What we don’t seed: the role of long-lived seed banks as hidden legacies of invasive plants

Passos, Isabel; Marchante, Hélia; Pinho, Rosa; Marchante, Elizabete

doi:10.1007/s11258-017-0770-6

Cited by 35 publications

(23 citation statements)

References 34 publications

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“…As expected from such reduced rhizobium density, we found a decrease in the biomass of G. monspessulana seedlings grown in soil collected from areas where G. monspessulana had been removed by hand‐pulling. For a species that generates a large seedbank in areas where it has successfully invaded, which is the case for many legume species (Bossard et al ; Passos et al ), reinvasion from the seedbank is a serious concern. Seedlings could still germinate and initiate a new positive feedback loop, but our results suggest that low initial rhizobium density would likely hamper seedling growth and slow reinvasion.…”

Section: Discussionmentioning

confidence: 99%

Invasive legume management strategies differentially impact mutualist abundance and benefit to native and invasive hosts

Komatsu

Simms

2019

Restoration Ecology

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Determining the best management practices for plant invasions is a critical, but often elusive goal. Invasive removals frequently involve complex and poorly understood biotic interactions. For example, invasive species can leave potent legacies that influence the success of native species restoration efforts, and positive plant‐microbial feedbacks may promote continued reinvasion by an exotic species following restoration. Removal methods can vary in their effects on plant–soil feedbacks, with consequences for restoration of native species. We determined the effects of invasion by a leguminous shrub (French broom; Genista monspessulana) on the density and community composition of, and benefit conferred by, its microbial mutualists in its invading range. Densities of soil‐dwelling rhizobia were much higher in areas invaded by G. monspessulana relative to uninvaded areas, and this increased density of rhizobia fed back to increase seedling growth of both the invader and native legumes. We further compared how three techniques for removing G. monspessulana affected the densities of rhizobia relative to areas where G. monspessulana was still present. Removal by hand‐pulling reduced soil rhizobial densities, and reduced growth of one native legume, while having no effect on the growth of the invader. Overall, our results show that the consequences of restoration techniques, both above‐ and belowground, could be critical for the successful removal of an invasive legume and restoration of native species.

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Section: Discussionmentioning

confidence: 99%

Invasive legume management strategies differentially impact mutualist abundance and benefit to native and invasive hosts

Komatsu

Simms

2019

Restoration Ecology

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“…For example, the high dispersal rate and persistent seed bank of Acacia dealbata may contribute to its invasiveness and 264 expanding spatial distribution (Gibson et al 2011). In a recent study, the seed bank density of A. dealbata reached more than 60,000 seeds m -2 in invaded plots compared to only 9 seeds m -2 in 266 uninvaded plots (Passos et al 2017). Invasion by Acacia has also been shown to reduce the density of native seeds in the seed bank, which further reinforces aboveground losses in species 268 diversity (Gioria et al 2014;Gioria and Pyšek 2016).…”

Section: Species Distributionsmentioning

confidence: 96%

Dormancy in metacommunities

Wisnoski¹,

Leibold²,

Lennon³

2018

Preprint

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Although metacommunity ecology has improved our understanding of how dispersal 16 affects community structure and dynamics across spatial scales, it has yet to adequately account for dormancy. Dormancy is a reversible state of reduced metabolic activity that enables temporal 18 dispersal within the metacommunity. Dormancy is also a metacommunity-level process because it can covary with spatial dispersal and affect diversity across spatial scales. We develop a 20 framework to integrate dispersal and dormancy, focusing on the covariation they exhibit, to predict how dormancy modifies the importance of species interactions, dispersal, and historical 22 contingencies in metacommunities. We examine case studies of microcrustaceans in ephemeral ponds, where dormancy is integral to metacommunity dynamics. We analyze traits of bromeliad-24 dwelling invertebrates and identify constraints on dispersal and dormancy strategies. Using simulations, we demonstrate that dormancy can alter classic metacommunity patterns of diversity 26 in ways that depend on dispersal-dormancy covariation and spatiotemporal environmental variability. We propose that dormancy may also facilitate evolution-mediated priority effects if 28 locally adapted seed banks prevent colonization by more dispersal-limited species. We present theoretically and empirically testable predictions for other possible ecological and evolutionary 30 implications of dormancy in metacommunities, some of which may fundamentally alter our understanding of metacommunity ecology.

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“…Although by no means comprehensive, our simulations illustrate three important features of biodiversity in metacommunities: (1) dormancy alters the distribution of diversity across spatial scales, (2) these effects can depend strongly on the nature of spatiotemporal environmental variation, and (3) these effects interact with dispersal in ways that depend on the nature of dispersal-dormancy covariation. than 60,000 seeds m 22 in invaded plots, compared with only 9 seeds m 22 in uninvaded plots (Passos et al 2017). Invasion by Acacia has also been shown to reduce the density of native seeds in the seed bank, which further reinforces aboveground losses in species diversity (Gioria et al 2014;Gioria and Pyšek 2016).…”

Section: Box 3: Modeling Dormancy In Metacommunitiesmentioning

confidence: 99%

Dormancy in Metacommunities

Wisnoski

Leibold

Lennon

2019

The American Naturalist

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Although metacommunity ecology has improved our understanding of how dispersal affects community structure and dynamics across spatial scales, it has yet to adequately account for dormancy. Dormancy is a reversible state of reduced metabolic activity that enables temporal dispersal within the metacommunity. Dormancy is also a metacommunity-level process because it can covary with spatial dispersal and affect diversity across spatial scales. We develop a framework to integrate dispersal and dormancy, focusing on the covariation they exhibit, to predict how dormancy modifies the importance of species interactions, dispersal, and historical contingencies in metacommunities. We used empirical and modeling approaches to demonstrate the utility of this framework. We examined case studies of microcrustaceans in ephemeral ponds, where dormancy underlies metacommunity dynamics, and identified constraints on the dispersal and dormancy strategies of bromeliad-dwelling invertebrates. Using simulations, we showed that dormancy can alter classic metacommunity patterns of diversity in ways that depend on dispersal-dormancy covariation and spatiotemporal environmental variability. We propose that dormancy may also facilitate evolution-mediated priority effects if locally adapted seed banks prevent colonization by more dispersal-limited species. Last, we present testable predictions for the implications of dormancy in metacommunities, some of which may fundamentally alter our understanding of metacommunity ecology.

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What we don’t seed: the role of long-lived seed banks as hidden legacies of invasive plants

Cited by 35 publications

References 34 publications

Invasive legume management strategies differentially impact mutualist abundance and benefit to native and invasive hosts

Invasive legume management strategies differentially impact mutualist abundance and benefit to native and invasive hosts

Dormancy in metacommunities

Dormancy in Metacommunities

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