Tese

Carbon flux in the microbial epipelagic food chain in a meso-oligotrophic coastal ecosystem: Ubatuba-SP (2019)

• Authors:
  • Lima, Hevelim Serrão de
  • Brandini, Frederico Pereira (Orientador)
• Autor USP: LIMA, HEVELIM SERRÃO DE - IO
• Unidade: IO
• Sigla do Departamento: IOB
• Subjects: PICOPLÂNCTON; BIOMASSA; BACTÉRIAS; UBATUBA (SP)
• Language: Inglês
• Abstract: In meso-oligotrophic regions the food web is longer, and the primary Carbon biomass production comes from the photosynthesis of pico-autotrophic organisms. Heterotrophic bacteria also represent an important role in these food chain, where most of the energy flows within the steps of the microbial loop before it reaches higher trophic levels. This study investigated the main origin of organic carbon accumulated by the second trophic level. Mortality and growth rates were estimated using in situ microcosm incubations. Synechococcus and heterotrophic bacteria represented more than 40% of the microbial community. Dilution technique applied in three experiments conducted in Ubatuba. It was quantified grazing and growth rate of heterotrophic bacteria, pico- and nanoplankton. Heterotrophic bacteria grazing was 53.85 µgC.L-1 per day, 2.53 µgC.L-1 per day and 3.00 µgC.L-1. The autotrophic biomass of carbon grazed 2.26 µgC.L-1 per day for Synechococcus and 35.97 µgC.L-1 for picoeukaryotes in the second experiment. Synechococcus grazed biomass was 1.14 µgC.L-1 per day and Picoeukaryotes grazed biomass was 50.46 µgC.L-1. The results of the experiments showed the flux of Carbon from both heterotrophic and autotrophic bacteria to grazers of the second trophic level was not as important as the flux of Carbon from picoeukarytes to grazers.
• Imprenta:
  • Publisher place: São Paulo
  • Date published: 2019
• Data da defesa: 02.07.2019


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How to cite

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• ABNT

  LIMA, Hevelim Serrão de. Carbon flux in the microbial epipelagic food chain in a meso-oligotrophic coastal ecosystem: Ubatuba-SP. 2019. Dissertação (Mestrado) – Universidade de São Paulo, São Paulo, 2019. Disponível em: https://teses.usp.br/teses/disponiveis/21/21134/tde-30032020-110037/. Acesso em: 10 jan. 2026.

• APA

  Lima, H. S. de. (2019). Carbon flux in the microbial epipelagic food chain in a meso-oligotrophic coastal ecosystem: Ubatuba-SP (Dissertação (Mestrado). Universidade de São Paulo, São Paulo. Recuperado de https://teses.usp.br/teses/disponiveis/21/21134/tde-30032020-110037/

• NLM

  Lima HS de. Carbon flux in the microbial epipelagic food chain in a meso-oligotrophic coastal ecosystem: Ubatuba-SP [Internet]. 2019 ;[citado 2026 jan. 10 ] Available from: https://teses.usp.br/teses/disponiveis/21/21134/tde-30032020-110037/

• Vancouver

  Lima HS de. Carbon flux in the microbial epipelagic food chain in a meso-oligotrophic coastal ecosystem: Ubatuba-SP [Internet]. 2019 ;[citado 2026 jan. 10 ] Available from: https://teses.usp.br/teses/disponiveis/21/21134/tde-30032020-110037/

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