Effect of cattle integration on the diversity of predatory Reduviidae in oil palm plantation, Central Kalimantan, Indonesia

Cattle grazing activity in oil palm plantation is known to cause the loss of non-crop vegetation and may affect species richness and abundance of predatory insect. The objective of this research was to study the effect of regeneration time after grazing on species richness, abundance, and species composition of predatory insects in oil palm-cattle integrated plantation. Predatory insects were collected from 3 grazed blocks and 3 ungrazed blocks of oil palm plantation. The observations were conducted at 4 periods i.e. 1 day before cattle grazing activity, 30 d after grazing, 60 d after grazing, and 90 d after grazing. The result of this research showed that regeneration time after cattle grazing activity does not affect species richness but caused a decrease in abundance and changes in species composition of Reduviidae at 30 d after grazing. The most dominant morphospecies are Cosmolestes sp. and Reduviidae sp. 4. Recovery of understorey vegetation after 90 d provide a stable ecosystem for Reduviidae recolonization.