The Lower Paraguay river-floodplain habitats in the context of the Fluvial Hydrosystem Approach

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2008
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Drago, Edmundo C.
Wantzen, Karl M.
Paira, Aldo R.
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We report herein the first description of the physical structure of the aquatic habitats of the Lower Paraguay River along 390 km from Asunción city (Paraguay) to the confluence with the Paraná River. The hierarchical ordination of the Fluvial Hydrosystem Approach (FHA) allowed us to classify the Lower Paraguay as a meandering functional sector where five functional sets were identified: (a) main channel, (b) floodplain channel, (c) floodplain lentic environment, (d) tributary, and (f) aquatic-terrestrial transition zone. These functional sets encompassed twenty one functional units and sixty one major mesohabitats. We attribute the riverine habitat diversity to the changes in the channel-floodplain morphology and in the strength, duration and frequency of their hydrological connectivity. The variable river-floodplain- tributary complex developed several types of fluvial-lacustrine boundaries and riverine ecotones.

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570 Biowissenschaften, Biologie
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Large river, physical habitat, connectivity, boundaries, ecotones
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ISO 690DRAGO, Edmundo C., Karl M. WANTZEN, Aldo R. PAIRA, 2008. The Lower Paraguay river-floodplain habitats in the context of the Fluvial Hydrosystem Approach. In: Ecohydrology & Hydrobiology. 2008, 8(1), pp. 125-142. ISSN 1642-3593. Available under: doi: 10.2478/v10104-009-0004-1
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@article{Drago2008Lower-8735,
  year={2008},
  doi={10.2478/v10104-009-0004-1},
  title={The Lower Paraguay river-floodplain habitats in the context of the Fluvial Hydrosystem Approach},
  number={1},
  volume={8},
  issn={1642-3593},
  journal={Ecohydrology & Hydrobiology},
  pages={125--142},
  author={Drago, Edmundo C. and Wantzen, Karl M. and Paira, Aldo R.}
}
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    <dcterms:abstract xml:lang="eng">We report herein the first description of the physical structure of the aquatic habitats of the Lower Paraguay River along 390 km from Asunción city (Paraguay) to the confluence with the Paraná River. The hierarchical ordination of the Fluvial Hydrosystem Approach (FHA) allowed us to classify the Lower Paraguay as a meandering functional sector where five functional sets were identified: (a) main channel, (b) floodplain channel, (c) floodplain lentic environment, (d) tributary, and (f) aquatic-terrestrial transition zone. These functional sets encompassed twenty one functional units and sixty one major mesohabitats. We attribute the riverine habitat diversity to the changes in the channel-floodplain morphology and in the strength, duration and frequency of their hydrological connectivity. The variable river-floodplain- tributary complex developed several types of fluvial-lacustrine boundaries and riverine ecotones.</dcterms:abstract>
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