120
I.M. Schleiter . M. Obach' R. Wagner' H. Wemer' H.-H. Schmidt
. D. Borchardt
7.4.2.2
Anthropogenically Altered Streams
Modelling macro-invertebrate communities depending on water quality or habitat
characteristics was difficult. It was impossible to predict the entire set of 248 taxa
as weIl as the ten best indicators for high organic load (DEV 1990) by eleven or
seven water properties with MFM and MLP networks.
7
A
158 23
7
A
33 13
Figure 7.5. Prediction of Gammarus pulex abundance cIasses (A) based on 7
stream features with GRNN; two variables alter while the remaining 5 are kept
constant at their mean values. T: maximum water temperature [0C]; oxygen, COD
and NH.-N in [mg/I].
I.M. Schleiter . M. Obach' R. Wagner' H. Wemer' H.-H. Schmidt
. D. Borchardt
7.4.2.2
Anthropogenically Altered Streams
Modelling macro-invertebrate communities depending on water quality or habitat
characteristics was difficult. It was impossible to predict the entire set of 248 taxa
as weIl as the ten best indicators for high organic load (DEV 1990) by eleven or
seven water properties with MFM and MLP networks.
7
A
158 23
7
A
33 13
Figure 7.5. Prediction of Gammarus pulex abundance cIasses (A) based on 7
stream features with GRNN; two variables alter while the remaining 5 are kept
constant at their mean values. T: maximum water temperature [0C]; oxygen, COD
and NH.-N in [mg/I].