"This review summarizes a literature survey of the marine macroalgae of the genus Ulva (Phylum Chlorophyta), covering the period of 1985 to 2012. The secondary metabolites isolated from members of this genus and biological activities of the organic extracts of some Ulva species as well as of the isolated metabolites are discussed. The emphasis on their application in food industry and their potential uses as biofilters are also addressed. Since then many taxonomists and phycologists have been involved in the identification of Ulva species which are notoriously difficult to classify due to the morphological plasticity expressed by many members as well as the few reliable characters available for differentiating taxa. Its morphology resembles bright green sheets, heavily influenced by environmental conditions, age of the thallus, and life style, making difficult the delineation of species by morphological features alone. There is an important relationship between morphological features of Ulva and salinity and nutrient concentrations in these freshwater habitats; however, the most essential physical factor positively correlated with mats development was water depth.
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Last date updated on July, 2014