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Plant growth aided by insect-feeding animals

Date:
April 7, 2010
Source:
University of California - Irvine
Summary:
Add insect-feeding birds, bats and lizards to the front lines of the battle against global climate change.

An Eastern Bluebird consumes a meal of leaf-eating caterpillar.
Credit: Photo by Mike Onyon

Add insect-feeding birds, bats and lizards to the front lines of the battle against global climate change.

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Summarizing the results of more than 100 experiments conducted on four continents, UC Irvine ecologist Kailen A. Mooney and colleagues found that these insect-gobbling animals increase plant growth by reducing the abundance of plant-feeding insects and the damage they do to the plant life that helps mitigate global warming.

Our efforts solidify the importance of birds, bats, lizards and other similar animals to ecosystem health, and underscores the importance of conserving these species in the face of global change," said Mooney, an assistant professor in ecology and evolutionary biology.

The results come at a time when the importance of birds and other insectivores as plant protectors has come into doubt, Mooney added. Studies on bird, bat and lizard diets show they devour both plant-feeding insects and the spiders and other insect predators that eat plant feeders.

Recognizing these complex feeding relationships, Mooney said it had become unclear whether animals like birds reduce plant-feeding insect populations, or whether they might in fact be protecting them from spiders and the like.

"It has long been hypothesized that birds and other insect-feeding animals may protect plants by keeping plant-feeding insects in check in accordance with the adage, 'The enemy of my enemy is my friend,' " Mooney said. "Our study provides the most comprehensive support of this hypothesis to date. It shows that despite feeding on predatory insects, birds, bats and lizards still act as plant protectors by having net negative effects on plant-feeding insects."

Study results appear in early online edition of the Proceedings of the National Academy of Sciences the week of April 5.

Daniel S. Gruner of the University of Maryland; Nicholas A Barber of the University of Missouri, St. Louis; Sunshine A. Van Bael of the Smithsonian Tropical Research Institute in Panama; Stacy M. Philpott of the University of Toledo; and Russell Greenberg of the Smithsonian Migratory Bird Center in Washington, D.C., contributed to this study.


Story Source:

The above story is based on materials provided by University of California - Irvine. Note: Materials may be edited for content and length.


Journal Reference:

  1. Mooney et al. Interactions among predators and the cascading effects of vertebrate insectivores on arthropod communities and plants. Proceedings of the National Academy of Sciences, 2010; DOI: 10.1073/pnas.1001934107

Cite This Page:

University of California - Irvine. "Plant growth aided by insect-feeding animals." ScienceDaily. ScienceDaily, 7 April 2010. <www.sciencedaily.com/releases/2010/04/100407134819.htm>.
University of California - Irvine. (2010, April 7). Plant growth aided by insect-feeding animals. ScienceDaily. Retrieved January 30, 2015 from www.sciencedaily.com/releases/2010/04/100407134819.htm
University of California - Irvine. "Plant growth aided by insect-feeding animals." ScienceDaily. www.sciencedaily.com/releases/2010/04/100407134819.htm (accessed January 30, 2015).

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