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Plant–soil feedback in native vs. invasive populations of a range expanding plant

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Abstract

Background and aims

Although plant–soil feedback has been suggested as a mechanism that drives the success of invasive plants, studies that investigate differences in the intensity of plant–soil feedback among native and invasive populations of the same species are still lacking. However, such knowledge is important because it can provide an understanding of the mechanisms responsible for the spread of a species. Rorippa austriaca is a potentially invasive species - a successful range expander in Europe.

Methods

We compared the plant–soil feedback of R. austriaca in populations from its native and invasive range. We explored both intraspecific feedback as well as feedback on a co-occurring grass species.

Results

Our results revealed a strong negative feedback effect as a consequence of soil conditioning by R. austriaca from the native range. On the contrary, a negative feedback effect was not observed for invasive R. austriaca. Interestingly, R. austriaca from the invasive range had a higher biomass than native R. austriaca.

Conclusion

Our results might be explained by pathogen accumulation and soil modification by native R. austriaca, which had strong intra- and interspecific effects that seemed to be lost in the invasive R. austriaca. The loss of negative intraspecific plant–soil feedback and the increased growth of the invasive population may contribute to its successful range expansion. In spite of its increased growth, the co-occurring grass species is expected to successfully coexist with the invasive R. austriaca.

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Acknowledgments

We are grateful to Bohdana Frantíková for her technical assistance with the experiment. Participants in the POPEKOL seminars, Michael Van Nuland and two anonymous reviewers provided us with many useful comments. The study was supported by the Charles University in Prague, project GA UK No. 400611, and partly by institutional projects RVO 67985939 and MŠMT.

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Correspondence to Tomáš Dostálek.

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Responsible Editor: Juha Mikola.

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Dostálek, T., Münzbergová, Z., Kladivová, A. et al. Plant–soil feedback in native vs. invasive populations of a range expanding plant. Plant Soil 399, 209–220 (2016). https://doi.org/10.1007/s11104-015-2688-x

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  • DOI: https://doi.org/10.1007/s11104-015-2688-x

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