[1]Department of Botany Maseno University Private Bag Maseno Kenya;
[2]Department of Biological Sciences Jaramogi Oginga Odinga University of Science and Technology P.O Box 210-40601 Bondo Kenya;
[3]Department of Plant Ecology University of Bayreuth D-95440 Bayreuth Germany;
Plant diversity; Grazing; Rainfall; Moist savannah;