22.05.2020
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Sampling
Sampling spots
Sampling sites | Latitude | Longitude |
---|---|---|
M1 | 51.589308 N | 8.755923 E |
M2 | 51.589975 N | 8.754721 E |
M3 | 51.590694 N | 8.754786 E |
M4 | 51.597248 N | 8.760392 E |
M5 | 51.602579 N | 8.760392 E |
M6 = M3b | 51.5909370 N | 8.7549049 E |
Hydrology
Hyperrheic: /
Eurheic: /
Oligorheic: M1, M2, M3
Arheic: M4, M6 = M3b
Hyprheic: M5
Physicochemical composition
Sampling site | Q [l/s] |
Conductivity [mS/cm] |
pH | Temp [°C] |
Comments |
---|---|---|---|---|---|
M1 | 0,1 | 0,600 | 8,07 | 12,0 | humic, salamanders |
M2 | 0,1 | 0,554 | 8,08 | 12,6 | fine sediment |
M3 | 0,06 | 0,543 | 8,14 | 12,6 | small cobbles |
M4 | 0,01 | 0,425 | 7,9 | 13 | wet, no apparent current |
M5 | / | / | / | / | dry |
M6 = M3b | 0,02 | 0,54 | 8,22 | 13 | tadpoles |
Diatom survival
Smaller + narrower diatoms dead, wider = resistant
Sampling sites | Dead [%] | Alive [%] | Resistant [%] | Lipid increase | Other algae | Zoological | Diatom species | Comments |
---|---|---|---|---|---|---|---|---|
M1 | 32.3 | 54.8 | 12.9 | / | / | Paramecia can have eaten most diatoms and Salamander tadpoles | / | Top down regulation? / Too little diatoms (n = 31) |
M2 | 18.3 | 57.2 | 24.5 | 3.7 | / | / | Nitzschia acicularis, Gomphonematal | Arbuscular diatoms |
M3 | 16.7 | 69.6 | 13.7 | 3.5 | / | Rotifera & Paramecia | / | Teratologies |
M4 | 14.7 | 69.8 | 15.5 | 1.6 | Chlorococcal, Euglena, Closterium, Synura | Paramecium | Rhoicosphenia abbreviata | / |
M5 | 27,1 | / | 72,9 | / | Cyanobacteria (Oscillatorials, Coccal) | Mycohyphae | / | / |
M6 = M3b | 8.1 | 73.9 | 18 | 11.9 | Cyanobacteria (Oscillatorials,...), Chlorophyta (Mougeotia) | Tadpoles | Amphora pediculus, Encyonema ventricosum, Nitzschia microcephala | Teratologies |