1. Forest structure and carbon dynamics in Amazonian tropical rain forests Simone Vieira, Plinio B. De Camargo, Diogo Selhorst, Lucy Hutyra, Roseane da Silva, Jeff Chambers, I. Foster Brown, Niro Higuchi, Joaquim dos Santos, Steven Wofsy, Susan Trumbore, Luiz Martinelli

3. Size Class Distribution

4. Biomass Distribution

5. Daily mean diameter increment in mm day -1, ± 95% confidence interval, compared with mean precipitation accumulated (reported in mm day -1 ) measured for the three areas.

6. Daily mean diameter increment in mm day-1 by diameter class (10-29.9 cm, 30-49 cm and >50 cm).

7. Mean annual diameter growth increments observed using dendrometer bands in the three permanent plots. Negative growth rates indicate a decrease in tree diameters during the period of study.

8. Distribution of annual carbon accumulation in living vegetation among diameter classes for the years of measurement.

9. Conclusion: marked seasonal growth trees with diameter >50cm were more affected by seasons. the major accumulation C was in the smaller trees in forests experiencing a longer dry season. forests experiencing a longer dry-season have larger annual diameter growth increments for individual trees.