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Li C, Hu Z, Gao Y, Ma Y, Pan X, Li X, Liu S, Chu B. Bioeffects of Static Magnetic Fields on the Growth and Metabolites of C. pyrenoidosa and T. obliquus. J Biotechnol 2022; 351:1-8. [DOI: 10.1016/j.jbiotec.2022.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 04/07/2022] [Accepted: 04/07/2022] [Indexed: 10/18/2022]
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2
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Bauer LM, Rodrigues E, Rech R. Potential of immobilized Chlorella minutissima for the production of biomass, proteins, carotenoids and fatty acids. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Bretherton L, Hillhouse J, Bacosa H, Setta S, Genzer J, Kamalanathan M, Finkel ZV, Quigg A. Growth dynamics and domoic acid production of Pseudo-nitzschia sp. in response to oil and dispersant exposure. HARMFUL ALGAE 2019; 86:55-63. [PMID: 31358277 DOI: 10.1016/j.hal.2019.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 05/09/2019] [Accepted: 05/13/2019] [Indexed: 06/10/2023]
Abstract
The diatom genus Pseudo-nitzschia is a common component of phytoplankton communities in the Gulf of Mexico and is potentially toxic as some species produce the potent neurotoxin domoic acid. The impact of oil and chemical dispersants on Pseudo-nitzschia spp. and domoic acid production have not yet been studied; preliminary findings from a mesocosm experiment suggest this genus may be particularly resilient. A toxicological study was conducted using a colony of Pseudo-nitzschia sp. isolated from a station off the coast of Louisiana in the Gulf of Mexico. The cultures were exposed to a water accommodated fraction (WAF) of oil and a diluted chemically enhanced WAF (DCEWAF) which was a mix of oil and dispersant (20:1). Exposure to WAF induced a lag phase but did not inhibit growth rates once in exponential growth. Cultures grown in DCEWAF did not experience a lag phase but had significantly lower growth rates than the Control and WAF cultures. The cellular quota of domoic acid was higher in cultures treated with DCEWAF and WAF relative to their control values, and half of the domoic acid had leaked out of the cells into the surrounding seawater in the DCEWAF cultures while all the domoic acid remained inside the cells in WAF-treated cultures. These results suggest that the presence of oil could lead to toxic blooms, but that the application of dispersant could decrease bioaccumulation of domoic acid through the food web.
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Affiliation(s)
- Laura Bretherton
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX, 77554, USA.
| | - Jessica Hillhouse
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX, 77554, USA
| | - Hernando Bacosa
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX, 77554, USA
| | - Samantha Setta
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX, 77554, USA
| | - Jennifer Genzer
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX, 77554, USA
| | - Manoj Kamalanathan
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX, 77554, USA
| | - Zoe V Finkel
- Department of Oceanography, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Antonietta Quigg
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX, 77554, USA; Department of Oceanography, Texas A&M University, College Station, TX, 77843 USA
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Huang S, Kong W, Yang Z, Yu H, Li F. Combination of Logistic and modified Monod functions to study Microcystis aeruginosa growth stimulated by fish feed. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 167:146-160. [PMID: 30317119 DOI: 10.1016/j.ecoenv.2018.09.119] [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: 08/16/2018] [Revised: 09/26/2018] [Accepted: 09/27/2018] [Indexed: 06/08/2023]
Abstract
The ecological health of aquaculture water is threatened by wasted fish feed and herbicides. In order to study the effect of prometryn and fish feed on Microcystis aeruginosa growth based on Monod and Logistic functions, four different concentrations of prometryn (0, 50, 100 and 200 μg L-1) and two different dosages of fish feed (0.075 g, 0.15 g; d < 0.85 mm) were added into the culture medium, and the fish feed was the source of nitrogen and phosphorus in the MII medium. Results showed that Microcystis aeruginosa growth can be fitted well by Logistic and modified Logistic functions with 0-200 μg L-1 prometryn (R2 = 0.981-0.998 and R2 = 0.989-0.999, respectively). With the same concentration of prometryn, the maximum algae density (Nmax) of Microcystis aeruginosa calculated by both Logistic and modified Logistic functions increased with increasing dosage of fish feed and with the same dosage of fish feed, Nmax declined with increasing concentrations of prometryn. Inhibition of prometryn on algae growth stimulated by fish feed is of double concentration-dependence, inhibition rates (I) are lower in 0.15 g fish feed medium than 0.75 g ones generally, implying that more nutrients can alleviate the stress caused by prometryn on algae. Derived formula for the specific growth rate, growth rate and inhibition rate using modified Logistic function agreed reasonably well with measured data. Jointly application of modified Monod and Logistic functions can better describe the relationship between specific growth rates and nutrients concentrations compared to combination of Monod and Logistic functions. In addition, equations for describing variations of nutrients concentrations (PO43--P and NH4+-N) with time were also derived based on both modified Monod and Logistic functions, which agree reasonably well with the measured data. In sum, the combination of modified Monod and Logistic functions provides a promising and robust method in studying algal growth stimulated by fish feed in incubator experiments.
