Effect of abiotic variables on the hyporheic fauna of Dagua River, Colombia
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| Авторы: | , , , |
|---|---|
| Формат: | artículo original |
| Статус: | Versión publicada |
| Дата публикации: | 2022 |
| Описание: | The fauna from the subsurface sediments where groundwaters and surface waters are exchanged, called “hyporheic fauna”, fulfills important ecological functions in rivers, but has not been sufficiently studied in Colombia. Objective: To identify relationships between hyporheic invertebrates and physicochemical variables in the Dagua River, Colombia. Methods: In three field trips (October 2017 and December 2018) to five sites along the river basin, we drilled with the Karaman-Chappuis method (sediment, water, and invertebrates), and recorded granulometry and organic matter in sediments; and nutrients, ions, and metals in water. Results: The headwater stations had substrates with coarser sediments (gravel and stone), higher oxygen levels, and lower water temperature. Both richness and species diversity were higher at the headwater stations, dominated by Copepoda and Insecta, while the lower basin was dominated by Arachnida (Hydrachnidiae), Clitellata (Oligochaeta), and Nematoda. Conclusions: The distribution and abundance of the hyporheic fauna were principally influenced by changes in the granulometry of the hyporheic substrate and its content of organic matter |
| Страна: | Portal de Revistas UCR |
| Институт: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Язык: | Español |
| OAI Identifier: | oai:archivo.portal.ucr.ac.cr:article/49264 |
| Online-ссылка: | https://archivo.revistas.ucr.ac.cr/index.php/rbt/article/view/49264 |
| Ключевое слово: | estimadores de biodiversidad sedimento fino invertebrados hiporréicos agua hiporreica ecología de ríos hipórreos biodiversity estimators fine sediment hyporheic invertebrates hyporheic water river ecology hyporheos |