Demographic mechanisms underlying invasive spread: Comparison of two invasive plants and their native ecological analogs (original) (raw)

Abstract

Background/Question/Methods Knowledge of a species' range limit is important when triaging for non-native invasive species management. With invasive species, we often have limited data at the early stages of invasion as species are not at equilibrium. These species may be beyond eradication or control by the time enough demographic data are collected. Inferring population dynamics based on current locations of invasive populations may under- or over-estimate population growth rates and, thus, potential spread. Understanding how environmental variation affects demographic parameters is important in determining species range limits and to providing a mechanistic basis for understanding invasions. Mechanistic models increase our confidence when extrapolating population level patterns to a new set of conditions or novel landscape. We investigated establishment dynamics of two non-native invasive species; the woody Berberis thunbergii and the monocarpic biennial Alliaria petiolata, a...

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