Sampling sites plotted on the Amazon basin map, Amazonas State: 1 Japurá River, Japurá city 2 Juruá River, Juruá city 3 Negro River, Santa Isabel do Rio Negro city 4 Purus River, Tapauá city 5 Cuieiras River, Manaus city 6 Manaus city, urban área: Federal University of Amazonas’s campus (UFAM) and Isaac Sabá Oil Refinery) 7 Aripuanã River, Novo Aripuanã city 8 Uatumã River, Presidente Figueiredo city 9 Jatapú River, São Sebastião do Uatumã city; Pará State: 10 Trombetas River, Oriximiná city 11 Tapajós River, Aveiro and Santarém cities 12 Jari River, Almeirim city; Rondônia State: 13 Madeira River, Porto Velho city. Geographic coordinates at the Table 1.