Abstract
In lotic ecosystems, submerged aquatic vegetation has important effects on hydrodynamic and sediment processes. These effects depend on plant morphology and patch structure. This study aimed to test the effect of 2 aquatic plant species on flow and sediment characteristics. For this purpose we measured under natural conditions 3D velocity profiles and sediment characteristics along the main axis of one patch of each species. The 2 species presented contrasting effects on velocity, turbulence profiles and sediment characteristics: one species had significant effects on hydrodynamics and accumulation of fine sediment also further downstream of the patch, whereas the second one accumulated very fine sediment mainly in the upstream half of the patch. These results emphasize the role of plant morphology on hydrodynamics and sediment physic-chemical characteristics.
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Acknowledgments
This work was supported by the Research Executive Agency, through the 7th Framework Programme of the European Union, Support for Training and Career Development of Researchers (Marie Curie—FP7-PEOPLE-2012-ITN), which funded the Initial Training Network (ITN) HYTECH ‘Hydrodynamic Transport in Ecologically Critical Heterogeneous Interfaces’, No. 316546. We thank Félix Vallier and Thérèse Bastide for field and technical assistance and the CNR (Compagnie Nationale du Rhône) for access to field sites. This study was carried out under the aegis of the Rhône Basin Long-Term Environmental Research (ZABR, Zone Atelier Bassin du Rhône).
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Licci, S. et al. (2016). Effect of Aquatic Plant Patches on Flow and Sediment Characteristics: The Case of Callitriche platycarpa and Elodea nuttallii . In: Rowiński, P., Marion, A. (eds) Hydrodynamic and Mass Transport at Freshwater Aquatic Interfaces. GeoPlanet: Earth and Planetary Sciences. Springer, Cham. https://doi.org/10.1007/978-3-319-27750-9_11
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DOI: https://doi.org/10.1007/978-3-319-27750-9_11
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