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Microbiology and biochemistry of placer rich beach sediment: Short-term response to small scale simulated mining

DRS at CSIR-National Institute of Oceanography

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Title Microbiology and biochemistry of placer rich beach sediment: Short-term response to small scale simulated mining
 
Creator Fernandes, C.E.G.
Das, A.
Faria, D.
LokaBharathi, P.A.
 
Subject Placers; Microbiological analysis; Biochemical analysis; Beaches; Sediments; Bacteria; Mining; Mineral resources
 
Description In order to understand the influence of sand mining on the bacterial community of a placer rich beach ecosystem, a mechanical disturbance was simulated in Kalbadevi beach, Ratnagiri. Core samples from dune, berm, high tide, mid tide and low tide were examined for changes in the distribution of bacterial abundance and biochemical parameters up to a depth of 40cm. Average core values (n = 4/core) are examined in this study before and after disturbance. With disturbance, the bacterial abundance decreased from 10 sup(6) cells.g sup(-1) dry sediment by an order. Both direct aerobic and anaerobic viability marginally decreased. Retrievable counts on 0.01% and 0.001% strength nutrient broth in seawater agar showed 23% and 71% increase immediately after disturbance. The proteins, carbohydrates and lipids, which are the constituents of labile organic matter, did not vary significantly. The changes in these levels of the biochemical are marked only at berm and dune and masked at the other three levels by the tidal influence. ATP an index for living biomass was reduced drastically. Thus, the short-term effect showed that the simulated disturbance had a mixed effect on the microbiology and biochemistry of the sediments. It reduced total bacterial counts, total viable counts, and ATP with little effect on concentration of biochemical parameters. However, simulated mining improved the retrievability of bacteria by an order.
 
Date 2008-02-22T06:20:32Z
2008-02-22T06:20:32Z
2005
 
Type Conference Article
 
Identifier National Seminar on Development Planning of Coastal Placer Minerals (PLACER - 2005), eds. Loveson, V.J.; Chandrasekar, N.; Sinha, A. 248-255p.
http://drs.nio.org/drs/handle/2264/994
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Allied, India