1
|
Zhu S, Huang Q, Li T, Li M, Yang Q, Li X, Warren A, Pu B. Soil water content drives the spatiotemporal the distribution and community assembly of soil ciliates in the Nianchu River Basin, Qinghai-Tibet Plateau, China. PLoS One 2024; 19:e0299815. [PMID: 38985800 PMCID: PMC11236148 DOI: 10.1371/journal.pone.0299815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 02/15/2024] [Indexed: 07/12/2024] Open
Abstract
Ciliated protozoa (ciliates) are an ecologically important group of microeukaryotes that play roles in the flow of energy and nutrients in aquatic and terrestrial ecosystems. The community distribution and diversity of soil ciliates in the Nianchu River Basin were investigated by sampling four major habitats, i.e., grassland, farmland, wetland and sea buckthorn forest during May, August and October 2020. Cultivation identification and enumeration of soil ciliates were performed by the non-submerged culture method, in vivo observations and protargol silver staining, and direct counting methods, respectively. A total of 199 species were identified representing, 89 genera, 67 families, 31 orders and 11 classes. Haptorida was the dominant group with 35 species, accounting for 17.59% of the total. The results showed that the α and β diversity indices of soil ciliate communities in the Nianchu River Basin varied significantly in spatial distribution, but not in temporal distribution. Mantel test showed that soil water content, total nitrogen and organic matter were significantly correlated with soil ciliates. Soil water content was the main environmental factor driving the spatial distribution of soil ciliates. Co-occurrence network analysis showed that soil ciliate species in the Nianchu River Basin depend on each other in the relationship of solidarity and cooperation or ecological complementarity. Thus maintaining or enhancing the diversity and stability of the community. Community assembly shows that randomness process was an important ecological process driving soil ciliate community construction in the Nianchu River Basin.
Collapse
Affiliation(s)
- Shiying Zhu
- Department of Life Sciences, Plateau Zoology Laboratory, School of Ecology and Environment, Tibet University, Lhasa, China
| | - Qian Huang
- Department of Life Sciences, Plateau Zoology Laboratory, School of Ecology and Environment, Tibet University, Lhasa, China
| | - Tianshun Li
- Department of Life Sciences, Plateau Zoology Laboratory, School of Ecology and Environment, Tibet University, Lhasa, China
| | - Mingyan Li
- Department of Life Sciences, Plateau Zoology Laboratory, School of Ecology and Environment, Tibet University, Lhasa, China
| | - Qing Yang
- Laboratory of Wetland and Watershed Ecosystems of Tibetan Plateau, School of Ecology and Environment, Tibet University, Lhasa, China
- Center for Carbon Neutrality in the Third Pole of the Earth, Tibet University, Lhasa, China
| | - Xiaodong Li
- Laboratory of Wetland and Watershed Ecosystems of Tibetan Plateau, School of Ecology and Environment, Tibet University, Lhasa, China
- Center for Carbon Neutrality in the Third Pole of the Earth, Tibet University, Lhasa, China
| | - Alan Warren
- Department of Life Sciences, Natural History Museum, London, United Kingdom
| | - Bu Pu
- Department of Life Sciences, Plateau Zoology Laboratory, School of Ecology and Environment, Tibet University, Lhasa, China
| |
Collapse
|
2
|
An Overview on Methanotrophs and the Role of Methylosinus trichosporium OB3b for Biotechnological Applications. BIOTECHNOL BIOPROC E 2022. [DOI: 10.1007/s12257-022-0046-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
3
|
Lopéz-Peréz PA, Rodriguez-Mata AE, Hernández-González O, Amabilis-Sosa LE, Baray-Arana R, Leon-Borges J. Design of a Robust sliding mode controller for bioreactor cultures in overflow metabolism via an interdisciplinary approach. OPEN CHEM 2022. [DOI: 10.1515/chem-2021-0098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Microorganism culture is highly complex due to the different metabolic pathways, which are very complex. A metabolic phenomenon called overflow is a challenge to overcome in automatic control tasks of microorganism cultures. In this study, a nonlinear algorithm by sliding modes (sliding mode nonlinear control, SMNC) is proposed for the robust regulation of a fed-batch bioreactor in the presence of parametric and system perturbations. A control design is obtained using Lyapunov functions by techniques to propose a control law such that it is robust, only the output signals (biomass and volume) are used, and the reaction rates do not have to be wholly known. Therefore, a novel and simple controller capable of solving the above problems is obtained.
