COFFEE AGROFORESTS Scroll down to see more content We study how coffee farm management affects ant abundance and biodiversity and the role of ants as predators. We have documented that ants, especially twig-nesting ants, prey on the worlds most important insect pest, the coffee berry borer. We have manipulated twig-nesting ant nest sites to determine how competition from arboreal and ground-nesting ants as well as habitat type influence nest colonization. We have studied coffee pollination and how coffee management and presence of aggressive ants influence coffee floral microbes. We examine how epiphyte abundance and diversity changes with coffee management, and if presence of aggressive ants hinders epiphyte colonization. We have documented changes in leaf hopper diversity with coffee farm management. We have used lab experiments to document strong trait-mediated effects of phorid flies on Azteca ants, and increases in importance of ant biodiversity for predation services. We have examined how the entrance sizes of nests for twig-nesting ants influence community assembly processes. We use twig-nesting ants as model systems to study how land management, competition, and environmental factors influence community assembly. We have examined how coffee shade management and excluding ants and bees from plants influences the coffee yields and fruit weight. We have examined nectar production by coffee shade trees and how nectar quality and quantity differs with coffee agroecosystem management. We have documented that functional diversity of birds in coffee agroecosystems correlates with more efficient insect pest control.