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Productivity and predation are thought to be crucial drivers of bacterial diversity. We tested how the productivity-diversity of a natural bacterial community is modified by the presence of protist predators with different feeding preferences. In the absence of predators, there was a unimodal relationship between bacterial diversity and productivity. We found that three protist species (Bodo, Spumella and Cyclidium) had widely divergent effects on bacterial diversity across the productivity gradient. Bodo and Cyclidium had little effect on the shape of the productivity-diversity gradient, while Spumella flattened the relationship. We explain these results in terms of the feeding preferences of these predators.

Original publication

DOI

10.1098/rsbl.2010.0027

Type

Journal article

Journal

Biol Lett

Publication Date

23/10/2010

Volume

6

Pages

639 - 642

Keywords

Bacteria, Biodiversity, Ecosystem, Eukaryota