Epipelon biomass responses to different restoration techniques in a eutrophic environment

Autor(es)

Costa, Renata Aparecida ; Ferragut, Carla

• Tipo de documento: Artigo Científico
• Fonte: Environmental Management; v. 72, n. 3, p. 14-pg., 2023-03-24.

Resumo

Eutrophication is a worldwide problem. In eutrophic lakes, phosphorus release from stored sediment hinders restoration processes. The epipelon is a community that grows attached to the sediment surface and has the potential to help phosphorus retention by autotrophic organisms. This study evaluated epipelon responses to four lake restoration techniques. The responses of abiotic variables and phytoplankton biomass were also evaluated. Four simultaneous mesocosm experiments were performed in a shallow eutrophic lake. The applied techniques were aeration, flocculant, floating macrophytes, and periphyton bioreactor. Water and epipelon samples were taken on days 3, 10, 17, 27, and 60. The aeration treatment and macrophytes decreased light availability in the epipelon, which had a predominance of heterotrophic components. Flocculant and periphyton bioreactor treatments favored epipelon growth with a higher contribution of autotrophic components. Therefore, some techniques may favor the epipelon growth, while others may harm the community, resulting in less efficient restoration processes. For the complete restoration of a lacustrine ecosystem, the choice of techniques to be applied must consider the restoration and maintenance of the benthic environment. (AU)

• Processo FAPESP: 18/26686-0 - Avaliação das respostas do fitoplâncton e do epipélon submetidos a diferentes de técnicas de restauração de ecossistemas eutróficos
• Beneficiário: Renata Aparecida Costa
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/50341-0 - Desafios para conservação da biodiversidade frente às mudanças climáticas, poluição e uso e ocupação do solo (PDIp)
• Beneficiário: Luiz Mauro Barbosa
• Modalidade de apoio: Auxílio à Pesquisa - Programa Modernização de Institutos Estaduais de Pesquisa