Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river

Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river

The altitudinal gradient and the hydrological dynamics affect the establishment and distribution of organisms in Andean rivers. Benthic macroinvertebrates, an essential component of lotic ecosystems, are useful to assess the influence of the altitudinal gradient and changes in environmental characteristics. We analyzed the effects of altitudinal gradient on benthic macroinvertebrates assemblages in the Chillón River (Lima, Perú), and tested two hypotheses: 1) taxa richness decreases with increasing altitude, while dominance increases, and 2) altitude is the primary driver of variation in community composition. We found 47 taxa, being the class Insecta (Arthropoda) the richest and the densest in both hydrological periods. Taxa richness had a negative linear relation with altitude, while dominance had a positive linear relation. The RDA showed that communities varied along the altitudinal gradient. Our results showed that altitude is the main driver of variation in taxa composition; however, more studies must be carried out to understand what factors are essential in organism’s distribution and how they operate in Andean lotic ecosystems.https://doi.org/10.25260/EA.20.30.1.0.995

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Main Authors: García-Ríos, Raúl F., Moi, Dieison A., Peláez, Oscar E.
Format: Digital revista
Language:eng
Published: Asociación Argentina de Ecología 2020
Online Access:https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/995
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spelling rev-ecoaus-article-9952023-11-03T01:50:43Z Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river Efectos del gradiente altitudinal sobre las comunidades de macroinvertebrados bentónicos en dos períodos hidrológicos en un río altoandino neotropical García-Ríos, Raúl F. Moi, Dieison A. Peláez, Oscar E. The altitudinal gradient and the hydrological dynamics affect the establishment and distribution of organisms in Andean rivers. Benthic macroinvertebrates, an essential component of lotic ecosystems, are useful to assess the influence of the altitudinal gradient and changes in environmental characteristics. We analyzed the effects of altitudinal gradient on benthic macroinvertebrates assemblages in the Chillón River (Lima, Perú), and tested two hypotheses: 1) taxa richness decreases with increasing altitude, while dominance increases, and 2) altitude is the primary driver of variation in community composition. We found 47 taxa, being the class Insecta (Arthropoda) the richest and the densest in both hydrological periods. Taxa richness had a negative linear relation with altitude, while dominance had a positive linear relation. The RDA showed that communities varied along the altitudinal gradient. Our results showed that altitude is the main driver of variation in taxa composition; however, more studies must be carried out to understand what factors are essential in organism’s distribution and how they operate in Andean lotic ecosystems.https://doi.org/10.25260/EA.20.30.1.0.995 El gradiente altitudinal y la dinámica hidrológica afectan el establecimiento y la distribución de organismos en los ríos altoandinos. Los macroinvertebrados bentónicos, un componente esencial en los ecosistemas lóticos, son útiles para evaluar la influencia del gradiente altitudinal y los cambios en las características ambientales. Analizamos los efectos del gradiente altitudinal sobre las comunidades de macroinvertebrados bentónicos del Río Chillón (Lima, Perú) y pusimos a prueba dos hipótesis: 1) la riqueza de taxones disminuye con el aumento de la altitud, mientras que la dominancia aumenta, y 2) la altitud es el factor principal de la variación en la composición de la comunidad. Registramos 47 taxones, siendo la clase Insecta (Arthropoda) el más diverso y con alta densidad en ambos períodos hidrológicos. La riqueza de taxones tuvo una relación lineal negativa con la altitud, mientras que la dominancia mostró una relación lineal positiva. El análisis de redundancia evidenció que las comunidades bentónicas variaron a lo largo del gradiente altitudinal. Nuestros resultados muestran que la altitud es el principal conductor de la variación en la composición de taxones; sin embargo, sería necesario realizar más estudios para dilucidar qué factores son esenciales en la distribución de organismos y como operan en ecosistemas lóticos andinos.https://doi.org/10.25260/EA.20.30.1.0.995 Asociación Argentina de Ecología 2020-03-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articles Artículos application/pdf application/pdf application/vnd.openxmlformats-officedocument.wordprocessingml.document https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/995 10.25260/EA.20.30.1.0.995 Ecología Austral; Vol. 30 No. 1 (2020): April 2020. Pages 001-165; 033-044 Ecología Austral; Vol. 30 Núm. 1 (2020): April 2020. Pages 001-165; 033-044 1667-782X 0327-5477 eng https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/995/425 https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/995/426 https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/995/550 Derechos de autor 2020 Raúl F. García-Ríos, Dieison A. Moi, Oscar E. Peláez https://creativecommons.org/licenses/by/3.0/
institution AUSTRAL
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country Argentina
countrycode AR
component Revista
access En linea
databasecode rev-ecoaus
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region America del Sur
libraryname Asociación Argentina de Ecología
language eng
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author García-Ríos, Raúl F.
Moi, Dieison A.
Peláez, Oscar E.
spellingShingle García-Ríos, Raúl F.
Moi, Dieison A.
Peláez, Oscar E.
Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river
author_facet García-Ríos, Raúl F.
Moi, Dieison A.
Peláez, Oscar E.
author_sort García-Ríos, Raúl F.
title Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river
title_short Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river
title_full Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river
title_fullStr Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river
title_full_unstemmed Effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a Neotropical Andean river
title_sort effects of altitudinal gradient on benthic macroinvertebrate assemblages in two hydrological periods in a neotropical andean river
description The altitudinal gradient and the hydrological dynamics affect the establishment and distribution of organisms in Andean rivers. Benthic macroinvertebrates, an essential component of lotic ecosystems, are useful to assess the influence of the altitudinal gradient and changes in environmental characteristics. We analyzed the effects of altitudinal gradient on benthic macroinvertebrates assemblages in the Chillón River (Lima, Perú), and tested two hypotheses: 1) taxa richness decreases with increasing altitude, while dominance increases, and 2) altitude is the primary driver of variation in community composition. We found 47 taxa, being the class Insecta (Arthropoda) the richest and the densest in both hydrological periods. Taxa richness had a negative linear relation with altitude, while dominance had a positive linear relation. The RDA showed that communities varied along the altitudinal gradient. Our results showed that altitude is the main driver of variation in taxa composition; however, more studies must be carried out to understand what factors are essential in organism’s distribution and how they operate in Andean lotic ecosystems.https://doi.org/10.25260/EA.20.30.1.0.995
publisher Asociación Argentina de Ecología
publishDate 2020
url https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/995
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