Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica
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Universidad Nacional, Costa Rica
2017
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Acceso en línea: | https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/9624 |
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UNICIENCIA96242019-08-27T15:42:49Z Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica Evaluación breve de la presencia de diatomeas y su relación con algunos parámetros físico-químicos en el río Pirro, Heredia, Costa Rica Flores-Stulzer, Eunice Villalobos-Sandí, Narcy Piedra-Castro, Lilliana Scholz, Carola Costa Rica Urban areas Wealth Composition Costa Rica zona urbana riqueza composición. The assessment of water quality in river ecosystems located in urban areas in the tropics based on the use of diatoms is scarce. This exploratory study aimed to establish the composition and species richness of diatoms in relation to physicochemical parameters as base element for monitoring the Pirro urban micro-watershed river in Heredia, Costa Rica. Materials were collected in the upper, middle, and lower river during dry, rainy, and transitional seasons. Dissolved oxygen, pH, conductivity, temperature, and composition diatomaceous were evaluated by scraping an area of 20 cm x 20 cm rocks. 18 diatom species with low abundance such as Navicula seminulum, N. minimum and N. cryptotenella were observed. These are indicatives of moderate conditions of pollution; others kinds, such as Nitzschia, display tolerant species to contaminants. The greatest diversity of species of diatoms occurred in the rainy season, and significant differences between sampling season and species richness were observed. In conclusion, Pirro river has poor sanitary conditions based on the presence of many different species, and the low channel of the river is the most affected by pollution. However, it is necessary to boost the information on this subject. La evaluación de la calidad de agua en ecosistemas fluviales en áreas urbanas en el trópico, basada en la utilización de diatomeas, es escasa. Este estudio exploratorio pretendió establecer la composición y riqueza de especies de diatomeas en relación con los parámetros físicos químicos como elemento base para un monitoreo de la microcuenca urbana del río Pirro, Heredia, Costa Rica. Los materiales se colectaron en la parte alta, media y baja del río durante la época seca, lluviosa y de transición. Se analizó el pH, el oxígeno disuelto, la conductividad, la temperatura y la composición de diatomeas raspando una superficie de 20 cm x 20 cm de rocas. Se observaron 18 especies de diatomeas con poca abundancia, con presencia de Navicula seminulum, N. minima y N. cryptotenella que son indicadoras de condiciones moderadas de contaminación y del género Nitzschia que presenta especies tolerantes a contaminantes. La mayor diversidad de especies de diatomeas ocurrió en la época lluviosa y se observaron diferencias significativas entre las épocas del muestreo y la riqueza de especies. Se concluye, con base en la presencia de especies, que el río Pirro presenta condiciones sanitarias malas y que el cauce bajo es el sitio más afectado por la contaminación. Pero es necesario aumentar la información en esta temática. Universidad Nacional, Costa Rica 2017-07-29 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Papers evaluated by academic peers Artículos evaluados por pares académicos application/pdf text/html https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/9624 10.15359/ru.31-2.7 Uniciencia; Vol. 31 No. 2 (2017): Uniciencia. Julio - Diciembre, 2017; 99-109 Uniciencia; Vol. 31 Núm. 2 (2017): Uniciencia. Julio - Diciembre, 2017; 99-109 Uniciencia; v. 31 n. 2 (2017): Uniciencia. Julio - Diciembre, 2017; 99-109 2215-3470 spa https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/9624/11412 https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/9624/11421 |
institution |
Universidad Nacional de Costa Rica |
collection |
Uniciencia |
language |
spa |
format |
Online |
author |
Flores-Stulzer, Eunice Villalobos-Sandí, Narcy Piedra-Castro, Lilliana Scholz, Carola |
spellingShingle |
Flores-Stulzer, Eunice Villalobos-Sandí, Narcy Piedra-Castro, Lilliana Scholz, Carola Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica |
author_facet |
Flores-Stulzer, Eunice Villalobos-Sandí, Narcy Piedra-Castro, Lilliana Scholz, Carola |
author_sort |
Flores-Stulzer, Eunice |
title |
Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica |
title_short |
Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica |
title_full |
Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica |
title_fullStr |
Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica |
title_full_unstemmed |
Brief Assessment of the Presence of Diatoms and Their Relationship with Some Physical and Chemical Parameters in the Pirro River, Heredia, Costa Rica |
title_sort |
brief assessment of the presence of diatoms and their relationship with some physical and chemical parameters in the pirro river, heredia, costa rica |
title_alt |
Evaluación breve de la presencia de diatomeas y su relación con algunos parámetros físico-químicos en el río Pirro, Heredia, Costa Rica |
publisher |
Universidad Nacional, Costa Rica |
publishDate |
2017 |
url |
https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/9624 |
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