Sandimirov S.S. Catalogue of lakes in the Russian, Finnish and Norwegian Border Area. Finland, Jyvaskyla: Kopijyva Oy, 2008.

Table 10. The organic matter contents (LOI, % ) and heavy metal concentra­ tions (цд/д, dry weight) in the surface (О-1cm) and pre-industrial (13-14 cm) sediment layers. Cf and Cdare contamina­ tion factor and degree of contamination values, respectively. Fig. 7. Vertical distribution of the concentrations ofNi, Cu, Cd and Hg (цд/д, dry weight) in the sediment core ofLake Peschanoe. Lake Layer, cm LOI Cu NI Zn Co Cd Pb As Hg cd Peschanoe 0-1 13-14 22.85 18.23 733 16 270 18 96 51 49.3 7.5 0.73 0.08 15.2 1.5 19.8 5.99 0.199 0.023 c, 44.7 15.3 1.9 6.5 9.1 10.3 3.3 8.6 99.7 1.10.3. Hydrobiological studies No direct hydrobiological investigations have been carried out in this lake. According to earlier studies (Yakovlev et al., 1991), the lakes near the “Pechenganikel” smelter have low biodiversity levels. The dominant species are chironomids, water-bugs and beetles. Dwarf burbot (Lota lota) should most probably also be present. 1.11. LAKE PIKKU-HEYNJAJARVI Lake Pikku-Heynjajarvi (watershed of the river Pechenga) is located 15 km to the east of the town of Zapolyarny and 17 km to the south of the settlement of Pechenga. It is a small (area of the lake 0.28 km2), shallow-water (maximum depth 11 m), oval lake, elongated from the east to the west, and of glacial ori­ gin. The maximum length is 900 m and maximum width 420 m. The point of maximum depth (11 m) is located in the central part of the lake. According to the landscape type, the watershed belongs to the forest-tundra zone with heights of up to 328.0 m (Kjalojarvi fell). The lake shores are high and rocky. The Physico-geographical characteristics Watershed River Pechenga Latitude 69°23.552' Longitude 31°12.491' Height above sea level, m 191.0 Maximum length, km 0.9 Maximum width, km 0.42 Maximum depth, m 11 Area, m2 0.28 Watershed area, km2 12.5 Study period 2004 36 Catalogue o f Lakes in the Russian, Finnish and Norwegian BorderArea