Document Type: Primary Research paper
Plant species diversity of a natural (Gyawana) and a man-made (Kiri) lakes in the Upper Benue River Basin of Nigeria was carried out at monthly interval from January 2004 to December 2005, and a biological inventory of the plant species was conducted using the Direct Tally Method (DTM) and Point Centered Quarter (PCQ) plot less sampling techniques. A total of 84 plant species were recorded during the studies in Kiri and Gyawana lakes. Forty six (46) plant species belonging to 20 families were identified at Kiri Lake, while 38 plant species belonging to 17 families were identified at Gyawana Lake. There was a significant (p<0.01) difference in the number of aquatic macrophytes between the sites with Gyawana wetland ecosystem satisfying the criteria 1 and 2 for designation as Ramsar site. It is imperative therefore, that the Federal Ministry of Environment considers the designation of the site as Ramsar site.