Kisejärve landscape conservation area
Tsiistrenukk is home to the naturally scenic Kisejärve landscape conservation area. The landscape conservation area is primarily for protection of oligotrophic and dystrophic lakes. The Kisejärve lakes are seven: Kisejärv (48.9 ha, depth up to 5.1 m), Pahijärv (10 ha), Sõdaalune Lake (8,5 ha), Mägialune Lake, Luikjärv, Vuuhjärv and Kõrbjärv. It is likely that Kisejärv and smaller lakes formed as a single lake with many coves and islands, which became multiple lakes as it paludified and the water level dropped.
The largest lake in the area – Kisejärv – can be viewed from an RMK bonfire area on the eastern shore. It is hard to conjure up, now, the erstwhile shepherd who has brought his herds to these shores and had them swim across the narrow neck of lake separating this shore from opposite Vaivasaar. Or wonder why the knolls along the bank were called Vaivasaar, Küpärsaar, Hainasaar, Valdnasaar, Ritskasaar and Maasikasaar. Or to cast the fishing rod into water and puzzle which side of the snake is a fool.
Perch and roach are the most common fish species. Pike, ruff, bream, rudd and tench is also found; a link to Pedetsi River resulted in eel populations at one time. Before the water level was lowered in 1939, the lake was famous for crayfish and although the harsh winter of 1995-1996 reduced populations, they are recovering thanks to stocking. A number of rare algae species and water fleas have been found in Kisejärv. Of protected bird species, the osprey nests here.
The Kisejärve protection area is also home to orchids. Valuable archaeological finds have also been uncovered at Kisejärv: up to 1000-year-old boats and fishing tackle.
Of the Kisejärv lakes, Pahijärv is the most of interest to science. It is an older oligotrophic lake, which in spite of paludification and muddiness (depth only 2 m, with hydrogen sulphide at the bottom) and lack of thermocline has over 15 different rare species of algae, which usually live only in clear cold water lakes.
Download the Kisejärve landscape protection area protection plan 2010-2019 in Estonian here.