Invasive plant species alters consumer behavior by providing refuge from predation

Humberto P. Dutra, Kirk Barnett, Jason R. Reinhardt, Robert J. Marquis, John L. Orrock

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Understanding the effects of invasive plants on native consumers is important because consumer-mediated indirect effects have the potential to alter the dynamics of coexistence in native communities. Invasive plants may promote changes in consumer pressure due to changes in protective cover (i. e., the architectural complexity of the invaded habitat) and in food availability (i. e., subsidies of fruits and seeds). No experimental studies have evaluated the relative interplay of these two effects. In a factorial experiment, we manipulated cover and food provided by the invasive shrub Amur honeysuckle (Loniceramaackii) to evaluate whether this plant alters the foraging activity of native mammals. Using tracking plates to quantify mammalian foraging activity, we found that removal of honeysuckle cover, rather than changes in the fruit resources it provides, reduced the activity of important seed consumers, mice in the genus Peromyscus. Two mesopredators, Procyonlotor and Didelphisvirginiana, were also affected. Moreover, we found rodents used L. maackii for cover only on cloudless nights, indicating that the effect of honeysuckle was weather-dependent. Our work provides experimental evidence that this invasive plant species changes habitat characteristics, and in so doing alters the behavior of small-and medium-sized mammals. Changes in seed predator behavior may lead to cascading effects on the seeds that mice consume.

Original languageEnglish (US)
Pages (from-to)649-657
Number of pages9
JournalOecologia
Volume166
Issue number3
DOIs
StatePublished - Jul 26 2011

Keywords

  • Foraging activity
  • Indirect effects
  • Loniceramaackii
  • Peromyscusleucopus
  • Predation risk

Fingerprint Dive into the research topics of 'Invasive plant species alters consumer behavior by providing refuge from predation'. Together they form a unique fingerprint.

Cite this