Collapse
Affiliation(s)
- Pablo Antonio Lopéz-Peréz
- Universidad Autonoma del Estado de Hidalgo. Escuela Superior de Apan, Ubicado en Chimalpa Tlalayote, Municipio de Apan Hidalgo , Apan , Mexico
| | | | - Omar Hernández-González
- CONACYT-Tecnológico Nacional de México/Instituto Tecnológico de Hermosillo , Hermosillo , Sonora , México
| | - Leonel E. Amabilis-Sosa
- CONACYT-Tecnológico Nacional de México/Instituto Tecnológico de Culiacán , 80220 Culiacán Rosales , Sinaloa , Mexico
| | - Rogelio Baray-Arana
- Tecnológico Nacional de México/Instituto Tecnológico de Chihuahua , 31200 Chihuahua , Sinaloa , Mexico
| | - Jesus Leon-Borges
- Universidad de Quintana Roo, División de Ciencias, Ingeniería y Tecnología , Cancun , Quintana Roo , Mexico
| |
Collapse
|
4
|
Salem R, Soliman M, Fergala A, Audette GF, ElDyasti A. Screening for Methane Utilizing Mixed Communities with High Polyhydroxybutyrate (PHB) Production Capacity Using Different Design Approaches. Polymers (Basel) 2021; 13:1579. [PMID: 34069256 PMCID: PMC8157138 DOI: 10.3390/polym13101579] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 12/04/2022] Open
Abstract
With the adverse environmental ramifications of the use of petroleum-based plastic outweighing the challenges facing the industrialization of bioplastics, polyhydroxyalkanoate (PHA) biopolymer has gained broad interest in recent years. Thus, an efficient approach for maximizing polyhydroxybutyrate (PHB) polymer production in methanotrophic bacteria has been developed using the methane gas produced in the anaerobic digestion process in wastewater treatment plants (WWTPS) as a carbon substrate and an electron donor. A comparison study was conducted between two experimental setups using two different recycling strategies, namely new and conventional setups. The former setup aims to recycle PHB producers into the system after the PHB accumulation phase, while the latter recycles the biomass back into the system after the exponential phase of growth or the growth phase. The goal of this study was to compare both setups in terms of PHB production and other operational parameters such as growth rate, methane uptake rate, and biomass yield using two different nitrogen sources, namely nitrate and ammonia. The newly proposed setup is aimed at stimulating PHB accumulating type II methanotroph growth whilst enabling other PHB accumulators to grow simultaneously. The success of the proposed method was confirmed as it achieved highest recorded PHB accumulation percentages for a mixed culture community in both ammonia- and nitrate-enriched media of 59.4% and 54.3%, respectively, compared to 37.8% and 9.1% for the conventional setup. Finally, the sequencing of microbial samples showed a significant increase in the abundance of type II methanotrophs along with other PHB producers, confirming the success of the newly proposed technique in screening for PHB producers and achieving higher PHB accumulation.
Collapse
Affiliation(s)
- Rana Salem
- Civil Engineering Department, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada; (R.S.); (M.S.)
| | - Moomen Soliman
- Civil Engineering Department, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada; (R.S.); (M.S.)
| | - Ahmed Fergala
- Department of Biotechnology, Delft University of Technology, Mekelweg 5, 2628 CD Delft, The Netherlands;
| | - Gerald F. Audette
- Chemistry Department, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada;
| | - Ahmed ElDyasti
- Civil Engineering Department, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada; (R.S.); (M.S.)
| |
Collapse
|
5
|
AlSayed A, Fergala A, Eldyasti A. Enhancement of the cultivation process conditions of mixed culture methanotrophic Proteobacteria phylum enriched from waste activated sludge as the first step for value added recovery process. J Biosci Bioeng 2019; 127:602-608. [DOI: 10.1016/j.jbiosc.2018.10.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 10/08/2018] [Accepted: 10/24/2018] [Indexed: 12/14/2022]
|
6
|
Fergala A, AlSayed A, Khattab S, Ramirez M, Eldyasti A. Development of Methane-Utilizing Mixed Cultures for the Production of Polyhydroxyalkanoates (PHAs) from Anaerobic Digester Sludge. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12376-12387. [PMID: 30339372 DOI: 10.1021/acs.est.8b04142] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The fundamental components required for scaling up the production of biogas-based biopolymers can be provided through a single process, that is, anaerobic digestion (AD). In this research, the possibility of enriching methane-utilizing mixed cultures from the AD process was explored as well as their capability to accumulate polyhydroxyalkanoates (PHAs). For almost 70 days of operation in a fed-batch cyclic mode, the specific growth rate was 0.078 ± 0.005 h-1 and the biomass yield was 0.7 ± 0.08 mg-VSS/mg-CH4. Adjusting the nitrogen levels in AD centrate resulted in results comparable to those obtained with a synthetic medium. The enriched culture could accumulate up to 51 ± 2% PHB. On the other hand, when the culturing medium was supplemented with valeric acid, the enriched bacteria were able to produce polyhydroxybutyrate- co-valerate (PHBV) up to 52 ± 6% with an HV percentage of 33 ± 5%. Increasing the valeric acid concentration in the culturing medium above 100 mg/L decreased the overall amount of PHBV by 60%, whereas the number of HV units incorporated was not affected. Changing the methane-to-oxygen ratio (M/O) from 1:1 to 4:1 caused an almost 80% decline in PHB accumulation. In addition, M/O had a significant effect on the fraction composition of PHBV at different valeric acid concentrations.
Collapse
Affiliation(s)
- Ahmed Fergala
- Department of Civil Engineering, Lassonde School of Engineering , York University , Toronto , Ontario Canada M3J 1P3
| | - Ahmed AlSayed
- Department of Civil Engineering, Lassonde School of Engineering , York University , Toronto , Ontario Canada M3J 1P3
| | - Saif Khattab
- Department of Chemical Engineering , Ryerson University , 350 Victoria Street , Toronto , Ontario Canada M5B 2K3
| | - Megan Ramirez
- Department of Environmental Engineering , Universidad International , Cuernavaca , Morelos , Mexico
| | - Ahmed Eldyasti
- Department of Civil Engineering, Lassonde School of Engineering , York University , Toronto , Ontario Canada M3J 1P3
| |
Collapse
|