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Shift in Structural and Functional Diversity of Algal Community: An Ecophysiological Reason

  • Enketeswara SubudhiEmail author
  • Mahendra Gaur
  • Rajesh Kumar Sahoo
  • Mohit Kumar
Chapter

Abstract

Cyanobacteria are the most ancient lineages of the domain Bacteria and have been playing a crucial role in shaping our planet through their highly proliferating nature in harsh environmental conditions because of their adaptability to grow along with other photosynthetic and heterotrophic microbial community with varied ranges of salinity, pH, temperature, radiation, and water potential. Rise in temperature is reported to be the deciding factor in bringing down the microbial community diversity of hot springs. In the present study, for the first time, we reported the current status of the variability in community structure and predicted metabolic activity among cyanobacteria population of two sulfur hot springs, Atri at 48 °C and Taptapani at 58 °C, from the state of Odisha, Eastern India, using metagenomic approach. We further tried to establish the relationship between the differential occurrences of cyanobacteria clades with those of coexisting non-cyanobacteria clades chloroflexi from our previously published findings of hot spring microbial diversity analysis.

Predominance of thermophilic Leptolyngbya (96.25%) in Atri and prevalence of mesophilic Arthronema (83.81%) in Taptapani, as discovered through 16S rRNA amplicon sequencing of their community DNA, as a function of temperature, are the interesting features of the present study. Such differential presence of cyanobacteria community in these two hot springs can be correlated with unequal existence of some non-cyanobacteria members’ chloroflexi, as well as with possible influence of physiochemical parameters, more specifically temperature. Variation in cyanobacteria diversity and composition of these hot springs as revealed through sequence analysis were also evinced by respective differences in richness, evenness, and Shannon’s diversity indices. The two tropical sulfur-rich hot springs, Taptapani (48 °C) harboring mesophiles and Atri (58 °C) comprising thermophiles, provide an opportunity to understand the ecophysiological reasons behind the differences in structural and functional profile of cyanobacteria community.

Keywords

Cyanobacteria Hot spring Taptapani Atri Metagenomics 

Notes

Acknowledgments

We are thankful to our president, Siksha ‘O’ Anusandhan (Deemed to be University), SPS for their encouragement throughout in carrying out this work.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Enketeswara Subudhi
    • 1
    Email author
  • Mahendra Gaur
    • 1
  • Rajesh Kumar Sahoo
    • 1
  • Mohit Kumar
    • 2
  1. 1.Centre for BiotechnologySiksha ‘O’ Anusandhan (Deemed to be University)BhubaneswarIndia
  2. 2.Shiv Aastha Hospital & Research CenterJindIndia

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