To list or not to list: using time since invasion to refine impact assessment for an exotic plant proposed as noxious

Ortega, Yvette K.; Valliant, Morgan T.; Pearson, Dean E.

doi:10.1002/ecs2.2961

Cited by 3 publications

(3 citation statements)

References 50 publications

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“…66% to 54% at 11-to 48-year-old populations, respectively. Others have found either no difference in the density of invasive herbs (Hazelton et al 2015) or a slow gradual increase with time since invasion (Mitchell et al 2011;Ortega et al 2019). Thus, we do not see support for boom-bust dynamics in invasive herbs, although most data records, like ours, cover relatively short time spans.…”

Section: Discussioncontrasting

confidence: 92%

“…Time since invasion is rarely considered when investigating the impacts of invasive non-native species, although boom-bust dynamics is an established concept (e.g., Strayer et al 2017) and impacts of invasive non-native species can accumulate or change with time since local invasion (e.g., Gaertner et al 2009;Strayer 2012;Ortega et al 2019). Yet, in contrast to our expectations, lupine invasions revealed neither boom-bust dynamics of Lupinus polyphyllus, nor a change in its impacts.…”

Section: Discussionmentioning

confidence: 99%

“…Understanding the dynamics of an invasive non-native species is important in invasion biology and for developing best management practices. Whilst it is acknowledged that the ecological impacts and abundance of non-native species are not stagnant but may vary with time since invasion (Simberloff and Gibbons 2004;Strayer 2012;Flory and Clay 2013;Ortega et al 2019), empirical data are scant on how the abundance and ecological impacts of non-native species change with time (Strayer et al 2017;Ortega et al 2019;Crystal-Ornelas and Lockwood 2020). Previous studies have shown that invasive non-native species can progress from a 'harmful' and abundant phase to a 'harmless' phase with a lower population size (i.e., boom-bust dynamics) (Elton 1958;Williamson 1996) and, occasionally, populations of invasive non-native species may even collapse spontaneously (e.g., reviewed by Simberloff and Gibbons 2004).…”

Section: Introductionmentioning

confidence: 99%

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The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age

et al. 2021

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The ecological impacts of invasive species may change or accumulate with time since local invasion, potentially inducing further changes in communities and the abiotic environment. Yet, time since invasion is rarely considered when investigating the ecological impacts of invasive non-native species. To examine the effect of time since invasion on the ecological impacts of Lupinus polyphyllus, a perennial nitrogen-fixing herb, we surveyed vascular plant communities in the presence and absence of L. polyphyllus in young, intermediate, and old semi-natural grassland sites (ca. 5, 10, 15 years representing both time since lupine invasion and plant community age). We analyzed vascular plant community composition, vascular plant species richness, and the cover of various ecological plant groups and L. polyphyllus. In contrast to our hypotheses, we found no change in the mean cover of L. polyphyllus (about 35%) with time since local invasion, and an ordination did not suggest marked changes in plant community composition. L. polyphyllus was associated with lower species richness in invaded plant communities but this effect did not change with time since invasion. Invaded plant communities were also associated with lower occurrence of generalist, oligotrophic (low-nutrient-adapted) and copiotrophic (nutrient-demanding) species but no temporal dynamics were detected. We conclude that even the intermediate cover of L. polyphyllus can reduce plant species richness, but the ecological impact caused by this invader might not dramatically change or accumulate with time since invasion.

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Section: Discussioncontrasting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age

et al. 2021

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The invasive tree, Ailanthus altissima, impacts understory nativity, not seedbank nativity

Brooks

Barney

Salom

2021

Forest Ecology and Management

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Temporal development in the impacts of plant invasions: search for the underlying mechanisms

Dostál

2024

Journal of Evolutionary Biology

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Many invasive plants have negative impacts on native populations and communities, but there remains much uncertainty about how these impacts develop over time. In this review, I describe the mechanisms that promote the initial dominance of invaders, the characteristic associated with large negative impacts, and present the processes that contribute to changes in invader abundance and impacts over time. Together with ecological processes such as ecosystem engineering or enemy accumulation, I show that temporal variation in impacts can be linked to evolution in both native and invasive species. I also show that multiple processes operating in the same invasion system can jointly shape long-term impacts. Finally, I present the framework of modern of coexistence theory as a tool for predicting the effects of invaders on native populations, and how these effects change with processes ongoing within invaded communities.

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To list or not to list: using time since invasion to refine impact assessment for an exotic plant proposed as noxious

Abstract: Methods that allow rapid and robust evaluation of plant invader impacts are needed to identify

Cited by 3 publications

References 50 publications

The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age

The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age

The invasive tree, Ailanthus altissima, impacts understory nativity, not seedbank nativity

Temporal development in the impacts of plant invasions: search for the underlying mechanisms

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