Evaluating Plant Invasions From Both Habitat and Species Perspectives

Chong, Geneva W.; Otsuki, Yuka; Stohlgren, Thomas J.; Guenther, Debra; Evangelista, Paul; Villa, Cynthia A.; Waters, Alycia

doi:10.3398/1527-0904(2006)66[92:epifbh]2.0.co;2

Cited by 17 publications

(23 citation statements)

References 41 publications

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“…2008). Wetlands were second‐most studied, and are often noted as more invasible due to increased levels of resources (high fertility and high moisture) (Fox & Fox 1986; Chong et al. 2006).…”

Section: Discussionmentioning

confidence: 99%

Lessons learned from invasive plant control experiments: a systematic review and meta-analysis

Kettenring¹,

Adams²

2011

Journal of Applied Ecology

500

506

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Summary1. Invasive plants can reduce biodiversity, alter ecosystem functions and have considerable economic impacts. Invasive plant control is therefore the focus of restoration research in invader-dominated ecosystems. Increasing the success of restoration practice requires analysis and synthesis of research findings and assessment of how experiments can be improved. 2. In a systematic review and meta-analysis of invasive plant control research papers, we asked: (i) what control efforts have been most successful; and (ii) what invasive plant control research best translates into successful restoration application? 3. The literature evaluated typically described experiments that were limited in scope. Most plot sizes were small ( <1 m 2 ), time frames were brief (51% evaluated control for one growing season or less) and few species and ecosystems (predominantly grasslands) were studied throughout much of the literature. The scale at which most experiments were conducted potentially limits relevance to the large scales at which restorations typically occur. 4. Most studies focused on invasive species removal and lacked an evaluation of native revegetation following removal. Few studies (33%) included active revegetation even though native species propagule limitation was common. Restoration success was frequently complicated by re-invasion or establishment of a novel invader. 5. Few studies (29%) evaluated the costs of invasive species control. Additionally, control sometimes had undesirable effects, including negative impacts to native species. 6. Synthesis and applications. Despite a sizeable literature on invasive plant control experiments, many large-scale invasive plant management efforts have had only moderate restoration success. We identified several limitations to successful invasive species control including: minimal focus on revegetation with natives after invasive removal, limited spatial and temporal scope of invasive plant control research, and incomplete evaluation of costs and benefits associated with invasive species management actions. We suggest that information needed to inform invasive plant management can be better provided if researchers specifically address these limitations. Many limitations can be addressed by involving managers in research, particularly through adaptive management.

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Section: Discussionmentioning

confidence: 99%

Lessons learned from invasive plant control experiments: a systematic review and meta-analysis

Kettenring¹,

Adams²

2011

Journal of Applied Ecology

500

506

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“…As a generalist species, B. tectorum has become widely distributed throughout the GSENM and persists in a broad range of habitat types and environmental conditions (Evangelista et al ., 2004; Guenther et al ., 2004; Chong et al ., 2006; Crall et al ., 2006). Field data collected during the landscape‐scale vegetation assessment found B. tectorum in 93% of the plots, making it the second most common species recorded in GSENM (Waters et al ., 2004).…”

Section: Discussionmentioning

confidence: 99%

Modelling invasion for a habitat generalist and a specialist plant species

Evangelista

Kumar

Stohlgren

et al. 2008

Diversity and Distributions

Self Cite

204

150

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Predicting suitable habitat and the potential distribution of invasive species is a high priority for resource managers and systems ecologists. Most models are designed to identify habitat characteristics that define the ecological niche of a species with little consideration to individual species’ traits. We tested five commonly used modelling methods on two invasive plant species, the habitat generalist Bromus tectorum and habitat specialist Tamarix chinensis, to compare model performances, evaluate predictability, and relate results to distribution traits associated with each species. Most of the tested models performed similarly for each species; however, the generalist species proved to be more difficult to predict than the specialist species. The highest area under the receiver‐operating characteristic curve values with independent validation data sets of B. tectorum and T. chinensis was 0.503 and 0.885, respectively. Similarly, a confusion matrix for B. tectorum had the highest overall accuracy of 55%, while the overall accuracy for T. chinensis was 85%. Models for the generalist species had varying performances, poor evaluations, and inconsistent results. This may be a result of a generalist's capability to persist in a wide range of environmental conditions that are not easily defined by the data, independent variables or model design. Models for the specialist species had consistently strong performances, high evaluations, and similar results among different model applications. This is likely a consequence of the specialist's requirement for explicit environmental resources and ecological barriers that are easily defined by predictive models. Although defining new invaders as generalist or specialist species can be challenging, model performances and evaluations may provide valuable information on a species’ potential invasiveness.

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“…However, the regional scale of this data set spans innumerable gradients, only some of which can be represented here, even with geospatial dimensions included. Of course annual grass cover responds to more than just biocrust cover (e.g., Chong et al 2006), and of course biocrust cover responds to more than just disturbance by cattle (e.g., Bowker et al 2007). The degree to which these factors may be used to control each other should be studied at local sites, as they already have been to Figure 3 Relationship between cattle disturbance and biocrust cover.…”

Section: Validation Of Hypothesesmentioning

confidence: 99%

Regional-scale relationship among biological soil crusts, invasive annual grasses, and disturbance

Peterson

2013

Ecol Process

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Introduction: Sagebrush ecosystems in western North America are being replaced by the invasion of annual grasses, particularly Bromus tectorum. In experimental situations and in localized landscapes, prior studies have documented that biological soil crusts (biocrusts) can reduce annual grass presence and that biocrusts are highly vulnerable to physical disturbance. Practical conservation would benefit from verification of these patterns at scales that matter to local economies. This study tests if these patterns appear at a regional scale. Methods: A previously collected data set of vegetation provided sampling of biocrust cover across the Great Basin within the state of Nevada, USA. Data were analyzed with non-parametric methods including odds ratios and generalized additive models (GAM). Results: From a data set of 608 vegetation plots within the Great Basin ecoregion, proportion of plots with high annual grass cover differed between sites with high versus low biocrust cover (p = 0.0015). A negative relationship between annual grass cover and biocrust cover was confirmed with GAM (p = 0.009). For a model of biocrust cover, cattle disturbance was found to be an explanatory variable (p < 0.00001). Conclusions: The patterns do appear at the regional scale, with high levels of cattle activity corresponding to low cover of biocrusts, and low cover of biocrusts corresponding to high cover of annual grasses.

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Evaluating Plant Invasions From Both Habitat and Species Perspectives

Cited by 17 publications

References 41 publications

Lessons learned from invasive plant control experiments: a systematic review and meta-analysis

Lessons learned from invasive plant control experiments: a systematic review and meta-analysis

Modelling invasion for a habitat generalist and a specialist plant species

Regional-scale relationship among biological soil crusts, invasive annual grasses, and disturbance

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