Marcos Callisto is a full Professor of Ecology at the Departamento de Genetica, Ecologia e Evolucao, Universidade Federal de Minas Gerais. He received hisPh.D, from the Universidade Federal do Rio de Janeiro, Brazil. Callisto's research interests include ecology of headwater streams, freshwater biodiversity conservation, leaf litter decomposition, biomonitoring, environmental education, and ecological assessment. Callisto is on an Editorial Board for a renowned journal, has published over 100 papers in international journals, 46 book chapters and has been an editor on five books. Andrea C. Encalada is a full Professor in the Department of Life & Environmental Sciences, BIOSFERA Institute, Universidad San Francisco de Quit. Encalada received her undergraduate Biology degree from Potificia Universidad Catolica del Ecuador, and later her Ph.D. on Freshwater Ecology from Cornell University in Ithaca, NY. Since 2007, Encalada is a visiting scientist at the Universidade de Coimbra, Portugal, and since 2016 she is an Adjunct Professor at the University of North Carolina, Chapel Hill. Encalada's research interests include aquatic insects life history, tropical stream ecology, leaf litter decomposition, climate change, biomonitoring, and Andean-Amazon rivers.. Encalada is an editor on two journals, has published 60 papers, and authored two books. Manuel A.S. Graca is a full Professor of Ecology at the Department of Life Sciences, University of Coimbra, Portugal. He received his Ph.D. from the University of Sheffield, U.K. Since 2003, he is a visiting scientist at the Universidade Federal de Minas Gerais, BH, Brazil. His research interests include leaf litter decomposition, stream ecology, and biomonitoring. Graca is an editor on three journals, has published 134 paper in international journals, authored one book and edited two others. Douglas Rodriguez Olarte is a full Professor of Ecology at the Department of Biology, Agronomy Faculty, Universidad Centro Occidental Lisandro Alvarado. He received his Ph.D. from the University Complutense of Madrid, Spain. His research interests include biogeography, integrity, biomonitoring and conservation of freshwater fishes and rivers, and fish and aquatic ecology. Olarte has published 35 paper in international journals and authored one book, edited another, and has contributed to 25 book chapters. Jose Ivan Mojica is a full Professor at the Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogota. He has an Undergraduate Biology degree from Pontificia Universidad Javieriana, Bogota, and aPh.D. from the Universidad Complutense de Madrid, Spain. His research interest include biodiversity of neotropical fresh water fishes, Amazon, Orinoco and Magdalena rivers fish ecology, Amazon stream ecology, biogeography, and conservation of neotropical freshwater fishes and rivers. Mojica has published 25 paper in international journals and authored seven books. Franco Teixeira de Mello is a Professor of Ecology and Environmental Management at the Department of Ecology and Environmental Management, Centro Universitario Regional del Este, Universidad de la Republica, Uruguay. He received his Ph.D. fromthe Universidad de la Republica, Uruguay. His research interests include stream ecology, fresh water fishes, biomonitoring, and leaf litter decomposition. Teixeira de Mello is an editor on three journals, published 54 paper in international journals, authored two books, edited another, and has contributed to 17 book chapters.