* Invited
2008. *Mayorga, E. Freshwater (bio)-geochemical and water quality data: Local and global data integration, technologies, and trends. Stroud Water Research Center, Avondale, PA, 9 Jun.
2006. Mayorga, E. Snohomish County surface water fee assessment: A system for routine data entry, query, and analysis integrating GIS and a relational database. Wash. URISA GIS Conference, Tacoma, WA, 9-11 May.
2005. Mayorga, E. and Britsch, S. Automation and integration of drainage outfall monitoring data for assessing NPDES water quality compliance. Wash. URISA GIS Conference, Seattle, 9-11 May.
2004. Aufdenkampe, A.K., E. Mayorga, A.V. Krusche, S. Alin and J.E. Richey. The need for accessible, flexible relational databases for river biogeochemistry data. LBA Science Meeting, Brasilia, Brazil, 27-29 July.
2007. *Mayorga, E., A. Aufdenkampe, C. Masiello, A. Krusche, P. Quay, J. Richey and S. Seitzinger. Rejuvenation and aging of carbon in rivers: Sources, exports and interactions among fractions in the Amazon and other systems. American Geophysical Union, San Francisco, CA, 10-15 Dec.
2007. Seitzinger, S., E. Mayorga, A. Beusen and others. Past, current and future trajectories of watershed nutrient sources, forms and exports: A Global NEWS application to the Millennium Ecosystem Assessment scenarios. American Geophysical Union, San Francisco, CA, 10-15 Dec.
2007. Mayorga, E., S. Seitzinger, A. Beusen, A. Bouwman, E. Dumont, J. Harrison, C. Kroeze, R. Lee and D. Wisser. Scenarios of Watershed Nutrient Sources, Forms and Exports: A Millennium Ecosystem Assessment "Global NEWS" Application. Estuarine Research Federation, Providence, RI, 4-8 Nov.
2007. Seitzinger, S., E. Mayorga, A. Beusen, A. Bouwman, E. Dumont, B. Fekete, J. Harrison, C. Kroeze, R. Lee, C. Vorosmarty and D. Wisser. Past, current and future trajectories of watershed nutrient sources, forms and exports: A Global NEWS application to the Millennium Ecosystem Assessment scenarios. INI International Nitrogen Conference, Brazil, 1-5 Oct.
2007. Aufdenkampe, A.K., E. Mayorga, P.J. Hernes and P.A. Bukavekas. Mineral complexation as a primary control on organic matter composition in large rivers. 3rd Int. Conference on Mechanisms of Organic Matter Stabilisation and Destabilisation in Soils and Sediments (SOM3), Australia, 23-26 Sept.
2005. Aufdenkampe, A.K., E. Mayorga, J.I. Hedges and others. From the Andes to the Atlantic: The evolution of organic matter in the Amazon River system. American Geophysical Union, New Orleans, LA, 23-27 May.
2005. Mayorga, E., A.K. Aufdenkampe, C.A. Masiello and others. Origin and cycling of dissolved inorganic carbon in the Amazonian river network: Isotopic perspective (13C and 14C) (In Spanish). Central American Water Resource Management Network (CARA) 2005 Congress, Managua, Nicaragua, 7-11 Mar.
2004. Mayorga, E., A.K. Aufdenkampe, A.V. Krusche, C.A. Masiello, P.D. Quay and J.E. Richey. 14C and 13C constraints on CO2 cycling in pristine and deforested lowland Amazonian rivers. American Geophysical Union, San Francisco, CA, 13-17 Dec.
2004. Aufdenkampe, A.K., E. Mayorga, A.V. Krusche, C.A. Masiello, J.I. Hedges, P.D. Quay and J.E. Richey. Isotopic constraints on organic and inorganic carbon cycling in the Amazon river system. LBA Science Meeting, Brasilia, Brazil, 27-29 Jul.
2004. Victoria, D.C., J.E. Richey, M. Costa-Cabral, A.V. Santiago, A.R. Pereira, E. Mayorga, R.L. Victoria and M.V.R. Ballester. Recent progress in modeling surface hydrology across the Amazon Basin using a Variable Infiltration Capacity approach. LBA Science Meeting, Brasilia, Brazil, 27-29 Jul.
2004. Richey, J.E., Aufdenkampe, A.K., Krusche, A.V. and E. Mayorga. ROMBUS: A model of DOM mobilization and reaction. Ocean Research Conference, American Society of Limnology and Oceanography, Honolulu, Hawaii, 15-20 Feb.
2002. Aufdenkampe, A.K., E. Mayorga, C.A. Masiello and others. Carbon dynamics within waters of the Amazon basin: Stable and radio-isotope constraints on sources of outgassed carbon. LBA Science Meeting, Manaus, Brazil, 7-10 Jul.
2002. Mayorga, E., A.K. Aufdenkampe, C.A. Masiello and others. DIC cycling from 14C and 13C isotopes in mountain and lowland rivers in the Amazon basin. Summer Meeting, American Society of Limnology and Oceanography, Victoria, British Columbia, Canada, 10-14 Jun.
2002. *Mayorga, E., A.K. Aufdenkampe and C.A. Masiello. Origin and transformation of carbon in the Amazonian fluvial network: An isotopic perspective from natural 13C and 14C (In Spanish). First Nicaraguan Biotechnology Conference, Managua, Nicaragua, 18-20 Apr.
2001. *Mayorga, E. The global carbon cycle: Principal components, greenhouse effect, terrestrial ecosystems, and the role of the tropics (In Spanish). Universidad Autónoma de Nicaragua, León, Nicaragua, 29 Aug.
1999. Mayorga, E., J.E. Richey and A. Aufdenkampe. Towards a mechanistic, remote-sensing driven model of organic matter cycling linking the land surface and river system in the Amazon basin. International Symposium on Hydrological and Geochemical Processes in Large Scale River Basins, Manaus, Brazil,15-19 Nov.
1998. Mayorga, E. and J.E. Richey. Patterns of water cycling and net primary production over the Amazon Basin: Model estimates from nine years of AVHRR-GAC measurements. Spring Meeting, American Geophysical Union, Boston, MA, 26-29 May.
2004. Mayorga, E. and A.K. Aufdenkampe. Modeling the linked carbon cycle between terrestrial ecosystems and the riverine systems draining them: Issues and challenges, focusing on the Amazon basin. Earth System Scholars Network Symposium, Adelphi, MD, 27-29 Sept.
2000. Mayorga, E. and J.E. Richey. Carbon cycling in the Amazon basin: Fine-resolution model estimates from eighteen years of AVHRR-GAC measurements. American Geophysical Union, San Francisco, CA, 15-19 Dec.
1999. Mayorga, E. Coupling land-surface and riverine water and carbon cycles in the Amazon Basin: Development of a multi-scale model driven by remote sensing observations. Gordon Conference on the Hydrology and Biogeochemistry of Forested Catchments, Andover, NH, 18-23 Jul.
1997. Mayorga, E. Basin-scale controls on organic carbon exports from mesoscale to large Amazonian rivers. Aquatic Sciences Meeting, American Society of Limnology and Oceanography, Santa Fe, NM, 10-14 Feb.