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Table 1
Summary characteristics of environmental variables with abbreviations used in further text. Mean values with range (in brackets) are displayed.
| Environmental variable | Rivers streams | Streams | Canals | Ponds |
|---|---|---|---|---|
| Altitude (m a.s.l.) | 269 (106–605) | 248 (107–662) | 157 (100–532) | 256 (110–594) |
| Shading by woody vegetation higher than 3 m on banks (%; shade) | 34.4 (0–100) | 29.3 (0–100) | 13.1 (0–75) | 70.3 (0–100) |
| Cover of forests in 100 m from the sampling site (%; For) | 22.9 (0–55) | 11.1 (0–45) | 4.4 (0–30) | 35.7 (5–70) |
| Cover of wetlands in 100 m from the sampling site (%; wet) | 0.9 (0–15) | 1.5 (0–15) | 0.8 (0–15) | 22.2 (0–85) |
| Covers of meadows in 100 m from the sampling site (%; mead) | 28.8 (0–74) | 28.3 (0–70) | 20.1 (0–65) | 24.4 (0–75) |
| Cover of arable land in 100 m from the sampling site (%; field) | 19.4 (0–80) | 26.2 (0–90) | 43.6 (0–98) | 10.9 (0–80) |
| Cover of urban areas in 100 m from the sampling site (%; art) | 28.6 (0–75) | 33 (0–90) | 31.4 (0–98) | 6.9 (0–35) |
| Average water depth (cm; depth) | 58.8 (13–185) | 28.8 (7.6–117) | 74.3 (11–700) | 117.2 (22–350) |
| Cover of fine substrate on the bottom (%; Su.fi) | 72.5 (0–100) | 68.5 (0–100) | 75.4 (0–100) | 84.5 (0–100) |
| Cover of sand on the bottom (%; Su.sn) | 10 (0–10) | 18 (0–30) | 16.3 (0–50) | 20 (0–30) |
| Cover of gravel on the bottom (%; Su.gr) | 77.5 (0–100) | 43.8 (0–80) | 27.1 (0–100) | 37.1 (0–70) |
| Current velocity (1 = standing to 4 = faster than 65 cm s−1; W.cur) | 3 (2–4) | 3 (2–4) | 2 (2–3) | 1 |
| Turbidity of water (1 = clear to 3 = turbid; Turb) | 2 (1–3) | 2 (1–3) | 2 (2–3) | 2 (2–3) |
| Oxygene concentration (%; Ox) | (45.8–146.4) | 70.9 (5.2–135.3) | 67.1 (33.9–123.1) | 87.8 (7.1–176.5) |
| Water conductivity (µS cm−1; Cond) | 538.7 (93.2–1337) | 886.2 (153.6–2766.5) | 780.1 (387.9–1479.5) | 596.7 (180.4–1752) |
| Water temperature (°C; Temp) | 16.1 (11.4–22.95) | 16.4 (9.6–37.6) | 17.4 (11.5–21.4) | 19.5 (13.9–26.8) |
| Water reaction (pH; pH) | 8.2 (7.7–8.7) | 7.9 (7.1–8.5) | 7.8 (7.3–8.4) | 8.1 (7.3–8.8) |
Content of water  (mg L−1; NH4) |
1.53 (0.17–10.42) | 0.22 (0–0.43) | 0.54 (0.02–3.97) | 0.34 (0.01–3.11) |
Content of water  - (mg L−1; NO3) |
1.68 (0.65–3.86) | 2.41 (0.45–4.81) | 2.2 (0.38–5.41) | 1.1 (0.21–3.02) |
Content of water  - (mg.L−1; NO2) |
0.14 (0.02–0.38) | 0.10(0–0.28) | 0.11 (0–0.47) | 0.06 (0–0.35) |
Content of water  (mg L−1; PO4) |
0.25 (0–1.28) | 0.11 (0–0.4) | 0.09 (0–0.71) | 0.22 (0–2.41) |
| Water regime type (1 = permanently waterlogged to 4 = dried every year; W.r) | 2 (1–2) | 2 (1–2) | 2 (1–2) | 1 (1–2) |
| Bank slope (gradual/steep; bank) |
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