Microbial communities Present in hydrothermal sediments from Deception Island,

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Vicente Sánchez, Javier and Martín‑González, Ana María and Celis Rodríguez, Miguel de and Alonso Conde, Alejandro and Marquina Díaz, Domingo and Santos de la Sen, Antonio (2021) Microbial communities Present in hydrothermal sediments from Deception Island,. Microorganisms, 9 (8). pp. 1-13. ISSN Electronic: 2076-2607

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Official URL: https://doi.org/10.3390/microorganisms9081631




Abstract

Deception Island is a geothermal location in Antarctica that presents active fumaroles, which confers unique characteristics to this habitat. Several studies about microbial communities in Antarctica have been carried out, nevertheless, Antarctic microbiota is still partially unknown. Here we present a multidisciplinary study about sediments obtained by deposition during 4 years in which several approaches have been considered for their characterization. First, a physicochemical characterization, using ionic chromatography and mass spectrometry for the determination of most abundant ions (chloride and sulphate) and elements (mainly silicon), was conducted. In addition, the total microbial community was studied using a metataxonomical approach, revealing a bacterial community dominated by Proteobacteria and Thaumarchaeota as the main archaeal genera and a fungal community mainly composed by Aspergillaceae. Culture-dependent studies showed low microbial diversity, only achieving the isolation of Bacillus-related species, some of them thermophilic, and the isolation of common fungi of Aspergillus or Penicillium spp. Furthermore, diatoms were detected in the sediment and characterized attending to their morphological characteristics using scanning electron microscopy. The study reveals a high influence of the physicochemical conditions in the microbial populations and their distribution, offering valuable data on the interaction between the island and water microbiota.


Item Type:Article
Uncontrolled Keywords:Hydrothermal sediment; Metataxonomic study; Microbial populations; Sediment characterization; Deception Island, Antarctica
Subjects:Medical sciences > Biology > Microbiology
ID Code:71424
Deposited On:22 Mar 2022 15:03
Last Modified:23 Mar 2022 10:08

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