Predicting future invaders and future invasions

Fournier, Alice; Penone, Caterina; Pennino, María Grazia; Courchamp, Franck

doi:10.1073/pnas.1803456116

Cited by 115 publications

(103 citation statements)

References 65 publications

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“…What makes some species successful invaders while others fail is a pivotal question that is attracting major research effort (e.g. Fournier, Penone, Pennino, & Courchamp, ). Despite major advances, much uncertainty remains, largely due to the high level of context dependency of invasions (i.e.…”

Section: Paths Forwardmentioning

confidence: 99%

Using stable isotope analysis to answer fundamental questions in invasion ecology: Progress and prospects

et al. 2019

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1. What makes some species successful invaders while others fail, and why some invaders have major impacts in invaded ecosystems are pivotal questions that are attracting major research effort. The increasing availability of high resolution, georeferenced stable isotope landscapes ('isoscapes'), coupled with the commercialization of stable isotope-enriched tracer molecules and the development of new analytical approaches, is facilitating novel applications of stable isotope techniques in ecology.We can now address ecological questions that were previously intractable.2. We review and discuss how stable isotope analysis (SIA) can complement fundamental research themes in the study of biological invasions, especially in answering questions relating to the physiological and ecological mechanisms underlying invasion processes and invader impacts.3. SIA was first used for simply describing the diet of invaders but, more recently, SIA-informed metrics of population and community trophic structure have been advanced. These approaches now permit the comparison of diets across space and time and provide quantitative tools to compare food webs across different stages of invasion.4. SIA has also been pivotal in quantifying competition for resources between native and non-native species (e.g. competition for food, water, or nutrient use). Specific questions related to modes of dispersal (e.g. origin and distance/direction travelled) and mechanisms of establishment can also be addressed using SIA in diverse taxa.5. An overarching goal is to highlight examples of recent studies that have used SIA in key areas of invasion ecology and use these to synthesize testable predictions where SIA could be applied to future studies. We conclude by highlighting several paths forward and describing how unresolved challenges in quantifying the rates, impacts, and mechanisms underlying invasions could potentially benefit from the use of SIA. | 197Methods in Ecology and Evoluঞon MCCUE Et al.

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Section: Paths Forwardmentioning

confidence: 99%

Using stable isotope analysis to answer fundamental questions in invasion ecology: Progress and prospects

et al. 2019

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“…Numerous studies have failed to find traits of species, spanning diverse taxonomic and trophic groups, that reliably predict invader ecological impact (Hayes and Barry 2008; but see Valdovinos et al 2018, Fournier et al 2019 for recent studies on specific taxa). While some have found traits that predict invasiveness (Hui et al 2016), there is no correlation between invasiveness (i.e.…”

Section: Background and Development Of Invasive Species Ecological Immentioning

confidence: 99%

On the RIP: using Relative Impact Potential to assess the ecological impacts of invasive alien species

Dickey¹,

Cuthbert²,

South³

et al. 2020

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Invasive alien species continue to arrive in new locations with no abatement in rate, and thus greater predictive powers surrounding their ecological impacts are required. In particular, we need improved means of quantifying the ecological impacts of new invasive species under different contexts. Here, we develop a suite of metrics based upon the novel Relative Impact Potential (RIP) metric, combining the functional response (consumer per capita effect), with proxies for the numerical response (consumer population response), providing quantification of invasive species ecological impact. These metrics are comparative in relation to the eco-evolutionary baseline of trophically analogous natives, as well as other invasive species and across multiple populations. Crucially, the metrics also reveal how impacts of invasive species change under abiotic and biotic contexts. While studies focused solely on functional responses have been successful in predictive invasion ecology, RIP retains these advantages while adding vital other predictive elements, principally consumer abundance. RIP can also be combined with propagule pressure to quantify overall invasion risk. By highlighting functional response and numerical response proxies, we outline a user-friendly method for assessing the impacts of invaders of all trophic levels and taxonomic groups. We apply the metric to impact assessment in the face of climate change by taking account of both changing predator consumption rates and prey reproduction rates. We proceed to outline the application of RIP to assess biotic resistance against incoming invasive species, the effect of evolution on invasive species impacts, application to interspecific competition, changing spatio-temporal patterns of invasion, and how RIP can inform biological control. We propose that RIP provides scientists and practitioners with a user-friendly, customisable and, crucially, powerful technique to inform invasive species policy and management.

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“…Furthermore, many of these impacts are expected to increase in the future with climate change [9,10]. Given their negative impacts on economies and environments, considerable and high-profile focus has been placed on quantifying such impacts [2,9,11,12], predicting future invaders through development of trait-based frameworks [13][14][15][16], preventing establishment and subsequent impacts through policy and regulatory actions [17][18][19], and developing effective management to contain or reverse negative impacts in recipient communities [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Competitive Interactions of Flowering Rush (Butomus umbellatus L.) Cytotypes in Submersed and Emergent Experimental Aquatic Plant Communities

Harms

2020

Diversity

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The ability to invade communities in a variety of habitats (e.g., along a depth gradient) may facilitate establishment and spread of invasive plants, but how multiple lineages of a species perform under varying conditions is understudied. A series of greenhouse common garden experiments were conducted in which six diploid and four triploid populations of the aquatic invasive plant Butomus umbellatus L. (Butomaceae) were grown in submersed or emergent conditions, in monoculture or in a multispecies community, to compare establishment and productivity of cytotypes under competition. Diploid biomass overall was 12 times higher than triploids in the submersed experiment and three times higher in the emergent experiment. Diploid shoot:root ratio was double that of triploid plants in submersed conditions overall, and double in emergent conditions in monoculture. Relative interaction intensities (RII) indicated that triploid plants were sixteen times more negatively impacted by competition under submersed conditions but diploid plants were twice as impacted under emergent conditions. Recipient communities were similarly negatively impacted by B. umbellatus cytotypes. This study supports the idea that diploid and triploid B. umbellatus plants are equally capable of invading emergent communities, but that diploid plants may be better adapted for invading in submersed habitats. However, consistently lower shoot:root ratios in both monoculture and in communities suggests that triploid plants may be better-adapted competitors in the long term due to increased resource allocation to roots. This represents the first examination into the role of cytotype and habitat on competitive interactions of B. umbellatus.

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Predicting future invaders and future invasions

Cited by 115 publications

References 65 publications

Using stable isotope analysis to answer fundamental questions in invasion ecology: Progress and prospects

Using stable isotope analysis to answer fundamental questions in invasion ecology: Progress and prospects

On the RIP: using Relative Impact Potential to assess the ecological impacts of invasive alien species

Competitive Interactions of Flowering Rush (Butomus umbellatus L.) Cytotypes in Submersed and Emergent Experimental Aquatic Plant Communities

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