Dynamics of an experimental microbial invasion

Proceedings of the National Academy of Sciences of the United States of America
Francisco AcostaK David Hambright

Abstract

The ecological dynamics underlying species invasions have been a major focus of research in macroorganisms for the last five decades. However, we still know little about the processes behind invasion by unicellular organisms. To expand our knowledge of microbial invasions, we studied the roles of propagule pressure, nutrient supply, and biotic resistance in the invasion success of a freshwater invasive alga, Prymnesium parvum, using microcosms containing natural freshwater microbial assemblages. Microcosms were subjected to a factorial design with two levels of nutrient-induced diversity and three levels of propagule pressure, and incubated for 7 d, during which P. parvum densities and microbial community composition were tracked. Successful invasion occurred in microcosms receiving high propagule pressure whereas nutrients or community diversity played no role in invasion success. Invaded communities experienced distinctive changes in composition compared with communities where the invasion was unsuccessful. Successfully invaded microbial communities had an increased abundance of fungi and ciliates, and decreased abundances of diatoms and cercozoans. Many of these changes mirrored the microbial community changes detected durin...Continue Reading

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Citations

May 4, 2016·The ISME Journal·Marta KinnunenBarth F Smets
Jul 28, 2019·Nature Reviews. Microbiology·Madhav P ThakurStefan Geisen
Jul 31, 2019·Nature Ecology & Evolution·Jean C C VilaJames Rosindell
Jan 23, 2021·PLoS Computational Biology·Helen M KurkjianBabak Momeni
Feb 16, 2021·Frontiers in Microbiology·Emina MulaosmanovicBeatrix W Alsanius
Nov 19, 2020·Applied Microbiology and Biotechnology·Nuria Fernandez-GonzalezM Carballa
Dec 28, 2018·Trends in Biotechnology·Laura M KaminskyTerrence H Bell
May 23, 2021·FEMS Microbiology Ecology·Erik S WrightKalin H Vetsigian
Oct 26, 2021·Molecular Systems Biology·Susan HromadaOphelia S Venturelli
Nov 9, 2021·PLoS Computational Biology·Pablo Lechón-AlonsoSamraat Pawar

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