correlated to increased inhibition in functional gene (mlrA) abundance, as nutrient concentration increased. Stimulated biodegradation under low nitrate concentration may result from more rapid increase in mlrA gene abundance. These suggested that MCLR-degradation largely depended upon responsible bacterial population, which was affected by population of other bacteria in biofilm according to 16S rDNA-targeting qPCR. However, inhibited mlrA gene abundance implied that the stimulated biodegradation under high nitrate concentration might be involved in the mechanisms not related to MCLRDB population.
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Affiliation(s)
- Jieming Li
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Tennodai 1-1-1, Ibaraki 3058572, Japan
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