Phosphorous fractionation in mangrove sediments of Kerala, south west coast of India: the relative importance of inorganic and organic phosphorous fractions
DRS at CSIR-National Institute of Oceanography
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Title |
Phosphorous fractionation in mangrove sediments of Kerala, south west coast of India: the relative importance of inorganic and organic phosphorous fractions
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Creator |
Resmi, P.
Manju, M.N. Gireeshkumar, T.R. Ratheeshkumar, C.S. Movitha, M. Shameem, K. Chandramohanakumar, N. |
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Subject |
GEOLOGY AND GEOPHYSICS
CHEMISTRY AND BIOGEOCHEMISTRY CHEMISTRY AND BIOGEOCHEMISTRY CHEMISTRY AND BIOGEOCHEMISTRY |
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Description |
The study of phosphorous dynamics in mangrove ecosystems of the northern Kerala coast aims to delineate its relationships with other biogeochemical parameters. Our intension is to check the validity of the hypothesis that these mangrove ecosystems act as an efficient trap of organic phosphorous by acting as P sink. The dissolved inorganic phosphate displayed higher concentration in monsoon that could be correlated with higher P leaching from mangrove litter as well as terrigenous input during wet season. Fe(OOH)equivalent P was much higher in monsoon (235.23 to 557.70 microg g-1) and lower in pre-monsoon (36.50 to 154.97 microg g-1), and displayed significant contribution towards the inorganic sedimentary P fractions. In monsoon, adsorption of P on iron hydroxides is enhanced by fresh water conditions, but pre-monsoon is characterised by the reductive dissolution of iron oxy hydroxides and the subsequent efflux of P to water column. CaCO3 equivalent Pinorg may be present as an inert fraction in the sediment matrix, and did not display any interrelationship with other geochemical parameters. The abundant total organic P (25 to 73 %) fractions, largely derived from P bound with humic/fulvic acid, played a major role in immobilising P and regulating its dynamics in the nearby estuarine and coastal environment
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Date |
2016-07-11T09:15:27Z
2016-07-11T09:15:27Z 2016 |
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Type |
Journal Article
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Identifier |
Environmental Monitoring and Assessment, vol.188; 2016; no.366 doi.:10.1007/s10661-016-5366-4
http://drs.nio.org/drs/handle/2264/4988 |
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Language |
en
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Rights |
An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2016] Springer
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Publisher |
Springer
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