The Bioscan, 2 (2) 113-119,2007
An International Quarterly Journal of Life Sciences
web site: www.thebioscan.in 
INFLUENCE OF VEGETATIONAL COVER ON POPULATION DYNAMICS AND BIOMASS
OF A MEGASCOLOCID EARTHWORM LENNOGASTER PUSILLUS(STEPHENSON)
M.P.SINHA, D.K.GUPTA*, AKANKSHA SINGH, SWETA MALANI, MADHU PANDEY & MRIDULA KUMARI
Department of Zoology, Ranchi University, Ranchi - 834 008 *Department of Zoology, KCB College, Bero, Ranchi - 835 202 E-mail: m_psinha@yahoo.com

KEY WORDS

L.pusillus
S.robusta
A.auriculaeformis
E-citriodora
Population Density
Biomass


Received on: 13.09.2006

Accepted on: 21.01.2007


*Corresponding
 Author

ABSTRACT

The influence of vegetational cover on earthworm population dynamics and biomass of Lenogaster pusillus(Stephenson) a megascolocid endemic earthworm has been studied in three tropical forests of Shorea robusta Roxb.ex. Gaertn.f., Acacia auriculaeformis A.Cunn. ex. Benth and Eucalyptus citriodora Hook near Bero area, Ranchi. The maximum and minimum density(No m-2) of the worm varied from 415 + 53.19 to 75 + 18.70 in the forest of S.robusta, from 745 + 82.28 to 75 + 27.38 in A.auriculaeofrmis while from 598 + 25.10 to 35 + 19.49 in E.citriodora respectively with a variation in biomass as g dry wt m-2 of the species from 0.31 + 0.1 to 2.65 + 0.38, from 0.41 + 0.17 to 5.34 + 0.86 and from 0.19 + 0.1 to 3.72 + 0.24 respectively. The variation in population density and biomass of L.pusillus in three forest types was statistically (two ways ANOVA) significant, reflecting the influence of above ground biodiversity on earthworms (F = 9.903; df = 2,36; p < 0.001 and F = 8.133; df = 2,36; p < 0.005) respectively.The paper deals with the significance of vegetational cover on the worm and its size class.