Seasonal variation in β-glucosidase-producing culturable bacterial diversity in a monsoon-influenced tropical estuary

Eswaran, Ranjith; Khandeparker, Lidita

doi:10.1007/s10661-019-7818-0

Cited by 14 publications

(8 citation statements)

References 43 publications

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“…Proteobacteria was the most dominant phyla in all the stations irrespective of the sampling period, with only marginal variations in the percentage of occurrence, with Betaproteobacteria, Alphaproteobacteria, and Gammaproteobacteria being the dominant classes. The dominance of Proteobacteria was in concurrence with reports from other tropical estuaries (Bouvier and del Giorgio 2002;Ghosh and Bhadury 2019;Ortmann and Santos 2016;Eswaran and Khandeparker 2019) and also from coastal waters of India (Sachithanandam et al 2020, Parvathi et al 2019. High abundance of Betaproteobacteria and Alphaproteobacteria in our study corroborated with previous studies from other estuarine regions (Sekiguchi et al 2002).…”

Section: Discussionsupporting

confidence: 92%

“…The present study examines seasonal and spatial variations in bacterial diversity with respect to physico-chemical gradients in the Cochin estuary. Though CE comprised of similar aquatic microbial phyla found within other aquatic environments (Eswaran and Khandeparker 2019;Meziti et al 2016;Savio et al 2015), it hosted variations in the relative abundance of bacterial communities with changes in estuarine hydrography and pollutants. The estuarine bacterial genera clearly fell into three distinct categories, Euryhaline/marine (Salinity > 20), mesohaline/brackish (Salinity = 5-20) and freshwater (Salinity = < 5) (See Station details and description for seasonal hydrography in the CE) (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Extensive studies have been carried out to reveal the bacterial diversity and community structure in many marine and lacustrine ecosystems (Bowman et al 2003;Acinas et al 2004;Heijs et al 2008;Bobrova et al 2016;Jeffries et al 2016). However, only few studies have addressed bacterial diversity from monsoonal estuaries , Bernhard et al 2005, Khandeparker et al 2017, Eswaran and Khandeparker 2019. Very little is known about the complex factors in uencing bacterial community composition or the effects these communities have on estuarine ecosystems (Dolan 2005;Teira et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India

Parvathi

Catena

Jasna

et al. 2021

Environ Sci Pollut Res

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In the present study, we analysed variations in bacterial community structure along a salinity gradient in a tropical monsoonal estuary (Cochin estuary, CE), on the southwest coast of India, using Illumina nextgeneration sequencing (NGS). Water samples were collected from eight different locations thrice a year, to assess the variability in the bacterial community structure and to determine the physico-chemical factors in uencing the bacterial diversity. Proteobacteria was the most dominant phyla in the estuary followed by Bacteroidetes, Cyanobacteria, Actinobacteria, and Firmicutes. Statistical analysis indicated signi cant variations in bacterial communities between freshwater, mesohaline and euryhaline regions, as well as between the monsoon (wet) and non-monsoon (dry) periods. Non-metric multidimensional scaling (NMDS) analysis demonstrated that the bacterial communities cluster according to different salinity regimes of the estuary. Canonical Correspondence analysis (CCA) showed a clear spatial and temporal variation in the distribution of bacterial communities in the CE. Abundance of Betaproteobacteria was high in the freshwater regions, while Gammaproteobacteria, Alphaproteobacteria and Epsilonproteobactera were more abundant in mesohaline and euryhaline regions of the estuary.Correlagram based on Pearson correlation analysis demonstrated the impact of different physicochemical variables on the distribution of dominant phyla, class and genera. Spatial and temporal variations in bacterial community structure could be due to regional variations in environmental conditions imparted by allochthonous inputs, monsoonal rainfall, and tidal in uence.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India

Parvathi

Catena

Jasna

et al. 2021

Environ Sci Pollut Res

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“…A recent metagenomic diversity study from 11 diverse global riverine waterways in different countries revels the similar results from our study region (Reddington et al 2020 ). Few recent studies also reported the culture-based diversity from the riverine regions (Eswaran and Khandeparker 2019 ; Chettri and Joshi 2022 ).…”

Section: Riverine Ecosystemmentioning

confidence: 99%

“…Due to microbial adaptability, seasonal fluctuations may have a noticeable impact on the patterns of the composition of microbial communities and accompanying ecological activities (Aguirre et al 2017 ). However, only a few studies have addressed bacterial diversity from Indian estuaries, and most of these studies are based on culture based approach (Eswaran and Khandeparker 2019 ; Khandeparker 2019; Thajudeen et al 2017 ).…”

Section: Estuarine Ecosystemmentioning

confidence: 99%

Bacterial diversity in the aquatic system in India based on metagenome analysis—a critical review

Jasna

Nathan

Parvathi

et al. 2023

Environ Sci Pollut Res

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Microbial analysis has become one of the most critical areas in aquatic ecology and a crucial component for assessing the contribution of microbes in food web dynamics and biogeochemical processes. Initial research was focused on estimating the abundance and distribution of the microbes using microscopy and culture-based analysis, which are undoubtedly complex tasks. Over the past few decades, microbiologists have endeavored to apply and extend molecular techniques to address pertinent questions related to the function and metabolism of microbes in aquatic ecology. Metagenomics analysis has revolutionized aquatic ecology studies involving the investigation of the genome of a mixed community of organisms in an ecosystem to identify microorganisms, their functionality, and the discovery of novel proteins. This review discusses the metagenomics analysis of bacterial diversity in and around different aquatic systems in India.

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Assessment of Chitinolytic Bacteria Isolated from Zooplankton of Freshwater Ecosystem

Midya¹,

Islam²

2021

River Health and Ecology in South Asia

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Seasonal variation in β-glucosidase-producing culturable bacterial diversity in a monsoon-influenced tropical estuary

Cited by 14 publications

References 43 publications

Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India

Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India

Bacterial diversity in the aquatic system in India based on metagenome analysis—a critical review

Assessment of Chitinolytic Bacteria Isolated from Zooplankton of Freshwater Ecosystem

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