The cascade construction of artificial ponds as a tool for urban stream restoration - The use of benthic diatoms to assess the effects of restoration practices

The Science of the Total Environment
Joanna Żelazna-Wieczorek, Paulina Nowicka-Krawczyk

Abstract

A series of cascade artificial ponds were constructed to improve the ecological status of the stream. To evaluate the effects of restoration practices, a bioassessment, based on phytobenthic algae - the diatoms, was made. Hierarchical Cluster Analysis (HCA) and Principal Component Analysis (PCA) of diatom assemblages allowed for evaluating the influence of a series of cascade artificial ponds on stream integrity. To reveal which environmental factors had the greatest influence on shaping diatom assemblages, the BIO-ENV procedure was used, and in order to examine whether these factors had equal influence on diatoms along the stream, Redundancy Analysis (RDA) was used. The analysis of diatom assemblages allowed for the calculation of the diatom indices in order to assess the water quality and the ecological status of the stream. Artificial ponds constructed on the stream had significant effects on the integrity of the stream ecosystem. Diatom assemblages characteristic of stream habitats were disrupted by the species from ponds. HCA and PCA revealed that the stream was clearly divided into three sections: ponds, stream parts under the influence of ponds, and stream parts isolated from ponds. The ponds thus altered stream environm...Continue Reading

References

Sep 24, 2011·Ecological Applications : a Publication of the Ecological Society of America·Emily S Bernhardt, Margaret A Palmer
Sep 24, 2011·Ecological Applications : a Publication of the Ecological Society of America·Christy R ViolinEmily S Bernhardt
Sep 24, 2011·Ecological Applications : a Publication of the Ecological Society of America·Pauliina LouhiTimo Muotka
Sep 24, 2011·Ecological Applications : a Publication of the Ecological Society of America·S C JähnigP Haase

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Citations

Apr 25, 2016·The Science of the Total Environment·C A ValeraF A L Pacheco
Nov 1, 2017·Environmental Science and Pollution Research International·Rong ZhuXuwei Deng

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