This book aims to serve as a centralized reference document for students and researchers interested in aspects of marine nitrogen fixation. Although nitrogen is a critical element in both terrestrial and aquatic productivity, and nitrogen fixation is a key process that balances losses due to denitrification in both environments, most resources on the subject focuses on the biochemistry and microbiology of such processes and the organisms involved in the terrestrial environment on symbiosis in terrestrial systems, or on largely ecological aspects in the marine environment. This book is intended to provide an overview of N2 fixation research for marine researchers, while providing a reference on marine research for researchers in other fields, including terrestrial N2 fixation.

This book bridges this knowledge gap for both specialists and non-experts, and provides an in-depth overview of the important aspects of nitrogen fixation as it relates to the marine environment. This resource will be useful for researchers in the specialized field, but also useful for scientists in other disciplines who are interested in the topic. It would provide a possible text for upper division classes or graduate seminars.

Chapter1: Nitrogen Fixation in the Marine Environment

Chapter2: Fundamentals of N₂ Fixation
Chapter3: History of Research on Marine N₂ Fixation
Chapter4: Microorganisms and Habitats
Chapter5: Measurements of Organism Abundances and Activities
Chapter6: Factors Controlling N₂ Fixation
Chapter7: Biogeography of N₂ Fixation in the Surface Ocean
Chapter8: N₂ Fixation in Ocean Basins
Chapter9: Marine N₂ Fixation, Global Change and the Future
Chapter10: Summary and Conclusions.