The conservation of small water reservoirs in the Krajeńskie Lakeland (North-West Poland)

Ponds in the study area (n = 450) were also analysed for anthropogenic impacts. Anthropogenic stressors were observed in 51% of ponds. The most serious threats to the ponds of the Krajeńskie Lakeland were deterioration due to drainage and eutrophication. Over 35% of ponds were connected to a network of drainage ditches, with the highest percentage (57.1%) found in mid-forest ponds type.