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Affiliation(s)
- Suiliang Huang
- Key Laboratory of Pollution Processes and Environmental Criteria of the Ministry of Education, Key Laboratory of Urban Ecological Environment Rehabilitation and Pollution Control of Tianjin, Numerical Simulation Group for Water Environment, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Wenwen Kong
- Key Laboratory of Pollution Processes and Environmental Criteria of the Ministry of Education, Key Laboratory of Urban Ecological Environment Rehabilitation and Pollution Control of Tianjin, Numerical Simulation Group for Water Environment, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Zhenjiang Yang
- Key Laboratory of Pollution Processes and Environmental Criteria of the Ministry of Education, Key Laboratory of Urban Ecological Environment Rehabilitation and Pollution Control of Tianjin, Numerical Simulation Group for Water Environment, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Hui Yu
- Key Laboratory of Pollution Processes and Environmental Criteria of the Ministry of Education, Key Laboratory of Urban Ecological Environment Rehabilitation and Pollution Control of Tianjin, Numerical Simulation Group for Water Environment, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Fengyuan Li
- Key Laboratory of Pollution Processes and Environmental Criteria of the Ministry of Education, Key Laboratory of Urban Ecological Environment Rehabilitation and Pollution Control of Tianjin, Numerical Simulation Group for Water Environment, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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Study on Microcystis aeruginosa growth in incubator experiments by combination of Logistic and Monod functions. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.10.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bretherton L, Williams A, Genzer J, Hillhouse J, Kamalanathan M, Finkel ZV, Quigg A. Physiological response of 10 phytoplankton species exposed to macondo oil and the dispersant, Corexit. JOURNAL OF PHYCOLOGY 2018; 54:317-328. [PMID: 29464721 DOI: 10.1111/jpy.12625] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 02/07/2018] [Indexed: 06/08/2023]
Abstract
Culture experiments were conducted on ten phytoplankton species to examine their biological and physiological responses during exposure to oil and a combination of oil and dispersant. The species tested included a range of taxa typically found in the Gulf of Mexico such as cyanobacteria, chlorophytes, and diatoms. Cultures were exposed to Macondo surrogate oil using the water accommodated fraction (WAF), and dispersed oil using a chemically enhanced WAF (CEWAF) and diluted CEWAF, to replicate conditions following the Deepwater Horizon spill in the Gulf of Mexico. A range of responses were observed, that could broadly class the algae as either "robust" or "sensitive" to oil and/or dispersant exposure. Robust algae were identified as Synechococcus elongatus, Dunaliella tertiolecta, two pennate diatoms Phaeodactylum tricornutum and Navicula sp., and Skeletonema grethae CCMP775, and were largely unaffected by any of the treatments (no changes to growth rate or time spent in lag phase relative to controls). The rest of the phytoplankton, all centric diatoms, exhibited at least some combination of reduced growth rates or increased lag time in response to oil and/or dispersant exposure. Photophysiology did not have a strong treatment effect, with significant inhibition of photosynthetic efficiency (Fv /Fm ) only observed in the CEWAF, if at all. We found that the effects of oil and dispersants on phytoplankton physiology were species-dependent, and not always detrimental. This has significant implications on how oil spills might impact phytoplankton community structure and bloom dynamics in the Gulf of Mexico, which in turn impacts higher trophic levels.
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Affiliation(s)
- Laura Bretherton
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, 77553, USA
| | - Alicia Williams
- Department of Marine Sciences, University of New England, Biddeford, Maine, 04005, USA
| | - Jennifer Genzer
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, 77553, USA
| | - Jessica Hillhouse
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, 77553, USA
| | - Manoj Kamalanathan
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, 77553, USA
| | - Zoe V Finkel
- Environmental Science, Mount Allison University, Sackville, New Brunswick, Canada, E4L 1E4
| | - Antonietta Quigg
- Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, 77553, USA
- Department of Oceanography, Texas A&M University, College Station, Texas, 77843, USA
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Salgado P, Vázquez JA, Riobó P, Franco JM, Figueroa RI, Kremp A, Bravo I. A Kinetic and Factorial Approach to Study the Effects of Temperature and Salinity on Growth and Toxin Production by the Dinoflagellate Alexandrium ostenfeldii from the Baltic Sea. PLoS One 2015; 10:e0143021. [PMID: 26636674 PMCID: PMC4670228 DOI: 10.1371/journal.pone.0143021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 10/29/2015] [Indexed: 11/18/2022] Open
Abstract
Alexandrium ostenfeldii is present in a wide variety of environments in coastal areas worldwide and is the only dinoflagellate known species that produces paralytic shellfish poisoning (PSP) toxins and two types of cyclic imines, spirolides (SPXs) and gymnodimines (GYMs). The increasing frequency of A. ostenfeldii blooms in the Baltic Sea has been attributed to the warming water in this region. To learn more about the optimal environmental conditions favoring the proliferation of A. ostenfeldii and its complex toxicity, the effects of temperature and salinity on the kinetics of both the growth and the net toxin production of this species were examined using a factorial design and a response-surface analysis (RSA). The results showed that the growth of Baltic A. ostenfeldii occurs over a wide range of temperatures and salinities (12.5-25.5°C and 5-21, respectively), with optimal growth conditions achieved at a temperature of 25.5°C and a salinity of 11.2. Together with the finding that a salinity > 21 was the only growth-limiting factor detected for this strain, this study provides important insights into the autecology and population distribution of this species in the Baltic Sea. The presence of PSP toxins, including gonyautoxin (GTX)-3, GTX-2, and saxitoxin (STX), and GYMs (GYM-A and GYM-B/-C analogues) was detected under all temperature and salinity conditions tested and in the majority of the cases was concomitant with both the exponential growth and stationary phases of the dinoflagellate's growth cycle. Toxin concentrations were maximal at temperatures and salinities of 20.9°C and 17 for the GYM-A analogue and > 19°C and 15 for PSP toxins, respectively. The ecological implications of the optimal conditions for growth and toxin production of A. ostenfeldii in the Baltic Sea are discussed.
