Menu

Exotic and native plant species diversity in the Kenyan Rangelands

0 Comments


An inventory and assessment of exotic and native plant species diversity in the Kenyan range lands:

Case study of Narok North Sub-County

This is :

A botanical inventory and diversity of exotic and native species was assessed in the range land of Narok

North sub-County, Kenya. A total of 72 species were recorded, composed of 64 species of trees and

shrubs and eight species of herbs. They belonged to 34 families and 52 genera. Fabaceae was the

richest family with 16 species, followed by Euphorbiaceae (five), Moraceae and Myrtaceae (four each). In

total, 48 species were native and 24 exotics with a diversity index H of 1.082 and 0.604, respectively.

Hypericum revolutum, a native shrub, was the most dominant with an importance value of 3.81, followed

by three exotic species; Datura suaveolens (an invasive species), Dovyalis caffra and Hibiscus rosasinesis

with importance values of 3.40, 3.35 and 3.23, respectively. The native species were abundant in

undisturbed areas while the exotics were most common in areas with vegetation cover less than 60%.

Four invasive alien species were encountered namely; D. suaveolens, Lantana camara, L. trifolia and

Opuntia ficus-indica. They all had a high density that indicated greater establishment success. This

inventory affirms that the rangelands of Narok North are undergoing serious changes in vegetation

structure and composition due to human activities and requires urgent attention to conserve

biodiversity and genetic resources.

Winnie et al 2015

Tags: , ,

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Pin
Tweet
Share13
Share
+1
13 Shares
%d bloggers like this: