A.L. Ramanathan is a Professor in School of Environmental sciences, Jawaharlal Nehru University, New Delhi, India. He is leading the group working on coastal biogeochemistry and hydro geochemistry and has worked extensively on mangroves estuaries and coastal ground waters of India for the past two decades. He is actively engaged in coastal research with different institutions in India and from various parts of the world such as Australia, Russia, USA, etc, on nutrient dynamics, Biomarkers, paleo environment, nutrient source identification etc., He has guided two dozen PhDs in these aspects and published more than seven dozen papers in referred reputed journals like Estuaries, Wetland Ecology and Management, Estuarine, Coastal and Shelf Science, Journal of coastal research, Bull of Marine sciences, Indian journal of marine sciences, Marine pollution bulletin, Hydrogeology Journal, Water Soil and Air Pollution, Hydrological Process , Geofluids Applied Geochemistry, Journal of Geochemical Exploration etc., He has also published five books and wrote several chapters in books of national and international repute. He was a Post doc fellow under STA Japan program,, UGC Russian academy of science program, CSIR, INSA, DST, etc., He was a member of editorial board in Indian journal of marine sciences and is a referee for many national and international journals.