Abstract
A comparative study in the relationship between mangrove seedling growth and heavy metalconcentrations in sediment was conducted at Carey Island, Malaysia. Two contrasting stations were chosen; naturalhabitat and reforestation site. Avicennia alba and Rhizophora apiculata were chosen as the test species. At thereforestation site, R. apiculata showed higher increments of stem height (1.74cm mth-1) compared to A. alba (1.28cm mth-1), although both species produced 1 leaf per month. On the other hand, A. alba showed better increment ofheight (2.17 cm mth-1) and produced 2 leaves per month in the natural habitat. R. apiculata has very slow growth, atonly 0.65 cm mth-1 and produced 1 leaf per month. Pearson correlation deducted that A. alba showed positivecorrelation in growth with Mg at the reforestation site, and with sulfate and chloride in natural habitat. At thereforestation site, R. apiculata showed positive correlation with Ca and Cu but did not record any significantcorrelation with those elements in the natural habitat.Keywords: Heavy metal, Straits of Malacca, mangrove, nutrients
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