The ecological state of the Tisa river and its tributaries indicated by the macroinvertebrates

People start to be aware of the possibility to use the tolerant species as environment indicators. Covering up the ccological demand of different species, we would be able to understand more and more from their signals and to use them in qualification of the ecological changes. The ccological qualif...

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Bibliographic Details
Main Author: Szító András
Format: Book part
Published: 2002
Series:Tiscia monograph series
Ecological aspects of the Tisa River Basin : 10 years anniversary regional conference 21nd - 24th March 2002., Târgu Mureş, Romania
Kulcsszavak:Tisza - ökológia
Subjects:
Online Access:http://acta.bibl.u-szeged.hu/10262
Description
Summary:People start to be aware of the possibility to use the tolerant species as environment indicators. Covering up the ccological demand of different species, we would be able to understand more and more from their signals and to use them in qualification of the ecological changes. The ccological qualification may be on a species level only. The upper species categories are not enough for this work. The lack of bcnthic invertebrates may be often due to the lack of the sediment, like in the Upper Tisa Region. The high individual density of a species may be caused by the optimal food source for them, but extraordinary high in hypertrophic situation sometimes. Oligochactc spccics often producc extreme high individual density, but the spccics richncss is rcduccd to one or two spccics only. Limnodrilus hqffmeisteri is the most tolerant spccics in our investigated regions, it is present in hypertrophic relations. The lack of the tolerant indicator species in an ecosystem may indicate continuous or temporary oxygen depletion, moreover high organic material pollution or chemical poisoning. The monitoring data show a temporary picture about the state of the investigated ecosystems. The continuous and complex works may detect and present the ccological changes. Clean water indicator, moderate tolerant and tolerant spccics were identified.
Physical Description:99-147
ISSN:1418-0448