Native plants fare better against an introduced competitor with native microbes and lower nitrogen availability

W. G. Shivega,Laura Aldrich‐Wolfe

Published 2017 in AoB Plants

ABSTRACT

Success of plant invasions may depend on soil resources. In the greenhouse, two native tallgrass prairie species and an exotic invasive exhibited strong differences in performance between soils with and without native microbes and with differing nitrogen availability. Increased nitrogen availability only benefitted the exotic, while native microbes only benefitted the natives. The microbial benefit to native plant growth disappeared under high soil nitrogen, while the negative effect of elevated nitrogen on survival of one of the natives was ameliorated by the presence of the exotic. Nitrogen and soil microbes interact to affect the strength of competition in plant invasions.

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