Seasonal variations on Organic and Inorganic components of Ulva pertusa with Environmental factors in Jeju, Korea

Abstract

Ulva pertusa is known to cause eutrophication in worldwide. This study, we confirmed Seasonal variations on organic and inorganic components of U. pertusa with environmental factors in two years. The environmental parameters have shown a clear seasonal variation and the greatest fluctuating seasonal period have been observed during from Jun to October. The nitrogen, carbon, amino acid, protein and lipid contents showed higher values in spring and lower values in summer. These values confirmed by the positive correlation found between these contents and negative correlation with temperature and positive correlation with salinity. Indeed, even though protein contents decreased, essential amino acids increased in summer periods (p<0.05). Carbohydrate chlorophyll and carotenoid contents did not showed correlation of temperature, salinity and nitrogen (p> 0.05), But these indicated positive correlation with carbon content (p<0.05). On the contrary, the maximum ash contents occurred during summer and decreased during autumn-winter. It also related to environmental effect by negative correlation with temperature (p< 0.01) and positive correlation with salinity (p<0.001). Especially, Ca and Fe contents of major element and Cu and Zn contents of trace element observed high amount compare with other elements in summer season. These patterns were increased sharply towards summer and the decreased during in autumn-winter months. This study determined biochemical compositions values of U. pertusa by idntifying their organic and inorganic components on the seasonal variations. We suggest that the aim of the present study was to determine ecological, physiological significance and knowledge of U. pertusa.