Extended leaf phenology in deciduous forest invaders: mechanisms of impact on native communities

Smith, Lauren M.

doi:10.1111/jvs.12087

Cited by 38 publications

(41 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In deciduous forests, invasive plant species often have extended leaf phenologies that may confer an advantage to them over neighboring native plant species (Fridley 2012, Smith 2013. In deciduous forests, invasive plant species often have extended leaf phenologies that may confer an advantage to them over neighboring native plant species (Fridley 2012, Smith 2013.…”

Section: Discussionmentioning

confidence: 99%

Geographic variation in apparent competition between native and invasive Phragmites australis

Bhattarai

Meyerson

Cronin

2017

Ecology

View full text Add to dashboard Cite

Apparent competition, the negative interaction between species mediated by shared natural enemies, is thought to play an important role in shaping the structure and dynamics of natural communities. However, its importance in driving species invasions, and whether the strength of this indirect interaction varies across the latitudinal range of the invasion, has not been fully explored. We performed replicated field experiments at four sites spanning 900 km along the Atlantic Coast of the United States to assess the presence and strength of apparent competition between sympatric native and invasive lineages of Phragmites australis. Four herbivore guilds were considered: stem-feeders, leaf-miners, leaf-chewers and aphids. We also tested the hypothesis that the strength of this interaction declines with increasing latitude. Within each site, native and invasive plants of P. australis were cross-transplanted between co-occurring native and invasive patches in the same marsh habitat and herbivore damage was evaluated at the end of the growing season. Apparent competition was evident for both lineages and involved all but the leaf-chewer guild. For native plants, total aphids per plant was 296% higher and the incidence of stem-feeding and leaf-mining herbivores was 34% and 221% higher, respectively, when transplanted into invasive than native patches. These data suggest that invasive P. australis has a negative effect on native P. australis via apparent competition. Averaged among herbivore types, the indirect effects of the invasive lineage on the native lineage was 57% higher than the reverse situation, suggesting that apparent competition was asymmetric. We also found that the strength of apparent competition acting against the native lineage was comparable to the benefits to the invasive lineage from enemy release (i.e., proportionately lower mean herbivory of the invasive relative to the native taxa). Finally, we found the first evidence that the strength of apparent competition acting against the native lineage (from stem-feeders only) decreased with increasing latitude. These results suggest that not only could apparent competition be of tantamount importance to enemy release in enhancing the establishment and spread of invasive taxa, but also that these indirect and direct herbivore effects could vary over the invasion range.

show abstract

Section: Discussionmentioning

confidence: 99%

Geographic variation in apparent competition between native and invasive Phragmites australis

Bhattarai

Meyerson

Cronin

2017

Ecology

View full text Add to dashboard Cite

show abstract

“…Contrary to competitive networks, such trophic structures have received much more attention in the literature, particularly in the last years (Bohan, Dumbrell, & Massol, ; Hui & Richardson, ). Examples range from mutualistic interactions in plant–pollinator networks (Aizen, Morales, & Morales, ; Minoarivelo & Hui, ; Traveset & Richardson, ) and plant–rhizobia networks (Le Roux, Hui, Keet, & Ellis, ) to antagonistic interactions mainly in food webs (David et al, ; Patterson et al, ; Smith, ). It is therefore not my intention to provide here a summary of how prior work has established connections between these trophic networks and invasion biology.…”

Section: Invasion In Trophic Networkmentioning

confidence: 99%

Coexistence theory as a tool to understand biological invasions in species interaction networks: Implications for the study of novel ecosystems

