Large scale distribution of bacterial communities in the upper Paraná River floodplain

Brazilian Journal of Microbiology

Josiane Barros Chiaramonte²  Maria Do Carmo Roberto¹  Thomaz Aurélio Pagioro¹ 

[1] ,Universidade Estadual de Maringá Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais Maringá PR ,Brazil

关键词: bacterioplankton distribution;    floodplain;    fluorescent in situ hybridization;   

DOI  :  10.1590/S1517-83822014000400009

来源: SciELO

【 摘 要 】

A bacterial community has a central role in nutrient cycle in aquatic habitats. Therefore, it is important to analyze how this community is distributed throughout different locations. Thirty-six different sites in the upper Paraná River floodplain were surveyed to determine the influence of environmental variable in bacterial community composition. The sites are classified as rivers, channels, and floodplain lakes connected or unconnected to the main river channel. The bacterial community structure was analyzed by fluorescent in situ hybridization (FISH) technique, based on frequency of the main domains Bacteria and Archaea, and subdivisions of the phylum Proteobacteria (Alpha-proteobacteria, Beta-proteobacteria, Gamma-proteobacteria) and the Cytophaga-Flavobacterium cluster. It has been demonstrated that the bacterial community differed in density and frequency of the studied groups. And these differences responded to distinct characteristics of the three main rivers of the floodplain as well as to the classification of the environments found in this floodplain. We conclude that dissimilarities in the bacterial community structure are related to environmental heterogeneity, and the limnological variables that most predicted bacterial communities in the upper Paraná River floodplain was total and ammoniacal nitrogen, orthophosphate and chlorophyll-a.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License