Ecological parameter: saprobity van Dam et al.

Parameter group: saproby related parameters

Explanation:
Classification as saprobic indicator (degree to which the decomposition of organic material is occurring in an aquatic environment) following van Dam et al. (1994). Two different classifactions are provided: values modified by Coste (Lecointe et al. 1993) and values by van Dam et al. (1994).

Van Dam, H., Mertens, A. & Sinkeldam, J. (1994): A coded checklist and ecological indicator values of freshwater diatoms from the Netherlands. Netherlands J. Aquatic Ecol. 28 (1): 117-133.
Lecointe, C., Coste, M. & Prygiel, J. (1993): OMNIDIA software for taxonomy, calculation of diatom indices and inventories management. Hydrobiologia 269/270: 509-513.

Type of assignment: single category assignment system ()
A description of the coding system can be found here  Abbreviations/Coding Systems

Abbreviations:

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