Seasonal distribution and population dynamics of limnic microalgae and their association with physico-chemical parameters of river Noyyal through multivariate statistical analysis

Sureshkumar, Pandian; Thomas, Jibu

doi:10.1038/s41598-019-51542-w

Cited by 12 publications

(4 citation statements)

References 25 publications

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“…Our earlier study reported the diversity of microalgae species in catchment region os river Noyyal and their response to the seasonal variation in the physico -chemical characteristics of water (Kumar and Thomas, 2019). We also reported that microalgae were characterized by high H index, lower Simpson dominance value and Margalef index value with indefnite patterns of annual variations.…”

Section: Discussionmentioning

confidence: 85%

“…Our earlier study reported the population dynamics and diversity indicies of 142 fresh water microalgae species of river Noyyal and their response to the seasonal variation with physico -chemical charactersicts of water (Kumar and Thomas 2019). The study also provided the checklist of microalgae in abundance, the distribution and community structure in the ve collection sites from catchment region of river Noyyal.…”

Section: Introductionmentioning

confidence: 99%

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Development of DNA barcode for freshwater microalgae species revealing it’s evolutionary insights on diversity in Noyyal river of Western ghats, India

Sureshkumar

Thomas

Bhakta

2022

Preprint

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The identification of microalgae is extremely difficult solely based on morphological features. DNA based classification is particularly performed for unveiling cryptic diversity at various taxonomic levels and identifying species where structural characteristics are few or difficult to ascertain. The efficiency of DNA barcoding in recognizing microalgae involves generation of multiple gene markers and phylogenetic approaches that are however attaining significance. In this study, the feasibility of using DNA markers to identify a diverse and also poorly known group of green microalgae isolated from freshwater of Siruvani, Coimbatore was evaluated. DNA extracted from 23 freshwater microalgae cultures (Karunya Algae Culture Collection) was amplified using 18S, 28S, ITS and 18S region specific for Chlorophyaceae with amplification success rate of 86.95%, 82.60%, 43.47% and 69.59% respectively. Ambiguity among the 22 out of 23 microalgae isolates was unveiled using the results generated from the phylogenetic analysis and morphological data, thus confirming the taxonomical identity. Generated sequences of KACC microalgae were deposited in GENBANK and BOLD database for further use as reference barcodes for microalgae identification. In conclusion our findings highlight barcode database as powerful tool in microalgae identification and further it uncover new perspectives in species diversity on a global scale.

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Section: Discussionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Development of DNA barcode for freshwater microalgae species revealing it’s evolutionary insights on diversity in Noyyal river of Western ghats, India

Sureshkumar

Thomas

Bhakta

2022

Preprint

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“…Cyanobacteria frequently accounted for over 80% of the total phytoplankton. Several potentially toxic genera, such as Microcystis, Cylindrospermopsis, Planktotrix, Planktolyngbya, and Anabaena, were dominant throughout our study period (Barros et The ecology of phytoplankton in aquatic environments is affected by seasonal changes, leading to uctuations in species diversity, evenness, the Shannon-Wiener index, and cell density (Sun et al 2023;SureshKumar et al 2019). Temperature is a signi cant factor that regulates the growth of phytoplankton (Somdee et al 2013;Wang et al 2023).…”

Section: Discussionmentioning

confidence: 97%

Phytoplankton community response to water physicochemical characteristics under seasonal variation at the Ubol Ratana Dam, Khon Kaen, Thailand

Somdee,

Butsat,

Somdee

2024

Preprint

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Water eutrophication is a significant environmental issue that impacts aquatic ecosystems worldwide. In this study, we aimed to investigate the relationships among the water physicochemical characteristics, phytoplankton community, and cyanotoxins in the Ubol Ratana Dam, Khon Kaen, Thailand, during the years 2022–2023 and to evaluate the relationships between changes in water parameters and the dynamics of the phytoplankton community under seasonal variations in the Ubol Ratana Dam. A total of 84 phytoplankton species belonging to 8 phyla were found in six different locations in the reservoir. Cyanobacteria (Cyanophyta) had the highest cell density (84.06%), with Microcystis aeruginosa being the dominant species. In terms of seasonality, the diversity indices, including Shannon‒Wiener and evenness values, were highest during summer and lowest during the rainy season, while species richness remained constant. Interestingly, the phytoplankton density was greater at the center of the dam and water outlet stations than that at the other stations, and these two areas also had the lowest nitrate and ammonium concentrations. Canonical correspondence analysis (CCA) explained 66.8%, 70.6%, and 63.8% of the total variation in the rainy, winter, and summer seasons, respectively. This indicates that nitrate and ammonium were factors that influenced phytoplankton growth. Correlation analysis revealed that the abundance of dominant cyanobacteria was positively correlated with temperature and orthophosphate content and negatively correlated with nitrate and ammonium content. Overall, nitrogen concentration mainly governed cyanobacterial blooms. These results suggest that relationships between physicochemical factors and the phytoplankton community significantly influence the seasonal variations in phytoplankton, providing valuable insights for future monitoring of phytoplankton blooms.

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“…Reactive silicate is still higher in seawaters and not a major factor determining the growth of the local diatom blooms. 29…”

Section: Of Total Microalgae Count With Physicochemical Propertiesmentioning

confidence: 99%

Effect of Physico-chemical Parameters on the Population Diversity of Potentially Harmful Micro-algae during Post-monsoon Season along the Malabar Coast

Sankaranarayanan¹,

Poyil²,

Karuppiah³

et al. 2021

J. Pure Appl. Microbiol.

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There are several toxic microalgae species known as Harmful algal bloom (HAB) causing serious effects to the environment and economy. Knowledge on these groups of marine micro-flora is scanty and several areas remain unexplored. The present study focuses on the analysis of microalgal diversity in the Malabar coastal areas at Southwest and Northeast monsoon. The diatoms, dinoflagellates and total microalgal population were analysed and quantified. Predominant species were identified. Physicochemical parameters of the seawater at different time intervals and Correlation between diatoms, dinoflagellates and total microalgae population with physicochemical parameters were identified. From the analysis, a total of 53 diatoms and 15 dinoflagellates were identified. The predominant species including toxic or harmful bloom-forming were found to be Dinophysis caudata, Noctiluca scintillans, Prorocentrum lima and Tripos furca. The total microalgae population varied from 18,592 cells/L to 7,832 cells/L in the months of April and December. Dinoflagellates were positively correlated with salinity (r = 0.848; p = 0.008), nitrite (r = 0.752; p = 0.032) and total phosphorous (r = 0.734, p = 0.038). Diatoms were positively correlated with temperature (r = 0.804; p = 0.016) and nitrate (r = 0.774, p = 0.024). Total microalgal density was positively correlated with temperature (r = 0.825; p = 0.012) and nitrate content (r = 0.811, p = 0.15).

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Seasonal distribution and population dynamics of limnic microalgae and their association with physico-chemical parameters of river Noyyal through multivariate statistical analysis

Cited by 12 publications

References 25 publications

Development of DNA barcode for freshwater microalgae species revealing it’s evolutionary insights on diversity in Noyyal river of Western ghats, India

Development of DNA barcode for freshwater microalgae species revealing it’s evolutionary insights on diversity in Noyyal river of Western ghats, India

Phytoplankton community response to water physicochemical characteristics under seasonal variation at the Ubol Ratana Dam, Khon Kaen, Thailand

Effect of Physico-chemical Parameters on the Population Diversity of Potentially Harmful Micro-algae during Post-monsoon Season along the Malabar Coast

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