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Affiliation(s)
- Pablo Salgado
- Departamento de Medio Ambiente, División de Investigación en Acuicultura, Instituto de Fomento Pesquero (IFOP), Punta Arenas, Chile
- Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO), Vigo, Spain
| | - José A. Vázquez
- Grupo de Reciclado y Valorización de Materiales Residuales (REVAL), Instituto de Investigaciones Marinas (IIM-CSIC), Vigo, Spain
| | - Pilar Riobó
- Instituto de Investigaciones Marinas (IIM-CSIC), Vigo, Spain
| | - José M. Franco
- Instituto de Investigaciones Marinas (IIM-CSIC), Vigo, Spain
| | - Rosa I. Figueroa
- Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO), Vigo, Spain
| | - Anke Kremp
- Marine Research Centre, Finnish Environment Institute (SYKE), Helsinki, Finland
| | - Isabel Bravo
- Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO), Vigo, Spain
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Pi Y, Xu N, Bao M, Li Y, Lv D, Sun P. Bioremediation of the oil spill polluted marine intertidal zone and its toxicity effect on microalgae. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2015; 17:877-885. [PMID: 25786771 DOI: 10.1039/c5em00005j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Custom-designed devices with 0.6 m (L) × 0.3 m (W) × 0.4 m (H) and a microbial consortium were applied to simulate bioremediation on the oil spill polluted marine intertidal zone. After the bioremediation, the removal efficiency of n-alkanes and polycyclic aromatic hydrocarbon homologues in crude oil evaluated by GC-MS were higher than 58% and 41% respectively. Besides, the acute toxicity effects of crude oil on three microalgae, i.e. Dicrateria sp., Skeletonema costatum and Phaeodactylum tricornutum, varied with concentration. The effects of microbe and surfactant treated water on the three microalgae followed a decreasing order: the microbial consortium plus Tween-80 > the microbial consortium > Tween-80. During 96 h, the cell densities of the three microalgae in treated seawater increased from 4.0 × 10(5), 1.0 × 10(5) and 2.5 × 10(5) cells per mL to 1.7 × 10(6), 8.5 × 10(5) and 2.5 × 10(6) cells per mL, respectively, which illustrated that the quality of seawater contaminated by crude oil was significantly improved by the bioremediation.
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Affiliation(s)
- Yongrui Pi
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 238 Songling Road, Qingdao 266100, Shandong, China.
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Vázquez JA, Rial D. Inhibition of selected bacterial growth by three hydrocarbons: mathematical evaluation of toxicity using a toxicodynamic equation. CHEMOSPHERE 2014; 112:56-61. [PMID: 25048888 DOI: 10.1016/j.chemosphere.2014.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/27/2014] [Accepted: 03/02/2014] [Indexed: 06/03/2023]
Abstract
The individual toxicity of different hydrocarbons (naphthalene, cyclododecane and aniline) on the growth of selected bacteria (Pseudomonas sp., Phaeobacter sp. and Leuconostoc mesenteroides) was studied by means of a toxicodynamic model combination of two sigmoid equations (logistic and Weibull). All the toxicological effects on growth parameters and kinetic properties were characterized and the global toxicity of such chemicals was evaluated. It was observed that two kinetic parameters (maximum growth and maximum growth rate) were in almost all cases influenced by the hydrocarbons studied. Aniline was less toxic than cyclododecane and naphthalene. The presented approach is a reasonable starting point for understanding and modeling complete and real assessment of chemical toxic effects on bacterial growths. The values of EC50,τ could be used for a most efficient comparison of the individual toxicity of chemicals.
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Affiliation(s)
- José A Vázquez
- Grupo de Reciclado e Valorización de Residuos (REVAL), Instituto de Investigacións Mariñas (IIM-CSIC), C/Eduardo Cabello 6, CP36208 Vigo, Spain.
| | - Diego Rial
- Grupo de Reciclado e Valorización de Residuos (REVAL), Instituto de Investigacións Mariñas (IIM-CSIC), C/Eduardo Cabello 6, CP36208 Vigo, Spain
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