Unfair! Invasive Plants Succeed By Inhibiting The Competition

Allelochemicals, released from the roots, leaves, and/or other parts of a plant, can negatively impact neighboring species. The “novel weapons hypothesis” suggests that allelochemicals from invasive plants may have a negative effect on native plants because they have not yet been able to evolve tolerance or resistance to the chemicals . The effects of allelochemicals can be direct or indirect. For example, germination and/or growth may be directly affected. Indirect effects can also occur when allelochemicals modify interactions in the soil, including mycorrhizal associations. (Click on title for full story.)