JEB logo

Journal of Environmental Biology

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

About Journal
    Home
    Obituary: Dr. R. C. Dalela
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
    About Triveni Enterprises
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Guidelines for Authors
    Terms and Conditions
    Author Resources
    Fees and Payments
    Track Paper Status
 

Google Search the Journal web-site:


    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,

India

e-mail: bijoyranagope@gmail.com

D.C. Ray

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

India

 

 

 

Publication Data

Paper received:

26 July 2010

 

Revised received:

10 December 2010

 

Accepted:

08 January 2011

 

Abstract

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).