Nonhost neighborhood increases biocontrol weevil damage to the nontarget, federally threatened Pitcher's thistle (Cirsium pitcheri)

Hakes, Alyssa S.; Meunier, Zechariah D.

doi:10.1016/j.gecco.2018.e00376

Cited by 3 publications

(2 citation statements)

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“…Investigating their potential impacts on other community interactions is critically important in future studies (Chaneton et al., 2010; Lopez‐Nunez et al., 2017; Sotomayor & Lortie, 2015). Lastly, in line with other studies demonstrating the unintended effects of introduced insects attacking non‐target plants (Hakes & Meunier, 2018; Noonburg & Byers, 2005; Russell et al., 2007), our results indicate the need of caution when introducing herbivorous insects for biological control of exotic weeds. Introducing exotic herbivores can enhance rather than attenuate the invasiveness of exotic plants by reinforcing the adverse effects of exotic plants on native plants (Lau & Strauss, 2005; Lenz & Taylor, 2001; Rand et al., 2004), especially in environments with a high density of a common herbivore.…”

Section: Discussionsupporting

confidence: 91%

An exotic herbivore reinforces competition between exotic and native plants

Sakata

Craig

2021

Journal of Ecology

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Despite increasing evidence that herbivore‐mediated indirect effects play a major role in plant competition, it is unclear how and when they contribute to plant invasiveness. The outcomes of herbivore‐mediated indirect effects are primarily dependent on the environment and have complex interactions with the direct interactions between plants. We evaluated the herbivore‐mediated indirect effects of Solidago altissima (Asteraceae) on other co‐occurring native Asteraceae species at multiple sites in a native range [the United States (US)] and in an introduced range (Japan) using common garden experiments. We examined the effect of S. altissima on herbivore damage, above‐ground vegetative and reproductive traits of the co‐occurring Asteraceae species at sites with different densities of a herbivore, the lace bug, Corythucha marmorata, which is native to the US and introduced in Japan. We observed increased lace bug herbivory in plants grown with S. altissima in Japan but decreased lace bug herbivory in the US. We did not find consistent effect of S. altissima on aboveground vegetative production of co‐occurring plants in either ranges. Flower production decreased in plants grown with S. altissima in Japan because of both direct competition and increased herbivory. Direct competition and apparent competition via lace bug herbivory interacted to produce a strong negative effect of S. altissima on co‐occurring plants only in Japan. Synthesis. The findings imply that evolutionary history and the local environment jointly affect herbivore‐mediated indirect effects, which play a large role in shaping the pattern of herbivory and plant competition. Another implication of our results is that exotic herbivores may reinforce the negative effects of exotic plants on native plants under high herbivore density environments.

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Section: Discussionsupporting

confidence: 91%

An exotic herbivore reinforces competition between exotic and native plants

Sakata

Craig

2021

Journal of Ecology

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“…On the other hand, a study that reviewed nontarget impacts of biological control agents found that few had a negative impact on native species (Hinz et al, 2019;Suckling & Sforza, 2014). However, there are reports that nonhost invasive plants (Sessions & Kelly, 2002) and native grass (Hakes & Meunier, 2018) may even enhance herbivory by providing a refuge to the exotic insect. Thus, the outcome of associational effects is largely dependent upon the environment surrounding the plant, including neighbor identity, palatability, and herbivore abundance.…”

Section: Indirect Interaction Via Introduced Herbivores Between Nativ...mentioning

confidence: 99%

Geographic variation and temporal changes in plant–herbivore interaction: Case studies with Solidago altissima in native and introduced ranges

Sakata

2021

Plant Species Biology

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Plants are subjected to environmental gradients and may encounter various herbivores, leading to geographic variation in defensive traits. The present review highlights that biological invasions are remarkable natural experiments for studying geographic variation in plant-herbivore interaction and tracking temporal dynamics in plant defense in response to environmental changes. Studies from this viewpoint can challenge various general topics in plant ecology, including the evolution of plant defense and indirect interactions among plants. First, I provide a brief overview on how the introduction of exotic herbivores drives rapid evolution after the establishment of exotic plants and its impacts on native plants. Second, I present a series of case studies investigating the patterns and mechanisms of geographic variation in the interaction between Solidago altissima and Corythucha marmorata (lace bug) in the native range in the United States and the introduced range in Japan. By combining

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