Abstract
In this study we conducted field investigations to examine the effects of native Cuscuta australis on three exotic invasive plants (i.e. Ipomoea cairica, Mikania micrantha, and Wedelia trilobata) and on the invaded native communities. The results showed that C. australis produced high infection rates on the exotic invasive hosts but low ones on the native species. Furthermore, the results showed that C. australis exhibited vigorous growth and high reproduction when it grew on M. micrantha and W. trilobata, indicating that these exotic invasive plants are more rewarding hosts than are native plants for C. australis. C. australis infection was positively related to the growth traits (e.g. biomass, cover, and total leaf area) and nutrient contents (e.g. N, P, and K) of the exotic invasive plants. The infections of C. australis significantly decreased the growth and nutrient contents of exotic invasive hosts, and the host–parasite interactions benefited the native species with increased species richness and biodiversity, facilitating the recovery of invaded native communities. This study provides a model for a native agent to both resist exotic invasive plants and benefit other native species. Furthermore, it indicates that certain native agents in invaded regions can be an effective and environmentally benign alternative to traditional biological control.
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Acknowledgments
The authors appreciate Dr. Shu-Min Zhang for her help on experiment design, Dr. Wen-Bo Liao for his support for specimen identification, Drs. Qi-Jie Zan and Ai-Ping Wu for their assistance during field investigation, Drs. Hong Liu, Daniel Simberloff, Laura Meyerson, Ragan M. Callaway and Peter Hyde for their valuable and constructive suggestions on improving this manuscript. This study was supported by the Grant for Oversea Distinguished Scholars of the Chinese Academy of Sciences (58246G1215) and China Post-doctoral Foundation (20090450329).
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Yu, H., Liu, J., He, WM. et al. Cuscuta australis restrains three exotic invasive plants and benefits native species. Biol Invasions 13, 747–756 (2011). https://doi.org/10.1007/s10530-010-9865-x
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DOI: https://doi.org/10.1007/s10530-010-9865-x