‘Optha’: A Big Data based web tool for reusable data search in Ophthalmology

Abstract :

The present article deals with the spatial distribution pattern of birds in the Nilgiri Hills. The study was conducted in South and North forest division of Nilgiri. The survey was mainly focused at 16 locations. Line transect method was followed and survey was conducted in two different seasons namely summer and winter, collected data were analysed for species richness, diversity, abundance and relative abundance. A total of 6421 birds belonged to 139 species were recorded, which includes 37 families. Among them 11 species were endemic, 9 were migrants, 26 were local migrants, two rare and 91 residents. Coonoor had the highest species diversity and the lowest in Doddabetta. The habitat survey showed that there were more species recorded in shola forest (102) and the species richness was lowest near the settlement. Bray-curtis cluster indicated maximum similarity between the shrub and grassland (54.9%) and minimum between shola and suburban (6.74%). shola had the maximum similarity with plantation (34%) while cultivation had with grassland (56.26%) and water bodies with grassland (35.1). Cluster analysis of the bird species in different habitats showed two major clusters. The composition of birds associated with the water bodies was distinctive in all four habitats. A total of ten feeding guild were identified. Among which the insectivores were dominant in all habitats.