Table 3

Városliget pond (Budapest, Hungary). Detailed characteristics of the site and sampling points, with the range of each parameter, during the survey period (August 2018–July 2020).

Environmental parameters Upper section Middle section Lower section
Water temperature (°C) 19.9–38.4 5.3–38.2 2.6–32.1
Water depth (cm) 135–150 10–125 0.05–110
Distance from the bank (m) 0.1– 0.5 0.5– 3 0.1– 0.5
Water velocity (m/s) 0–0.1 0 0
Submerged vegetation (%) 0 0 0–0.02
Emergent vegetation (%) 0 0–0.01 0
Woody debris (%) <10 <10 <20
Shading tree cover (%) <15 <10 <30
Depth of sediment (m) 0.10–0.45 0.05 0.05–0.30
Type of bottom concrete and mud1,2 concrete and mud2 concrete and mud2

1Covered with filamentous algae during vegetation period.

2Leaves observed in the autumn and winter.

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