1. Laboratory of Forest Ecology, Department of Plant Biology, Faculty of Science, University of Yaounde I, Yaounde, Cameroon
2. Conservation and Sustainable Natural Resources Management Network (Csnrm-net), Yaounde, Cameroon
3. Department of Biology, Higher Teachers’ Training College, University of Yaounde I, Yaounde, Cameroon
4. Institute of Agricultural Research for the Development (Irad), Yokadouma, Cameroon