1. Preface

   • Luiz A. Martinelli
   • Robert W. Howarth

   OriginalPaper 07 April 2006 Pages: 1 - 2

2. Sources of reactive nitrogen affecting ecosystems in Latin America and the Caribbean: current trends and future perspectives

   • Luiz A. Martinelli
   • Robert W. Howarth
   • Alan Townsend

   OriginalPaper 06 April 2006 Pages: 3 - 24

3. A review of anthropogenic sources of nitrogen and their effects on Canadian aquatic ecosystems

   • David W. Schindler
   • Peter J. Dillon
   • Hans Schreier

   OriginalPaper 21 April 2006 Pages: 25 - 44

4. More is less: agricultural impacts on the N cycle in Argentina

   • Amy T. Austin
   • Gervasio Piñeiro
   • Marina Gonzalez-Polo

   OriginalPaper 21 April 2006 Pages: 45 - 60

5. Human activities changing the nitrogen cycle in Brazil

   • Solange Filoso
   • Luiz Antonio Martinelli
   • Frank Dentener

   OriginalPaper 31 May 2006 Pages: 61 - 89

6. Assessment of nitrogen flows into the Cuban landscape

   • Julio A. Baisre

   OriginalPaper 21 April 2006 Pages: 91 - 108

7. Urban influences on the nitrogen cycle in Puerto Rico

   • Jorge R. Ortiz-Zayas
   • Elvira Cuevas
   • William H. McDowell

   OriginalPaper 21 April 2006 Pages: 109 - 133

8. Nitrogen and phosphorus budgets for a tropical watershed impacted by agricultural land use: Guayas, Ecuador

   • Mercy J. Borbor-Cordova
   • Elizabeth W. Boyer
   • Charles A. Hall

   OriginalPaper 21 April 2006 Pages: 135 - 161

9. The influence of climate on average nitrogen export from large watersheds in the Northeastern United States

   • R.W. Howarth
   • D.P. Swaney
   • C. Goodale

   OriginalPaper 21 April 2006 Pages: 163 - 186

10. Coastal eutrophication assessment in the United States

    • Donald Scavia
    • Suzanne B. Bricker

    OriginalPaper 21 April 2006 Pages: 187 - 208

11. Nitrogen cycling in tropical and temperate savannas

    • M.M.C. Bustamante
    • E. Medina
    • D.C. Garcia-Montiel

    OriginalPaper 21 April 2006 Pages: 209 - 237

12. Nutrient–chlorophyll relationships in tropical–subtropical lakes: do temperate models fit?

    • Vera L.M. Huszar
    • Nina F. Caraco
    • Jonathan Cole

    OriginalPaper 21 April 2006 Pages: 239 - 250

13. The stable carbon and nitrogen isotopic composition of vegetation in tropical forests of the Amazon Basin, Brazil

    • Jean P. H. B. Ometto
    • James R. Ehleringer
    • Luiz A. Martinelli

    OriginalPaper 21 April 2006 Pages: 251 - 274