I The Importance of Carbon Sinks.- The Search for Carbon Sinks in the Tropics.- Why Understanding the Natural Sinks and Sources of CO2 is Important: A Policy Analysis Perspective.- II Effects of CO2 on Natural Systems.- The Impact of Rising CO2 on Ecosystem Production.- Field Measurements of CO2 Enhancement and Climate Change in Natural Vegetation.- Potential Effects of the Increase in Carbon Dioxide and Climate Change on the Dynamics of Vegetation.- III Managing Natural Sinks of CO2.- Effects of Forest Management on Soil Carbon Storage.- On Estimating Agriculture’s Net Contribution to Atmospheric Carbon.- Processes and Lands for Sequestering Carbon in the Tropical Forest Landscape.- Forestry Opportunities in the United States to Mitigate the Effects of Global Warming.- Should We Store Carbon in Trees?.- The Potential Role of Temperate Forests as Sinks for CO2 — Examples from the German Environmental Policy against Global Warming.- Estimating the Global Potential of Forest and Agroforest Management Practices to Sequester Carbon.- Forest Fertilization: Its Potential to Increase the CO2 Storage Capacity and to Alleviate the Decline of the Global Forests.- The Use of Halophytes to Sequester Carbon.- Carbon Sinks in Mangroves and Their Implications to Carbon Budget of Tropical Coastal Ecosystems.- Marine Algae as a CO2 Sink.- IV Modeling Carbon Fluxes.- The Response of Terrestrial C Storage to Climate Change: Modeling C Dynamics at Varying Temporal and Spatial Scales.- Changes in C Storage by Terrestrial Ecosystems: How C-N Interactions Restrict Responses to CO2 and Temperature.- Aspects of the Interaction between Vegetation and Soil under Global Change.- The Transient Response of Vegetation to Climate Change: A Potential Source of CO2 to the Atmosphere.- AGeographically-Based Ecosystem Model and Its Application to the Carbon Balance of the Luquillo Forest, Puerto Rico.- Potential of Marine Macroalgae as a Sink for CO2: Constraints from a 3-D General Circulation Model of the Global Ocean.- An Approach to Assessment of Management Impacts on Agricultural Soil Carbon.- V Natural Sinks of CO2 Workshop Summary — Technical Synthesis, Conclusions, Key Findings and Research Recommendations.- Natural Sinks of CO2: Technical Synthesis from the Palmas Del Mar Workshop.- Natural Sinks of CO2: Conclusions, Key Findings and Research Recommendations from the Palmas Del Mar Workshop.- List of Participants.- Author Index.