Bats Limit Insects in a Neotropical Agroforestry System
Exclosure experiments have demonstrated the effects of bird predation on arthropods. In a Mexican coffee plantation, we excluded foliage-gleaning bird and bat predators from coffee plants. Effects of bats and birds were additive. In the dry season, birds reduced arthropods in coffee plants by 30%; birds and bats together reduced arthropods by 46%. In the wet season, bats reduced arthropods by 84%, whereas birds reduced them by only 58%. We conclude that previous "bird" exclosure experiments may have systematically underestimated the effects of bats.
1 School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109, USA.
2 Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA.
* To whom correspondence should be addressed. E-mail: kimwg@umich.edu

在墨西哥咖啡种植场很普遍的三种食虫蝙蝠之一的Micronycteris microtus。
(图片来源:Science)


