Ecological parameter: IC CB-GIG ITEM score

Parameter group: trophy related parameters

Explanation:
The ITEM (Index of Trophy for European Macrophytes in Rivers) score provides information on the nutrient preference of a macrophyte species and thus provides information about the nutrient pollution (mainly phosphorous) of a river. The scale ranges from 1 (highly sensitive to nutrient pollution) to 10 (highly tolerant to nutrient pollution).

Birk, S., Willby, N., Chauvin, C., Coops, H.C., Denys, L., Galoux, D., Kolada, A., Pall, K., Pardo, I., Pot, R. & Stelzer, D. (2007): Report on the Central Baltic River GIG Macrophyte Intercalibration Exercise, 82 pp. https://www.uni-due.de/imperia/md/content/aquatische_oekologie/e_cbrivgig_macrophytes_final_report_june-07-v2.pdf

Abbreviations:

Category name:	Abbreviations:	Explanation:
ITEM score (range: 1.00 - 8.47)	ITEM score

Assigned taxa for each higher systematic unit:

Taxagroup	Number of assigned taxa / total number of taxa - percentage
Bryopsida	63 / 213 - 29.5%
Charophyceae	14 / 52 - 26.9%
Liliopsida	114 / 361 - 31.5%
Lycopsida	1 / 12 - 8.3%
Magnoliopsida	5 / 20 - 25%
Marchantiopsida	34 / 62 - 54.8%
Polypodiopsida	3 / 19 - 15.7%
Rosopsida	109 / 399 - 27.3%
Sphenopsida	3 / 9 - 33.3%