Acknowledgments
We would like to acknowledge Delanta Woreda Agricultural and Rural
Developmental office for granting us permission to conduct this research
in Kotu forest. We also thank Ethiopian National Meteorological Agency
for providing rainfall and temperature data of the study area. We would
like to express our gratitude to the Ethiopian Ministry of Education for
financial support. We indebted to all field assistances for their
leading role during the field data collection.