Biological condition
Total nitrogen, mg L
-1
Total phosphorus, μg L
-1
Suspended chlorophyll
a
0.172–0.765
6-119
Benthic algal biomass
0.367-0.918
27-62
Benthic diatom index
0.872-1.169
11-74
Benthic macroinvertebrates
0.63-1.92
40-150
Stream fish
0.54-1.83
60-139
Table 3:
Literature reported stream total nitrogen and total phosphorus thresholds determined by predictive relationship threshold analyses of various biological response variables [7].
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