Action: Avoid/minimize logging of important food tree species for primates
- One before-and-after study in Belize found that a black howler monkey population increased over 13 years after trees important for food for the species were preserved, alongside other interventions.
This intervention aims to reduce the impact of selective logging on primates by avoiding/minimizing the removal of tree species that represent important food sources to primates.
The avoidance of slashing climbers or lianas, trees housing them, hemi-epiphytic figs, and ground vegetation is discussed under ‘Avoid slashing climbers/lianas, trees housing them, hemi-epiphytic figs, and ground vegetation’.
Supporting evidence from individual studies
A before-and-after trial in 1985-1998 in secondary riparian forest in the Community Baboon Sanctuary, Belize, South America found that a population of black howler monkey Alouatta pigra, for which important food trees were preserved in large clearings alongside ten other interventions, increased by 138% over 13 years. The population increased from 840 to over 2,000 individuals (138% increase), although no statistical tests were carried out to determine whether this difference was significant. Additional interventions included the protection of the sanctuary by the communities surrounding it, preserving forest buffer strips along property boundaries and a forest corridor along the river, constructing pole bridges over man-made gaps, involving local communities in the management of the sanctuary, creation of a museum for education purposes, an eco-tourism and research programme, presence of permanent staff, and monetary (income from employment, tourism and craft industries) and non-monetary (e.g. better education) benefits to local communities for sustainably managing their forest and its wildlife communities. The study does not distinguish between the effects of the different interventions mentioned above.