International Journal of Environmental Sciences

Volume 2 Issue 4 2012           Pages:1895- 1903

Phytosociological analysis of riparian tree species of Alakyam stream; Pariyaram, Kerala, India

Author Information:

Manoj. K Department of Environmental Studies, Kannur University, Edat Post, Payyanur, Kannur, South India

Nandakumar M.K Department of Environmental Studies, Kannur University, Edat Post, Payyanur, Kannur, South India

Remya. M.P Department of Environmental Studies, Kannur University, Edat Post, Payyanur, Kannur, South India

Shinila. K Department of Environmental Studies, Kannur University, Edat Post, Payyanur, Kannur, South India

Divya lakshmi. P Department of Environmental Studies, Kannur University, Edat Post, Payyanur, Kannur, South India

ABSTRACT

Present study describes the phytosociological analysis of riparian tree species of a non perennial ‘Alakyam’ stream located at Pariyaram, Kannur District of Kerala. The vegetation of this stream bank consists of variety of herbs, shrubs, climbers and trees. Most of the species in this area belongs to either endemic or ‘RET’ categories (Rare, Endangered and Threatened Species). Phytosociological data of tree species of such type of vegetated area is scanty. Stratified random sampling method was adopted for quantification of the vegetation. A quadrate having 10M X10M size was adopted for sampling. A total of 25 such sampling plots were laid out to sampling approximately 10% of the study area. A total of 63 species of trees having GBH more than 15 cm size belonging to 37 families were recorded from 25 sample plots. The total density of tree species in the study area is 406.8/ha. The species having highest density is Hopea ponga (55.1/ ha). Hopea ponga is the most frequent species with a value of 70%. The species with maximum importance value index is Hopea ponga (17.22). In terms of Ecological status, 73% species of encountered trees are common. About 27% (Endemic & Common = 17% + Endemic RET’ =10) category of the flora (Trees) present in the study area is endemic to Western Ghats. About 10% of the tree species belongs to ‘RET’ category (Endemic & Endangered = 5%, Endemic & Rare = 2% and Endemic & Threatened = 3%). This study reveals the status of diversity of riparian tree species. The Phytosociological results indicate the need of adoption of a strong ecosystem management strategy particularly for the rare, endemic flora of this region. The riparian in order to protect them, conservation of the Alakyam stream is necessary.

Keywords: Phytosociology, Riparian species, Alakyam, Ecology, Hopea ponga

DOI: 10.6088/ijes.00202030072


© 2012 Copyright Manoj. K et al, licensee IPA.This is an open access article distributed under the Creative Commons Attribution License (2.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The electronic version of the article can be downloaded below.

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