Parental Plant Elevation Does Not Affect Nonnative Poa annua's Seed Germination and Propagation Potential

Deschênes, Élise; Caubel, Eloise; Sirois, Luc

doi:10.3375/043.039.0305

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…Numerous studies have documented a variety of plant traits conferring invasive plants an advantage over the invaded native communities. For example, high total and specific leaf area (Allred et al 2010), high germination rates (Deschenes et al 2019), specific mechanism of nitrogen acquisition (Laungani and Knops 2009), and chemical inhibition of native plant photosynthesis (Musil et al 2009) have all, among others, been identified as features of invasive plants contributing to their invasion success. Also, competition for space and resources during recruitment or the production of allelochemicals by invasive plants may prevent native species from growing populations that could resist the invasion (e.g., Edwards et al 2019;Esch et al 2018;Grove et al 2017).…”

Section: Assessing Vulnerability To Invasionmentioning

confidence: 99%

Assessing vulnerability and resistance to plant invasions: a native community perspective

Ibáñez

Lei

Petri

et al. 2021

Invasive plant sci. manag.

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Risk assessments of biological invasions rarely account for native species performance and community features, but this assessment could provide additional insights for management aimed at decreasing vulnerability or increasing resistance of a plant community to invasions. To gather information on the drivers of native plant communities’ vulnerability and resistance to invasion, we conducted a literature search and meta-analysis. From the data collected we compared native and invasive plant performance between sites with high and low levels of invasion. We then investigated under which conditions native performance increased, decreased, or did not change with respect to invasive plants. We analyzed data from 214 publications summing to 506 observations. There were six main drivers of vulnerability to invasion: disturbance, decrease in resources, increase in resources, lack of biotic resistance, lack of natural enemies, and differences in propagule availability between native and invasive species. The two mechanisms of vulnerability to invasion associated with a strong decline in native plant performance were propagule availability and lack of biotic resistance. Native plants marginally benefited from enemy release and from decreases in resources, while invasive plants strongly benefited from both increased resources and lack of enemies. Fluctuation of resources, decreases and increases, were strongly associated with higher invasive performance while native plants varied in their response. These differences were particularly strong in instances of decreasing water or nutrients, and of increasing light and nutrients. We found overall neutral to positive responses of native plant communities to disturbance; but natives were outperformed by invasive species when disturbance was caused by human activities. We identified ecosystem features associated with both vulnerability and resistance to invasion, then used our results to inform management aimed at protecting the native community.

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