Algal Diversity in Hot Springs of Odisha

Bhakta, S.; Das, Sudipta Kumar; Adhikary, S. P.

doi:10.20324/nelumbo/v58/2016/105914

Cited by 13 publications

(4 citation statements)

References 7 publications

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“…The hot spring complex in tropical north Queensland, Australia with the water temperature of 62.7°C at the hot spring vent whereas water temperature of 26°C at the downstream showed a strong anti-correlation with the richness of diatoms being no diatoms in the hot water at the vents (Negus et al, 2020), which was also observed by previous studies (Pentecost, 2005;Sterrenburg et al, 2007). The inverse relationship of warmer temperature and diatom richness have also been recorded from the hot springs of South Africa (Jonker et al, 2013); Kenya (Owen et al, 2004); Iceland, New Zealand, and Kenya (Owen et al, 2008); Kamchatka Peninsula (Nikulina et al, 2019); and Odisha, India (Bhakta et al 2016). The water temperature of 84°C in the thermal region, whereas the water temperature of 5°C in the cold region of the Puga hot spring (Craig et al, 2013), supports that cold water diatom species found in the Puga sinter sample could have resulted from secondary deposition rather than flourishing in hot water gushed from the vent.…”

Section: Diatomssupporting

confidence: 80%

Hot spring diatoms are linked to extreme cold conditions: A new perspective for astrobiological implication from the sinter deposit of Puga hot spring, Ladakh, India

Shukla,

Chaddha,

Kumar

et al. 2023

Preprint

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The hot springs are known to host a variety of organisms, such as Cyanobacteria, Archaea, and Eukaryotes. The growth and survival of these life forms in extreme environments, where spring water temperature and associated minerals play a significant role, provide analogous conditions like Mars and thus attract researchers to find the possible existence of life beyond the Earth. Many studies have therefore been conducted from the hot springs to understand the controlling factors for these organisms' survival, mainly Cyanobacteria, which are believed to be true thermophiles. However, little is known about diatoms, especially from the hot springs of India, as most of the studies have concentrated on the diversity and distribution of Cyanobacteria. Here, we present a study of diatoms using a geothermal vent sinter from the Puga hot spring of Ladakh, India. Our results suggest that the diatoms preserved in the geothermal vent sinter are less abundant with low diversity and, therefore, represented by a few species only. By correlating the ecological preferences of diatom species with the sinter's morphological characteristics and geochemical analyses, we conclude that these diatom species could be manifested through a secondary deposit on the geothermal vent sinter from the adjacent cold waters of the Puga hot spring. We propose that the temperature gradient could be a key parameter for the occurrence and survival of diatoms in the Puga geothermal vent sinter rather than the gushed hot water. Consequently, the mere presence of diatoms around the hot spring vent cannot be directly linked to their survival in extreme, i.e., hot water conditions. Therefore, eukaryotic forms like diatoms from the hot springs should be used with caution to elucidate the existence of life in extreme (hot water) conditions. In contrast, cold conditions around the hot spring may be the primary drivers for diatoms' survival, which can be used to infer astrobiological implications.

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Section: Diatomssupporting

confidence: 80%

Hot spring diatoms are linked to extreme cold conditions: A new perspective for astrobiological implication from the sinter deposit of Puga hot spring, Ladakh, India

Shukla,

Chaddha,

Kumar

et al. 2023

Preprint

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“…Mann. Most of these species have been reported in thermo-mineral systems by several authors (e.g., Villeneuve & Pienitz, 1998; Mpawenayo & Mathooko, 2004; Mannino, 2007; Quintela et al, 2013; Bhakta, Das & Adhikary, 2016; Angel et al, 2018). Centric diatoms like Aulacoseira granulata and Stephanodiscus neoastraea were found at CAD1, SSA and CAS, and were more abundant at CAS.…”

Section: Discussionmentioning

confidence: 89%

Diversity, ecology and distribution of benthic diatoms in thermo-mineral springs in Auvergne (France) and Sardinia (Italy)

Lai

Beauger

Wetzel

et al. 2019

PeerJ

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This study investigated and compared the diatom flora from thermo-mineral springs in Auvergne (France) and Sardinia (Italy). Samples were collected from rock/cobbles and fine sediments in 16 springs between January 2015 and March 2017. A total of 207 taxa (59 genera) were found. Multivariate analyses revealed significant differences in species composition and abundance among diatom assemblages both within each geographic region and between Auvergne and Sardinia (global R = 0.516; p = 0.002), suggesting the importance of local and climatic factors in species distribution. Based on abundance and common occurrence in multiple sites, some taxa can be considered more representative of springs in each region: Crenotia thermalis for Auvergne and Lemnicola exigua, Nitzschia amphibia, N. inconspicua and Rhopalodia operculata for Sardinia. pH, conductivity and HCO3− were the most significant environmental variables for diatom assemblages. Our results highlight the high heterogeneity of these spring systems. Future taxonomic insights can be useful to define the identity of some abundant and dominant taxa not identified at the species level in this study. Their identification is a crucial step for a more precise ecological characterization and comparison of these peculiar spring systems.

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“…Considering morphological traits, the isolated cyanobacterial cultures belong to the order Oscillatoriales (Oscillatoria formasa), Nostocales (Nostoc commune, Anabaena cylindrica, Fischerella thermalis). According to literature sources, the isolated cultures obtained from the Zharkent thermal springs containing hot water are present in diverse locations around the globe [15,16].…”

Section: Resultsmentioning

confidence: 99%

Cyanobacterial community structure and isolation of thermophilic cyanobacteria in the Zharkent geothermal spring

Seiilbek,

Akmukhanova,

Zayadan

et al. 2024

BIO Web Conf.

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Cyanobacterial biodiversity represents a significant reservoir for the potential discovery of new promising microorganism species. The purpose of this research is to explore the diversity of cyanobacteria and identify thermotolerant species found in the Zharkent geothermal spring situated in the Zhetysu region. At the time of water sampling from the spring, the temperature reached 75-80 °C. Cyanobacterial mats in the form of microbial agglomerations were identified on the stream periphery. Nine cyanobacterial species were found in these cyanobacterial mats, including Synechococcus, Phormidium, Gloeocapsa, Oscillatoria, Fischerella, and Nostoc. Among the cyanobacteria inhabiting the hot spring, 44% were non-heterocystous forms, while the rest exhibited heterocystous characteristics or were present as single-celled organisms. The order Oscillatoriales was the most predominant, including four species, followed by the order Chroococcales with three species. Pure cultures of cyanobacteria, such as Oscillatoria formasa, Nostoc commune, Anabaena cylindrica, and Fischerella thermalis, were isolated from the geothermal spring. These cultures were subjected to thermotolext56rance assessment at different temperatures. All examined strains exhibited a high growth rate at 45-50°C, with a slowdown at 55 and 60°C. The optimal growth temperature was 45-50°C, except for the Fischerella thermalis strain, which showed active growth at 60°C. The obtained results emphasize the potential application of the isolated strains in biotechnology.

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Algal Diversity in Hot Springs of Odisha

Cited by 13 publications

References 7 publications

Hot spring diatoms are linked to extreme cold conditions: A new perspective for astrobiological implication from the sinter deposit of Puga hot spring, Ladakh, India

Hot spring diatoms are linked to extreme cold conditions: A new perspective for astrobiological implication from the sinter deposit of Puga hot spring, Ladakh, India

Diversity, ecology and distribution of benthic diatoms in thermo-mineral springs in Auvergne (France) and Sardinia (Italy)

Cyanobacterial community structure and isolation of thermophilic cyanobacteria in the Zharkent geothermal spring

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