Ecologic implications at a large junction of highly unequal discharges and sediment loads

M. L. Amsler, M. C.M. Blettler, I. Ezcurra De Drago, J. L. Best

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper examines changes in the benthic fauna along the Paraguay River (Paraguay- Argentina), up- and downstream its confluence with the Bermejo River (Argentina), which supplies large inputs of suspended fine sediment to the Paraguay River, mostly in suspension. Biotic (benthic invertebrates) and abiotic data at several cross-sections along the Paraguay River and in the Bermejo River clearly show how the significant loading of sediment changes drastically the abundance and richness of the benthic assemblage of the Paraguay River with effects still discernible up to 70 km downstream the junction. While there is no evidence of increasing sediment loads of the Bermejo River due to anthropogenic impacts, this case illustrates how human influences on sediment yield could be conveyed through confluences, thereby affecting the ecology of large river ecosystems.

Original languageEnglish (US)
Title of host publicationRiver Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016
EditorsGeorge Constantinescu, Marcelo Garcia, Dan Hanes
PublisherCRC Press/Balkema
Pages1709-1716
Number of pages8
ISBN (Print)9781138029132
DOIs
StatePublished - Jan 1 2016
EventInternational Conference on Fluvial Hydraulics, RIVER FLOW 2016 - St. Louis, United States
Duration: Jul 11 2016Jul 14 2016

Publication series

NameRiver Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016

Other

OtherInternational Conference on Fluvial Hydraulics, RIVER FLOW 2016
CountryUnited States
CitySt. Louis
Period7/11/167/14/16

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Amsler, M. L., Blettler, M. C. M., Ezcurra De Drago, I., & Best, J. L. (2016). Ecologic implications at a large junction of highly unequal discharges and sediment loads. In G. Constantinescu, M. Garcia, & D. Hanes (Eds.), River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016 (pp. 1709-1716). (River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016). CRC Press/Balkema. https://doi.org/10.1201/9781315644479-266