caa a22 4500 445890959 CHVBK 20180317145616.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10750-011-0645-0 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0645-0 High predation is of key importance for dominance of small-bodied zooplankton in warm shallow lakes: evidence from lakes, fish exclosures and surface sediments [Elektronische Daten] [Carlos Iglesias, Néstor Mazzeo, Mariana Meerhoff, Gissell Lacerot, Juan Clemente, Flavio Scasso, Carla Kruk, Guillermo Goyenola, Javier García-Alonso, Susanne Amsinck, Juan Paggi, Susana José de Paggi, Erik Jeppesen] The mean body size of limnetic cladocerans decreases from cold temperate to tropical regions, in both the northern and the southern hemisphere. This size shift has been attributed to both direct (e.g. physiological) or indirect (especially increased predation) impacts. To provide further information on the role of predation, we compiled results from several studies of subtropical Uruguayan lakes using three different approaches: (i) field observations from two lakes with contrasting fish abundance, Lakes Rivera and Rodó, (ii) fish exclusion experiments conducted in in-lake mesocosms in three lakes, and (iii) analyses of the Daphnia egg bank in the surface sediment of eighteen lakes. When fish predation pressure was low due to fish kills in Lake Rivera, large-bodied Daphnia appeared. In contrast, small-sized cladocerans were abundant in Lake Rodó, which exhibited a typical high abundance of fish. Likewise, relatively large cladocerans (e.g. Daphnia and Simocephalus) appeared in fishless mesocosms after only 2weeks, most likely hatched from resting egg banks stored in the surface sediment, but their abundance declined again after fish stocking. Moreover, field studies showed that 9 out of 18 Uruguayan shallow lakes had resting eggs of Daphnia in their surface sediment despite that this genus was only recorded in three of the lakes in summer water samples, indicating that Daphnia might be able to build up populations at low risk of predation. Our results show that medium and large-sized zooplankton can occur in subtropical lakes when fish predation is removed. The evidence provided here collectively confirms the hypothesis that predation, rather than high-temperature induced physiological constraints, is the key factor determining the dominance of small-sized zooplankton in warm lakes. Springer Science+Business Media B.V., 2011 Zooplankton community structure nationallicence Fish predation nationallicence Subtropical shallow lakes nationallicence Iglesias Carlos National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut Mazzeo Néstor Grupo de Ecología y Rehabilitación de Sistemas Acuáticos, Centro Universitario Regional Este-Facultad de Ciencias, Universidad de la República, Maldonado, Uruguay aut Meerhoff Mariana National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut Lacerot Gissell Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut Clemente Juan Grupo de Ecología y Rehabilitación de Sistemas Acuáticos, Centro Universitario Regional Este-Facultad de Ciencias, Universidad de la República, Maldonado, Uruguay aut Scasso Flavio Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut Kruk Carla Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut Goyenola Guillermo Grupo de Ecología y Rehabilitación de Sistemas Acuáticos, Centro Universitario Regional Este-Facultad de Ciencias, Universidad de la República, Maldonado, Uruguay aut García-Alonso Javier Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut Amsinck Susanne National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut Paggi Juan Instituto Nacional de Limnología-CONICET, Universidad Nacional del Litoral. Ciudad Universitaria. Paraje "El Pozo”, CP 3000, Santa Fé, Argentina aut José de Paggi Susana Instituto Nacional de Limnología-CONICET, Universidad Nacional del Litoral. Ciudad Universitaria. Paraje "El Pozo”, CP 3000, Santa Fé, Argentina aut Jeppesen Erik National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut Hydrobiologia Springer Netherlands 667/1(2011-06-01), 133-147 0018-8158 667:1<133 2011 667 10750 https://doi.org/10.1007/s10750-011-0645-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0645-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Iglesias Carlos National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut NATIONALLICENCE 700 1- Mazzeo Néstor Grupo de Ecología y Rehabilitación de Sistemas Acuáticos, Centro Universitario Regional Este-Facultad de Ciencias, Universidad de la República, Maldonado, Uruguay aut NATIONALLICENCE 700 1- Meerhoff Mariana National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut NATIONALLICENCE 700 1- Lacerot Gissell Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut NATIONALLICENCE 700 1- Clemente Juan Grupo de Ecología y Rehabilitación de Sistemas Acuáticos, Centro Universitario Regional Este-Facultad de Ciencias, Universidad de la República, Maldonado, Uruguay aut NATIONALLICENCE 700 1- Scasso Flavio Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut NATIONALLICENCE 700 1- Kruk Carla Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut NATIONALLICENCE 700 1- Goyenola Guillermo Grupo de Ecología y Rehabilitación de Sistemas Acuáticos, Centro Universitario Regional Este-Facultad de Ciencias, Universidad de la República, Maldonado, Uruguay aut NATIONALLICENCE 700 1- García-Alonso Javier Sección Limnología, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay aut NATIONALLICENCE 700 1- Amsinck Susanne National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut NATIONALLICENCE 700 1- Paggi Juan Instituto Nacional de Limnología-CONICET, Universidad Nacional del Litoral. Ciudad Universitaria. Paraje "El Pozo”, CP 3000, Santa Fé, Argentina aut NATIONALLICENCE 700 1- José de Paggi Susana Instituto Nacional de Limnología-CONICET, Universidad Nacional del Litoral. Ciudad Universitaria. Paraje "El Pozo”, CP 3000, Santa Fé, Argentina aut NATIONALLICENCE 700 1- Jeppesen Erik National Environmental Research Institute, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 667/1(2011-06-01), 133-147 0018-8158 667:1<133 2011 667 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer