Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Scientiarum Biological Sciences |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22240 |
Resumo: | 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 processes associated with microorganisms. This study 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 nitrogen, levels of organic and inorganic 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. |
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Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplainbacteriumenergy resourcesphosphorusEcologia de BacterioplânctonRiver-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 processes associated with microorganisms. This study 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 nitrogen, levels of organic and inorganic 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. Universidade Estadual De Maringá2015-03-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2224010.4025/actascibiolsci.v37i1.22240Acta Scientiarum. Biological Sciences; Vol 37 No 1 (2015); 59-70Acta Scientiarum. Biological Sciences; v. 37 n. 1 (2015); 59-701807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMenghttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22240/pdf_38Santana, Natalia FernandaPagioro, Thomaz AurelioRoberto, Maria do Carmoinfo:eu-repo/semantics/openAccess2015-03-10T09:15:09Zoai:periodicos.uem.br/ojs:article/22240Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2015-03-10T09:15:09Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
title |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
spellingShingle |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain Santana, Natalia Fernanda bacterium energy resources phosphorus Ecologia de Bacterioplâncton |
title_short |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
title_full |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
title_fullStr |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
title_full_unstemmed |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
title_sort |
Relationship between bacterial density and abiotic factors at different sediment depths of lakes in the Upper Paraná River floodplain |
author |
Santana, Natalia Fernanda |
author_facet |
Santana, Natalia Fernanda Pagioro, Thomaz Aurelio Roberto, Maria do Carmo |
author_role |
author |
author2 |
Pagioro, Thomaz Aurelio Roberto, Maria do Carmo |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Santana, Natalia Fernanda Pagioro, Thomaz Aurelio Roberto, Maria do Carmo |
dc.subject.por.fl_str_mv |
bacterium energy resources phosphorus Ecologia de Bacterioplâncton |
topic |
bacterium energy resources phosphorus Ecologia de Bacterioplâncton |
description |
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 processes associated with microorganisms. This study 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 nitrogen, levels of organic and inorganic 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. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03-10 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22240 10.4025/actascibiolsci.v37i1.22240 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22240 |
identifier_str_mv |
10.4025/actascibiolsci.v37i1.22240 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22240/pdf_38 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Biological Sciences; Vol 37 No 1 (2015); 59-70 Acta Scientiarum. Biological Sciences; v. 37 n. 1 (2015); 59-70 1807-863X 1679-9283 reponame:Acta Scientiarum Biological Sciences instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum Biological Sciences |
collection |
Acta Scientiarum Biological Sciences |
repository.name.fl_str_mv |
Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
||actabiol@uem.br |
_version_ |
1799317395995623424 |