Bereczki K., Hajdu, K., Báldi, A.: Effects of forest edge....(2015)

Bereczki, K., Hajdu, K., Báldi, A.
Effects of forest edge on pest control service provided by birds in fragmented temperate forests
Acta Zoologica Scientiarum Hungaricae 61(3): 289-304.
Csatolt dokumentum: 
Angol nyelvű összefoglaló: 

Controlling herbivorous insects by insectivorous birds is one of the most important
regulating services in forest ecosystems. The fragmentation of forests and the associated
increase of edge effect, however, influences forest bird communities and thereby may have an
impact on biological control via the modification of prey-predator interactions. In the present
study we aimed to examine how insectivorous bird abundance and their predation on artificial
caterpillars were affected by forest edges and vegetation structure in fragmented temperate
forests of southwest Hungary. We found an unexpected negative humped-shaped pattern for
predation rate as well as for bird abundance, having peaks both at the edge and in the interior
(50 m from the edge). We found a positive correlation between bird abundance and predation
rate, therefore the important role of birds in insect pest control was supported. Interestingly,
the abundance of insectivorous birds had negative relationships to forest structure variables,
such as tree basal area and tree species richness. This unexpected pattern may be a result of
the context-dependency of edge effects that can not be fully explained by our study. It
highlights the need for more studies to explore the general pattern of edge effect on insect pest