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Journal of Environmental Biology

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

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    Abstract - Issue Mar 2009, 29 (2)                                     Back


Ovarian development in Labeo dyocheilus (McClelland) during active

Macroinvertebrate colonization and breakdown of leaves in an astatic pond in south India

S. Dinakaran*, S. Anbalagan, S. Lingathurai and M. Martin

Centre for Research in Aquatic Entomology,  Department of Zoology, The Madura College, Madurai - 625 011,  India

(Received: January 09, 2005 ; Revised received: September 25, 2006 ; Re-revised received: November 15, 2006 ;  Accepted: December 03, 2006)

Abstract:Macroinvertebrate colonization and breakdown of Pongamia pinnata and Morinda tinctoria leaves were studied in an astatic pond in Madura College, Madurai. Morinda tinctoria leaves broke down faster than the leaves of P. pinnata. Breakdown capacities of astatic pond cannot be attributed to colonization of macroinvertebrates. Instead, microbial processing, and abiotic fragmentation are suggested as factors controlling breakdown rates. Tanypus sp (midge-larva) was abundant in leaf bags during the experimental period. This midge-larva appeared to use litter accumulations as a microhabitat that provided shelter and a rich supply of food in the form of organic matter. Their abundance and regular occurrence of two leaves suggest that midge larvae enhance leaf fragmentation and possibly mediate the incorporation of organic matter in pond sediments once the plant tissue is sufficiently macerated.

Key words: Colonization, Breakdown, Pongamia pinnata, Morinda tinctoria

PDF of full length paper is available with author (dinkarji@gmail.com)

 

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