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“Perfiles” (ISSN printed 1390-5740 - Electronic ISSN 2477-9105) is a scientific research journal published by the Science Faculty of “Escuela Superior Politécnica de Chimborazo” (Riobamba, Ecuador). It is being published following a biannual periodicity [(January - June) and (July- December)]. Its mission is to disseminate scientific-technological information related to predominant knowledge areas and related branches studied in the institution.

The main objective of the journal is the publication of original or review articles, short communications, technical reports, standards, specifications, letters to the editor, communications to congresses and, in short, other contents which are relevant to the scientific community.

“Perfiles” is a free access research journal. Its online version is available at the web address:
http://ceaa.espoch.edu.ec:8080/revista.perfiles/.
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Issue Nº 25 Vol.1 - [January - June 2021]

CONTENT

AUTHORS: Patricio Méndez*, Blanca Alvarez, Nahomy Jaramillo, Johanna Japa

Abstract
The study and development of environmental laws that systematize the management of water bodies requires the identification of bioindicators to establish their ecological status. Therefore, this study aims to determine the macroinvertebrates diversity as bioindicators of Yuquipa river water quality. Three monitoring stations were studied on November, December 2020 and on January 2021; macroinvertebrates species were gathered and the Shannon index was used to measure species diversity, which expresses the uniformity of importance values across all species. Furthermore, the family biotic index was used to determine the water quality, as it ascribes different tolerance values and considers the taxonomic level. Two location groups were recognised: the first PY-2 and PY-3 was rated as excellent water quality (3.26 and 3.12) respectively, with a mean diversity (2.45 and 2.54), while the PY-1 site was rated as regular water quality (5.34) with a mean diversity of 2.36. The result was that diversity and water quality were not affected by anthropogenic activities.
Keywords: Biotic index, fluvial habitat, pollution, equity, abundance, water quality

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