Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 550163
Title Competition and predation as possible causes of bacterial rarity
Author(s) Kurm, Viola; Putten, Wim H. van der; Weidner, Simone; Geisen, Stefan; Snoek, Basten L.; Bakx, Tanja; Gera Hol, Wilhelmina H.
Source Environmental Microbiology 21 (2019)4. - ISSN 1462-2912 - p. 1356 - 1368.
DOI https://doi.org/10.1111/1462-2920.14569
Department(s) Biointeractions and Plant Health
PE&RC
Laboratory of Nematology
Groep Koornneef
Publication type Refereed Article in a scientific journal
Publication year 2019
Abstract

We assembled communities of bacteria and exposed them to different nutrient concentrations with or without predation by protists. Taxa that were rare in the field were less abundant at low nutrient concentrations than common taxa, independent of predation. However, some taxa that were rare in the field became highly abundant in the assembled communities, especially under ample nutrient availability. This high abundance points at a possible competitive advantage of some rare bacterial taxa under nutrient-rich conditions. In contrast, the abundance of most rare bacterial taxa decreased at low resource availability. Since low resource availability will be the prevailing situation in most soils, our data suggests that under those conditions poor competitiveness for limiting resources may contribute to bacterial rarity. Interestingly, taxa that were rare in the field and most successful under predator-free conditions in the lab also tended to be more reduced by predation than common taxa. This suggests that predation contributes to rarity of bacterial taxa in the field. We further discuss whether there may be a trade-off between competitiveness and predation resistance. The substantial variability among taxa in their responses to competition and predation suggests that other factors, for example abiotic conditions and dispersal ability, also influence the local abundance of soil bacteria.

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