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Combining Local- And Large-Scale Models To Predict The Distributions Of Invasive Plant Species, Chad C. Jones, Steven A. Acker, Charles B. Halpern
Combining Local- And Large-Scale Models To Predict The Distributions Of Invasive Plant Species, Chad C. Jones, Steven A. Acker, Charles B. Halpern
Botany Faculty Publications
Habitat-distribution models are increasingly used to predict the potential distributions of invasive species and to inform monitoring. However, these models assume that species are in equilibrium with the environment, which is clearly not true for most invasive species. Although this assumption is frequently acknowledged, solutions have not been adequately addressed. There are several potential methods for improving habitat-distribution models. Models that require only presence data may be more effective for invasive species, but this assumption has rarely been tested. In addition, combining modeling types to form ‘ensemble’ models may improve the accuracy of predictions. However, even with these improvements, models …
Cruise Foraging Of Invasive Chameleon (Chamaeleo Jacksonii Xantholophus) In Hawai’I, Travis J. Hagey, Jonathan B. Losos, Luke Harmon
Cruise Foraging Of Invasive Chameleon (Chamaeleo Jacksonii Xantholophus) In Hawai’I, Travis J. Hagey, Jonathan B. Losos, Luke Harmon
Biology
We quantified the foraging behavior of the Jackson’s chameleon (Chamaeleo jacksonii xantholophus), an invasive insectivorous lizard species in Hawai’i. Using video taken in the field, we focused on percent time moving, moves per minute, and movement speeds. Our results supported previous findings that chameleons are ‘‘cruise foragers’’ (sensu Butler, 2005), a foraging behavior unlike almost all other species of lizards.
Biological Control: Effects Of Tyria Jacobaeae On The Population Dynamics Of Senecio Jacobaea In Northwest Montana, Kimberly Kay Crider
Biological Control: Effects Of Tyria Jacobaeae On The Population Dynamics Of Senecio Jacobaea In Northwest Montana, Kimberly Kay Crider
Graduate Student Theses, Dissertations, & Professional Papers
Biological control, using introduced, specialist insects is a common strategy for controlling plant invasions. However, the efficacy of biological control agents in controlling their host plants is rarely quantified population level. I quantified the impact of a specialist biological control agent, the cinnabar moth (Tyria jacobaeae) on its host plant, tansy ragwort (Senecio jacobaea) in northwest Montana. Cinnabar moth damage and its effects on important plant vital rates were tested with and without specialist herbivores. The presence of moth larvae corresponded to a reduction in population growth rates to less than one, compared to herbivore-free controls, indicating the potential for …