Título principal
Avaliação dos efeitos de estressores globais e locais sobre bancos da grama marinha Halodule wrightii [recurso eletrônico] : uma abordagem mensurativa e experimental / Carlos Eduardo Peixoto Dias ; orientadora, Paulo Antunes Horta Junior, co-orientadora, Kalina Manabe Brauko.
Data de publicação
2024
Descrição física
59 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Ecologia, Florianópolis, 2024.
Inclui referências.
Avaliação dos efeitos de estressores globais e locais sobre bancos da grama marinha Halodule wrightii [recurso eletrônico] : uma abordagem mensurativa e experimental / Carlos Eduardo Peixoto Dias ; orientadora, Paulo Antunes Horta Junior, co-orientadora, Kalina Manabe Brauko.
Data de publicação
2024
Descrição física
59 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Ecologia, Florianópolis, 2024.
Inclui referências.
Assunto
Ecologia
Responsabilidade
Dias, Carlos Eduardo Peixoto
Junior, Paulo Antunes Horta
Universidade Federal de Santa Catarina. Programa de Pós-Graduação em Ecologia
Idioma
Português
Ecologia
Responsabilidade
Dias, Carlos Eduardo Peixoto
Junior, Paulo Antunes Horta
Universidade Federal de Santa Catarina. Programa de Pós-Graduação em Ecologia
Idioma
Português
Abstract: Coastal ecosystems, such as seagrass meadows, have been constantly affected by anthropogenic stressors on a global scale (e.g., marine heatwaves - MHWs) and a local scale (e.g., eutrophication). The aim of this research was to evaluate how these stressors affect Halodule wrightii seagrass beds. Biomass and shoot density data of H. wrightii, as well as abiotic parameters such as sediment granulometry and photosynthetically active radiation (PAR), were collected in a coastal lagoon in southern Brazil during two periods surrounding an acute eutrophic event. In addiction, a laboratory experiment was conducted to assess the effects of the stressors on seagrass and associated infauna by simulating a marine heatwave (MHW) and a eutrophic event, with treatments addressing the stressors acting individually and interactively. Our results showed the extinction of some meadows in the lagoon after the period of intense eutrophication, mainly in the southern portion, where all H. wrightii meadows were extinguished. In the laboratory experiment results, seagrass and associated infauna were significantly affected in treatments simulating a eutrophication process. In treatments simulating an MHW, H. wrightii and infauna were not significantly affected, however, high temperatures potentiated the effects of eutrophication in the combined stressor treatment, degrading seagrass physiological and morphological processes and affecting the abundance of associated infauna. This research highlighted the imminent impacts of MHWs and eutrophication on H. wrightii seagrass and associated infauna, emphasizing how stressors at multiple scales acting interactively affect coastal ecosystems and impact biodiversity constantly threatened by climate change and coastal pollution.