Abstract
An ecological survey of earthworms was conducted at Satyajit Ray Film and Television Institute (SRFTI), Kolkata for the period of one year during August 2016-July 2017. The aim of the present study is to determine the abundance and diversity of earthworms under different land use pattern. Earthworms were collected from three different sites in SRFTI based on environment niches like grasslands, residential areas, bank of the water bodies etc., by hand sorting method. Total 8 species of earthworms were identified from 537 specimens collected and abundance plot of earthworm species were arranged by rank. The highest relative abundance of Metaphire posthuma found at the bank of water bodies, Metaphire peguana and Metaphire posthuma in residential areas and Metaphire peguana in grassland habitat, whereas the lowest relative abundance of Metaphire houlleti found in all the habitats. The highest number of species and genera were recorded in the residential areas, the least in grassland habitat. The diversity value also was highest in the residential areas with the lowest in grassland habitat. Though the highest evenness value found in the bank of the water bodies. The Dominance (d) Index value was the highest in grassland habitat with the lowest in the residential areas. The highest similarity was observed between bank of water bodies and grassland habitat.
Highlights
Earthworms have over 200 years of scientific attention (Satchell, 1983)
The presence of 8 species of earthworms under 6 genera and 3families were recorded from three sites of Satyajit Ray Film and Television Institute (SRFTI) campus
The highest relative abundance of earthworm species is found in Metaphire posthuma (25%) and the least in Metaphire houlleti (15%) at the bank of water bodies (Figure 1)
Summary
Earthworms have over 200 years of scientific attention (Satchell, 1983). They are the larger members of the Oligochaeta, Phylum Annelida. The study area SRFTI (Satyajit Ray Film and Television Institute) named after the legendary film maestro Satyajit Ray. The study area SRFTI (Satyajit Ray Film and Television Institute) named after the legendary film maestro Satyajit Ray This is an academic institution under the Ministry of Information and Broadcasting, Government of India situated at Kolkata, West Bengal. The campus spread over 40 acres, which houses the academic and administrative buildings, one guest house, student hostels and staff quarters. About one third of the area of the campus is still undeveloped, mostly swamps and fields with shrubs
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