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Search on : UMANA-VILLALOBOS, GERARDO [Author]
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 Umaña-Villalobos, Gerardo and Avilés-Vargas, Lidia Plankton variation in Río Cuarto Lake, Costa Rica (2013-2017). Rev. biol. trop, Dic 2019, vol.67, no.6, p.1543-1559. ISSN 0034-7744


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 Céspedes-Vargas, Edwin, Umaña-Villalobos, Gerardo and Silva-Benavides, Ana Margarita Tolerancia de diez especies de diatomeas (Bacillariophyceae) a los factores físico-químicos del agua en el Río Sarapiquí, Costa Rica. Rev. biol. trop, Mar 2016, vol.64, no.1, p.105-115. ISSN 0034-7744


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 Chaves-Ulloa, Ramsa, Umaña-Villalobos, Gerardo and Springer, Monika Downstream effects of hydropower production on aquatic macroinvertebrate assemblages in two rivers in Costa Rica. Rev. biol. trop, Abr 2014, vol.62, suppl.2, p.179-201. ISSN 0034-7744


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 Umaña-Villalobos, Gerardo. Phytoplankton variability in Lake Fraijanes, Costa Rica, in response to local weather variation. Rev. biol. trop, Aug 2014, vol.62, no.2, p.483-494. ISSN 0034-7744


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 Umaña-Villalobos, Gerardo. Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica. Rev. biol. trop, Dec 2010, vol.58, no.4, p.1405-1419. ISSN 0034-7744


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