Title

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

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. 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, Animales bentónicos, Invertebrates, Invertebrados, Dams, Presas, Costa Rica--Puntarenas--Monteverde Zone, Costa Rica--Puntarenas--Zona de Monteverde, CIEE Fall 2004, CIEE Otoño 2004

Description

Student affiliation : Department of Evolutionary and Ecological Biology, University of Connecticut Born Digital

Subject: topical

Benthic animals; Animales bentónicos; Invertebrates; Invertebrados; Dams; Presas; CIEE Fall 2004; CIEE Otoño 2004

Subject: geographic

Costa Rica--Puntarenas--Monteverde Zone; Costa Rica--Puntarenas--Zona de Monteverde

Genre

Reports

Holding Location

Monteverde Institute MVI

Identifier

M39-00204

Recommended Citation

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