Chironomidae (Insecta: Diptera) in three high Andean tropical streams in Colombia: altitudinal and temporal changes
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| Autores: | , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2024 |
| Descripción: | Introduction: The Chironomidae Family is recognized for its great abundance and diversity in freshwater ecosystems around the world. However, the taxonomic knowledge of this family is limited, particularly in Colombia. Objectives: To estimate the abundance and diversity at the genus level of the Chironomidae Family and its spatiotemporal dynamics in three small streams, tributaries of the Combeima River in central Colombia. Methods: This study describes the taxonomic and ecological assessment of chironomid larvae present in three high Andean streams (Tolima, Colombia), named Las Perlas (PE), La Plata (PL), and Cay (CA). Between 2015–2016, six sampling campaigns were carried out in contrasting climatic periods, at nine sampling points (three per stream: upper, middle, and lower zones). The collections were made with Surber net in different substrates. Results: A total of 15 594 larvae were recorded, corresponding to three subfamilies and 20 genera. The most abundant subfamily was Orthocladiinae with 13 698 larvae (87.84 %), represented by Cricotopus (66.19 %), followed by Chironominae with 1 367 individuals (8.77 %) with Polypedilum (5.18 %), and Tanypodinae with 530 organisms (3.40 %) with Pentaneura (2.91 %). At the spatial level, the highest abundance was found in PL3 (lower part; 27.84 %), followed by CA2 (middle part; 20.47 %), and PE1 (upper part; 1.93 %). At a temporal level, the three streams presented the highest abundance during February 2016 (= 25.93 %; transition to rainy season), followed by November 2015 (= 20.59 %; low rains), and October 2015 (= 3.94 %; high rains). Conclusions: The results obtained allow expanding the taxonomic lists of this group of macroinvertebrates in high Andean areas (1419–2586 m), and the detailed characterization of the 20 chironomid genera recorded in the selected streams, which constitute relevant contributions for the recognition of these dipterans and their ecological role in the high Andean aquatic systems of Colombia. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/57730 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/57730 |
| Palabra clave: | Andes, aquatic macroinvertebrates, Chironomidae, climate variability, Colombia, Diptera, Neotropics. Andes, Chironomidae, Colombia, Dípteros, Macroinvertebrados acuáticos, Neotrópico, Variabilidad climática |