Abstract
Mountain pine beetle (MPB) has recently expanded its host range to the novel jack pine forests in Alberta. Invasion success of MPB may depend on the outcome of interactions between its symbiotic fungus Grosmannia clavigera and Ophiostoma ips, a fungal associate of a potential competitor Ips pini. However, how the quality of jack pine phloem could influence interactions between the fungi is unknown. We investigated whether introduced concentrations of host nitrogen and monoterpenes affect the growth of and interaction between the fungi. Nitrogen concentrations did not affect the growth rate of either fungus. In the absence of monoterpenes, the presence of O. ips promoted G. clavigera growth. Monoterpenes either promoted or inhibited the growth of both fungi, and altered the outcome of species interactions from facilitation to no-effect. Overall, these results suggest that jack pine phloem quality and the presence of a niche-sharing fungus could influence MPB development.
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Acknowledgments
We thank Tod Ramsfield at Northern Forestry Centre for providing the fungal culture and endless support. We would like to also thank Guncha Ishangulyyeva, Altaf Hussain, and everyone else in Erbilgin’s lab for providing laboratory and field assistance.
Funding
This work was supported by funding provided by Canada Foundation of Innovation and NSERC–Discovery Award to Nadir Erbilgin.
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Wang, F., Cale, J.A. & Erbilgin, N. Induced Defenses of a Novel Host Tree Affect the Growth and Interactions of Bark Beetle-Vectored Fungi. Microb Ecol 80, 181–190 (2020). https://doi.org/10.1007/s00248-020-01490-0
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DOI: https://doi.org/10.1007/s00248-020-01490-0