Analysis of Soil Parameters Causing Dieback in Sundarbans
American Journal of Environmental Protection
Volume 3, Issue 3, June 2014, Pages: 162-171
Received: Jun. 16, 2014; Accepted: Jun. 30, 2014; Published: Jul. 10, 2014
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Awal, Mohd Abdul, Founder & Chief Advisor, Health & Pollution Research Farm, 23-09-37 Avenue, Apt, No: 1, Long Island City, New York, USA
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Abstract
A Sundarbans mangrove in Bangladesh is facing tremendous problems of heavy metal contaminations in soil (Awal, 20014). The present work has explored some of the possible parameters involved, focussing particularly on the relationship between the amount of top-dying in different places and the concentrations of a number of chemical parameters present in the soil, in order to test the hypothesis that chemical pollution might be responsible (Awal, 2014). Other factors such as the pH, salinity and nutrient status were also assessed (Awal 2014). Nine plots were selected for sampling of soil in order to categorise different areas in terms of their intensity of top-dying (Awal 2007). 63 soil samples were tested, mainly by ICPMS, to investigate certain parameters of the soil such as Sn, Exchangeable K, Soil pH, Pb, Zn, Ni, EC, soil nutrients, soil moisture content, and elemental concentrations of 32 other elements (Awal 2009). The vegetation structure was assessed in terms of tree height, bole diameter, species present, and regeneration status; and the intensity of top-dying within the plots was recorded on a rank scale. Most of the elements studied had no significant correlation with the top dying of Heritiera fomes. However, Sn, Exchangeable K, and soil pH were significantly related, and three elements, namely Pb, Zn, Ni, were also close to significance (Awal, 2007). Sn concentration is negatively associated with top dying. Soil pH varied significantly in the different plots (Awal 2007). Exchangeable K was positively associated with the tree diameter whether the top dying was severe or mild (Awal 2007). However, the present results have showed that Sn, Exchangeable K, soil pH, Pb , Zn and Ni could be directly linked with top-dying of Heritiera fomes (Sundri) in Sundarbans, probably particularly by weakening the vigour of the trees and allowing other parameters such as pathological agents to attack the plants (Awal, 2007).
Keywords
Environmental Parameters, Environmental Factors, Causal Parameters, Soil Parameters, Heritiera fomes, Heavy Metal Concentrations in Soil of Sundarbans, Dieback of Sundarbans, Sundarbans, Top-dying
To cite this article
Awal, Mohd Abdul, Analysis of Soil Parameters Causing Dieback in Sundarbans, American Journal of Environmental Protection. Vol. 3, No. 3, 2014, pp. 162-171. doi: 10.11648/j.ajep.20140303.18
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