Fig 1.
Overview of the study workflow.
Fig 2.
Deviations in ecological status class (ESC) estimates obtained from presence/absence data using ASTERICS for 13,312 samples from 30 German stream types (y-axis, numbers in parentheses = data points).
Green indicates the proportion of ESCs that remained identical, yellow indicates those that differed by ±1 and orange indicates those that differed by ±2 ESCs. Deviations in the negative (worse) direction are shown on the left and deviations towards a more positive assessment (better) are shown on the right side.
Table 1.
Deviation between presence/absence and abundance data for different assessment metrics.
The diagonal displays the numbers of sampling sites for which the results did not differ between the two data types.
Fig 3.
Deviations in general degradation module (GDM) results calculated from presence/absence data using ASTERICS for 13,295 samples from 30 German stream types (y-axis, numbers in parentheses = data points).
Green indicates assessment values that remained identical, yellow indicates those that differed by ±1 and orange indicates those that differed by ±2 classes. Deviations in the negative (worse) direction are shown on the left and deviations towards a more positive assessment (better) are shown on the right side.
Fig 4.
Deviations in organic pollution module results calculated with presence/absence data using ASTERICS for 13,312 samples from 30 different German stream types (y-axis, numbers in parentheses = data points).
Green indicates assessment values that remained identical, yellow indicates values that differed by ±1 and orange indicates value that differed by ±2 classes. Deviations in the negative (worse) direction are shown on the left and deviations towards a more positive assessment (better) are shown on the right side.
Fig 5.
Regression analysis of presence/absence (y-axis) and abundance-based data (x-axis) for two metrics of the general degradation module: A) German fauna index, B) EPT[%].
Fig 6.
Regression analysis of presence/absence (y-axis) and abundance-based data (x-axis) for the German saprobic index (organic pollution module, OPM).