Information

Ecological parameter:  saprobity van Dam

Parameter group: saprobic preference parameters

Explanation:
Assessment of sabrobity (degree to which the decomposition of organic material is occurring in an aquatic environment) following van Dam et al. 1994, modified by Coste (Lecointe et al. 1993).
Assessment of sabrobity (degree to which the decomposition of organic material is occurring in an aquatic environment) following van Dam et al. (1994).

1= oligosaprobous oxygen saturation >85% BOD5 20 (mgl-1) <2
2= beta-mesosaprobous oxygen saturation 70-85% BOD5 20 (mgl-1) 2-4
3= alpha-mesosaprobous oxygen saturation 25-70% BOD5 20 (mgl-1) 4-13
4= alpha-meso/polysaprobous oxygen saturation 10-25% BOD5 20 (mgl-1) 13-22
5= polysaprobous oxygen saturation <10% BOD5 20 (mgl-1) >22

Assigned taxa for each higher systematic unit
TaxagroupNumber of assigned taxa / total number of taxa - percentage
Araphidees92 / 577 - 15.9%
Brachyraphydees51 / 366 - 13.9%
Centrophycidees52 / 847 - 6.1%
Epithemiacees9 / 82 - 10.9%
Monoraphidees81 / 528 - 15.3%
Naviculacees448 / 5376 - 8.3%
Nitzschiacees108 / 801 - 13.4%
Surirellacees36 / 291 - 12.3%