Impact of different type of plantations on the diversity of asteraceae in Doddabetta, Nilgiri district, Tamil Nadu
Mugendhiran S, Manikandan M, Sheeja BD, Shashikanth J
Doddabetta is the highest peak in Nilgiri Biosphere Reserve located at Nilgiri District (11025’19.48”N, 76043’ 42.20” E and 2516 m above msl). The present study deals with four types of plantations viz, Tea plantation, Pinus plantation, Acacia plantation, Eucalyptus plantation and the Sholas. The present investigation was carried out to compare the diversity of Asteraceae in Sholas and the different types of plantations. Details about a total of 102 species belonging to 53 genera of Asteraceae plants were recorded during the present study. Quantitative analysis such as density, frequency, and abundance of Tree Species, Shrubs and Herbs species were determined as per Curtis and McIntosh (1950). A total of 500 quadrates were studied during the present investigation. Tea plantation (34.99%) has the highest relative density of Asteraceae followed by Pinus plantation (33.64%), Acacia plantation (16%), Eucalyptus plantation (12.21%), and Sholas (6.5%). Difference in the distribution pattern in different plantations and Shola in the same altitude is well expressed. The canopy shape of different plantations, light availability to herbs and allelopathic interaction of plantation trees form and influence the diversity of Asteraceae in the Study area.