Invasive grass affects seed viability of native perennial shrubs in arid woodlands

Edwards, Kaisha M.; Schlesinger, Christine A.; Ooi, Mark K. J.; French, Kristine; Gooden, Ben

doi:10.1007/s10530-019-01933-x

Cited by 14 publications

(11 citation statements)

References 53 publications

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“…For example, high total and specific leaf area (Allred et al 2010), high germination rates (Deschenes et al 2019), specific mechanism of nitrogen acquisition (Laungani and Knops 2009), and chemical inhibition of native plant photosynthesis (Musil et al 2009) have all, among others, been identified as features of invasive plants contributing to their invasion success. Also, competition for space and resources during recruitment or the production of allelochemicals by invasive plants may prevent native species from growing populations that could resist the invasion (e.g., Edwards et al 2019;Esch et al 2018;Grove et al 2017).…”

Section: Assessing Vulnerability To Invasionmentioning

confidence: 99%

Assessing vulnerability and resistance to plant invasions: a native community perspective

Ibáñez

Lei

Petri

et al. 2021

Invasive plant sci. manag.

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Risk assessments of biological invasions rarely account for native species performance and community features, but this assessment could provide additional insights for management aimed at decreasing vulnerability or increasing resistance of a plant community to invasions. To gather information on the drivers of native plant communities’ vulnerability and resistance to invasion, we conducted a literature search and meta-analysis. From the data collected we compared native and invasive plant performance between sites with high and low levels of invasion. We then investigated under which conditions native performance increased, decreased, or did not change with respect to invasive plants. We analyzed data from 214 publications summing to 506 observations. There were six main drivers of vulnerability to invasion: disturbance, decrease in resources, increase in resources, lack of biotic resistance, lack of natural enemies, and differences in propagule availability between native and invasive species. The two mechanisms of vulnerability to invasion associated with a strong decline in native plant performance were propagule availability and lack of biotic resistance. Native plants marginally benefited from enemy release and from decreases in resources, while invasive plants strongly benefited from both increased resources and lack of enemies. Fluctuation of resources, decreases and increases, were strongly associated with higher invasive performance while native plants varied in their response. These differences were particularly strong in instances of decreasing water or nutrients, and of increasing light and nutrients. We found overall neutral to positive responses of native plant communities to disturbance; but natives were outperformed by invasive species when disturbance was caused by human activities. We identified ecosystem features associated with both vulnerability and resistance to invasion, then used our results to inform management aimed at protecting the native community.

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Section: Assessing Vulnerability To Invasionmentioning

confidence: 99%

Assessing vulnerability and resistance to plant invasions: a native community perspective

Ibáñez

Lei

Petri

et al. 2021

Invasive plant sci. manag.

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“…Whereas other serious weeds of central Australia, like Tamarix aphylla and Parkinsonia aculeata, are outcompeted by established natural vegetation or are largely restricted to agricultural or disturbed areas with enhanced water or nutrient availability (Grice & Martin, 2006), buffel is an aggressive invader of many Australian arid and semi‐arid zone habitats (Fensham, Wang, & Kilgour, 2015; Firn et al., 2015; van Klinken & Friedel, 2018). Buffel directly suppresses (Abella, Chiquoine, & Backer, 2012; Eilts & Huxman, 2013) and threatens the persistence of many native plants (Clarke et al, 2005; Edwards, Schlesinger, Ooi, French, & Gooden, 2019; Eyre, Wang, Venz, Chilcott, & Whish, 2009; Fairfax & Fensham, 2000; Friedel et al., 2006) including threatened species (Griffin, 1993; Jackson, 2005). Changes in vegetation composition and structure following buffel invasion also affect species and assemblages of fauna (Bonney, Andersen, & Schlesinger, 2017; Pavey & Nano, 2009; Read & Ward, 2011; Smyth, Friedel, & O’Malley, 2009; Williams, Mulligan, Erskine, & Plowman, 2012; Schlesinger, Kaestli, Christian & Muldoon, 2020; Young & Schlesinger, 2014) and may increase the risk of extinctions.…”

Section: Introductionmentioning

confidence: 99%

Ranking buffel: Comparative risk and mitigation costs of key environmental and socio‐cultural threats in central Australia

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Firn

Grice

et al. 2020

Ecology and Evolution

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Four contemporary ecological disruptions are widely recognized as dramatically and irreversibly recasting the ecology of Australia's arid and semi-arid zones which cover over 70% of the continent, namely alteration of fire regimes as a consequence of displacement of Aboriginal peoples practicing traditional land management; overgrazing and soil compaction caused by the introduction of large exotic herbivores; predation of native wildlife by introduced red foxes (Vulpes vulpes) and domestic cats (Felis catus); and degradation of soils

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“…Hence, our results indicate that the change in plant-pollinator network structure occurred due to the interaction rewiring mediated by the decline in floral resource availability and not by species turnover, or the turnover of plant functional traits. Also, despite the short-term resilience of our community in terms of functional diversity of floral traits, the persistence of invasive species in native communities may lead to cumulative changes (Strayer et al 2006;Edwards et al 2019;Yang et al 2019). Over the long term, such changes can have greater impacts on the community structure, reducing, even more, the species richness and abundance, which eventually will reduce the functional diversity and convert an originally diverse grassland community into a simplified pasture dominated by only a few species (Strayer et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Changes in plant community structure and decrease in floral resource availability lead to a high temporal β-diversity of plant–bee interactions

Hachuy‐Filho

Ballarin

Amorim

2020

Arthropod-Plant Interactions

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Biological communities are subject to spatiotemporal variations in community structure, i.e., species composition, richness, and abundance. Plant-pollinator interactions are affected by species composition and abundance, so that rapid changes in plant community structure can lead to critical impacts on plant-pollinator interactions at the community level. The extent of these impacts depends on how plants respond to different kinds of stressors, such as the disturbance caused by invading species. In this research, we conducted a before-and-after study to evaluate the potential effects of an invasive fast-growing alien grass species on the structure of a plant-pollinator interaction network. We described the changes in community structure and plant-pollinator interactions over two sampling periods, through the temporal β-diversity of plant and bee species, plant-bee interactions, and plant functional traits. Our results showed that changes in plant community composition (especially the plants in the network core) and decrease in plant species richness, as well as in floral resources availability impacted plant-pollinator interactions of a grassland community after the growth of a fast-growing alien grass species. These changes were accompanied by a decrease in plant-bee interaction diversity, and a high β-diversity of species interactions mainly due to interaction rewiring. However, we found no effect on the functional diversity of flowers. In conclusion, our study showed that a short-term change in plant species composition and floral resource abundance impacted plant-bee interactions, which markedly changed network structure and dynamics.

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Invasive grass affects seed viability of native perennial shrubs in arid woodlands

Cited by 14 publications

References 53 publications

Assessing vulnerability and resistance to plant invasions: a native community perspective

Assessing vulnerability and resistance to plant invasions: a native community perspective

Ranking buffel: Comparative risk and mitigation costs of key environmental and socio‐cultural threats in central Australia

Changes in plant community structure and decrease in floral resource availability lead to a high temporal β-diversity of plant–bee interactions

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