Elemental composition of certain green seaweeds of porbandar reef

Variations of ash, C, N, P, Na, K, Ca and Mg contents were studied in Caulerpa scalpelliformis, Ulva lactuca and Codium dwarkense during December 1981 to February 1982, the period in which these algae complete their life cycle. Maximum ash, Na, K and Ca were observed during early growth, followed by N during middle and C and P during late growth periods. All the species proportionally accumulated more K and Ca, though the concentrations of Na and Mg in seawater were several folds more than K and Ca.