Kursus ini merangkumi aras trofik sistem akuatik dan faktor yang mempengaruhi perubahannya. Penggunaan ekoteknologi dan biomanipulasi dalam pemulihan ekosistem tercemar serta pengurusan sistem akuatik air tawar ditekankan(This course covers the trophic levels of aquatic systems and factors controlling their changes. The use of ecotechnology and biomanipulation techniques in recovering polluted ecosystems as well as management of inland aquatic systems are emphasised)