The textual contents deal with the existent natural diversity amongst algae and emphasize the necessity of generating reliable ecological and physiological database for their optimum utilization in human welfare. Different aspects of cyanobacterial ecology including their symbiotic relationship, enduring desiccation, tolerating heavy metal and salt stress and allelopathic interactions have been comprehensively discussed.

Biomonitoring and bioremediation of an aquatic ecosystem using algae has emerged as an economical and reliable method. Overviews on the interesting Prochlorophyta, biology of the genus Stigeoclonium, morphogenesis of tapered cynobacteria, polymorphism in Desmids, perspective in conjugation in Zygnemataceae, and morphology, cytotaxonomy and evolution of some oogamous green algal groups like Oedogoniales and Charaes, are aimed at providing relevant information to those dealing with basic Phycology.