Reference:
Nemec, K.T., Allen, C.R., Helzer, C.J., & Wedin,D.A. (2013). Influence of richness and seeding density on invasion resistance in experimental tallgrass prairie restoration. Ecological Restoration, 31(2), 168-185. Summary: Researchers set out to better understand the role richness plays in reducing invasive species success in medium-sized plots. Results indicate that richness is more important at regulating invasive species colonization than density. Research Goals:
Richness was found to be more important than density of reducing the success of invasive species. This could be due to increases in richness allowing for more niches to be filled in the plots effectively reducing the availability of nutrients and space for invasive species to consume. This can help restoration planners by emphasizing the need to fill all available niches to reduce the chance of invasive colonization. Moreover, richness should be seen through different types of plants not just multiple species of a single type (ie: multiple species of grass). Questions:
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Reference:
Mahoney, S., Mike, J.B., Parker, J.M., Lassiter, L.S., & Whitham, T.G. (2019). Selection for genetics-based architecture traits in a anative cottonwood negatively affects invasive tamarisk in a restoration field trial. Restoration Ecology, 27(1), 15-22. Summary: Researchers hypothesized that there would be a relationship between mean average maximum temperature transfer distance and cottonwood growth and that cottonwood growth would impact tamarisk invasion success. Findings indicate that their hypothesis was accurate and that the mean average maximum temperature transfer distance of stock cottonwoods plays an important role in cottonwood architecture which can help restoration strategies counteract tamarisk growth. Research Goals:
Researchers set out to better understand the relationships between cottonwood size and architecture and tamarisk growth. Cottonwoods from cooler areas tended to grow better than those from warmer areas. This has implications for climate change that may result in cottonwood trees that are unable to grow to the needed dimensions in order to counteract tamarisk invasion. Questions:
Reference:
Hess, M.C.M., Mesleard, F., & Buisson, E. (2019). Priority effect: Emerging principles for invasive plant species management. Ecological Engineering, 127, 48-57. Summary: Researchers set out to better understand the dynamics of invasive species priority effects and how those effects could be decreased. Results indicate while there are some known aids for native species recolonization, there is a lot that is still unknown and efforts must be made to better understand these complex relationships between species and environment. Research Goals:
Priority effects are how one species changes the ecosystem for other species or itself. These effects can be beneficial such as native species providing nutrients for the next stage of succession or they can be harmful such as invasive species shading out native species growth. It is not enough to just remove invasive species. However, removal is needed and must be coupled with revegation and may also require alteration of soils to promote native growth. Questions:
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