Nitrogen Cycling In Latin America and : Drivers, Impacts And Vulnerabilities

Monday, 14 December 2015: 11:50
2008 (Moscone West)
Jean Pierre Ometto1, Mercedes Bustamante2, Maria Cristina Forti1, Tibisay Peres3, Ariel F Stein4, Victor Jaramillo5, Cecilia Perez6, Patricia FERNANDA Pinho7, Nataly Ascarrunz8, Amy Austin9, Luiz Antonio Martinelli10 and Nnet Project Team, (1)INPE National Institute for Space Research, Sao Jose dos Campos, Brazil, (2)Universidade de Brasilia, Brasilia, Brazil, (3)Instituto Venezolano de Investigaciones Cientificas, Caracas, Venezuela, (4)NOAA College Park, College Park, MD, United States, (5)Universidad Nacional Autónoma de México, Morelia, Mexico, (6)Universidad de Chile, Santiago, Chile, (7)USP University of Sao Paulo, São Paulo, Brazil, (8)Instituto Boliviano de Investigación Forestal, Santa Cruz de la Sierra, Bolivia, (9)University of Buenos Aires, IFEVA-CONICET, Buenos Aires, Argentina, (10)Universidade de Sao Paulo, Piracicaba, Brazil
Latin America is at a crossroads where a balance should be found between production of the major agricultural commodities, reasonable and planned urbanization and conservation of its natural ecosystems and associated goods and services. Most of the natural biological fixation of the globe occurs in forests of Latin America. On the other hand, Latin America has one of the highest rate of deforestation in the world, and one of the highest increases in the use of nitrogen fertilizers. A better understanding of the responses of the N cycle to human impacts will allow better conservation of biodiversity and natural resources, with an improvement in food security and more effective land use choices in biofuel development. Latin America is a unique region in multiple aspects, and particularly relevant for this proposal are the broad climatic gradient and economic patterns that include a diverse range of natural ecosystems and socio-economic development pathways. Additionally, the region is impaired by the lack of information on actual impacts of human activity on N cycling across this diverse range of ecosystems. Finally, the large expanse of tropical ecosystems and reservoirs of biodiversity juxtaposed with an intense economic incentive for development make our understanding of human impacts in this context particularly important for global change research in the region. An evaluation of current and predicted changes in climate and land use on nitrogen stocks and fluxes in the region what is being develop by the Nnet network (Nitrogen Cycling In Latin America: Drivers, Impacts And Vulnerabilities ). This presentation will bring the latest results of this integrative initiative in Latin America, focusing on the nitrogen budget associated to provision of ecosystem services and climate change.