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Increased macrobenthic density and diversity: Indicator of recovery of Chilika Lake from environmental degradation

DRS at CSIR-National Institute of Oceanography

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Title Increased macrobenthic density and diversity: Indicator of recovery of Chilika Lake from environmental degradation
 
Creator Ingole, B.S.
 
Subject Benthos
Population density
Species diversity
Biodegradation
Indicator species
Dominant species; Faunal provinces; Environmental effects
 
Description Chilika lake, Orissa, India is the largest brackish water lagoon in Asia. Ecologically, it is boasted with a wealth of flora and fauna. The rich demersal fishery (especially of prawn, crabs and mollusks) of Chilika supports over 80,000 fishermen from 122 villages. However, Chilika has been facing with some natural and manmade problems, particularly frequent shifting of the mouth region reduced seawater inflow, siltation and encroachment. Impacts of the developmental activities, on the lake environment were evaluated by a detailed monitoring study conducted during September 1999 to February 2001. Results of the present investigation are part of the monitoring program and describe the effect of dredging activity on the macrobenthic assemblages. Data on the abundance of macrobenthic fauna (density and biomass) were collected from 30 different locations from across the entire stretch of Chilika. A spatially replicated before-after design was used. Sampling was conducted during three occasions (before dredging, during dredging and after dredging). The increased values of species diversity in post dredging phase suggest that opening of new lake mouth in November 2000 has not only enhanced the quantity of incoming seawater and facilitated an immediate recovery of macrobenthic communities.
 
Date 2008-08-04T04:35:37Z
2008-08-04T04:35:37Z
2002
 
Type Conference Article
 
Identifier Proceedings of the National Seminar on Creeks, Estuaries and Mangroves - Pollution and Conservation, 28th to 30th November, 2002, Thane. Ed. by: Quadros, G. 213-215p.
http://drs.nio.org/drs/handle/2264/1355
 
Language en
 
Publisher Vidya Prasarak Mandal's B.N. Bandodkar College of Science; Thane (India)