Chapter 1 Nιτρον — An etymology of nitrogen and other related words

Chapter 2 Contemporary and pre-industrial global reactive nitrogen budgets

Chapter 3 Nitrogen stable isotopic composition of leaves and soil: Tropical versus temperate forests

Chapter 4 The globalization of N deposition: ecosystem consequences in tropical environments

Chapter 5 A nitrogen budget for late-successional hillslope tabonuco forest, Puerto Rico

Chapter 7 Nitrogen yields from undisturbed watersheds in the Americas

Chapter 8 Nitrogen cycling and anthropogenic impact in the tropical interamerican seas

Chapter 9 Ecosystem constraints to symbiotic nitrogen fixers: a simple model and its implications

Chapter 10 Do top-down and bottom-up controls interact to exclude nitrogen-fixing cyanobacteria from the plankton of estuaries? An exploration with a simulation model

Chapter 11 The presence of nitrogen fixing legumes in terrestrial communities: Evolutionary vs ecological considerations

Chapter 12 Nitrogen limitation in dryland ecosystems: Responses to geographical and temporal variation in precipitation