Table 1
The morphometrics of the study lakes, range of their total phosphorus concentration (Tot. P) and colour content for the water sampling period. For the period, the first and the last year of water samples are given, but sampling did not occur necessarily every year. The selected water samples were taken during winter and from the middle of the water column, if available. N.A. = not available, * Values from a much more recent period than the vendace study period.
| Lake | Area km2 | Ave. depth m | Max. depth m | Tot. P μl–1 | Color content mg Ptl–1 | Period, depth |
|---|---|---|---|---|---|---|
| Yli-Kitka | 237 | 6.6 | 41 | 2–10 | 5–20 | 1974–1992, 15 m |
| Kiitämö | 19 | 6.7 | 22 | 4 | 5 | 1973, 10 m |
| Kirpistö | 21 | N.A. | 17 | 6 | 14 | 1973, 1 m, 10 m |
| Kuusamo | 47 | 3.4 | 18 | 6–17 | 15–30 | 1979–1991, 10 m |
| Muojärvi | 55 | 5.4 | 36 | 5–10 | 10–20 | 1976–1992, 10 m |
| Kostonjärvi | 44 | 5.1 | 17 | 8–28 | 35–59 | 1979–1987, 5 m |
| Kerojärvi | 21 | N.A. | 17 | 8–11 | 29–40 | 1973–1985, 1 m |
| Irnijärvi | 32 | 5.6 | 24 | 4–18 | 15–60 | 1973–1992, 10 m |
| Oulu | 887 | 7.6 | 35 | 5–28 | 30–80 | 1974–2006, 15 m |
| Ylä-Keitele | 79 | 8.8 | 66 | 3–10 | 30–50 | 1991–2004*, 10 m |
| Keski-Keitele | 327 | 6.6 | 33 | 5 | 25–38 | 1965–1970*, 10 m |
| Southern Konnevesi | 122 | 12.5 | 57 | 4–7 | 15–30 | 1984–2009, 25 m |
| Onkamo | 32 | 3.6 | 12 | 6–21 | 10–25 | 1980–2012, 1 m |
| Pyhäselkä | 361 | 8.8 | 67 | 5–11 | 50–110 | 1990–2009, 30–34 m |
| Puruvesi | 416 | 8.8 | 61 | 3–8 | 5–10 | 1973–2017, 15 m |
| Pyhäjärvi SE Finland | 248 | 7.8 | 27 | 3–7 | 5–20 | 1984–2017, 13–15 m |
| Puula | 331 | 9.2 | 62 | 2–5 | 10–32 | 1984–2022, 25 m |
| Päijänne, Tehinselkä | 250 | >16.0 | 61 | 7–11 | 24–40 | 1981–1991, 25 m |
| Southern Saimaa | 621 | 8.4 | 70 | 4–10 | 25–45 | 2001–2021, 20 m |
| Vesijärvi | 108 | 6.1 | 40 | 20–25 | 10–20 | 1967–1970*, 15 m |
| Pyhäjärvi SW Finland | 155 | 5.5 | 26 | 10–34 | 10–40 | 1978–2021, 15 m |
| Pyhäjärvi Kar. Isthm. | 68 | N.A. | 30 | N.A. | N.A. |
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