Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

El uso de macroinvertebrados como indicadores de calidad del agua a lo largo de dos Corrientes en un paisaje alterado en Cañitas, Costa Rica

Creator

Emily Thorpe

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Publication Date

August 2010

Abstract

Human alteration of natural landscapes often has significant impacts on nearby aquatic ecosystems, affecting both abiotic and biotic factors. Water quality testing has primarily depended on the monitoring of abiotic factors; however, the use of biotic indicators has emerged as a valuable tool. This study looks at the water quality of two joined streams in Cañitas, Costa Rica, a region dominated by coffee and dairy production. The abiotic indicators measured included dissolved oxygen, temperature, nitrogen, phosphorous, pH, and turbidity. Macroinvertebrates were sampled as the biotic indicators. Principal Components Analysis was used to determine the similarity between sites. Based on BMWP’-CR scores, one site had bad, very contaminated water quality; six sites had bad quality contaminated water; and three sites had water with regular quality, eutrophic, medium contamination. There were no significant correlations between the biotic and abiotic indicators of water quality. BMWP’-CR scores were significantly correlated with S and H’; indicating that as S and H’ increased, so did BMWP’-CR. This study indicates that human alteration of natural landscapes is likely affecting aquatic ecosystems and the macroinvertebrates that inhabit them; however, because there are no correlations between biotic and abiotic factors, it cannot conclude how exactly these alterations are affecting them. La alteración humana de los paisajes naturales a menudo tiene un impacto significativo sobre los ecosistemas acuáticos cercanos, afectando tanto los factores abióticos y bióticos. Pruebas de calidad del agua ha dependido principalmente en el seguimiento de los factores abióticos, sin embargo, el uso de indicadores bióticos se ha convertido en una herramienta valiosa. Este estudio analiza la calidad del agua de dos corrientes se unieron en Cañitas, Costa Rica, una región dominada por el café y la producción de leche. Los indicadores abióticos medidos incluyen oxígeno disuelto, temperatura, nitrógeno, fósforo, pH y turbidez. Se tomaron muestras de macroinvertebrados como indicadores bióticos. Análisis de Componentes Principales se utilizó para determinar la similitud entre los sitios. Sobre la base de las puntuaciones BMWP'-CR, tenía un sitio de mala calidad, muy contaminado el agua, seis centros contaban con mala calidad del agua contaminada, y tres sitios tenían el agua con una calidad regular, eutróficos, la contaminación del medio. No hubo correlaciones significativas entre los indicadores bióticos y abióticos de la calidad del agua. CR-BMWP' resultados se correlacionaron significativamente con S y H ', lo que indica que como S y H' aumenta, también aumenta BMWP'-CR. Este estudio indica que las alteraciones humanas de los paisajes naturales es probable que afectan a los ecosistemas acuáticos y los macroinvertebrados que habitan en ellos, sin embargo, porque no hay correlaciones entre los factores bióticos y abióticos, que no se puede concluir exactamente cómo estas alteraciones son las mismas.

Keywords

Invertebrates, Aquatic organisms--Effect of water pollution on, Costa Rica--Puntarenas--Monteverde Zone, Costa Rica--Guanacaste--Canitas, Invertebrados, Organismos acuáticos--Efecto de la contaminación del agua en, Costa Rica--Puntarenas--Zona de Monteverde, Tropical Ecology Summer 2010, Ecología Tropical Verano 2010, Reports

Description

Text in English. Born Digital

Subject: topical

Invertebrates; Aquatic organisms--Effect of water pollution on; Costa Rica--Puntarenas--Monteverde Zone; Costa Rica--Guanacaste--Canitas; Invertebrados; Organismos acuáticos--Efecto de la contaminación del agua en; Costa Rica--Puntarenas--Zona de Monteverde; Costa Rica--Guanacaste--Canitas; Tropical Ecology Summer 2010; Ecología Tropical Verano 2010

Genre

Reports

Holding Location

University of South Florida USF

Identifier

M39-00226

The use of macroinvertebrates as water quality indicators along two streams in a disturbed landscape in Cañitas, Costa Rica

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