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Deceptive Ecological Status Of Urban Streams And Rivers—evidence From Diatom Indices

E. Szczepocka, Paulina Nowicka-Krawczyk, A. Kruk
Published 2018 · Biology

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Urbanization directly affects the ecological status of streams and rivers: Their beds and drainage basins are often heavily transformed and their habitat conditions disturbed. The aim of the study was to evaluate the extent of human impact in streams in the city of Łodź, Central Poland (~700,000 inhabitants), by pattern recognition analysis of benthic diatom assemblage samples using a Kohonen artificial neural network, principal component analysis, and indicator species analysis. The study also determined the ecological status of the streams using five diatom indices: Multimetric Diatom Index, Specific Pollution Sensitivity Index, Generic Diatom Index, Biological Diatom Index, and Trophic Diatom Index. The samples demonstrated considerable variation in ecological status. Examples of poor and bad ecological status were observed, clearly resulting from strong human pressure; however, good status and moderate status were also recorded, both at natural sites and, unexpectedly, those which were severely transformed, whose beds were covered with concrete and which were located downstream from combined sewer overflows. Such sites demonstrated high water conductivity of up to 1440 μS/cm, but this was accompanied by other more favorable conditions: The water flowed from upstream stretches enclosed in downtown underground canals with a fast current, low water temperature, and high average concentration of dissolved oxygen (approximately 10 mg/dm³). These conditions had a mitigating effect, shaping the diatom assemblages to a specific form with the highest species richness and the highest number of indicator taxa observed in the study. In summary, the hydromorphological transformation of streambeds may result in seemingly good ecological status at heavily degraded sites. Therefore, conclusions based on diatom‐based biomonitoring of urban streams and rivers should be drawn with caution.
This paper references
Self-organized formation of topographically correct feature maps
T. Kohonen (1982)
Etude de la qualité des eaux du bassin Artois-Picardie à l'aide des communautés de diatomées benthiques : application des indices diatomiques
M. Coste (1991)
M. Dufrêne (1997)
Artificial neural networks as a tool in ecological modelling, an introduction
S. Lek (1999)
Clustering of the self-organizing map
Juha Vesanto (2000)
Utilisation of non-supervised neural networks and principal component analysis to study fish assemblages
S. Brosse (2001)
Multivariate Analysis of Ecological Data using CANOCO
J. Lepš (2003)
Water quality assessment using diatom assemblages and advanced modelling techniques
M. Gevrey (2004)
Self-organized formation of topologically correct feature maps
T. Kohonen (2004)
The Pampean Diatom Index (IDP) for assessment of rivers and streams in Argentina
N. Gómez (2004)
The Trophic Diatom Index: a new index for monitoring eutrophication in rivers
M. Kelly (2004)
The urban stream syndrome: current knowledge and the search for a cure
C. J. Walsh (2005)
Application of a self-organizing map to select representative species in multivariate analysis: A case study determining diatom distribution patterns across France
Young-Seuk Park (2006)
Composition and structure of epilithic diatom assemblages on stones of different size in a small calcareous stream (S Poland)
Agata Z. Wojtal (2006)
A diatom-based index for the biological assessment of eastern Canadian rivers : an application of correspondence analysis (CA)
I. Lavoie (2006)
Assessment of ecological status in UK rivers using diatoms
Martyn Kelly (2007)
The use of benthic diatoms in estimating water quality of variously polluted rivers
E. Szczepocka (2009)
Assessment of heavy metal pollution in the urban stream sediments and its tributaries
K. Sekabira (2010)
River restoration, habitat heterogeneity and biodiversity: a failure of theory or practice?
M. Palmer (2010)
River restoration: the fuzzy logic of repairing reaches to reverse catchment scale degradation.
E. Bernhardt (2011)
Establishing expectations for pan-European diatom based ecological status assessments
M. Kelly (2012)
Factors influencing the diversity of cuckoo wasps (Hymenoptera: Chrysididae) in the post‐agriculture area of the Kampinos National Park, Poland
K. Szczepko (2013)
A review of the diatom research in the Gulf of Gdańsk and Vistula Lagoon (southern Baltic Sea)
M. Witak (2013)
Application of diatoms to assess the quality of the waters of the Baryczka stream, left-side tributary of the River San
T. Noga (2013)
The response of epilithic diatom assemblages to sewage pollution in mountain streams of the Czech Republic
Adéla Moravcová (2013)
Diatom indices in the biological assessment of the water quality based on the example of a small lowland river
E. Szczepocka (2014)
The application and testing of diatom-based indices of stream water quality in Chinhoyi Town, Zimbabwe
T. Bere (2014)
Diatoms as indicators of historical water quality: A comparison of samples taken in the Wemmershoek catchment (Western Province, South Africa) in 1960 and 2008
W. Harding (2014)
A review on the occurrence of micropollutants in the aquatic environment and their fate and removal during wastewater treatment.
Y. Luo (2014)
diatSOM: a R-package for diatom biotypology using self-organizing maps
M. Bottin (2014)
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.
J. Żelazna-Wieczorek (2015)
Biological methods used to assess surface water quality
N. Szczerbiñska (2015)
Assessment of water quality in urban streams based on larvae of Hydropsyche angustipennis (Insecta, Trichoptera)
M. Tszydel (2015)
Diatoms in the biological assessment of the ecological state of waters using the Czarna Staszowska River as an example
E. Szczepocka (2015)
Can Tolerant Diatom Taxa be Used for Effective Assessments of Human Pressure
E. Szczepocka (2015)
Diatoms as water quality indicators in the upper reaches of the Great Fish River, Eastern Cape, South Africa
M. Holmes (2015)
Long term urban impacts on the ecological status of a lowland river as determined by diatom indices
E. Szczepocka (2016)
Larvae of Hydropsyche angustipennis (Trichoptera, Hydropsychidae) as indicators of stream contamination by heavy metals in Łódź agglomeration.
Mariusz Tszydel (2016)
Evaluating impacts using a BACI design, ratios, and a Bayesian approach with a focus on restoration
M. M. Conner (2016)
Phytoplankton, macrophytes and benthic diatoms in lake classification: Consistent, congruent, redundant? Lessons learnt from WFD-compliant monitoring in Poland
Agnieszka Kolada (2016)
Fish recolonization of a lowland river with non-buffered storm water discharges but with abated pollution from a large municipality
Tadeusz Penczak (2017)
Dynamics in cyanobacterial communities from a relatively stable environment in an urbanised area (ambient springs in Central Poland).
Paulina Nowicka-Krawczyk (2017)
Disturbed fish fauna zonation as an indicator of large‐scale human impact: A case study (2011–2012) of the large, lowland Warta River, Poland
Andrzej Kruk (2017)

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