Dr. Sven Erik Jørgensen is professor in environmental chemistry at the University of Copenhagen. He has received a master of science in chemical engineering from the Danish Technical University (1958), a doctor of environmental engineering (Karlsruhe University) and a doctor of science in ecological modelling (Copenhagen University). He is honourable doctor at Coimbra University, Portugal and at Dar es Salaam University (Tanzania). He has received the Einstein Professorship of the Chinese. Dr. Md. Nazrul Islam is a professor at the Department of Geography and Environment, Jahangirnagar University, Savar, Bangladesh. He received his Ph.D. from the Graduate School of Engineering, University of Tokyo, Japan. Besides, he has completed two year standard JSPS Postdoctoral Research Fellow on Marine Ecosystems Engineering Laboratory from University of Tokyo, Japan. Dr. Nazrul has visited as a researcher and has been invited as a speaker to several universities in Japan, USA, Australia, UK, Canada, China, South Korea, Germany, France, the Netherlands, Taiwan and Vietnam. He received "Best Young Researcher Award" from the International Society of Ecological Modeling (ISEM) for the outstanding contribution to the Ecological Modeling fields, and "Best Paper Presenter Award" from SautaiN in Kyoto, Japan, in 2010. Dr. Nazrul has been honored with "Young Scientist Financial Award" by the committee of International IOC/WESTPAC, Busan, South Korea. Dr. Nazrul has authored more than 100 peer-reviewed articles and authored 15 books and research volumes. He has published with CRC Press the handbook entitled Environmental Management of Marine Ecosystems jointly with late Prof. Sven Erik Jorgensen. Presently he is the Executive Editor-in-Chief of the journal Modeling Earth Systems and Environment, published by Springer International Publications.