Not novel, just better: competition between native and non-native plants in California grasslands that share species traits

Corbin, Jeffrey D.; D’Antonio, Carla M.

doi:10.1007/s11258-010-9722-0

Cited by 49 publications

(30 citation statements)

References 34 publications

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“…While at EU sites C. stoebe biomass increased by 107%, on average, when competitors were removed, mean increase in biomass was only 18% at NA sites. Similarly to our results, Corbin and d'Antonio (2010) found that the productivity of exotic perennial grasses was not affected by the presence of native NA perennial grasses. In contrast, NA perennial grass productivity was significantly lower in plots with exotic perennial grasses, compared to plots without exotic grasses.…”

Section: R Eportssupporting

confidence: 91%

Dissecting impact of plant invaders: Do invaders behave differently in the new range?

Sun

Collins

Schaffner

et al. 2013

Ecology

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Abstract. Knowledge from basic plant ecology suggests that impact of one plant species on another is driven by either competition for the same limiting resources, or by unique plant traits. These processes might be context specific, explaining a differential impact of exotic plant invaders in the native vs. introduced range. With the help of a conceptual framework, we aimed at identifying the relationship between invader biomass and impact in the invasive Centaurea stoebe by conducting pairwise competition experiments with 15 European (old) and 15 North American (new) neighboring species. Old neighbors grew larger and could use available soil moisture more efficiently for growth than new neighbors. Interestingly, biomass of C. stoebe explained a substantial amount of the variation in biomass of the coevolved neighbors, but not of the new ''naı¨ve'' neighbors. Thus, impact in the home range appears to be driven by competition for the same limiting resources, but by other factors in the introduced range, possibly by exploitation of resources that are not used by the new neighbors or by interference competition. This distinction has important consequences for the management of invasive species, as in our study ecosystem recovery is less likely after simple biomass reduction.

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Section: R Eportssupporting

confidence: 91%

Dissecting impact of plant invaders: Do invaders behave differently in the new range?

Sun

Collins

Schaffner

et al. 2013

Ecology

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“…In these settings, the length of the summer drought is shorter or is tempered by summer fog, so adult survival of bunchgrasses is likely greater, consistent with the conditions needed for coexistence that we identify here. Indeed, in these sites exotic perennial grasses are presenting a challenge to native perennial species (Corbin and D'Antonio 2010). Although the model does not explicitly address local environmental variation, it does implicitly incorporate environmental variation by combining data from a range of species and geography to estimate parameters.…”

Section: Discussionmentioning

confidence: 99%

Controls over native perennial grass exclusion and persistence in California grasslands invaded by annuals

Mordecai

Molinari

Stahlheber

et al. 2015

Ecology

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Despite obvious impacts of nonnative species in many ecosystems, the long-term outcome of competition between native and exotic species often remains unclear. Demographic models can resolve the outcome of competition between native and exotic species and provide insight into conditions favoring exclusion vs. coexistence. California grasslands are one of the most heavily invaded ecosystems in North America. Although California native perennial bunchgrasses are thought to be restricted to a fraction of their original abundance, the eventual outcome of competition with invasive European annual grasses at a local scale (competitive exclusion, stable persistence, or priority effects) remains unresolved. Here, we used a two-species discrete time population growth model to predict the outcome of competition between exotic annual and native perennial grasses in California, and to determine the demographic traits responsible for the outcome. The model is parameterized with empirical data from several field experiments. We found that, once introduced, annual grasses persist stably with little uncertainty. Although perennial grasses are competitively excluded on average, the most likely range of model predictions also includes stable coexistence with annual grasses. As for many other perennial plants, native bunchgrass population growth is highly sensitive to the survival of adults. Management interventions that improve perennial adult survival are likely to be more effective than those that reduce exotic annual seed production or establishment, reduce competition, or increase perennial seedling establishment. Further empirical data on summer survival of bunchgrass adults and competitive effects of annuals on perennials would most improve model predictions because they contribute most to the uncertainty in the predicted outcome for the perennial grass. This work demonstrates how demographic approaches can clarify the outcome of competition between native and exotic species, identify key targets for future empirical work, and predict the effectiveness of management interventions. Such studies are critical both for understanding the impacts of invasion and for targeting management responses that maximize the benefit to native species.

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“…Species’ functional traits are a critical missing piece of our understanding of the scale‐dependent effects of invasion on community diversity. Invasive species have often been shown to compete most strongly with functionally similar and closely related species (Fargione, Brown & Tilman ; Strauss, Webb & Salamin ; Corbin & D'Antonio ; Brewer & Bailey ). If such limiting‐similarity competition is indeed operating, and if the species most similar to the invader are indeed the most common species in an invaded region, then a trait‐based explanation for scale‐dependent loss of diversity is supported.…”

Section: Introductionmentioning

confidence: 99%

Do high‐impact invaders have the strongest negative effects on abundant and functionally similar resident species?

Case¹,

Harrison²,

Cornell³

2016

Functional Ecology

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1. Although invasive plants may out-compete and cause local-scale extirpations of resident species, it is widely observed that they cause few extinctions at larger spatial scales. 2. One possible explanation is that highly successful invaders tend to be functionally similar to, and therefore compete most strongly with, resident species that are also relatively successful and widespread. High abundance may then protect these functionally similar residents from complete extinction over large areas despite their stronger competition with the invader. 3. We tested this idea in a native-rich grassland where a novel invader, Aegilops triuncialis (barb goatgrass), strongly affects community diversity at the local scale. We compared resident species abundances in paired invaded and uninvaded plots with similar soil and community characteristics and invasibility as assayed by experimentally planted Aegilops. 4. We found that the negative effects of the invader on abundance were strongest on resident species belonging to the same functional group as the invader (annual grasses). Within grasses, multivariate functional similarity to the invader also predicted decline in abundance under invasion. 5. However, we did not find the predicted general relationship between abundance, functional similarity to the invader, and tendency to decline under invasion. 6. Additional factors, such as spatial heterogeneity in the invaded community, must contribute to the relative scarcity of large-scale extinctions under invasion.

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Not novel, just better: competition between native and non-native plants in California grasslands that share species traits

Cited by 49 publications

References 34 publications

Dissecting impact of plant invaders: Do invaders behave differently in the new range?

Dissecting impact of plant invaders: Do invaders behave differently in the new range?

Controls over native perennial grass exclusion and persistence in California grasslands invaded by annuals

Do high‐impact invaders have the strongest negative effects on abundant and functionally similar resident species?

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