Abstract
Although parasites are known to have various effects on their hosts, we know little about their role in the assembly of diversifying host populations. Using an experimental bacterium (Pseudomonas fluorescens SBW25)-bacteriophage (ϕ2) system, we show that earlier parasite arrival significantly reduced the repeatability of host diversification. Earlier parasite arrival amplified the priority effects associated with the stochastic emergence of novel SBW25 phenotypes, translating into greater historical contingency in SBW25 diversification. Our results highlight the important role of parasite-host interactions in driving host adaptive radiation.
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Acknowledgements
We thank Meng-Hsiu Tsai for assistance to the experiments and Michael Cortez, Emile Gluck-Thaler, Yi-Qi Hao, Martin Turcotte, Caroline Turner, Na Wei, and two anonymous reviewers for comments that improved the manuscript. This study is funded by a British Ecological Society Research Grant (LRB17/1023) and US NSF (DEB-1342754, DEB-1856318, and CBET-1833988).
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Tan, J., Yang, X., He, Q. et al. Earlier parasite arrival reduces the repeatability of host adaptive radiation. ISME J 14, 2358–2360 (2020). https://doi.org/10.1038/s41396-020-0681-8
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DOI: https://doi.org/10.1038/s41396-020-0681-8
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