Journal cover Journal topic
Web Ecology An open-access peer-reviewed journal
Journal topic
Volume 3, issue 1
Web Ecol., 3, 20-32, 2002
https://doi.org/10.5194/we-3-20-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.
Web Ecol., 3, 20-32, 2002
https://doi.org/10.5194/we-3-20-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.

  21 May 2002

21 May 2002

Seasonal variation of the water quality of rivers and streams of eastern Mediterranean

M. Lazaridou-Dimitriadou M. Lazaridou-Dimitriadou
  • Dept. of Zoology, School of Biology, Fac. of Science, Aristotle Univ., 54006, Thessaloniki, Greece

Abstract. Biotic and abiotic data on undisturbed or moderately disturbed lotic sites from a number of studies carried out in northern Greece showed that large rivers differ from small rivers, streams or creeks in terms of diversity, dominant groups and the kind of taxa (concerning the sensitivity of the taxa according to Biological Monitoring Working Party (BMWP) biotic scores). This is mainly due to the differences in their physical characteristics. Correlation of the environmental variables using MDA (multiple discriminant analysis) showed that the chief differentiating factors among the above water bodies are substrate, total suspended solids (TSS), conductivity, slope and temperature. Additionally, there is no clear phenological seasonality in the majority of the dominant benthic macroinvertebrate groups when undisturbed or moderately disturbed sites of mountainous creeks and small rivers are examined. By contrast, in downstream sites of long rivers, seasonality characterizes the dominant benthic macroinvertebrate groups, as it does for other Mediterranean animals.

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