FN Archimer Export Format PT J TI Bacterioplankton Activity in a Meso-eutrophic Subtropical Coastal Lagoon BT AF Schmitz Fontes, Maria L. Fernandes, Heloísa Brandão, Manoela Hennemann, Mariana Coutinho Aparecida Loss, Raquel de Souza Grinevicius, Valdelúcia Maria Alves Tonetta, Denise Cesca, Karina Hessel Silveira, Mônica Bedin, Mara Recouvreux, Derce Vasconcellos Antônio, Regina AS 1:1,2;2:3;3:1;4:1;5:4;6:5;7:1;8:4;9:1;10:1;11:4;12:6; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:; C1 Departamento de Ecologia e Zoologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Trindade, 88040-970 Florianópolis, SC, Brazil PPGOCEANO, Departamento de Geociências, Centro de Filosofia e Ciências Humanas, Universidade Federal de Santa Catarina, Trindade, 88040-970 Florianópolis, SC, Brazil Departamento de Engenharia Sanitária, Centro Tecnológico, Universidade Federal de Santa Catarina, Trindade, 88040-970 Florianópolis, SC, Brazil Departamento de Engenharia Química e Engenharia de Alimentos, Centro Tecnológico, Universidade Federal de Santa Catarina, Trindade, 88040-970 Florianópolis, SC, Brazil Departamento deBioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Trindade, 88040-970 Florianópolis, SC, Brazil Campus Araranguá, Universidade Federal de Santa Catarina, Trindade, 88000-000 Araranguá, SC, Brazil C2 UNIV FED SANTA CATARINA, BRAZIL UNIV FED SANTA CATARINA, BRAZIL UNIV FED SANTA CATARINA, BRAZIL UNIV FED SANTA CATARINA, BRAZIL UNIV FED SANTA CATARINA, BRAZIL UNIV FED SANTA CATARINA, BRAZIL TC 0 UR https://archimer.ifremer.fr/doc/00597/70922/69162.pdf LA English DT Article AB The aim of this study was to investigate whether the bacterioplankton activity in the meso-eutrophic Conceição Lagoon would increase significantly under allochthonous inputs of inorganic nutrients and organic carbon. Abundance and biomass of bacterioplankton were evaluated under three treatments: light (14 h light/10 h dark), complete darkness (dark-control), and nutrient (C + N + P—dark, 100 : 10 : 1) enrichments during 72 h. Nutrient enrichments promoted a significant increase in abundance (maximum of 19.0 ×109 cells·L−1 in the first 32 hours) and biomass of the heterotrophic bacterioplankton, which induced the formation of large clusters. Bacterial biomass remained constant in the non-enriched incubations (dark-control and light). Bacterial growth rates were significantly higher after nutrient additions (1.35 d−1), followed by control (0.79 d−1), and light (0.63 d−1) treatments, which were statistically equal (). Bacterial production rates were also significantly higher under nutrient additions (1.28 d−1), compared to the control and light (0.50 d−1 and 0.44 d−1, respectively), demonstrating that bacterial growth and production in this meso-eutrophic lagoon are under an immediate “bottom-up” regulation, followed by a potential top-down effect. These facts reinforce the urgency on improving the local wastewater management plan in order to prevent further expansion of anoxic waters. PY 2018 PD OCT SO International Journal of Microbiology SN 1687-918X PU Hindawi Limited VL 2018https://w3. IS 3209605 DI 10.1155/2018/3209605 ID 70922 ER EF