JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
Read Journal
    Current Issue
    Journal Archives
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status

Search the Journal web-site through Google:

        Abstract - Issue 2 2012, 33 (2)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Seasonal distribution of Isotomina thermophilan in a secondary

succession and a homegarden in Cachar, Assam


Author Details


Ranabijoy Gope

(Corresponding author)

Department of Ecology and Environmental Science, Assam (Central) University, Silchar - 788 011,



D.C. Ray

Department of Ecology and Environmental Science, Assam (Central) University, Silchar - 788 011,





Publication Data

Paper received:

26 July 2010


Revised received:

10 December 2010



08 January 2011



Present investigation was carried out in Cachar district of Assam over a period of two years (May 2007 - April 2009) to understand the seasonal ecology of Isotomina thermophila (Axelson, 1900) in secondary succession and homegarden ecosystems. Population was found to be maximum during July 2008 (7949.05 No. m-2) and September 2008 (7949.05 No. m-2) in homegarden whereas the peak was recorded in secondary succession during September 2008 (13656.05 No. m-2). Least population was encountered during March 2008 (1222.93 No. m-2) and April 2008 (1630.57 No. m-2) in homegarden and secondary succession, respectively. It may be due to the fact that, vital activity of this species effected in the dry period or migrate towards lower soil profile in search of food and moisture. Linear regression analysis established the hypothesis that all the environmental variables showed positive and significant influence on the population dynamics whereas in homegarden, rainfall (r= 0.36, p>0.05) did not show any influence. In multiple regression analysis positive and significant influences (p<0.05) were recorded for both the investigated sites. Rainfall, relative humidity and temperature facilitated the soil moisture, microbial activity, litter decomposition may favour the reproduction and growth rate of the species. Among microclimatic conditions except soil pH all other parameters exhibited significant correlations (p<0.05) with population. Based on the present investigation, it can be concluded that I. thermophilia does not differ much with the general ecology of collembolans in this sub humid climate.

Key words

Climatic variables, Total nitrogen, Multiple regression, Isotomina thermophila, Seasonal ecology


Copyright 2012 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).