Selective Pressure Influences Inter-Biome Dispersal in the Assembly of Saline Microbial Communities.

Autor: Menéndez-Serra M; Ecology of the Global Microbiome-Department of Ecology and Complexity, Centre of Advanced Studies of Blanes (CEAB), Spanish Research Council (CSIC), Blanes, Catalonia, Spain.; Centre for Ancient Environmental Genomics, Globe Institute, University of Copenhagen, Copenhagen, Denmark., Cáliz J; Ecology of the Global Microbiome-Department of Ecology and Complexity, Centre of Advanced Studies of Blanes (CEAB), Spanish Research Council (CSIC), Blanes, Catalonia, Spain., Triadó-Margarit X; Ecology of the Global Microbiome-Department of Ecology and Complexity, Centre of Advanced Studies of Blanes (CEAB), Spanish Research Council (CSIC), Blanes, Catalonia, Spain., Alonso D; Theoretical and Computational Ecology Group-Department of Ecology and Complexity, Centre of Advanced Studies of Blanes (CEAB), Spanish Research Council (CSIC), Blanes, Catalonia, Spain., Casamayor EO; Ecology of the Global Microbiome-Department of Ecology and Complexity, Centre of Advanced Studies of Blanes (CEAB), Spanish Research Council (CSIC), Blanes, Catalonia, Spain.
Jazyk: angličtina
Zdroj: Environmental microbiology [Environ Microbiol] 2024 Dec; Vol. 26 (12), pp. e70019.
DOI: 10.1111/1462-2920.70019
Abstrakt: Selection and dispersal are the primary processes influencing community assembly at both global and regional scales. Although the effectiveness of dispersal is often examined within the same biome, microscopic organisms demonstrate the capability to colonise and thrive across different biomes. In this study, we evaluated the relationship between (i) aquatic, (ii) sedimentary and (iii) aerial microbial communities, and how local selective pressures influence the potential impact of inter-biome dispersal, focusing on the salinity gradient stress over time in ephemeral saline lakes. Our taxonomic ordination analyses revealed that the three communities were distinctly segregated yet interconnected by shared populations. Organisms prevalent across the three biomes exhibited cosmopolitan behaviour based on global databases, indicating an inherent ability to cross biome boundaries. Cosmopolitan groups dominated the planktonic community at lower salinities but gradually diminished as salinity increased, resulting in communities dominated by aquatic specialists with more restricted environmental distributions. The aerial community was primarily composed of generalists, although airborne halophiles were also identified, suggesting long-range dispersal as a source of colonisers in isolated extremophile environments. Our findings contribute to a better understanding of the dynamic interplay between dispersal and selective pressures on community assembly across biomes, highlighting the significance of aerial microbiota in remote colonisation.
(© 2024 The Author(s). Environmental Microbiology published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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