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

Alternative Title

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

Creator

John Robert Rancourt

Files

Publication Date

November 2004

Abstract

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.

Resumen

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.

Keywords

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

Format

Digital Only

Notes

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

Identifier

M39-00204

Type

Book

Recommended Citation

Rancourt, John Robert, "Macroinvertebrate communities and streambed substrates of a dammed stream in Monteverde, Costa Rica, November 2004" (2004). Monteverde Institute: Tropical Ecology and Conservation. 390.
https://digitalcommons.usf.edu/tropical_ecology/390