Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Comunidades de macroinvertebrados y sustratos del cauce de una Quebrada en Monteverde, Costa Rica



Download Full Text (71 KB)

Publication Date

November 2004


The purpose of this study was to determine how the dam placed in the Quebrada Máquina, Monteverde, Costa Rica, affects the abundance, richness, and diversity of benthic macroinvertebrate communities. Samples were collected from 20 sites, 50m upstream and downstream of the dam. The relative percentage of streambed substrate composition was also documented at all test sites. There were significant decreases in Order richness and diversity as absolute distance from the dam decreased. In addition, the substrate composition was found to be homogeneous for sand directly upstream of the dam. This leads to the conclusion that the dam has created a buildup of sand, thereby decreasing richness and diversity, by means of destroying suitable habitat.


El propósito de este proyecto fue estudiar como el dique en la Quebrada Maquina, en Monteverde, Costa Rica, afecta la abundancia, la riqueza y la diversidad de los macroinvertebrados bénticos. Se colectaron muestras en 20 lugares 50 m arriba y debajo del dique. Los sustratos de los lugares fueron documentados. Se encontraron reducciones significativas en la riqueza y la diversidad conforme la distancia absoluta del dique decrecía. Además, la composición de los sustratos fue homogénea para la arena inmediatamente arriba del dique. Esto lleva a la conclusión de que el dique crea una acumulación de arena, que disminuye la riqueza y la diversidad, destruyendo así el hábitat disponible.


Benthic animals, Invertebrates, Dams, CIEE Fall 2004

Palabras claves

Animales bentónicos, Invertebrados, Presas, CIEE Otoño 2004

Geographic Location

Monteverde (Puntarenas, Costa Rica)

Holding Location

Monteverde Institute


Digital Only


For more information or full text, please contact the partners at the Monteverde Institute.





Macroinvertebrate communities and streambed substrates of a dammed stream in Monteverde, Costa Rica, November 2004



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.