caa a22 4500 445892900 CHVBK 20180317145622.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10750-010-0565-4 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0565-4 Macroinvertebrate food web structure in a floodplain lake of the Bolivian Amazon [Elektronische Daten] [Carlos Molina, François-Marie Gibon, Thierry Oberdorff, Eduardo Dominguez, Julio Pinto, Rubén Marín, Marc Roulet] Two stable isotopes δ13C and δ15N were used to identify the energy sources and trophic relationships of the main freshwater macroinvertebrates in a floodplain lake of the Beni River (Bolivian Amazonia). Four energy sources (seston, bottom sediment, periphyton, and aquatic macrophytes) and macroinvertebrate communities were collected during three periods of the river hydrological cycle. Macroinvertebrates showed greater temporal variation in isotope values than their food sources. Six trophic chains were identified: four were based on seston, periphyton, C3 macrophytes, and bottom sediments, and the last two chains on a combination of two carbon sources. One mixed seston and periphyton sources during the wet season while the other mixed periphyton and macrophytes sources during the wet and dry seasons. Periphyton was the most important energy source supporting the highest number of trophic levels and consumers. The macrophytic contribution was only significant during the dry season. Bottom sediments constituted a marginal energy source. As each season is associated with different physical and chemical conditions, processes organizing macroinvertebrate food web structure in the Beni floodplain seem strongly linked to hydrological seasonality. Springer Science+Business Media B.V., 2010 Stable isotopes nationallicence Floodplain lake nationallicence Freshwater macroinvertebrates nationallicence Energy sources nationallicence Trophic chains nationallicence Molina Carlos Instituto de Ecología, Unidad de Limnología, UMSA, Casilla Postal #10077, La Paz, Bolivia aut Gibon François-Marie Institut de Recherche pour le Développement IRD, Casilla Postal #9214, La Paz, Bolivia aut Oberdorff Thierry UMR BOREA (IRD 207/CNRS 7208/MNHN/UPMC), Muséum National d'Histoire Naturelle, 61 rue Buffon, CP 53, #75231, Paris cedex 05, France aut Dominguez Eduardo CONICET—Instituto de Biología Neotropical (IBN), Facultad de Ciencias Naturales, Universidad Nacional de Tucumán, Miguel Lillo 205, 4000, Tucumán, Argentina aut Pinto Julio Instituto de Ecología, Unidad de Limnología, UMSA, Casilla Postal #10077, La Paz, Bolivia aut Marín Rubén Instituto de Ecología, Unidad de Limnología, UMSA, Casilla Postal #10077, La Paz, Bolivia aut Roulet Marc Institut de Recherche pour le Développement IRD, Casilla Postal #9214, La Paz, Bolivia aut Hydrobiologia Springer Netherlands 663/1(2011-03-01), 135-153 0018-8158 663:1<135 2011 663 10750 https://doi.org/10.1007/s10750-010-0565-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0565-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Molina Carlos Instituto de Ecología, Unidad de Limnología, UMSA, Casilla Postal #10077, La Paz, Bolivia aut NATIONALLICENCE 700 1- Gibon François-Marie Institut de Recherche pour le Développement IRD, Casilla Postal #9214, La Paz, Bolivia aut NATIONALLICENCE 700 1- Oberdorff Thierry UMR BOREA (IRD 207/CNRS 7208/MNHN/UPMC), Muséum National d'Histoire Naturelle, 61 rue Buffon, CP 53, #75231, Paris cedex 05, France aut NATIONALLICENCE 700 1- Dominguez Eduardo CONICET—Instituto de Biología Neotropical (IBN), Facultad de Ciencias Naturales, Universidad Nacional de Tucumán, Miguel Lillo 205, 4000, Tucumán, Argentina aut NATIONALLICENCE 700 1- Pinto Julio Instituto de Ecología, Unidad de Limnología, UMSA, Casilla Postal #10077, La Paz, Bolivia aut NATIONALLICENCE 700 1- Marín Rubén Instituto de Ecología, Unidad de Limnología, UMSA, Casilla Postal #10077, La Paz, Bolivia aut NATIONALLICENCE 700 1- Roulet Marc Institut de Recherche pour le Développement IRD, Casilla Postal #9214, La Paz, Bolivia aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 663/1(2011-03-01), 135-153 0018-8158 663:1<135 2011 663 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer