figure1

Best solution of planning units with a target of 10 without and with trophic weighting (= scaling 0.01-1). (a) red coloured areas show planning units (pu) selected in scenarios without trophic weighting (b) green coloured areas show planning units selected in scenarios with trophic weighting (c) difference in selected planning units with (green area) and without (red area) trophic weighting, grey coloured areas show planning units selected in both scenarios. Broad blue line indicates main stem; thin blue lines indicate tributaries of the Danube River.