Phytosociological study for seasonal comparison of herbaceous angiosperms in Narmada canal command area of Saurashtra region, Gujarat state, India
Ashok M Suthar, Rajkumar Yadav, Ketan Tatu, R D Kamboj
The Narmada canal command area (NCCA) of the Saurashtra region supports plethora of herbaceous angiosperms. The portion of NCCA located in Bhavnagar, Botad, Morbi and Surendranagar districts had been investigated for inventorying in pre-monsoon and post-monsoon seasons from February 2018 to November 2019 through quadrat and transect methods. The Narmada canal command area (NCCA) in Saurashtra region is inhabited by 201 species during the pre-monsoon season and 259 herbaceous species during the post-Monsoon season. In the canal command area density, abundance, frequency and species composition of various species of herbs and grasses varied seasonally. The Simpson diversity index changed only slightly indicating that species diversity did not change noticeably between pre-monsoon (lean) season and post-monsoon season. Moreover, Menhinick’s index of species richness also indicated that herbaceous plant species richness did not change noticeably from pre-monsoon to post-monsoon period in the NCCA. Relatively good status of species richness and species diversity of herbaceous species during pre-monsoon (lean) season possibly due to water availability from Narmada canal might be a reason for such insignificant difference between pre-monsoon and post-monsoon scenarios.