Habitat type and community age as barriers to alien plant invasions in coastal species-habitat networks

Lami, Francesco; Vitti, Stefano; Marini, Lorenzo; Pellegrini, Elisa; Casolo, Valentino; Trotta, Giacomo; Sigura, Maurizia; Boscutti, Francesco

doi:10.1016/j.ecolind.2021.108450

Cited by 9 publications

(7 citation statements)

References 80 publications

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“…Boscutti et al, 2016; Matthews & Spyreas, 2010), but little is known about changes in trajectories along an environmental stress gradient. Abiotic gradients are pivotal in determining community composition, strongly interplaying with biotic factors (Campbell & Keddy, 2022; Lami et al, 2021; Seabloom & van der Valk, 2003). At early stages of plant community succession, propagule availability and environmental conditions limit plant colonization (Lami et al, 2021; Méndez‐Toribio et al, 2020), whereas competition is manly acting in the later stages (Huston & Smith, 1987; Tatsumi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Abiotic gradients are pivotal in determining community composition, strongly interplaying with biotic factors (Campbell & Keddy, 2022; Lami et al, 2021; Seabloom & van der Valk, 2003). At early stages of plant community succession, propagule availability and environmental conditions limit plant colonization (Lami et al, 2021; Méndez‐Toribio et al, 2020), whereas competition is manly acting in the later stages (Huston & Smith, 1987; Tatsumi et al, 2019). The study of beta‐diversity has been demonstrated to be a valuable tool to depict shifts in species composition (Baeten et al, 2012), and also along ecological successions (Puyravaud et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Different ways to success: Plant community trajectories over time and a soil moisture gradient in restored wetlands

Mosanghini

Oriolo²,

Boscutti

2022

Journal of Applied Ecology

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1. Ecological restoration is one of the most promising strategies to combat historical wetland losses caused by land use changes. Restored areas are ideal sites to study plant succession and changes in ecosystem functions over time. However, little is known about the influence of restoration on plant succession along environmental stress gradients. Knowing the processes and mechanisms driving the succession over time in contrasting abiotic conditions might provide new insight into the ultimate success of an ecological restoration.2. Relying on long-term vegetation monitoring, we studied the community succession of 4 plant communities along a restored waterlogging gradient in North-East Italy (from high to low soil saturation level): (i) Cladium fens, (ii) low alkaline fens, (iii) Molina wet meadows and (iv) dry meadows. We monitored 23 permanent plots distributed along the gradient, spanning from 1 to 21 years since restoration, and 4 plots as target vegetation (natural habitats). We analysed the changes in plant communities in terms of functional traits, diversity and species composition.3. We found that exotic and annual species decreased in mature stages of restoration while leaf dry matter content increased over time. Nutrient indicator value and leaf area showed opposite trends at the extreme points of the gradient. Across the successional stages, species richness decreased in Cladium fens and increased in alkaline fens and meadows. Species composition moved toward target vegetation showing contrasting dynamics between different restored habitats. Synthesis and applications.During succession waterlogging stress acts as main abiotic filter, triggering contrasting trajectories of plant communities. This filter seems to be stronger at the extreme points of the gradient generating opposite but faster dynamics than at intermediate conditions. Time and waterlogging promoted a continuous selection of species consistent to target vegetation in terms of richness, functional traits and composition. The evidenced trajectories suggest the need to develop habitat-specific protocols concerning the selection

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Different ways to success: Plant community trajectories over time and a soil moisture gradient in restored wetlands

Mosanghini

Oriolo²,

Boscutti

2022

Journal of Applied Ecology

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“…Interestingly, we found a significant effect of patch age (i.e., time since patch creation) on the relationship between alien and native residuals only in open‐field landscapes (i.e., where the matrix is submitted to intensive agriculture). In these landscapes, as native residuals change, alien residuals remain constant, suggesting that recent forest patches are rapidly colonized by alien species (i.e., alien species reach the expected value derived from the SAR rapidly) while the number of natives is much more variable, probably due to contrasted colonization abilities (Lami et al, 2021). We see three interacting factors shaping the alien/native assemblages along the observed succession (from recent to ancient forest patches): (i) patch invasibility, (ii) species' dispersal limitations and (iii) propagule pressure and its relation with alien species’ residence time.…”

Section: Discussionmentioning

confidence: 99%

There is room for everyone: Invasion credit cannot be inferred from the species–area relationship in fragmented forests

Trotta

Boscutti

Jamoneau

et al. 2023

Applied Vegetation Science

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QuestionsLand use change, habitat fragmentation and biological invasion represent major drivers of global change that strongly interact to alter ecosystems. Following the breaking apart of forests into smaller fragments or the afforestation of former agricultural lands, biodiversity experiences drastic changes due to species loss and turnover over time. This leads to two important outcomes, namely extinction debt and invasion (colonization) credit, which both reflect the inertia of the system's response to environmental changes. Our study investigated the following questions: Is it possible to infer invasion credit from species–area relationship (SAR) residuals both for native and alien plants? Is there any trend linked with the degree of habitat fragmentation through time? LocationSomme, Oise and Aisne departments, northern France.MethodsWe analyzed the pattern of SARs' residuals for native and alien vascular plant species separately across nine sets of forest fragments that differ by the landscape matrix they are embedded in (i.e., open field, bocage, forest), while considering plant richness, area and age of the 355 forest patches.ResultsThe relationship between alien and native SARs’ residuals is positive across all landscapes, suggesting a lack of invasion credit. Instead, these results support the “rich get richer” hypothesis, that is a high environmental heterogeneity allows colonization by new species, be they native or alien. Interestingly, the relationship between alien and native residuals depends upon fragment age (i.e., time since patch creation) in the most intensively managed landscapes (i.e., open fields). In the latter, recent forest patches are more prone to alien invasion, as a likely consequence of increased alien propagule pressure (i.e., more sources and vectors for alien plants), increased forest invasibility (i.e., disturbance‐induced environmental heterogeneity), and decreased matrix permeability (i.e., natives are more dispersal‐limited than aliens).ConclusionsOur study provides new insights into alien species ecology, by showing that (i) it is not possible to infer “invasion credit” from the SAR's residuals; (ii) the invasion rate by alien species in forest fragments increases with their native species richness, and (iii) this relationship depends upon patch age in intensively managed landscapes.

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“…There are many causes for this, such as presence, perhaps overwhelmingly, of competitive aliens (Holl 2020; Lami et al 2021). Prach and Walker (2020) estimated aliens influence about a quarter of primary successions, though these are less susceptible to aliens than secondary successions, because less exposed to anthropic disturbance.…”

Section: The Links Between Vegetation Succession and Restorationmentioning

confidence: 99%

“…Natural biomass is initially low in both restoration and secondary succession, the latter being initiated by disturbance events, which, definitionally, remove biomass (Grime 1979). Plant species' diversity is also low initially, with aliens dominating in both richness and cover (Boscutti et al 2017; Lami et al 2021). In restorations, native species are routinely added, though often not in sufficiently great diversity to mimic natural systems (Hughes et al 2018).…”

Section: Comparison Between Successions and Restorationmentioning

confidence: 99%

Tertiary succession: a new concept to help vegetation restoration

Rapson

2022

Restoration Ecology

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Restoration is the human activity of manipulating vegetation with the aim of accelerating attainment of stable vegetation. But current procedures seem to arrest succession instead. A comparison of primary and secondary successions with restoration activities suggests there is little overlap in these concepts. Thinking of the process of restoration as a tertiary succession helps highlight managerial options which may improve success, especially by addressing environmental and biological legacies.

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Habitat type and community age as barriers to alien plant invasions in coastal species-habitat networks

Cited by 9 publications

References 80 publications

Different ways to success: Plant community trajectories over time and a soil moisture gradient in restored wetlands

Different ways to success: Plant community trajectories over time and a soil moisture gradient in restored wetlands

There is room for everyone: Invasion credit cannot be inferred from the species–area relationship in fragmented forests

Tertiary succession: a new concept to help vegetation restoration

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