**7. Acknowledgements**

This research is part of the ROCA project (River-Ocean Continuum of the Amazon), funded by the Gordon and Betty Moore Foundation. The main collaborating institutions are the Center for Nuclear Energy in Agriculture - CENA / USP, the National Institute of Amazonian Research - INPA, the Museu Paraense Emilío Goeldi - MPEG, Federal University of Pará - UFPA and the Federal University of Amapá - UNIFAP (Postgraduate Program in Tropical Biodiversity / PPGBIO and the Laboratories of Simulation and Modeling, Chemistry and Environmental Sanitation / Undergraduate Program in Environmental Sciences). This study was supported by the National Research Council (CNPq/MCT – Productivity Fellowship (Process N. 305657/2009-7), and by the Institute of Scientific and Technologic Research of the Amapá State (NHMET & CPAC/IEPA) and by the Tropical Biodiversity Postgraduate Program (PPGBio) of the Federal University of Amapá (UNIFAP), Brazil; SUDAM Project - "Integrated Network Management for Monitoring and Environmental Dynamics Hydroclimatic State of Amapá"; REMAM II Project/FINEP/CNPq – Extremes Hydrometeorology and Climate Phenomena; and Project CENBAM-FINEP/CNPq/FAPEAM/UNIFAP - INCT "Center for Integrated Studies of Amazonian Biodiversity".
