Author(s): Amaral, Luyza Mayary ; Carolina de Almeida Castilho, Maria [UNESP] ; Henry, Raoul [UNESP] ; Ferragut, Carla
Date: 2020
Persistent ID: http://hdl.handle.net/11449/200320
Origin: Oasisbr
Subject(s): Algae; Benthic environment; Restoration processes; Tropical reservoir; Algae; Algae; Benthic environment; Benthic environment; Restoration processes; Restoration processes; Tropical reservoir; Tropical reservoir
Made available in DSpace on 2020-12-12T02:03:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-08-01
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Epipelon can contribute to the maintenance of shallow lake oligotrophication. Herein, we simulated oligotrophication by diluting eutrophic water and evaluated epipelon biomass and structure and potential relationships with phytoplankton and zooplankton communities. Dilutions of 25–75% negatively impacted phytoplankton biomass and zooplankton diversity and increased Rotifera density. Additionally, the 25% dilution increased Copepoda density, but had no effect on Cladocera. On both experimental days, epipelon chlorophyll-a and algal density responded to oligotrophication, but the algal biomass response was less pronounced after 14 days. Ceratium furcoides was dominant in the phytoplankton, while diatom species were dominant in the epipelon. We observed that experimental oligotrophication can influence both the biomass and taxonomic structure of the algal and zooplankton communities. Overall, we concluded that experimental oligotrophication negatively impacted the phytoplankton biomass and favored the development of the phototrophic epipelon; however, a large reduction in eutrophication (>50%) is required for a significant algal response in the benthic environment of a shallow tropical reservoir.
Epipelon can represent a potentially valuable tool for oligotrophication maintenance in shallow tropical lakes and reservoirs.
Programa de Pós-graduação em Biodiversidade Vegetal e Meio Ambiente Instituto de Botânica, Av. Miguel Stéfano, 3687, Água Funda, CEP
Núcleo de Pesquisa em Ecologia Instituto de Botânica, Av. Miguel Stéfano, 3687, Água Funda, CEP
Departamento de Zoologia Instituto de Biociências Campus de Botucatu Universidade Estadual Paulista - UNESP, Rubião Júnior, CEP
Departamento de Zoologia Instituto de Biociências Campus de Botucatu Universidade Estadual Paulista - UNESP, Rubião Júnior, CEP
FAPESP: 2017/50341-0
