Water quality analysis through aquatic macroinvertebrate sampling in theChorreras river, Veracruz parish, Pastaza canton, Pastaza province, Ecuador

Gabriela Estefanía Padilla Méndez; Adrián Marcelo Santos Díaz; Leo Maximiliano Rodríguez Badillo

doi:10.59410/PREPRINT-UEA-vAMB2324ep27-174

Preprint / Version 1

Water quality analysis through aquatic macroinvertebrate sampling in theChorreras river, Veracruz parish, Pastaza canton, Pastaza province, Ecuador

Authors

Gabriela Estefanía Padilla Méndez Universidad Estatal Amazónica https://orcid.org/0009-0003-9143-2625
Adrián Marcelo Santos Díaz Universidad Estatal Amazónica https://orcid.org/0009-0004-3744-6951
Leo Maximiliano Rodríguez Badillo Universidad Estatal Amazónica https://orcid.org/0009-0007-4301-7944

DOI:

https://doi.org/10.59410/PREPRINT-UEA-vAMB2324ep27-174

Keywords:

biological indices, diversity indices, red surber

Abstract

The study on the water quality of the Chorreras River in the Veracruz parish, Pastaza Canton, reveals significant findings regarding the lack of monitoring and assessment of the aquatic ecosystem in the region. The main objective of this research is to evaluate the water quality of the Chorreras River in the Veracruz parish, Pastaza Canton, and province, by calculating diversity and biological indices for the monitoring of benthic macroinvertebrates. The study methodology involved two phases: fieldwork and laboratory analysis. During the field phase, sampling was conducted at seven points along the Chorreras River using the Surber net method to collect benthic macroinvertebrates. In the second phase, the collected specimens were identified and analyzed in the laboratory using taxonomic identification keys and calculating biological indices such as BMWP/COL and EPT. A total of 168 individuals were identified at the seven sampling sites, corresponding to 3 classes, 9 orders, and 18 families. The results indicate that the water quality of the Chorreras River is acceptable according to the BMWP/COL index, although the EPT index suggests a regular quality, indicating slight contamination. Subtle differences in macroinvertebrate diversity were observed between the sampling points, attributable to the river's geography and the various land uses in its basin. The presence of arboreal vegetation correlates positively with macroinvertebrate diversity, while human intervention, such as livestock farming and fish farming, was associated with a decrease in diversity.

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References

Aguas Urbanas. (2018). Monitoreo biológico de calidad de agua. Aguas Urbanas Núcleo Interdisciplinario.

Arroyo, C., & Encalada, A. (2009). EVALUACIÓN DE LA CALIDAD DE AGUA A TRAVÉS DE MACROINVERTEBRADOS BENTÓNICOS E ÍNDICES

BIOLÓGICOS EN RÍOS TROPICALES EN BOSQUE DE NEBLINA MONTANO. Colegio de Ciencias Biológicas y Ambientales, USFQ.

Carrera, C., & Fierro, K. (2001). Manual de monitoreo. Los Macroinvertebrados Acuáticos como Indicadores de la Calidad del Agua. Ecociencia.

Congreso Nacional de Chile. (2016). Calidad del Agua . Biblioteca del Congreso Nacional de Chile / BCN.

Domínguez, E., & Fernández , H. (2009). Macroinvertebrados Bentónicos Sudamericanos. Sistemática y Biología. Tucumán: Fundación Miguel Lillo.

Ladrera, R. (2012). Los macroinvertebrados acuáticos como indicadores del estado ecológico de los ríos. Páginas de información Ambiental.

Manzo, V. (2005). Key to the South America genera of Elmidae (Insecta: Coleoptera) with distributional data. Studies on Neotropical Fauna and Environment.

Moreno, C. (2001). Métodos para medir la biodiversidad. Zaragoza: M&T–Manuales y Tesis SEA, vol. 1.

Pérez, A., Salazar, N., & Font, M. (2016). Guía de macroinvertebrados bentónicos de la provincia de Orellana. Gobierno Autónomo Descentralizado de la Provincia de Orellana (GADPO).

Pond, G., Bailey, J., Lowman, B., & Whitman, M. (2013). Calibration and validation of a regionally and seasonally stratified macroinvertebrate index for West Virginia wadeable streams. Environmental Monitoring and Assessment.

Roldan, G. (1996). Guía para el estudio de los macroinvertebrados acuáticos del Departamento de Antioquia. Bogotá, Bogotá, Colombia: Universidad de Antioquia.

Roldán, G., & Ramírez, J. J. (2008). Fundamentos de limnología neotropical. Medellín, Antioquia: Universidad de Antioquia.

Roldán, L. (2020). Bioindicadores: qué son, tipos y ejemplos. Ecología Verde.

Varela, L., & Ron, S. (2018). Geografía y clima del Ecuador. BIOWEB . Obtenido de https://bioweb.bio/fungiweb/GeografiaClima/

Youtopía. (2022). ¿Por qué Ecuador es uno de los países más biodiversos del planeta? Visión Amazónica.