Diez años de monitoreo limnológico de un lago natural modificado en los trópicos: el lago Cote, Costa Rica

by Gerardo Umaña
Published 2014-08-01

Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica

by Gerardo Umaña-Villalobos
Published 2010-12-01

Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica

by Gerardo Umaña-Villalobos
Published 2010-12-01

Phytoplankton variability in Lake Fraijanes, Costa Rica, in response to local weather variation

by Gerardo Umaña-Villalobos
Published 2014-08-01

Distribution of Agonostomus monticola and Brycon behreae in the Río Grande de Térraba, Costa Rica and relations with water flow

by Thiago Cotta Ribeiro, Gerardo Umaña Villalobos

Downstream effects of hydropower production on aquatic macroinvertebrate assemblages in two rivers in Costa Rica

by Ramsa Chaves-Ulloa, Gerardo Umaña-Villalobos, Monika Springer
Published 2014-04-01

Basic limnology of fifty-one lakes in Costa Rica

by Kurt A. Haberyan, Sally P. Horn, Gerardo Umaña V.
Published 2003-03-01

Macroinvertebrados dulceacuícolas de la Isla del Coco, Costa Rica: especies y comparación con otras islas del Pacífico Tropical Oriental Freshwater macroinvertebrates from Cocos Is...

by Pablo E. Gutiérrez-Fonseca, Alonso Ramírez, Gerardo Umaña, Monika Springer
Published 2013-06-01

Macroinvertebrados dulceacuícolas de la Isla del Coco, Costa Rica: especies y comparación con otras islas del Pacífico Tropical Oriental

by Pablo E. Gutiérrez-Fonseca, Alonso Ramírez, Gerardo Umaña, Monika Springer
Published 2013-06-01