Information
Ecological parameter: trophic focus
Parameter group: trophy related parameters
Explanation:
The parameter indicates trophic optima of species in different lakes of different ecoregions. The trophic optima were derived based on the current phytoplankton databases for lakes and rivers in Germany. Classifications are made according to the trophic class levels of LAWA (2014) and Pfister et al. (2016).
LAWA (2014): Trophieklassifikation von Seen. Richtlinie zur Ermittlung des Trophie-Index nach LAWA für natürliche Seen, Baggerseen, Talsperren und Speicherseen. Empfehlungen Oberirdische Gewässer. Hrsg. LAWA – Bund/Länder Arbeitsgemeinschaft Wasser. Kulturbuch-Verlag Berlin GmbH. 34 S. zzgl. Access-Auswertetool. (Autoren: Riedmüller, U., Hoehn, E., Mischke, U.). Update des Auswertetools unter: http://www.gewaesserfragen.de/publikationen_2012.htm
Pfister et al. (2016):
Abbreviations:
| Category name: | Abbreviations: | Explanation: |
|---|---|---|
| AAF+CH | AAF+CH | natural lakes, Heavily Modified Water Bodies and Artificial Water Bodies of the Alps, Alpine Foothills and Central Highlands |
| sn.lake – LL | sn.lake – LL | natural stratified lakes of the Lowlands |
| pn.lake - LL | pn.lake - LL | natural polymictic lakes of the Lowlands |
| oligotrophic | oligo | trophic index values: 0.5 – 1.5 |
| mesotrohic | meso | trophic index values: >1.5 – 2.5 |
| mesotrophic 1 | meso1 | trophic index values: > 1.5 – 2.0 |
| mesotrophic 2 | meso2 | trophic index values: > 2.0 – 2.5 |
| eutrophic | eu | trophic index values: >2.5 – 3.5 |
| eutrophic 1 | eu1 | trophic index values: > 2.5 – 3.0 |
| eutrophic 2 | eu2 | trophic index values: > 3.0 – 3.5 |
| polytrophic | poly | trophic index values: > 3.5 – 4.5 |
| polytrophic 1 | poly1 | trophic index values: > 3.5 – 4.0 |
| polytrophic 2 | poly2 | trophic index values: > 4.0 – 4.5 |
| hypereutrophic | hyper | trophic index values: > 4.5 |
| indifferent | in | indifferent species |
| Taxagroup | Number of assigned taxa / total number of taxa - percentage |
|---|---|
| Bacillariophyceae | 135 / 662 - 20.3% |
| Chlorophyceae | 223 / 621 - 35.9% |
| Choanoflagellata | 6 / 14 - 42.8% |
| Chrysophyceae | 45 / 165 - 27.2% |
| Coccolithophyceae | 1 / 5 - 20% |
| Conjugatophyceae | 26 / 299 - 8.6% |
| Coscinodiscophyceae | 21 / 117 - 17.9% |
| Cryptophyceae | 17 / 31 - 54.8% |
| Cyanophyceae | 98 / 246 - 39.8% |
| Dictyochophyceae | 2 / 7 - 28.5% |
| Dinophyceae | 21 / 71 - 29.5% |
| Euglenophyceae | 13 / 69 - 18.8% |
| Fragilariophyceae | 20 / 87 - 22.9% |
| Klebsormidiophyceae | 5 / 11 - 45.4% |
| Prasinophyceae | 3 / 13 - 23% |
| Protozoa | 1 / 8 - 12.5% |
| Trebouxiophyceae | 6 / 16 - 37.5% |
| Ulvophyceae | 1 / 9 - 11.1% |
| Xanthophyceae | 12 / 45 - 26.6% |