Seasonal Variation in Elemental Composition of Certain Seaweeds from Mandapam and Kilakarai Coast, Gulf of Mannar Biosphere Reserve
نویسنده
چکیده
Vegetative plants of certain seaweeds were collected from the natural habitat of Kilakarai and Mandapam coast were subjected to SEM-energy dispersive spectroscopic analysis and quantified the following minerals viz., Na, Mg, Si, S, Cl, K, Ca, Mn, P, Fe, Zn and Cr during summer, pre-monsoon, monsoon and post-monsoon seasons in 2007-2008. The order of preferential accumulation of elemental composition during summer 2007 in Sargassum wightii: Ca > Mg > Na > S > Fe > Si > Cl > K > Mn; Stoechospermum marginatum: Ca > Si > S > Mg > Mn > P > Na; Gracilaria corticata: Ca > Mg > Na > Si > Cl > S > Mn > K > Fe > P; Gracilaria verrucosa: Ca > Cl > Si > Mg > Na > P > S > Mn > Fe > K and Grateloupia filicinia: Ca > Cl > P > Si > Na > Cr > K. Seasonal distribution of elemental composition in the seaweeds showed that most of the minerals were high during the summer followed post-monsoon and monsoon seasons. This could perhaps be due to a ambient concentration of these minerals was high during these seasons thereby facilitating their uptake by seaweeds.
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