Seasonal shift in physicochemical factors revealed the ecological variables that modulate the density of acinetobacter species in freshwater resources

Adewoyin, M.A.; Okoh, A.I.

Seasonal shift in physicochemical factors revealed the ecological variables that modulate the density of acinetobacter species in freshwater resources

dc.contributor.author	Adewoyin, M.A.
dc.contributor.author	Okoh, A.I.
dc.contributor.department	M A Adewoyin, A I Okoh: SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, Eastern Cape, South Africa.	en_US
dc.date.accessioned	2024-04-21T15:13:18Z
dc.date.available	2024-04-21T15:13:18Z
dc.date.epub	2020
dc.date.issued	2020-05-21
dc.description.abstract	Certain environmental variables are responsible for the survival of microorganisms in aquatic environments. The influence of these environmental factors in each season (winter, autumn, spring and summer) of the year can be used to track changes in a microbial population in freshwater resources. In this study, we assessed the effect of seasonal shifts in environmental variables including temperature, pH, total dissolved solids (TDS), total suspended solids (TSS), biochemical oxygen demand (BOD) and turbidity (TBS) among others on the density of Acinetobacter species in the Great Fish, Keiskamma and Tyhume rivers in the Eastern Cape Province, South Africa. Water samples and values of the environmental factors were taken from the rivers for 12 months. The density of presumptive Acinetobacter species was estimated from the culture of water samples on a CHROMagar selective medium, while the Acinetobacter-specific recA gene was targeted for the identification of Acinetobacter species using PCR assay. The multivariate relationship between seasons and changes in variables was created using PCA, while the effect of seasonal shifts in the environmental variables on the density of Acinetobacter species was evaluated using correlation test and topological graphs. Positive association patterns were observed between the seasons, environmental factors and the bacterial density in the rivers. In addition, temperature, TBS, TSS and BOD tended to influence the bacterial density more than other physicochemical factors in the rivers across the seasons. Of the total 1107 presumptive Acinetobacter species, 844 were confirmed as Acinetobacter species. Therefore, these findings suggested that the rivers contain Acinetobacter species that could be useful for basic and applied study in ecology or biotechnology, while their clinical relevance in causing diseases cannot be underestimated.	en_US
dc.description.sponsorship	The authors are sincerely grateful to the South Africa Medical Research Council (SAMRC) for financial support through grant SAMRC/UFH/P790, and to the University of Fort Hare.
dc.identifier.citation	Adewoyin MA, Okoh AI. Seasonal Shift in Physicochemical Factors Revealed the Ecological Variables that Modulate the Density of Acinetobacter Species in Freshwater Resources. Int J Environ Res Public Health. 2020 May 21;17(10):3606. doi: 10.3390/ijerph17103606	en_US
dc.identifier.doi	10.3390/ijerph17103606
dc.identifier.journal	Environmetal Reasearch and Public Health	en_US
dc.identifier.uri	https://pubmed.ncbi.nlm.nih.gov/32455589/
dc.identifier.uri	https://doi.org/10.3390/ijerph17103606
dc.identifier.uri	https://hdl.handle.net/11288/595894
dc.language.iso	en	en_US
dc.publisher	MDPI	en_US
dc.research.unit	Microbial Water Quality Monitoring	en_US
dc.rights	Attribution 3.0 United States	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/us/	*
dc.subject	Acinetobacter species
dc.subject	Correlation
dc.subject	Density
dc.subject	Freshwater resources
dc.subject	Seasonal shift
dc.subject	Physicochemical factors
dc.title	Seasonal shift in physicochemical factors revealed the ecological variables that modulate the density of acinetobacter species in freshwater resources	en_US
dc.type	Article	en_US