Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina)
The Salar de Olaroz, located in the Argentine Puna, is one of the largest lithium deposits of the world. Lithium extraction requires large amounts of fresh and brackish water, creating pressure on wetlands of these desert environments. The knowledge of the aquatic fauna of the area is of interest to monitor impacts of these extractive activities. In this work, a study of the Chironomidae (Diptera) prior to mining is carried out in order to understand the structure of the Chironomidae assemblage at morphospecies level, with the aim of evaluating its spatial and seasonal variation, relating changes in the assemblage to some environmental variables. Quantitative biological samples and environmental variables of interest were taken and registered in three streams during four season in three consecutive years (2013-2015). Our results show that the Chironomidae assemblage could respond to variables related with discharge by decreasing its richness. Some morphotypes (e.g., Podonomus, Parametriocnemus, Limnophyes and Polypedilum) associated with changes in pH, decreases in dissolved oxygen and water velocity, and increases of finer sediments could disappear from the area.
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Asociación Argentina de Ecología
2022
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rev-ecoaus-article-19022023-11-02T15:26:52Z Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina) Diversidad de Chironomidae (Diptera) en ambientes extremos (Salar de Olaroz, Desierto de Puna, Argentina) Torrejon, Silvia E. Pereyra, Laura Vargas, Nelly Molineri, Carlos non-biting midges high altitude benthic community Salar de Olaroz mosquitos que no pican gran altitud comunidad bentónica Salar de Olaroz The Salar de Olaroz, located in the Argentine Puna, is one of the largest lithium deposits of the world. Lithium extraction requires large amounts of fresh and brackish water, creating pressure on wetlands of these desert environments. The knowledge of the aquatic fauna of the area is of interest to monitor impacts of these extractive activities. In this work, a study of the Chironomidae (Diptera) prior to mining is carried out in order to understand the structure of the Chironomidae assemblage at morphospecies level, with the aim of evaluating its spatial and seasonal variation, relating changes in the assemblage to some environmental variables. Quantitative biological samples and environmental variables of interest were taken and registered in three streams during four season in three consecutive years (2013-2015). Our results show that the Chironomidae assemblage could respond to variables related with discharge by decreasing its richness. Some morphotypes (e.g., Podonomus, Parametriocnemus, Limnophyes and Polypedilum) associated with changes in pH, decreases in dissolved oxygen and water velocity, and increases of finer sediments could disappear from the area. El Salar de Olaroz, ubicado en la Puna Argentina, es uno de los depósitos de litio más grandes del mundo. La extracción de este elemento requiere grandes cantidades de agua dulce y salobre, lo cual presiona sobre los humedales de estos ambientes desérticos. Conocer la fauna acuática de la zona es de interés para monitorear los impactos de estas actividades extractivas. En este trabajo se realiza un estudio de los Chironomidae (Diptera) previo a la explotación minera, para determinar la estructura del ensamblaje de Chironomidae a nivel de morfoespecies, a fin de evaluar su variación espacial y estacional, relacionando cambios en el ensamblaje con algunas variables ambientales. Se tomaron y registraron muestras biológicas cuantitativas y variables ambientales relevantes, en tres arroyos durante tres años consecutivos (2013-2015), incluyendo cuatro temporadas cada año. Nuestros resultados muestran que el ensamble de Chironomidae podría responder a cambios en variables relacionadas con el caudal, disminuyendo su riqueza. Algunos morfotipos (e.g., Podonomus, Parametriocnemus, Limnophyes y Polypedilum) asociados con cambios en el pH, disminuciones en el oxígeno disuelto y la velocidad del agua, y aumentos de los sedimentos finos, podrían desaparecer del área. Asociación Argentina de Ecología 2022-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículos application/pdf application/pdf https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1902 10.25260/EA.22.32.3.0.1902 Ecología Austral; Vol. 32 No. 3 (2022): December 2022. Pages 821-1149; 1029-1038 Ecología Austral; Vol. 32 Núm. 3 (2022): December 2022. Pages 821-1149; 1029-1038 0327-5477 1667-7838 eng https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1902/1325 https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1902/1326 Derechos de autor 2022 Silvia E. Torrejon, Laura Pereyra, Nelly Vargas, Carlos Molineri https://creativecommons.org/licenses/by/3.0/ |
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Asociación Argentina de Ecología |
| language |
eng |
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Digital |
| author |
Torrejon, Silvia E. Pereyra, Laura Vargas, Nelly Molineri, Carlos |
| spellingShingle |
Torrejon, Silvia E. Pereyra, Laura Vargas, Nelly Molineri, Carlos Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina) |
| author_facet |
Torrejon, Silvia E. Pereyra, Laura Vargas, Nelly Molineri, Carlos |
| author_sort |
Torrejon, Silvia E. |
| title |
Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina) |
| title_short |
Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina) |
| title_full |
Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina) |
| title_fullStr |
Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina) |
| title_full_unstemmed |
Chironomidae (Diptera) diversity in extreme environments (Salar de Olaroz, Puna Desert, Argentina) |
| title_sort |
chironomidae (diptera) diversity in extreme environments (salar de olaroz, puna desert, argentina) |
| description |
The Salar de Olaroz, located in the Argentine Puna, is one of the largest lithium deposits of the world. Lithium extraction requires large amounts of fresh and brackish water, creating pressure on wetlands of these desert environments. The knowledge of the aquatic fauna of the area is of interest to monitor impacts of these extractive activities. In this work, a study of the Chironomidae (Diptera) prior to mining is carried out in order to understand the structure of the Chironomidae assemblage at morphospecies level, with the aim of evaluating its spatial and seasonal variation, relating changes in the assemblage to some environmental variables. Quantitative biological samples and environmental variables of interest were taken and registered in three streams during four season in three consecutive years (2013-2015). Our results show that the Chironomidae assemblage could respond to variables related with discharge by decreasing its richness. Some morphotypes (e.g., Podonomus, Parametriocnemus, Limnophyes and Polypedilum) associated with changes in pH, decreases in dissolved oxygen and water velocity, and increases of finer sediments could disappear from the area. |
| publisher |
Asociación Argentina de Ecología |
| publishDate |
2022 |
| url |
https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1902 |
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