| Reconnaissance of selected PPCP compounds in Costa Rican surface wáter AL Spongberg, JD Witter, j. Acuña, j. Vargas, M Murillo, G Umaña, ... Water Research 45, 6709-6717, 2011 | 263 | 2011 |
| Cladoceran body size and vulnerability to copepod predation ZM Gliwicz, G Umaña Limnology and Ocenography 39 (2), 419 - 428, 1994 | 94 | 1994 |
| Limnology in Costa Rica G Umaña, KA Haberyan, SP Horn Limnology in developing countries 2, 33-62, 1999 | 45 | 1999 |
| Basic limnology of fifty-one lakes in Costa Rica KA Haberyan, SP Horn, G Umaña V Revista de Biología Tropical 51 (1), 107-122, 2003 | 41 | 2003 |
| Observations on the plankton of some Costa Rican lakes KA Haberyan, GV Umaña, C Collado, SP Horn Hydrobiologia 312, 75-85, 1995 | 40 | 1995 |
| Characterization of some Golfo Dulce drainage basin rivers (Costa Rica) G Umaña Revista de Biología Tropical 46 (Supl. 6), 1-12, 1998 | 30 | 1998 |
| Downstream effects of hydropower production on aquatic macroinvertebrate assemblages in two rivers in Costa Rica R Chaves-Ulloa, G Umaña-Villalobos, M Springer Revista de biologia tropical 62, 179-201, 2014 | 23 | 2014 |
| Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica G Umaña Villalobos Revista de Biología Tropical 58 (4), 1405-1419, 2010 | 23 | 2010 |
| Variación ambiental en el Río Grande de Térraba y algunos de sus afluentes, Pacífico Sur de Costa Rica G Umaña-Villalobos, M Springer Revista de Biología Tropical 54 (Supl. 1), 265-272, 2006 | 23 | 2006 |
| Epilithic diatom assemblages in rivers draining into Golfo Dulce (Costa Rica) and their relationship to water chemistry, habitat characteristics and land use A Michels, G Umaña, U Raeder Archive fur Hydrobiologie 165 (2), 167-190, 2006 | 22 | 2006 |
| Water chemistry and trophic state of eigth lakes in Costa Rica JR Jones, K Lohman, G Umaña Internationale Vereinigung fur Theoretische und Angewandte Limnologie …, 1992 | 20 | 1992 |
| Asociación planctónica en el Embalse Arenal, Costa Rica G Umaña Villalobos, C Collado Revista de Biología Tropical 38 (2A), 311-321, 1990 | 20 | 1990 |
| The planktonic community of Laguna Hule, Costa Rica G Umaña Revista de biología tropical 41 (3A), 499-507, 1993 | 18 | 1993 |
| Macroinvertebrados dulceacuícolas de la Isla del Coco, Costa Rica: especies y comparación con otras islas del Pacífico Tropical Oriental PE Gutiérrez-Fonseca, A Ramírez, G Umaña, M Springer Revista de Biología Tropical 61 (2), 657-668, 2013 | 17 | 2013 |
| Tolerancia de diez especies de diatomeas (Bacillariophyceae) a los factores físico-químicos del agua en el Río Sarapiquí, Costa Rica E Céspedes-Vargas, G Umaña-Villalobos, AM Silva-Benavides Revista de Biología Tropical 64 (1), 105-115, 2016 | 16 | 2016 |
| Preliminary analysis of the fish species of Pacific Central American Mangrove Zancudo, Golfo Dulce, Costa Rica HJ Feutry, P, Hartmann, H Casbonnet, G Umaña Wetlands Ecology and Management, 2010 | 16 | 2010 |
| The basic limnology of a low altitude tropical crater lake: Laguna del Cerro Chato G Umaña Villalobos, C Jiménez Revista de Biología Tropical 43 (1-3), 131-138, 1995 | 15* | 1995 |
| An analysis of river fragmentation by dams and river dewatering in Costa Rica A Farah‐Pérez, G Umaña‐Villalobos, J Picado‐Barboza, EP Anderson River Research and Applications 36 (8), 1442-1448, 2020 | 14 | 2020 |
| Distribution of Agonostomus monticola and Brycon behreae in the Río Grande de Térraba, Costa Rica and relations with water flow TC Ribeiro, GU Villalobos Neotropical Ichthyology 8, 841-849, 2010 | 14 | 2010 |
| Invertebrados bentónicos del Lago Cote, Costa Rica JA Sibaja-Cordero, G Umaña-Villalobos Revista de Biología Tropical 56 (Supl. 4), 205-213, 2008 | 12 | 2008 |
Monika SpringerProfesora Catedrática, Escuela de Biología y CIMAR, Universidad de Costa RicaAdresse e-mail validée de ucr.ac.cr
