| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000373526 |
| ISSN: | 0001-3765 |
| Authors: | Bitencourt, Jose A.P1 Silva, Frederico Sobrinho2 Silva-Neto, Inacio D. da3 Crapez, Mirian A.C1 |
| Institutions: | 1Universidade Federal Fluminense, Instituto de Biologia, Niteroi, Rio de Janeiro. Brasil 2Universidade Federal do Rio de Janeiro, Instituto de Geociencias, Rio de Janeiro. Brasil 3Universidade Federal do Rio de Janeiro, Centro de Ciencias da Saude, Rio de Janeiro. Brasil |
| Year: | 2014 |
| Season: | Jun |
| Volumen: | 86 |
| Number: | 2 |
| Pages: | 745-754 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | Little is known about the role of protists and bacteria interactions during hydrocarbon biodegradation. This work focused on the effect of oil on protists from three different locations in Guanabara Bay and bacteria from Caulerpa racemosa (BCr), Dictyota menstrualis (BDm) and Laurencia obtusa (BLo) during a 96 h bioassay. Cryptomonadida (site 1, 2 and 3), Scuticociliatida (site 2) and Euplotes sp.1 and Euplotes sp.2 (site 3) appeared after incubation. The highest biomass observed in the controls was as follows: protist site 3 (6.0 µgC.cm–3, 96 h) compared to site 3 with oil (0.7 µgC.cm–3, 96 h); for bacteria, 8.6 µgC.cm–3 (BDm, 72 h) and 17.0 µgC.cm–3 (BCr with oil, 24 h). After treatment, the highest biomasses were as follows: protists at site 1 and BLo, 6.0 µgC.cm–3 (96 h), compared to site 1 and BLo with oil, 3.31 µgC.cm–3 (96 h); the bacterial biomass was 43.1 µgC.cm–3 at site 2 and BDm (96 h). At site 3 and BLo with oil, the biomass was 18.21 µgC.cm–3 (48 h). The highest biofilm proportions were observed from BCr 1.7 µm (96 h) and BLo with oil 1.8 µm (24 h). BCr, BLo and BDm enhanced biofilm size and reduced the capacity of protists to prey |
| Portuguese abstract | Pouco se sabe sobre o papel dos protistas e as interações bacterianas durante a biodegradação de hidrocarbonetos. Este trabalho se concentrou no efeito do óleo sobre protistas de três localidades diferentes na Baía de Guanabara e bactérias de Caulerpa racemosa (BCr), Dictyota menstrualis (BDm) e Laurencia obtusa (BLo) durante 96 h de bioensaio. Cryptomonadida (locais 1 , 2 e 3), Scuticociliatida (local 2) e Euplotes sp.1 e Euplotes sp.2 (local 3) apareceram após incubação. As biomassas mais elevadas observadas nos controles foram como se segue: protista local 3 (6,0 µgC.cm–3, 96 h) comparado com o local 3 com óleo (0,7 µgC.cm–3, 96 h); para as bactérias, 8,6 µgC.cm–3 (BDm, 72 h) e 17,0 µgC.cm–3 (BCr com óleo, 24 h). Após o tratamento, as maiores biomassas foram como se seguem: protistas no local 1 e BLo, 6,0 µgC.cm–3 (96 h), em comparação com o local 1 e BLo com óleo, 3,31 µgC.cm–3 (96 h), a biomassa bacteriana foi de 43,1 µgC.cm–3 no local 2 e BDm (96 h). No local 3 e BLo com óleo, a biomassa foi 18,21 µgC.cm–3 (48 h). As maiores proporções de biofilme foram observadas de 1,7 µm BCr (96 h) a 1,8 µm BLo com óleo (24 h). BCr, BLo e BDm aumentaram o tamanho do biofilme e reduziram a capacidade dos protistas predarem |
| Disciplines: | Biología |
| Keyword: | Bacterias, Ecología, Hidrocarburos, Petróleo, Biodegradación, Bacterias de vida libre, Biomasa |
| Keyword: | Biology, Bacteria, Ecology, Hydrocarbons, Petroleum, Biodegradation, Biomass, Free-living bacteria |
| Full text: | Texto completo (Ver HTML) |
