Total number of sampling sites |
2 |
4 |
1 |
2 |
Width |
m |
3-6 |
4-20 |
1.5-3 |
5-7 |
Depth |
0.1-0.3 |
0.2-0.4 |
0.1-0.3 |
0.2-0.4 |
Type of the bottom |
stones, at the first site stones covered with mosses in 30-40% |
stones, at sites 5-6 stones covered with mosses and other algae from the genus Chlorophyta in 20-30% |
stones |
stones, at site 8, larger stones covered with mosses |
Insolation |
site 1 – low site 2 – high |
high at all sites |
low |
site 8 – low site 9 – average |
physicochemical parameters |
Temperature |
°C |
8.0-12.2 |
5.6-10.8 |
7.4-10.0 |
6.1-9.3 |
pH |
|
6.4-8.8 |
6.5-8.6 |
6.4-8.4 |
6.4-8.4 |
Conductivity |
µS cm-1 |
78-254 |
146-278 |
97-246 |
86-284 |
O2 |
mg l-1 |
10.16-10.67 |
10.65-11.44 |
10.6-10.24 |
10.67-11.06 |
Cl- |
0.43-5.33 |
0.65-5.35 |
0.60-5.31 |
0.41-5.59 |
$\text {SO}^{2-}_4$ |
11.05-20.69 |
12.79-26.77 |
16.31-33.34 |
12.53-27.19 |
$\text {NO}^{-}_3 $ |
1.67-2.46 |
1.94-3.15 |
1.78-3.20 |
2.01-2.86 |
$\text {PO}^{2-}_4 $ |
* |
*-0.64 |
* |
* |
$\text {NH}^{+}_4 $ |
0.06-0.71 |
0.14-0.88 |
0.04-0.06 |
0.06-0.13 |
Mg2+ |
5.00-7.82 |
5.26-10.12 |
5.33-9.32 |
5.62-10.10 |
Ca2+ |
30.31-34.25 |
33.72-41.55 |
38.75-39.72 |
32.42-35.31 |
The most frequent taxa |
Achnanthidium pyrenaicum, Cocconeis placentula var. lineata, C. placentula var. euglypta, Diatoma ehrenbergii |
Achnanthidium pyrenaicum, A. minutissimum var. minutissimum, Cymbella parva, Diatoma ehrenbergii |
Achnanthidium pyrenaicum, A. minutissimum var. minutissimum, A. thienemannii, Cymbella parva |
Achnanthidium pyrenaicum, Diatoma ehrenbergii |