Can Plant Competition and Diversity Reduce the Growth and Survival of Exotic Phragmites australis Invading a Tidal Marsh?

Peter, Christopher R.; Burdick, David M.

doi:10.1007/s12237-010-9328-8

Cited by 29 publications

(24 citation statements)

References 63 publications

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“…This has given rise to research to assess feasibility of biological control for the introduced lineage in North America (Tewksbury et al 2002a;Blossey 2003;Häfliger et al 2006a, b;Blossey and Casagrande 2016). Interestingly, there appears to be important biotic resistance to the non-native lineage in less disturbed areas further from human impact (Taddeo and De Blois 2012) and with thriving native plant competitors (Peter and Burdick 2010).…”

Section: Study Speciesmentioning

confidence: 99%

Management of invasive Phragmites australis in the Adirondacks: a cautionary tale about prospects of eradication

et al. 2017

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Invasive plant management (largely mechanical and chemical) consumes an ever-increasing portion of budgets for land management organizations, but metrics of success, other than extent of areas treated or resources expended is rarely available. Here we assess success of managing 346 populations of invasive Phragmites australis (range 0.36-4134 m 2 ; cover 37-75%) in the Adirondack Park in upstate New York, USA. We began by treating 18 patches in 2010 using herbicide; gradually adding patches treated annually or intermittently for a total of 334 by the end of the project period. We monitored each population annually and if P. australis was present mapped its spatial extent and estimated cover. We considered P. australis eradicated when live stems were absent from a site for at least three consecutive years. Our treatments reduced size and cover of P. australis populations and eradication was achieved at 104 of 294 sites. However, probability of eradicating P. australis over a 7-year project timeframe was 0.83 for the smallest patches (0.36 m 2 ), whereas at medium (45 m 2 ) and large patches ([3000 m 2 ) probability of eradication decreased to 0.26 and 0.02, respectively. Our results question efficacy of managing large P. australis populations with the goal of eradication. We urge conservation organizations to clearly articulate management objectives beyond short-term suppression of target plants and to promote accountability by providing quantitative measurements of outcomes.

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Section: Study Speciesmentioning

confidence: 99%

Management of invasive Phragmites australis in the Adirondacks: a cautionary tale about prospects of eradication

et al. 2017

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“…; Frankow‐Lindberg et al . ) and specifically against P. australis (Peter & Burdick ). Field observational studies reported similar patterns at community scale (Levine ; Brown & Peet ), but opposite patterns at larger scale (Stohlgren et al .…”

Section: Discussionmentioning

confidence: 99%

“…Few studies have tested the relevance of biotic resistance to the restoration of wetland communities (Wang et al . ; Carlson, Kowalski & Wilcox ; Peter & Burdick ).…”

Section: Introductionmentioning

confidence: 99%

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Plant functional group identity and diversity determine biotic resistance to invasion by an exotic grass

2012

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Summary1. Biotic resistance, the ability of species in a community to limit invasion, is central to our understanding of how communities at risk of invasion assemble after disturbances, but it has yet to translate into guiding principles for the restoration of invasion-resistant plant communities. We combined experimental, functional, and modelling approaches to investigate processes of community assembly contributing to biotic resistance to an introduced lineage of Phragmites australis, a model invasive species in North America. We hypothesized that (i) functional group identity would be a good predictor of biotic resistance to P. australis, while species identity effect would be redundant within functional group (ii) mixtures of species would be more invasion resistant than monocultures. 2. We classified 36 resident wetland plants into four functional groups based on eight functional traits. We conducted two competition experiments based on the additive competition design with P. australis and monocultures or mixtures of wetland plants. As an indicator of biotic resistance, we calculated a relative competition index (RCI avg ) based on the average performance of P. australis in competition treatment compared with control. To explain diversity effect further, we partitioned it into selection effect and complementarity effect and tested several diversity-interaction models. 3. In monoculture treatments, RCI avg of wetland plants was significantly different among functional groups, but not within each functional group. We found the highest RCI avg for fast-growing annuals, suggesting priority effect. 4. RCI avg of wetland plants was significantly greater in mixture than in monoculture mainly due to complementarity-diversity effect among functional groups. In diversity-interaction models, species interaction patterns in mixtures were described best by interactions between functional groups when fitted to RCI avg or biomass, implying niche partitioning. 5. Synthesis. Functional group identity and diversity of resident plant communities are good indicators of biotic resistance to invasion by introduced Phragmites australis, suggesting niche preemption (priority effect) and niche partitioning (diversity effect) as underlying mechanisms. Guiding principles to understand and/or manage biological invasion could emerge from advances in community theory and the use of a functional framework. Targeting widely distributed invasive plants in different contexts and scaling up to field situations will facilitate generalization.

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“…The role of biotic resistance to invasions has been widely investigated in freshwater ecosystems. The importance of competition in biotic resistance has been shown for macrophytes, whose growth is reduced with increasing density and diversity of native species (Peter and Burdick, 2010;Michelan et al, 2013). Herbivory also plays a role in reducing invasive macrophytes abundance, as evidenced by the impacts of beavers on one species of invasive macrophyte in wetlands (Parker et al, 2007).…”

Section: Invasibility: Susceptibility Of Aquatic Communities To Invasionmentioning

confidence: 99%

Aquatic invasive species: challenges for the future

et al. 2015

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Humans have effectively transported thousands of species around the globe and, with accelerated trade; the rate of introductions has increased over time. Aquatic ecosystems seem at particular risk from invasive species because of threats to biodiversity and human needs for water resources. Here, we review some known aspects of aquatic invasive species (AIS) and explore several new questions. We describe impacts of AIS, factors limiting their dispersal, and the role that humans play in transporting AIS. We also review the characteristics of species that should be the greatest threat for future invasions, including those that pave the way for invasions by other species (''invasional meltdown''). Susceptible aquatic communities, such as reservoirs, may serve as stepping stones for invasions of new landscapes. Some microbes disperse long distance, infect new hosts and grow in the external aquatic medium, a process that has consequences for human health. We also discuss the interaction between species invasions and other human impacts (climate change, landscape conversion), as well as the possible connection of invasions with regime shifts in lakes. Since many invaders become permanent features of the environment, we discuss how humans live with invasive species, and conclude with questions for future research.

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Can Plant Competition and Diversity Reduce the Growth and Survival of Exotic Phragmites australis Invading a Tidal Marsh?

Cited by 29 publications

References 63 publications

Management of invasive Phragmites australis in the Adirondacks: a cautionary tale about prospects of eradication

Management of invasive Phragmites australis in the Adirondacks: a cautionary tale about prospects of eradication

Plant functional group identity and diversity determine biotic resistance to invasion by an exotic grass

Aquatic invasive species: challenges for the future

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