Godoy

2019

Functional Ecology

View full text Add to dashboard Cite

Questions related to understanding which characteristics of the recipient communities make them vulnerable to invasion (i.e. invasibility) are commonly formulated in such a way that they consider ecological communities as whole entities. Yet, species within recipient communities have specific responses to the introduction of exotic species. As a consequence, little is known about the role of species interaction networks within and between trophic levels in determining the invasion likelihood of exotics introduced in previously uninvaded communities and the temporal dynamics of invaded communities. To obtain a mature understanding of invasion processes and their impacts, I propose here to apply a structural stability approach of species coexistence to the field of biological invasions. The main aim here is to distinguish how direct and indirect species’ responses to invasion in competitive and trophic networks translate to the mechanisms determining the maintenance and stability of species diversity in multispecies and multitrophic assemblages. This approach brings the further opportunity to integrate the field of biological invasions within a broader perspective about the study of novel ecosystems, that is, ecosystems that contain exotic species and face new introductions sometimes under abrupt environmental changes. Moreover, it can help to target specific mechanisms separating winners from losers in novel ecosystems. Synthesis. A solid framework to predict biological invasions and understand community assembly along temporal scales under novel ecosystems can be obtained by framing species’ responses to invasion within recent theoretical and methodological advances stemming from coexistence theory, which seeks to determine how diversity is maintained. A plain language summary is available for this article.

show abstract

“…Invasive species in other systems have been shown to be good competitors for space and light by shading out native plants (Smith 2013). For example, bush honeysuckle is known to reduce native understory plant diversity via shading .…”

Section: Discussionmentioning

confidence: 99%

Invasive plants as drivers and passengers of community change in a disturbed urban forest.

Masters¹

View full text Add to dashboard Cite

Invasive species can impact local ecosystems by decreasing biodiversity and local abundances of native species. Invasive species also frequently establish in disturbed habitats. An invasive species may dominate a habitat because the introduced species is a superior competitor (driver model) for resources or because the introduced species is more tolerant of noncompetitive processes such as anthropogenic disturbance that reduces the diversity and abundance of native species (passenger model).Ranunculus ficaria (Ranunculaceae) is an invasive plant species in the northeastern United States, and can be especially dense in urban riparian habitats. It emerges early and forms thick mats of vegetation that may outcompete other plants for resources. It also produces an abundance of showy flowers that may impact local pollination service. The urban riparian habitats where this species occurs are also subject to intense flooding events that can alter the riparian corridor and eliminate plants not adapted to this disturbance. This work examines R. ficaria's role in the community changes associated with a highly disturbed urban riparian habitat. I studied R. ficaria tolerance of leaf litter disturbance associated with flooding, as well as its direct competitive effects on other species. I also examined how R. ficaria alters pollinator v services in invaded areas. To gain insight into how removal of an invasive species affects arthropod assemblages and associated ecosystem services, I also compared arthropod diversity, abundance, and decomposer and nectarivore functional groups in plots invaded with Lonicera maackii (bush honeysuckle) and removal plots.I found that R. ficaria is tolerant of changes in leaf litter depth caused by flooding.It can also negatively impact the sprouting and growth of native species, probably through competition for space. I generally found positive impacts on pollination services in invaded areas, but I found low seed set in one native species, possibly due to the degraded habitat. Removal of L. maackii produced only small changes in arthropod abundance and diversity, suggesting either little initial impact of invasion, quick recovery of arthropod groups after biomass removal of L. maackii, or a shift to an alternative stable state following L. maackii invasion. Our results suggest that R. ficaria can act as a passenger, tolerating aspects of hydrological disturbance that other species cannot.However, this species can also drive low abundance and diversity through resource competition. Lonicera maackii appears to be acting as a passenger in this system with little impacts on native arthropod communities. These results have ecosystem management implications for both of these invasive species. While removal of L. maackii would likely have little impact on arthropod ecosystem services, removal of R. ficaria would negatively impact pollination services in an already degraded habitat.vi

show abstract

Extended leaf phenology in deciduous forest invaders: mechanisms of impact on native communities

Cited by 38 publications

References 59 publications

Geographic variation in apparent competition between native and invasive Phragmites australis

Geographic variation in apparent competition between native and invasive Phragmites australis

Coexistence theory as a tool to understand biological invasions in species interaction networks: Implications for the study of novel ecosystems

Invasive plants as drivers and passengers of community change in a disturbed urban forest.

Contact Info

Product

Resources

About