Rain-fed granite rock basins accumulate a high diversity of dormant microbial eukaryotes

Journal article


Velasco-González, Ismael, Sanchez-Jimenez, Abel, Singer, David, Murciano, Antonio, Díez-Hermano, Sergio, Lara, Enrique and Martín-Cereceda, Mercedes 2019. Rain-fed granite rock basins accumulate a high diversity of dormant microbial eukaryotes. Environmental Microbiology. https://doi.org/10.1007/s00248-019-01463-y
AuthorsVelasco-González, Ismael, Sanchez-Jimenez, Abel, Singer, David, Murciano, Antonio, Díez-Hermano, Sergio, Lara, Enrique and Martín-Cereceda, Mercedes
Abstract

Rain fed granite rock basins are ancient geological landforms of worldwide distribution and structural simplicity. They support habitats that can switch quickly from terrestrial to aquatic along the year. Diversity of animals and plants, and the connexion between communities in different basins have been widely explored in these habitats, but hardly any research has been carried out on microorganisms. The aim of this study is to provide the first insights on the diversity of eukaryotic microbial communities from these environments. Due to the ephemeral nature of these aquatic environments, we predict that the granitic basins should host a high proportion of dormant microeukaryotes. Based on an environmental DNA diversity survey, we reveal diverse communities with representatives of all major eukaryotic taxonomic supergroups, mainly composed of a diverse pool of low abundance OTUs. Basin communities were very distinctive, with alpha and beta diversity patterns non-related to basin size or spatial distance respectively. Dissimilarity between basins was mainly characterised by turnover of OTUs. The strong microbial eukaryotic heterogeneity observed among the basins may be explained by a complex combination of deterministic factors (diverging environment in the basins), spatial constraints, and randomness including founder effects. Most interestingly, communities contain organisms that cannot coexist at the same time because of incompatible metabolic requirements, thus suggesting the existence of a pool of dormant organisms whose activity varies along with the changing environment. These organisms accumulate in the pools, which turns granitic rock into high biodiversity microbial islands whose conservation and study deserve further attention.

KeywordsEcology; Soil Science; Ecology, Evolution, Behavior and Systematics
Year2019
JournalEnvironmental Microbiology
Microbial Ecology
PublisherSpringer Science and Business Media LLC
ISSN0095-3628
1432-184X
Digital Object Identifier (DOI)https://doi.org/10.1007/s00248-019-01463-y
Web address (URL)http://hdl.handle.net/10545/624615
http://www.springer.com/tdm
hdl:10545/624615
Publication dates03 Dec 2019
Publication process dates
Deposited20 Mar 2020, 09:16
Accepted11 Nov 2019
ContributorsDepartamento de Genética, Fisiología y Microbiología. Facultad de Ciencias Biológicas, Universidad Complutense de Madrid (UCM), C/ José Antonio Novais 12, 28040, Madrid, Spain, Departamento de Biodiversidad, Ecología y Evolución. Facultad de Ciencias Biológicas, UCM, Madrid, Spain, University of Neuchâtel, Rue Emile-Argand 11, CH-2000, Neuchâtel, Switzerland, University of São Paulo, São Paulo, 05508-090, Brazil and Real Jardín Botánico, CSIC Plaza de Murillo 2, 28014, Madrid, Spain
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