The impact of significant imput of fine sediment on benthic fauna at tributary junctions: a case study of the Bermejo-Paraguay River confluence, Argentina
- Blettler, Martin Cesar Maria
- Amsler, Mario Luis
- Ezcurra, Ines Delia
- Espínola, Luis Alberto
- Eberle Folmer, Eliana Gisel
- Paira, Aldo Raul
- Best, James L.
- Parsons, Daniel R.
- Drago, Edmundo Carlos E.
DOIAbstract
This study examines the morphological features, suspended sediment inputs and hydraulic conditions within a large river in association with ecological patterns before and after a tributary confluence. In order to examine these effects, the macroinvertebrate distributions from three reaches of the Paraguay and Bermejo Rivers (Paraguay–Argentina) are investigated. The Bermejo River is a tributary that supplies significant quantities of fine sediment to the Paraguay River, primarily in suspension. Two reaches were examined on the Paraguay River, upstream and downstream of the Bermejo River junction, with the third study reach located on the Bermejo River, upstream of the confluence with the Paraguay River. The results provide clear evidence th...
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