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| Format: | Artículo científico |
| Sprache: | en |
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Universidade Estadual de Maringá
2014
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=187129844009 |
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Inhaltsangabe:
- Periphytic diatom as bioindicators in urban and rural stream Carina Moresco Liliana Rodrigues Biología Keywords nutrients periphyton human impact Bacillariophyta Periphytic diatoms were sampled from two streams, one located in an urban area and the other located in a rural area, in Maringá, State of Pa raná, Brazil. In addition to temporal variability, differences in the assemblage structure between stre ams were evaluated and correlated with physical and chemical characteristics. Six samples of periphytic diatoms we re collected from each stream from July 2007 to June 2008. The streams differed in abiotic factors and in relation to the structure of di atom assemblages and the spatial scale was more important than the temporal scale (ANOVA, p ≥ 0.05; non-metric multidimensional scaling (NMS ) stress = 13.73, p = 0.009). The Procrustes analysis (m 2 = 0.7607 and p = 0.0001) showed that variables with the greatest influenc e on the assemblage structure of diatoms were total nitrogen (TN), electrical conductivity, dissolved oxygen (DO), chemical oxygen demand (COD), biochemical oxygen demand (BOD 5 ) and flow. These results indicate that abiotic variables modified by the land-use had greater influence on the community structure of diatoms than seasonal changes in abiotic variables. 2014 artículo científico 1679-9283 https://www.redalyc.org/articulo.oa?id=187129844009 en http://www.redalyc.org/revista.oa?id=1871 Acta Scientiarum. Biological Sciences application/pdf Universidade Estadual de Maringá Acta Scientiarum. Biological Sciences (Brasil) Num.1 Vol.36