Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidade Estadual de Maringá
2015
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| _version_ | 1876481619428114432 |
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| author | Natália Fernanda Santana |
| author_facet | Natália Fernanda Santana |
| contents | Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain Natália Fernanda Santana Thomaz Aurélio Pagioro Maria do Carmo Roberto Medicina Bacterium phosphorus energy resources River-floodplain systems are known for their heterogeneity of habitats and the hydrological pulse, the main driving force, which increases nutrient concentrations at the onset of the flood due to leaching from the littoral region and decomposition. This decaying organic matter tends to be deposited in the sediment, where occur biogeochemical processe s associated with microorganisms. This st udy aimed to characterize the vertical distribution of bacterial density in the sediment strata of six environments of the Upper Paraná River floodplain, checking similarity as for bacterial density and physical and chemical conditions. To this end, we analyzed the following factors: total phosphorus, total Kjeldahl nitrog en, levels of organic and in organic material, oxidation potential and particle size. The results evidenced a gradient of vertical distribution of bacterial density, with predominance of cocci, which possibly indicates no nutrient limitation in this limnic compartment. The analysis of variance was applied to determine significant differences between the layers of the sediment and environments. It can be observed a tendency of deposition of total-P and MI within the upper layers of all environments. More reducing potentials in the initial layers indicate a higher bacterial activity, since this region possesses a greater availability of most easily decomposable material. 2015 artículo científico 1679-9291 https://www.redalyc.org/articulo.oa?id=307239651008 en http://www.redalyc.org/revista.oa?id=3072 Acta Scientiarum. Health Sciences application/pdf Universidade Estadual de Maringá Acta Scientiarum. Health Sciences (Brasil) Num.1 Vol.37 |
| format | Artículo científico |
| id | redalyc_307239651008 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Universidade Estadual de Maringá |
| spellingShingle | Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain Natália Fernanda Santana Medicina Bacterium phosphorus energy resources Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain Natália Fernanda Santana Thomaz Aurélio Pagioro Maria do Carmo Roberto Medicina Bacterium phosphorus energy resources River-floodplain systems are known for their heterogeneity of habitats and the hydrological pulse, the main driving force, which increases nutrient concentrations at the onset of the flood due to leaching from the littoral region and decomposition. This decaying organic matter tends to be deposited in the sediment, where occur biogeochemical processe s associated with microorganisms. This st udy aimed to characterize the vertical distribution of bacterial density in the sediment strata of six environments of the Upper Paraná River floodplain, checking similarity as for bacterial density and physical and chemical conditions. To this end, we analyzed the following factors: total phosphorus, total Kjeldahl nitrog en, levels of organic and in organic material, oxidation potential and particle size. The results evidenced a gradient of vertical distribution of bacterial density, with predominance of cocci, which possibly indicates no nutrient limitation in this limnic compartment. The analysis of variance was applied to determine significant differences between the layers of the sediment and environments. It can be observed a tendency of deposition of total-P and MI within the upper layers of all environments. More reducing potentials in the initial layers indicate a higher bacterial activity, since this region possesses a greater availability of most easily decomposable material. 2015 artículo científico 1679-9291 https://www.redalyc.org/articulo.oa?id=307239651008 en http://www.redalyc.org/revista.oa?id=3072 Acta Scientiarum. Health Sciences application/pdf Universidade Estadual de Maringá Acta Scientiarum. Health Sciences (Brasil) Num.1 Vol.37 |
| title | Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
| topic | Medicina Bacterium phosphorus energy resources |
| url | https://www.redalyc.org/articulo.oa?id=307239651008 |