Changes in mangrove forest soils: a comparison between cultured and naturally inundated conditions |
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Authors: | Kabir Chowdhury MA |
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Institution: | (1) Department of Zoology, University of Guelph, Guelph, ON, N1G2W1, Canada |
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Abstract: | A study was carried out in three shrimp farms in a natural mangrove area at the southeastern part of Bangladesh that dealt
mainly with the changes in mangrove soil characteristics in both cultured and naturally inundated conditions. Some noticeable
changes were observed in case of soil pH, sulfate sulfur(SO4-S) and extractable aluminium (Al) where, soil pH has shown a negative correlation with the other two parameters. Al concentration
reached its minimum 145 days after pond preparation (DAP) proving that flooding for longer periods reduced the possibility
of acid and Al toxicity. Extractable sodium (Na) and potassium (K) gradually increased in the cultured ponds while in the
inundated ponds, Na concentration remained stable but K increased significantly at the end of the study period. Results of
the present study indicate that shrimp farming in an already depleted mangrove forest helps to improve soil quality but still,
other management and environmental concerns related to intensive shrimp culture are unavoidable and should be taken into account
before promoting such activities in mangrove areas. It is recommended that shrimp culture zone be established beyond the mangrove
fringe where possible, to enable mangroves to buffer aquaculture effluent.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | acid sulfate soil Bangladesh inundation mangrove shrimp culture |
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